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GitHub - softwaremill/macwire: Lightweight and Nonintrusive Scala Dependency Injection Library
Zero-cost, compile-time, type-safe dependency injection library.
The core of MacWire is a set of macros, that is code which runs at compile-time. The macros generate the new
instance
creation code automatically, allowing you to avoid a ton of boilerplate code, while maintaining type-safety.
The core library has no dependencies, and incurs no run-time overhead. The main mechanism of defining dependencies of a
class are plain constructors or apply
methods in companion objects. MacWire doesn't impact the code of your classes
in any way, there are no annotations that you have to use or conventions to follow.
There's a couple of wiring variants that you can choose from:
autowire
create an instance of the given type, using the provided dependencies. Any missing dependencies are created using constructors/apply
methods.wire
create an instance of the given type, using dependencies from the context, within which it is called. Dependencies are looked up in the enclosing trait/class/object and parents (via inheritance).wireRec
is a variant ofwire
, which creates missing dependencies using constructors.
In other words, autowire
is context-free, while the wire
family of macros is context-dependent.
MacWire is available for Scala 2.12, 2.13 and 3 on the JVM, JS and Native platforms. Not all functionalities are available for each Scala version.
To use, add the following dependency:
// sbt
"com.softwaremill.macwire" %% "macros" % "2.6.4" % "provided"
// scala-cli
//> using dep com.softwaremill.macwire::macros:2.6.4
Table of Contents
- Table of Contents
- autowire
- wire
- Autowire for cats-effect
- Interceptors
- Qualifiers
- Development
- Platform and version-specifics
- Other
autowire
Autowire generates the code needed to instantiate the given type. To create the instance, the public primary
constructor is used, or if one is absent - the apply
method from the companion object. Any dependencies are
created recursively. For example, given the following classes:
class DatabaseAccess()
class SecurityFilter()
class UserFinder(databaseAccess: DatabaseAccess, securityFilter: SecurityFilter)
class UserStatusReader(userFinder: UserFinder)
invoking autowire
as below:
import com.softwaremill.macwire.*
val userStatusReader = autowire[UserStatusReader]()
generates following code:
val userStatusReader =
val wiredDatabaseAccess = new DatabaseAccess()
val wiredSecurityFilter = new SecurityFilter()
val wiredUserFinder = new UserFinder(wiredDatabaseAccess, wiredSecurityFilter)
val wiredUserStatusReader = new UserStatusReader(wiredUserFinder)
wiredUserStatusReader
autowire
accepts an arbitrary number of parameters, which specify how to lookup or create dependencies, instead
of the default construct/apply
mechanism. These are described in detail below. Each such parameter might be:
- an instance to use
- a function to create an instance
- a class to instantiate to provide a dependency for the types it implements (provided as:
classOf[SomeType]
) - a
autowireMembersOf(instance)
call, to use the members of the given instance as dependencies
autowire
is context-free: its result does not depend on the environment, within which it is called (except for
implicit parameters, which are looked up using the usual mechanism). It only depends on the type that is specified
for wiring, and any parameters that are passed.
Providing instantiated dependencies
In some cases it's necessary to instantiate a dependency by hand, e.g. to initialise it with some configuration,
or to manage its lifecycle. In such cases, dependencies can be provided as parameters to the autowire
invocation.
They will be used whenever a value of the given type is needed.
As an example, consider a DataSource
, which needs to be configured with a JDBC connection string, and has a
managed life-cycle:
import java.io.Closeable
class DataSource(jdbcConn: String) extends Closeable { def close() = () }
class DatabaseAccess(ds: DataSource)
class SecurityFilter()
class UserFinder(databaseAccess: DatabaseAccess, securityFilter: SecurityFilter)
class UserStatusReader(userFinder: UserFinder)
We can provide a DataSource
instance to be used by autowire
:
import com.softwaremill.macwire.*
import scala.util.Using
Using.resource(DataSource("jdbc:h2:~/test")): ds =>
autowire[UserStatusReader](ds)
Using factories
In addition to instances, which should be used by autowire
, it's also possible to provide factory methods. They will
be used to create instances of types which is the result of the provided function, using the dependencies which are the
function's parameters. Any dependencies are recursively created.
For example, we can provide a custom way to create a UserFinder
:
class DatabaseAccess()
class SecurityFilter()
class UserFinder(databaseAccess: DatabaseAccess, securityFilter: SecurityFilter,
adminOnly: Boolean)
class UserStatusReader(userFinder: UserFinder)
autowire[UserStatusReader](UserFinder(_, _, adminOnly = true))
Specifying implementations to use
You can specify which classes to use to create instances. This is useful when the dependencies are expressed for
example using trait
s, not the concrete types. Such a dependency can be expressed by providing a classOf[]
parameter to autowire
:
trait DatabaseAccess
class DatabaseAccessImpl() extends DatabaseAccess
class SecurityFilter()
class UserFinder(databaseAccess: DatabaseAccess, securityFilter: SecurityFilter)
class UserStatusReader(userFinder: UserFinder)
autowire[UserStatusReader](classOf[DatabaseAccessImpl])
Without the classOf[]
, MacWire wouldn't know how to create an instance implementing DatabaseAccess
.
Using dependencies contained in objects
Finally, it's possible to use the members of a given instance as dependencies. Simply pass a autowireMembersOf(someInstance)
as a parameter to autowire
.
Errors
autowire
reports an error when:
- a dependency can't be created (e.g. there are no public constructors /
apply
methods) - there are circular dependencies
- the provided dependencies contain a duplicate
- a provided dependency is not used
- a primitive or
String
type is used as a dependency (instead, use e.g. an opaque type)
Each error contains the wiring path. For example, below there's no public constructor for DatabaseAccess
, which
results in a compile-time error:
class DatabaseAccess private ()
class SecurityFilter()
class UserFinder(databaseAccess: DatabaseAccess, securityFilter: SecurityFilter)
class UserStatusReader(userFinder: UserFinder)
autowire[UserStatusReader]()
// compile-time error:
// cannot find a provided dependency, constructor or apply method for: DatabaseAccess;
// wiring path: UserStatusReader -> UserFinder -> DatabaseAccess
Limitiations of autowire
autowire
doesn't handle propagating generic type parameters, when creating missing dependencies using constructors or
apply
methods. E.g. if you have a class B[X](a: A[X])
, and a B[Int]
needs to be created, the specific value for
the type parameter X
won't be propagated when resolving the dependencies.
As a work-around, you need to explicitly provide the generic dependencies with concrete type parameters. A generic
dependency might appear multiple times, with different type parameters. To wire the classes from the example, you'd
need: autowire[...](B[Int](_), someInstance: A[Int])
or similar.
wire
MacWire generates new
instance creation code of given classes, using values in the enclosing type for constructor
parameters, with the help of Scala Macros.
For a general introduction to DI in Scala, take a look at the Guide to DI in Scala, which also features MacWire.
MacWire helps to implement the Dependency Injection (DI) pattern, by removing the need to write the class-wiring code by hand. Instead, it is enough to declare which classes should be wired, and how the instances should be accessed (see Scopes).
Classes to be wired should be organized in "modules", which can be Scala trait
s, class
es or object
s.
Multiple modules can be combined using inheritance or composition; values from the inherited/nested modules are also
used for wiring.
MacWire can be in many cases a replacement for DI containers, offering greater control on when and how classes are instantiated, typesafety and using only language (Scala) mechanisms.
Example usage:
class DatabaseAccess()
class SecurityFilter()
class UserFinder(databaseAccess: DatabaseAccess, securityFilter: SecurityFilter)
class UserStatusReader(userFinder: UserFinder)
trait UserModule {
import com.softwaremill.macwire._
lazy val theDatabaseAccess = wire[DatabaseAccess]
lazy val theSecurityFilter = wire[SecurityFilter]
lazy val theUserFinder = wire[UserFinder]
lazy val theUserStatusReader = wire[UserStatusReader]
}
will generate:
trait UserModule {
lazy val theDatabaseAccess = new DatabaseAccess()
lazy val theSecurityFilter = new SecurityFilter()
lazy val theUserFinder = new UserFinder(theDatabaseAccess, theSecurityFilter)
lazy val theUserStatusReader = new UserStatusReader(theUserFinder)
}
For testing, just extend the base module and override any dependencies with mocks/stubs etc, e.g.:
trait UserModuleForTests extends UserModule {
override lazy val theDatabaseAccess = mockDatabaseAccess
override lazy val theSecurityFilter = mockSecurityFilter
}
The core library has no dependencies.
For more motivation behind the project see also these blogs:
- Dependency injection with Scala macros: auto-wiring
- MacWire 0.1: Framework-less Dependency Injection with Scala Macros
- MacWire 0.2: Scopes are simple!
- Implementing factories in Scala & MacWire 0.3
- Dependency Injection in Play! with MacWire
- MacWire 0.5: Interceptors
- Using Scala traits as modules, or the "Thin Cake" Pattern
How wiring works
For each constructor parameter of the given class, MacWire tries to find a value conforming to the parameter's type in the enclosing method and trait/class/object:
- first it tries to find a unique value declared as a value in the current block, argument of enclosing methods and anonymous functions.
- then it tries to find a unique value declared or imported in the enclosing type
- then it tries to find a unique value in parent types (traits/classes)
- if the parameter is marked as implicit, it is ignored by MacWire and handled by the normal implicit resolution mechanism
Here value means either a val
or a no-parameter def
, as long as the return type matches.
A compile-time error occurs if:
- there are multiple values of a given type declared in the enclosing block/method/function's arguments list, enclosing type or its parents.
- parameter is marked as implicit and implicit lookup fails to find a value
- there is no value of a given type
The generated code is then once again type-checked by the Scala compiler.
Factories
A factory is simply a method. The constructor of the wired class can contain parameters both from the factory (method) parameters, and from the enclosing/super type(s).
For example:
class DatabaseAccess()
class TaxDeductionLibrary(databaseAccess: DatabaseAccess)
class TaxCalculator(taxBase: Double, taxDeductionLibrary: TaxDeductionLibrary)
trait TaxModule {
import com.softwaremill.macwire._
lazy val theDatabaseAccess = wire[DatabaseAccess]
lazy val theTaxDeductionLibrary = wire[TaxDeductionLibrary]
def taxCalculator(taxBase: Double) = wire[TaxCalculator]
// or: lazy val taxCalculator = (taxBase: Double) => wire[TaxCalculator]
}
will generate:
trait TaxModule {
lazy val theDatabaseAccess = new DatabaseAccess()
lazy val theTaxDeductionLibrary = new TaxDeductionLibrary(theDatabaseAccess)
def taxCalculator(taxBase: Double) =
new TaxCalculator(taxBase, theTaxDeductionLibrary)
}
Factory methods
You can also wire an object using a factory method, instead of a constructor. For that, use wireWith
instead of
wire
. For example:
class A()
class C(a: A, specialValue: Int)
object C {
def create(a: A) = new C(a, 42)
}
trait MyModule {
lazy val a = wire[A]
lazy val c = wireWith(C.create _)
}
lazy val
vs. val
It is safer to use lazy val
s, as when using val
, if a value is forward-referenced, it's value during initialization
will be null
. With lazy val
the correct order of initialization is resolved by Scala.
Recursive wiring
When using wire
and a value for a parameter can't be found, an error is reported. wireRec
takes a different
approach - it tries to recursively create an instance, using normal wiring rules. This allows to explicitly wire
only those objects, which are referenced from the code, skipping helper or internal ones.
The previous example becomes:
class DatabaseAccess()
class SecurityFilter()
class UserFinder(databaseAccess: DatabaseAccess, securityFilter: SecurityFilter)
class UserStatusReader(userFinder: UserFinder)
trait UserModule {
import com.softwaremill.macwire._
lazy val theUserStatusReader = wireRec[UserStatusReader]
}
and will generate:
trait UserModule {
lazy val theUserStatusReader = new UserStatusReader(
new UserFinder(new DatabaseAccess(), new SecurityFilter()))
}
This feature is inspired by @yakivy's work on jam.
Composing modules
Modules (traits or classes containing parts of the object graph) can be combined using inheritance or composition.
The inheritance case is straightforward, as wire
simply looks for values in parent traits/classes. With composition,
you need to tell MacWire that it should look inside the nested modules.
To do that, you can use imports:
class FacebookAccess(userFind: UserFinder)
class UserModule {
lazy val userFinder = ... // as before
}
class SocialModule(userModule: UserModule) {
import userModule._
lazy val facebookAccess = wire[FacebookAccess]
}
Avoiding imports
Dependency:
"com.softwaremill.macwire" %% "util" % "2.6.4"
If you are using that pattern a lot, you can annotate your modules using @Module
, and they will be used when
searching for values automatically:
class FacebookAccess(userFind: UserFinder)
@Module
class UserModule { ... } // as before
class SocialModule(userModule: UserModule) {
lazy val facebookAccess = wire[FacebookAccess]
}
Scopes
Dependency:
"com.softwaremill.macwire" %% "proxy" % "2.6.4"
There are two "built-in" scopes, depending on how the dependency is defined:
- singleton:
lazy val
/val
- dependent - separate instance for each dependency usage:
def
MacWire also supports user-defined scopes, which can be used to implement request or session scopes in web applications.
The proxy
subproject defines a Scope
trait, which has two methods:
apply
, to create a scoped valueget
, to get or create the current value from the scope
To define a dependency as scoped, we need a scope instance, e.g.:
trait WebModule {
lazy val loggedInUser = session(new LoggedInUser)
def session: Scope
}
With abstract scopes as above, it is possible to use no-op scopes for testing (NoOpScope
).
There's an implementation of Scope
targeted at classical synchronous frameworks, ThreadLocalScope
. The apply method
of this scope creates a proxy (using javassist); the get method
stores the value in a thread local. The proxy should be defined as a val
or lazy val
.
In a web application, the scopes have to be associated and disassociated with storages. This can be done for example in a servlet filter. To implement a:
- request scope, we need a new empty storage for every request. The
associateWithEmptyStorage
is useful here - session scope, the storage (a
Map
) should be stored in theHttpSession
. Theassociate(Map)
method is useful here
For example usage see the MacWire+Scalatra example sources.
You can run the example with sbt examples-scalatra/run
and going to http://localhost:8080.
Note that the proxy
subproject does not depend on MacWire core, and can be used stand-alone with manual wiring or any other
frameworks.
Accessing wired instances dynamically
Dependency:
"com.softwaremill.macwire" %% "util" % "2.6.4"
To integrate with some frameworks (e.g. Play 2) or to create instances of classes
which names are only known at run-time (e.g. plugins) it is necessary to access the wired instances dynamically.
MacWire contains a utility class in the util
subproject, Wired
, to support such functionality.
An instance of Wired
can be obtained using the wiredInModule
macro, given an instance of a module containing the
wired object graph. Any vals
, lazy val
s and parameter-less def
s (factories) from the module which are references
will be available in the Wired
instance.
The object graph in the module can be hand-wired, wired using wire
, or a result of any computation.
Wired
has two basic functionalities: looking up an instance by its class (or trait it implements), and instantiating
new objects using the available dependencies. You can also extend Wired
with new instances/instance factories.
For example:
// 1. Defining the object graph and the module
trait DatabaseConnector
class MysqlDatabaseConnector extends DatabaseConnector
class MyApp {
def securityFilter = new SecurityFilter()
val databaseConnector = new MysqlDatabaseConnector()
}
// 2. Creating a Wired instance
import com.softwaremill.macwire._
val wired = wiredInModule(new MyApp)
// 3. Dynamic lookup of instances
wired.lookup(classOf[SecurityFilter])
// Returns the mysql database connector, even though its type is MysqlDatabaseConnector,
// which is assignable to DatabaseConnector.
wired.lookup(classOf[DatabaseConnector])
// 4. Instantiation using the available dependencies
{
package com.softwaremill
class AuthenticationPlugin(databaseConnector: DatabaseConnector)
}
// Creates a new instance of the given class using the dependencies available in MyApp
wired.wireClassInstanceByName("com.softwaremill.AuthenticationPlugin")
Limitations
When:
- referencing wired values within the trait/class/object
- using multiple modules in the same compilation unit
- using multiple modules with scopes
due to limitations of the current macros implementation in Scala (for more details see this discussion) to avoid compilation errors it is recommended to add type ascriptions to the dependencies. This is a way of helping the type-checker that is invoked by the macro to figure out the types of the values which can be wired.
For example:
class A()
class B(a: A)
// note the explicit type. Without it wiring would fail with recursive type compile errors
lazy val theA: A = wire[A]
// reference to theA; if for some reason we need explicitly write the constructor call
lazy val theB = new B(theA)
This is an inconvenience, but hopefully will get resolved once post-typer macros are introduced to the language.
Also, wiring will probably not work properly for traits and classes defined inside the containing trait/class, or in super traits/classes.
Note that the type ascription may be a subtype of the wired type. This can be useful if you want to expose e.g. a trait that the wired class extends, instead of the full implementation.
Akka integration
Dependency:
"com.softwaremill.macwire" %% "macrosakka" % "2.6.4" % "provided"
Macwire provides wiring suport for akka through the macrosAkka
module.
Here
you can find example code. The module adds three macros wireAnonymousActor[A]
, wireActor[A]
and wireProps[A]
which help create instances of akka.actor.ActorRef
and akka.actor.Props
.
These macros require an ActoRefFactory
(ActorSystem
or Actor.context
) to be in scope as a dependency.
If actor's primary constructor has dependencies - they are required to be in scope as well.
Example usage:
import akka.actor.{Actor, ActorRef, ActorSystem}
class DatabaseAccess()
class SecurityFilter()
class UserFinderActor(databaseAccess: DatabaseAccess, securityFilter: SecurityFilter) extends Actor {
override def receive: Receive = {
case m => // ...
}
}
import com.softwaremill.macwire._
import com.softwaremill.macwire.akkasupport._
val theDatabaseAccess = wire[DatabaseAccess] //1st dependency for UserFinderActor
//it compiles to: val theDatabaseAccess = new DatabaseAccess
val theSecurityFilter = wire[SecurityFilter] //2nd dependency for UserFinderActor
//it compiles to: val theSecurityFilter = new SecurityFilter
val system = ActorSystem("actor-system") //there must be instance of ActoRefFactory in scope
val theUserFinder = wireActor[UserFinderActor]("userFinder")
//this compiles to:
//lazy val theUserFinder = system.actorOf(Props(classOf[UserFinderActor], theDatabaseAccess, theSecurityFilter), "userFinder")
In order to make it working all dependencies created Actor
's (UserFinderActor
's) primary constructor and
instance of the akka.actor.ActorRefFactory
must be in scope. In above example this is all true. Dependencies
of the UserFinderActor
are DatabaseAccess
and SecurityFilter
and they are in scope.
The ActorRefFactory
is in scope as well because ActorSystem
which is subtype of it is there.
Creating actor within another actor is even simpler than in first example because we don't need to have ActorSystem
in scope.
The ActorRefFactory
is here because Actor.context
is subtype of it. Let's see this in action:
class UserStatusReaderActor(theDatabaseAccess: DatabaseAccess) extends Actor {
val theSecurityFilter = wire[SecurityFilter]
val userFinder = wireActor[UserFinderActor]("userFinder")
//this compiles to:
//val userFinder = context.actorOf(Props(classOf[UserFinderActor], theDatabaseAccess, theSecurityFilter), "userFinder")
override def receive = ...
}
The difference is that previously macro expanded into system.actorOf(...)
and when inside another actor it expanded into context.actorOf(...)
.
It's possible to create anonymous actors. wireAnonymousActor
is for it:
val userFinder = wireAnonymousActor[UserFinderActor]
//this compiles to:
//val userFinder = context.actorOf(Props(classOf[UserFinderActor], theDatabaseAccess, theSecurityFilter))
How about creating akka.actor.Props
? It's there and can be achieved by calling wireProps[A]
.
Wiring only Props
can be handy when it's required to setup the Props
before passing them to the actorOf(...)
method.
Let's say we want to create some actor with router. It can be done as below:
val userFinderProps = wireProps[UserFinderActor] //create Props
//This compiles to: Props(classOf[UserFinderActor], theDatabaseAccess, theSecurityFilter)
.withRouter(RoundRobinPool(4)) //change it according requirements
val userFinderActor = system.actorOf(userFinderProps, "userFinder") //create the actor
How about creating actors which depends on ActorRef
s? The simplest way is to
pass them as arguments to the constructor. But how to distinguish two actorRef
s representing two different actors?
They have the same type though.
class DatabaseAccessActor extends Actor { ... }
class SecurityFilterActor extends Actor { ... }
val db: ActorRef = wireActor[DatabaseAccessActor]("db")
val filter: ActorRef = wireActor[SecurityFilterActor]("filter")
class UserFinderActor(databaseAccess: ActorRef, securityFilter: ActorRef) extends Actor {...}
//val userFinder = wireActor[UserFinderActor] wont work here
We can't just call wireActor[UserFinderActor]
because it's not obvious which instance of ActorRef
is for databaseAccess
and which are for securityFilter
. They are both of the same type - ActorRef
.
The solution for it is to use earlier described qualifiers. In above example solution for wiring may look like this:
sealed trait DatabaseAccess //marker type
class DatabaseAccessActor extends Actor { ... }
sealed trait SecurityFilter //marker type
class SecurityFilterActor extends Actor { ... }
val db: ActorRef @@ DatabaseAccess = wireActor[DatabaseAccessActor]("db").taggedWith[DatabaseAccess]
val filter: ActorRef @@ SecurityFilter = wireActor[SecurityFilterActor]("filter").taggedWith[SecurityFilter]
class UserFinderActor(databaseAccess: ActorRef @@ DatabaseAccess, securityFilter: ActorRef @@ SecurityFilter) extends Actor {...}
val userFinder = wireActor[UserFinderActor]
It is also possible to wire an actor using a factory function.
For that, the module provides three additional macros wireAnonymousActorWith
, wireActorWith
and wirePropsWith
.
Their usage is similar to wireWith
(see Factory methods).
For example:
class UserFinderActor(databaseAccess: DatabaseAccess, securityFilter: SecurityFilter) extends Actor { ... }
object UserFinderActor {
def get(databaseAccess: DatabaseAccess) = new UserFinderActor(databaseAccess, new SimpleSecurityFilter())
}
val theUserFinder = wireActorWith(UserFinderActor.get _)("userFinder")
Multi Wiring (wireSet)
Using wireSet
you can obtain a set of multiple instances of the same type. This is done without constructing the set explicitly. All instances of the same type which are found by MacWire are used to construct the set.
Consider the below example. Let's suppose that you want to create a RockBand(musicians: Set[Musician])
object. It's easy to do so using the wireSet
functionality:
trait Musician
class RockBand(musicians: Set[Musician])
trait RockBandModule {
lazy val singer = new Musician {}
lazy val guitarist = new Musician {}
lazy val drummer = new Musician {}
lazy val bassist = new Musician {}
lazy val musicians = wireSet[Musician] // all above musicians will be wired together
// musicians has type Set[Musician]
lazy val rockBand = wire[RockBand]
}
Autowire for cats-effect
Warning: autowire
is an experimental feature, if you have any feedback regarding its usage, let us know! Future releases might break source/binary compatibility. It is available for Scala 2 only for now.
Dependency: "com.softwaremill.macwire" %% "macrosautocats" % "2.6.4"
In case you need to build an instance from some particular instances and factory methods you can leverage autowire
. This feature is intended to integrate with effect-management libraries (currently we support cats-effect).
autowire
takes as an argument a list of arguments which may contain:
- values (e.g.
new A()
) - factory methods (e.g.
C.create _
) - factory methods that return
cats.effect.Resource
orcats.effect.IO
(e.g.C.createIO _
) cats.effect.Resource
(e.g.cats.effect.Resource[IO].pure(new A())
)cats.effect.IO
(e.g.cats.effect.IO.pure(new A())
)
Using the dependencies from the given arguments it creates an instance of the given type. Any missing instances are created using their primary constructor, provided that the dependencies are met. If this is not possible, a compile-time error is reported. In other words, a wireRec
is performed, bypassing the instances search phase.
The result of the wiring is always wrapped in cats.effect.Resource
. For example:
import cats.effect._
class DatabaseAccess()
class SecurityFilter private (databaseAccess: DatabaseAccess)
object SecurityFilter {
def apply(databaseAccess: DatabaseAccess): SecurityFilter = new SecurityFilter(databaseAccess)
}
class UserFinder(databaseAccess: DatabaseAccess, securityFilter: SecurityFilter)
class UserStatusReader(databaseAccess: DatabaseAccess, userFinder: UserFinder)
object UserModule {
import com.softwaremill.macwire.autocats._
val theDatabaseAccess: Resource[IO, DatabaseAccess] = Resource.pure(new DatabaseAccess())
val theUserStatusReader: Resource[IO, UserStatusReader] = autowire[UserStatusReader](theDatabaseAccess)
}
will generate:
[...]
object UserModule {
import com.softwaremill.macwire.autocats._
val theDatabaseAccess: Resource[IO, DatabaseAccess] = Resource.pure(new DatabaseAccess())
val theUserStatusReader: Resource[IO, UserStatusReader] = UserModule.this.theDatabaseAccess.flatMap(
da => Resource.pure[IO, UserStatusReader](new UserStatusReader(da, new UserFinder(da, SecurityFilter.apply(da))))
)
}
Interceptors
Dependency:
"com.softwaremill.macwire" %% "proxy" % "2.6.4"
MacWire contains an implementation of interceptors, which can be applied to class instances in the modules.
Similarly to scopes, the proxy
subproject defines an Interceptor
trait, which has only one method: apply
.
When applied to an instance, it should return an instance of the same class, but with the interceptor applied.
There are two implementations of the Interceptor
trait provided:
NoOpInterceptor
: returns the given instance without changesProxyingInterceptor
: proxies the instance, and returns the proxy. A provided function is called with information on the invocation
Interceptors can be abstract in modules. E.g.:
trait BusinessLogicModule {
lazy val moneyTransferer = transactional(wire[MoneyTransferer])
def transactional: Interceptor
}
During tests, you can then use the NoOpInterceptor
. In production code or integration tests, you can specify a real
interceptor, either by extending the ProxyingInterceptor
trait, or by passing a function to the
ProxyingInterceptor
object:
object MyApplication extends BusinessLogicModule {
lazy val tm = wire[TransactionManager]
lazy val transactional = ProxyingInterceptor { ctx =>
try {
tm.begin()
val result = ctx.proceed()
tm.commit()
result
} catch {
case e: Exception => tm.rollback()
}
}
}
The ctx
is an instance of an InvocationContext
, and contains information on the parameters passed to the method,
the method itself, and the target object. It also allows to proceed with the invocation with the same or changed
parameters.
For more general AOP, e.g. if you want to apply an interceptor to all methods matching a given pointcut expression, you should use AspectJ or an equivalent library. The interceptors that are implemented in MacWire correspond to annotation-based interceptors in Java.
Qualifiers
[!NOTE] While the below works both in Scala 2 & Scala 3, in Scala 3, you can use the built-in opaque types instead.
Sometimes you have multiple objects of the same type that you want to use during wiring. Macwire needs to have some
way of telling the instances apart. As with other things, the answer is: types! Even when not using wire
, it may
be useful to give the instances distinct types, to get compile-time checking.
For that purpose Macwire includes support for tagging via scala-common, which lets you attach tags to instances to qualify them. This is a compile-time only operation, and doesn't affect the runtime. The tags are derived from Miles Sabin's gist.
To bring the tagging into scope, import com.softwaremill.tagging._
.
Using tagging has two sides. In the constructor, when declaring a dependency, you need to declare what tag it needs
to have. You can do this with the _ @@ _
type constructor, or if you prefer another syntax Tagged[_, _]
. The first
type parameter is the type of the dependency, the second is a tag.
The tag can be any type, but usually it is just an empty marker trait.
When defining the available instances, you need to specify which instance has which tag. This can be done with the
taggedWith[_]
method, which returns a tagged instance (A.taggedWith[T]: A @@ T
). Tagged instances can be used
as regular ones, without any constraints.
The wire
macro does not contain any special support for tagging, everything is handled by subtyping. For example:
class Berry()
trait Black
trait Blue
case class Basket(blueberry: Berry @@ Blue, blackberry: Berry @@ Black)
lazy val blueberry = wire[Berry].taggedWith[Blue]
lazy val blackberry = wire[Berry].taggedWith[Black]
lazy val basket = wire[Basket]
Multiple tags can be combined using the andTaggedWith
method. E.g. if we had a berry that is both blue and black:
lazy val blackblueberry = wire[Berry].taggedWith[Black].andTaggedWith[Blue]
The resulting value has type Berry @ (Black with Blue)
and can be used both as a blackberry and as a blueberry.
Development
Debugging
To print debugging information on what MacWire does when looking for values, and what code is generated, set the
macwire.debug
system property. E.g. with SBT, start using sbt -Dmacwire.debug
.
Future development - vote!
Take a look at the available issues. If you'd like to see one developed please vote on it. Or maybe you'll attempt to create a pull request?
Platform and version-specifics
Scala.js
Macwire also works with Scala.js. For an example, see here: Macwire+Scala.js example.
Scala3 support
The Scala 3 version is written to be compatible with Scala 2 where possible. Currently there are a few missing features:
For full list of incompatibilities take a look at tests/src/test/resources/test-cases
and util-tests/src/test/resources/test-cases
.
Other
Commercial Support
We offer commercial support for MacWire and related technologies, as well as development services. Contact us to learn more about our offer!
Copyright
Copyright (C) 2013-2024 SoftwareMill https://softwaremill.com.
More Resourcesto explore the angular.
mail [email protected] to add your project or resources here 🔥.
- 1A toolkit for servicing HTTP requests in Scala
https://github.com/unfiltered/unfiltered
A toolkit for servicing HTTP requests in Scala. Contribute to unfiltered/unfiltered development by creating an account on GitHub.
- 2A Scala DSL for talking with databases with minimum verbosity and maximum type safety
https://github.com/squeryl/squeryl
A Scala DSL for talking with databases with minimum verbosity and maximum type safety - squeryl/squeryl
- 3Apache Flink
https://github.com/apache/flink
Apache Flink. Contribute to apache/flink development by creating an account on GitHub.
- 4Vert.x for Scala
https://github.com/vert-x3/vertx-lang-scala
Vert.x for Scala. Contribute to vert-x3/vertx-lang-scala development by creating an account on GitHub.
- 5Chromaprint/AcoustID audio fingerprinting for the JVM
https://github.com/mgdigital/Chromaprint.scala
Chromaprint/AcoustID audio fingerprinting for the JVM - mgdigital/Chromaprint.scala
- 6A macro library that converts native imperative syntax to scalaz's monadic expressions
https://github.com/ThoughtWorksInc/each
A macro library that converts native imperative syntax to scalaz's monadic expressions - ThoughtWorksInc/each
- 7Incredibly simple DI Scala library.
https://github.com/yakivy/jam
Incredibly simple DI Scala library. Contribute to yakivy/jam development by creating an account on GitHub.
- 8Security library for Play framework 2 in Java and Scala: OAuth, CAS, SAML, OpenID Connect, LDAP, JWT...
https://github.com/pac4j/play-pac4j
Security library for Play framework 2 in Java and Scala: OAuth, CAS, SAML, OpenID Connect, LDAP, JWT... - pac4j/play-pac4j
- 9laserdisc-io/mysql-binlog-stream
https://github.com/laserdisc-io/mysql-binlog-stream
Contribute to laserdisc-io/mysql-binlog-stream development by creating an account on GitHub.
- 10GNU Gettext .po file loader for Scala
https://github.com/xitrum-framework/scaposer
GNU Gettext .po file loader for Scala. Contribute to xitrum-framework/scaposer development by creating an account on GitHub.
- 11Light-weight convenience wrapper around Lucene to simplify complex tasks and add Scala sugar.
https://github.com/outr/lucene4s
Light-weight convenience wrapper around Lucene to simplify complex tasks and add Scala sugar. - outr/lucene4s
- 12Workflow engine for exploration of simulation models using high throughput computing
https://github.com/openmole/openmole
Workflow engine for exploration of simulation models using high throughput computing - openmole/openmole
- 13PostgreSQL protocol support for Finagle
https://github.com/finagle/finagle-postgres
PostgreSQL protocol support for Finagle. Contribute to finagle/finagle-postgres development by creating an account on GitHub.
- 14Simple play module for authenticating against Google
https://github.com/guardian/play-googleauth
Simple play module for authenticating against Google - guardian/play-googleauth
- 15Extensible JOSE library for Scala
https://github.com/blackdoor/jose
Extensible JOSE library for Scala. Contribute to blackdoor/jose development by creating an account on GitHub.
- 16Large off-heap arrays and mmap files for Scala and Java
https://github.com/xerial/larray
Large off-heap arrays and mmap files for Scala and Java - xerial/larray
- 17A scala library for connecting to a redis server, or a cluster of redis nodes using consistent hashing on the client side.
https://github.com/debasishg/scala-redis
A scala library for connecting to a redis server, or a cluster of redis nodes using consistent hashing on the client side. - debasishg/scala-redis
- 18Idiomatic, typesafe, and reactive Scala client for Apache Pulsar
https://github.com/CleverCloud/pulsar4s
Idiomatic, typesafe, and reactive Scala client for Apache Pulsar - CleverCloud/pulsar4s
- 19Purely functional JSON parser and library in scala.
https://github.com/argonaut-io/argonaut
Purely functional JSON parser and library in scala. - argonaut-io/argonaut
- 20Modern Load Testing as Code
https://github.com/gatling/gatling
Modern Load Testing as Code. Contribute to gatling/gatling development by creating an account on GitHub.
- 21A Scala ORM library
https://github.com/kostaskougios/mapperdao
A Scala ORM library. Contribute to kostaskougios/mapperdao development by creating an account on GitHub.
- 22Docker containers for testing in scala
https://github.com/testcontainers/testcontainers-scala
Docker containers for testing in scala. Contribute to testcontainers/testcontainers-scala development by creating an account on GitHub.
- 23A scala diff/patch library for Json
https://github.com/gnieh/diffson
A scala diff/patch library for Json. Contribute to gnieh/diffson development by creating an account on GitHub.
- 24Testing tool in Scala for HTTP JSON API
https://github.com/agourlay/cornichon
Testing tool in Scala for HTTP JSON API. Contribute to agourlay/cornichon development by creating an account on GitHub.
- 25If you don't agree with the data
https://github.com/splink/veto
If you don't agree with the data. Contribute to splink/veto development by creating an account on GitHub.
- 26Software Specifications for Scala
https://github.com/etorreborre/specs2
Software Specifications for Scala. Contribute to etorreborre/specs2 development by creating an account on GitHub.
- 27The Couchbase Monorepo for JVM Clients: Java, Scala, io-core…
https://github.com/couchbase/couchbase-jvm-clients
The Couchbase Monorepo for JVM Clients: Java, Scala, io-core… - couchbase/couchbase-jvm-clients
- 28Salat is a simple serialization library for case classes.
https://github.com/salat/salat
Salat is a simple serialization library for case classes. - salat/salat
- 29Practical effect composition library based on abstract wrapping type and the free monad
https://github.com/ISCPIF/freedsl
Practical effect composition library based on abstract wrapping type and the free monad - ISCPIF/freedsl
- 30SevenZip library for Scala, easy to use.
https://github.com/gonearewe/SevenZ4S
SevenZip library for Scala, easy to use. . Contribute to gonearewe/SevenZ4S development by creating an account on GitHub.
- 31The super light testing library for Scala and Scala.js
https://github.com/monix/minitest
The super light testing library for Scala and Scala.js - monix/minitest
- 32A module that provides OAuth, OAuth2 and OpenID authentication for Play Framework applications
https://github.com/jaliss/securesocial
A module that provides OAuth, OAuth2 and OpenID authentication for Play Framework applications - jaliss/securesocial
- 33Compile-time Language Integrated Queries for Scala
https://github.com/zio/zio-quill
Compile-time Language Integrated Queries for Scala - zio/zio-quill
- 34Scala Scripting
https://github.com/com-lihaoyi/Ammonite
Scala Scripting. Contribute to com-lihaoyi/Ammonite development by creating an account on GitHub.
- 35Slick (Scala Language Integrated Connection Kit) is a modern database query and access library for Scala
https://github.com/slick/slick
Slick (Scala Language Integrated Connection Kit) is a modern database query and access library for Scala - slick/slick
- 36Property-based testing for Scala
https://github.com/typelevel/scalacheck
Property-based testing for Scala. Contribute to typelevel/scalacheck development by creating an account on GitHub.
- 37Simpler DynamoDB access for Scala
https://github.com/scanamo/scanamo
Simpler DynamoDB access for Scala. Contribute to scanamo/scanamo development by creating an account on GitHub.
- 38Type-Safe framework for defining, modifying, and querying SQL databases
https://github.com/outr/scalarelational
Type-Safe framework for defining, modifying, and querying SQL databases - outr/scalarelational
- 39ScalaFX simplifies creation of JavaFX-based user interfaces in Scala
https://github.com/scalafx/scalafx
ScalaFX simplifies creation of JavaFX-based user interfaces in Scala - scalafx/scalafx
- 40Performant database access in Scala
https://github.com/lucidsoftware/relate
Performant database access in Scala. Contribute to lucidsoftware/relate development by creating an account on GitHub.
- 41Scala library for boilerplate-free validation
https://github.com/krzemin/octopus
Scala library for boilerplate-free validation. Contribute to krzemin/octopus development by creating an account on GitHub.
- 42Connect a Scala REPL to running JVM processes without any prior setup
https://github.com/xitrum-framework/scalive
Connect a Scala REPL to running JVM processes without any prior setup - xitrum-framework/scalive
- 43A ZIO-based redis client
https://github.com/zio/zio-redis
A ZIO-based redis client. Contribute to zio/zio-redis development by creating an account on GitHub.
- 44Tiny Scala high-performance, async web framework, inspired by Sinatra
https://github.com/scalatra/scalatra
Tiny Scala high-performance, async web framework, inspired by Sinatra - scalatra/scalatra
- 45Reactive data-binding for Scala
https://github.com/ThoughtWorksInc/Binding.scala
Reactive data-binding for Scala. Contribute to ThoughtWorksInc/Binding.scala development by creating an account on GitHub.
- 46The Anorm database library
https://github.com/playframework/anorm
The Anorm database library. Contribute to playframework/anorm development by creating an account on GitHub.
- 47A module for the Play Framework to build highly modular applications
https://github.com/splink/pagelets
A module for the Play Framework to build highly modular applications - splink/pagelets
- 48I/O and Microservice library for Scala
https://github.com/tumblr/colossus
I/O and Microservice library for Scala. Contribute to tumblr/colossus development by creating an account on GitHub.
- 49Scala library to sign HTTP requests to AWS services.
https://github.com/ticofab/aws-request-signer
Scala library to sign HTTP requests to AWS services. - ticofab/aws-request-signer
- 50Next generation user interface and application development in Scala and Scala.js for web, mobile, and desktop.
https://github.com/outr/youi
Next generation user interface and application development in Scala and Scala.js for web, mobile, and desktop. - outr/youi
- 51Statistical Machine Intelligence & Learning Engine
https://github.com/haifengl/smile
Statistical Machine Intelligence & Learning Engine - haifengl/smile
- 52Microbenchmarking and performance regression testing framework for the JVM platform.
https://github.com/scalameter/scalameter
Microbenchmarking and performance regression testing framework for the JVM platform. - scalameter/scalameter
- 53A testing tool for Scala and Java developers
https://github.com/scalatest/scalatest
A testing tool for Scala and Java developers. Contribute to scalatest/scalatest development by creating an account on GitHub.
- 54:monorail: "Scala on Rails" - A full-stack web app framework for rapid development in Scala
https://github.com/skinny-framework/skinny-framework
:monorail: "Scala on Rails" - A full-stack web app framework for rapid development in Scala - skinny-framework/skinny-framework
- 55Molecule translates custom Scala code to database queries for multiple databases.
https://github.com/scalamolecule/molecule
Molecule translates custom Scala code to database queries for multiple databases. - scalamolecule/molecule
- 56Cryptographic primitives for Scala
https://github.com/input-output-hk/scrypto
Cryptographic primitives for Scala. Contribute to input-output-hk/scrypto development by creating an account on GitHub.
- 57A lightweight framework for writing REST services in Scala.
https://github.com/mesosphere/chaos
A lightweight framework for writing REST services in Scala. - mesosphere/chaos
- 58Async and clustered Scala web framework and HTTP(S) server
https://github.com/xitrum-framework/xitrum
Async and clustered Scala web framework and HTTP(S) server - xitrum-framework/xitrum
- 59A distributed tracing extension for Akka. Provides integration with Play framework, Spray and Akka HTTP.
https://github.com/levkhomich/akka-tracing
A distributed tracing extension for Akka. Provides integration with Play framework, Spray and Akka HTTP. - levkhomich/akka-tracing
- 60A simple FRP library and a web UI framework built on it
https://github.com/nafg/reactive
A simple FRP library and a web UI framework built on it - nafg/reactive
- 61Facebook's React on Scala.JS
https://github.com/japgolly/scalajs-react
Facebook's React on Scala.JS. Contribute to japgolly/scalajs-react development by creating an account on GitHub.
- 62Figaro Programming Language and Core Libraries
https://github.com/charles-river-analytics/figaro
Figaro Programming Language and Core Libraries. Contribute to charles-river-analytics/figaro development by creating an account on GitHub.
- 63Optimus is a mathematical programming library for Scala.
https://github.com/vagmcs/Optimus
Optimus is a mathematical programming library for Scala. - vagmcs/Optimus
- 64Fast JSON parser/generator for Scala
https://github.com/gzoller/ScalaJack
Fast JSON parser/generator for Scala. Contribute to gzoller/ScalaJack development by creating an account on GitHub.
- 65Apache Spark - A unified analytics engine for large-scale data processing
https://github.com/apache/spark
Apache Spark - A unified analytics engine for large-scale data processing - apache/spark
- 66scala SQL api
https://github.com/wangzaixiang/scala-sql
scala SQL api. Contribute to wangzaixiang/scala-sql development by creating an account on GitHub.
- 67Scala support library for integrating the JSON API spec with Spray, Play! or Circe
https://github.com/scala-jsonapi/scala-jsonapi
Scala support library for integrating the JSON API spec with Spray, Play! or Circe - scala-jsonapi/scala-jsonapi
- 68Scala code generator for Avro schemas.
https://github.com/malcolmgreaves/avro-codegen
Scala code generator for Avro schemas. Contribute to malcolmgreaves/avro-codegen development by creating an account on GitHub.
- 69Protocol buffer compiler for Scala.
https://github.com/scalapb/ScalaPB
Protocol buffer compiler for Scala. Contribute to scalapb/ScalaPB development by creating an account on GitHub.
- 70Functional JDBC layer for Scala.
https://github.com/tpolecat/doobie
Functional JDBC layer for Scala. Contribute to tpolecat/doobie development by creating an account on GitHub.
- 71CPU and GPU-accelerated Machine Learning Library
https://github.com/BIDData/BIDMach
CPU and GPU-accelerated Machine Learning Library. Contribute to BIDData/BIDMach development by creating an account on GitHub.
- 72Graph for Scala is intended to provide basic graph functionality seamlessly fitting into the Scala Collection Library. Like the well known members of scala.collection, Graph for Scala is an in-memory graph library aiming at editing and traversing graphs, finding cycles etc. in a user-friendly way.
https://github.com/scala-graph/scala-graph
Graph for Scala is intended to provide basic graph functionality seamlessly fitting into the Scala Collection Library. Like the well known members of scala.collection, Graph for Scala is an in-memo...
- 73Axle Domain Specific Language for Scientific Cloud Computing and Visualization
https://github.com/axlelang/axle
Axle Domain Specific Language for Scientific Cloud Computing and Visualization - axlelang/axle
- 74Lightweight and fast serialization library for Scala 2/3 based on Protocol Buffers with macros
https://github.com/zero-deps/proto
Lightweight and fast serialization library for Scala 2/3 based on Protocol Buffers with macros - zero-deps/proto
- 75Scala Uniquely Bound Classes Under Traits
https://github.com/dickwall/subcut
Scala Uniquely Bound Classes Under Traits. Contribute to dickwall/subcut development by creating an account on GitHub.
- 76Highly available distributed strong eventual consistent and sequentially consistent storage with feeds, sorting and search
https://github.com/zero-deps/kvs
Highly available distributed strong eventual consistent and sequentially consistent storage with feeds, sorting and search - zero-deps/kvs
- 77Single Page Applications running on the server side.
https://github.com/fomkin/korolev
Single Page Applications running on the server side. - fomkin/korolev
- 78A foundational framework for distributed programming.
https://github.com/reactors-io/reactors
A foundational framework for distributed programming. - reactors-io/reactors
- 79A dimensional analysis library based on dependent types
https://github.com/to-ithaca/libra
A dimensional analysis library based on dependent types - to-ithaca/libra
- 80CSV handling library for Scala
https://github.com/nrinaudo/kantan.csv
CSV handling library for Scala. Contribute to nrinaudo/kantan.csv development by creating an account on GitHub.
- 81MessagePack serializer implementation for Scala / msgpack.org[Scala]
https://github.com/msgpack/msgpack-scala
MessagePack serializer implementation for Scala / msgpack.org[Scala] - msgpack/msgpack-scala
- 82uPickle: a simple, fast, dependency-free JSON & Binary (MessagePack) serialization library for Scala
https://github.com/com-lihaoyi/upickle
uPickle: a simple, fast, dependency-free JSON & Binary (MessagePack) serialization library for Scala - com-lihaoyi/upickle
- 83a simple Scala CLI parsing library
https://github.com/scallop/scallop
a simple Scala CLI parsing library. Contribute to scallop/scallop development by creating an account on GitHub.
- 84Add-on module for Jackson (https://github.com/FasterXML/jackson) to support Scala-specific datatypes
https://github.com/FasterXML/jackson-module-scala
Add-on module for Jackson (https://github.com/FasterXML/jackson) to support Scala-specific datatypes - FasterXML/jackson-module-scala
- 85Type-safe data migration tool for Slick, Git and beyond.
https://github.com/lastland/scala-forklift
Type-safe data migration tool for Slick, Git and beyond. - lastland/scala-forklift
- 86A tidy SQL-based DB access library for Scala developers. This library naturally wraps JDBC APIs and provides you easy-to-use APIs.
https://github.com/scalikejdbc/scalikejdbc
A tidy SQL-based DB access library for Scala developers. This library naturally wraps JDBC APIs and provides you easy-to-use APIs. - scalikejdbc/scalikejdbc
- 87Scala compiler plugin that acts like GNU xgettext command to extract i18n strings in Scala source code files to Gettext .po file
https://github.com/xitrum-framework/scala-xgettext
Scala compiler plugin that acts like GNU xgettext command to extract i18n strings in Scala source code files to Gettext .po file - xitrum-framework/scala-xgettext
- 88REScala - distributed and reactive programming embedded in OO and FP programs.
https://github.com/rescala-lang/REScala
REScala - distributed and reactive programming embedded in OO and FP programs. - rescala-lang/REScala
- 89Scala classpath scanner
https://github.com/xitrum-framework/sclasner
Scala classpath scanner. Contribute to xitrum-framework/sclasner development by creating an account on GitHub.
- 90Iteratees for Cats
https://github.com/travisbrown/iteratee
Iteratees for Cats. Contribute to travisbrown/iteratee development by creating an account on GitHub.
- 91Fast, secure JSON library with tight ZIO integration.
https://github.com/zio/zio-json
Fast, secure JSON library with tight ZIO integration. - zio/zio-json
- 92Schema registry for CSV, TSV, JSON, AVRO and Parquet schema. Supports schema inference and GraphQL API.
https://github.com/indix/schemer
Schema registry for CSV, TSV, JSON, AVRO and Parquet schema. Supports schema inference and GraphQL API. - indix/schemer
- 93Play2.x Authentication and Authorization module
https://github.com/t2v/play2-auth
Play2.x Authentication and Authorization module. Contribute to t2v/play2-auth development by creating an account on GitHub.
- 94Jawn is for parsing jay-sawn (JSON)
https://github.com/typelevel/jawn
Jawn is for parsing jay-sawn (JSON). Contribute to typelevel/jawn development by creating an account on GitHub.
- 95An ONNX (Open Neural Network eXchange) API and backend for typeful, functional deep learning and classical machine learning in Scala 3
https://github.com/EmergentOrder/onnx-scala
An ONNX (Open Neural Network eXchange) API and backend for typeful, functional deep learning and classical machine learning in Scala 3 - EmergentOrder/onnx-scala
- 96Labeled records for Scala based on structural refinement types and macros.
https://github.com/scala-records/scala-records
Labeled records for Scala based on structural refinement types and macros. - scala-records/scala-records
- 97Breeze is a numerical processing library for Scala.
https://github.com/scalanlp/breeze
Breeze is a numerical processing library for Scala. - scalanlp/breeze
- 98Scala Library for Reading Flat File Data (CSV/TSV/XLS/XLSX)
https://github.com/frugalmechanic/fm-flatfile
Scala Library for Reading Flat File Data (CSV/TSV/XLS/XLSX) - frugalmechanic/fm-flatfile
- 99Platform to build distributed, scalable, enterprise-wide business applications
https://github.com/annetteplatform/annette
Platform to build distributed, scalable, enterprise-wide business applications - annetteplatform/annette
- 100Cassovary is a simple big graph processing library for the JVM
https://github.com/twitter/cassovary
Cassovary is a simple big graph processing library for the JVM - twitter/cassovary
- 101A concurrent reactive programming framework.
https://github.com/storm-enroute/reactors
A concurrent reactive programming framework. Contribute to storm-enroute/reactors development by creating an account on GitHub.
- 102Library to register and lookup actors by names in an Akka cluster
https://github.com/xitrum-framework/glokka
Library to register and lookup actors by names in an Akka cluster - xitrum-framework/glokka
- 103:cake: doddle-model: machine learning in Scala.
https://github.com/picnicml/doddle-model
:cake: doddle-model: machine learning in Scala. Contribute to picnicml/doddle-model development by creating an account on GitHub.
- 104A Scala API for Apache Beam and Google Cloud Dataflow.
https://github.com/spotify/scio
A Scala API for Apache Beam and Google Cloud Dataflow. - spotify/scio
- 105A mini Scala utility library
https://github.com/scala-hamsters/hamsters
A mini Scala utility library. Contribute to scala-hamsters/hamsters development by creating an account on GitHub.
- 106Powerful new number types and numeric abstractions for Scala.
https://github.com/typelevel/spire
Powerful new number types and numeric abstractions for Scala. - typelevel/spire
- 107A Persistence Framework for Scala and NoSQL
https://github.com/longevityframework/longevity
A Persistence Framework for Scala and NoSQL. Contribute to longevityframework/longevity development by creating an account on GitHub.
- 108Async lightweight Scala web framework
https://github.com/dvarelap/peregrine
Async lightweight Scala web framework. Contribute to dvarelap/peregrine development by creating an account on GitHub.
- 109CSV Reader/Writer for Scala
https://github.com/tototoshi/scala-csv
CSV Reader/Writer for Scala. Contribute to tototoshi/scala-csv development by creating an account on GitHub.
- 110A Thrift parser/generator
https://github.com/twitter/scrooge
A Thrift parser/generator. Contribute to twitter/scrooge development by creating an account on GitHub.
- 111N-dimensional / multi-dimensional arrays (tensors) in Scala 3. Think NumPy ndarray / PyTorch Tensor but type-safe over shapes, array/axis labels & numeric data types
https://github.com/SciScala/NDScala
N-dimensional / multi-dimensional arrays (tensors) in Scala 3. Think NumPy ndarray / PyTorch Tensor but type-safe over shapes, array/axis labels & numeric data types - SciScala/NDScala
- 112A JSR-310 port of nscala_time
https://github.com/chronoscala/chronoscala
A JSR-310 port of nscala_time. Contribute to chronoscala/chronoscala development by creating an account on GitHub.
- 113Lightweight Scala Dependency Injection Library
https://github.com/scaldi/scaldi
Lightweight Scala Dependency Injection Library. Contribute to scaldi/scaldi development by creating an account on GitHub.
- 114A fault tolerant, protocol-agnostic RPC system
https://github.com/twitter/finagle
A fault tolerant, protocol-agnostic RPC system. Contribute to twitter/finagle development by creating an account on GitHub.
- 115Scala library for accessing various file, batch systems, job schedulers and grid middlewares.
https://github.com/openmole/gridscale
Scala library for accessing various file, batch systems, job schedulers and grid middlewares. - openmole/gridscale
- 116JVM - Java, Kotlin, Scala image processing library
https://github.com/sksamuel/scrimage
JVM - Java, Kotlin, Scala image processing library - sksamuel/scrimage
- 117A group of neural-network libraries for functional and mainstream languages
https://github.com/mrdimosthenis/Synapses
A group of neural-network libraries for functional and mainstream languages - mrdimosthenis/Synapses
- 118Alpakka Kafka connector - Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka.
https://github.com/akka/alpakka-kafka
Alpakka Kafka connector - Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka. - akka/alpakka-kafka
- 119Productivity-oriented collection of lightweight fancy stuff for Scala toolchain
https://github.com/7mind/izumi
Productivity-oriented collection of lightweight fancy stuff for Scala toolchain - 7mind/izumi
- 120Real Time Analytics and Data Pipelines based on Spark Streaming
https://github.com/Stratio/sparta
Real Time Analytics and Data Pipelines based on Spark Streaming - Stratio/sparta
- 121C4E, a JVM friendly library written in Scala for both local and distributed (Spark) Clustering.
https://github.com/Clustering4Ever/Clustering4Ever
C4E, a JVM friendly library written in Scala for both local and distributed (Spark) Clustering. - Clustering4Ever/Clustering4Ever
- 122Scala extensions for Google Guice
https://github.com/codingwell/scala-guice
Scala extensions for Google Guice. Contribute to codingwell/scala-guice development by creating an account on GitHub.
- 123Purely functional genetic algorithms for multi-objective optimisation
https://github.com/openmole/mgo
Purely functional genetic algorithms for multi-objective optimisation - openmole/mgo
- 124A composable command-line parser for Scala.
https://github.com/bkirwi/decline
A composable command-line parser for Scala. Contribute to bkirwi/decline development by creating an account on GitHub.
- 125ABANDONED Pure Scala serialization library with annotations
https://github.com/fomkin/pushka
ABANDONED Pure Scala serialization library with annotations - fomkin/pushka
- 126Modify deeply nested case class fields
https://github.com/softwaremill/quicklens
Modify deeply nested case class fields. Contribute to softwaremill/quicklens development by creating an account on GitHub.
- 127Non-blocking, ultra-fast Scala Redis client built on top of Akka IO, used in production at Livestream
https://github.com/Livestream/scredis
Non-blocking, ultra-fast Scala Redis client built on top of Akka IO, used in production at Livestream - Livestream/scredis
- 128RxScala – Reactive Extensions for Scala – a library for composing asynchronous and event-based programs using observable sequences
https://github.com/ReactiveX/RxScala
RxScala – Reactive Extensions for Scala – a library for composing asynchronous and event-based programs using observable sequences - ReactiveX/RxScala
- 129Asynchronous, Reactive Programming for Scala and Scala.js.
https://github.com/monix/monix
Asynchronous, Reactive Programming for Scala and Scala.js. - monix/monix
- 130Easy way to create Free Monad using Scala macros with first-class Intellij support.
https://github.com/Thangiee/Freasy-Monad
Easy way to create Free Monad using Scala macros with first-class Intellij support. - Thangiee/Freasy-Monad
- 131Eff monad for cats - https://atnos-org.github.io/eff
https://github.com/atnos-org/eff
Eff monad for cats - https://atnos-org.github.io/eff - atnos-org/eff
- 132The missing MatPlotLib for Scala + Spark
https://github.com/vegas-viz/Vegas
The missing MatPlotLib for Scala + Spark. Contribute to vegas-viz/Vegas development by creating an account on GitHub.
- 133Scala extensions for the Kryo serialization library
https://github.com/twitter/chill
Scala extensions for the Kryo serialization library - twitter/chill
- 134Minimal, type-safe RPC Scala library.
https://github.com/yakivy/poppet
Minimal, type-safe RPC Scala library. Contribute to yakivy/poppet development by creating an account on GitHub.
- 135Reactive Microservices for the JVM
https://github.com/lagom/lagom
Reactive Microservices for the JVM. Contribute to lagom/lagom development by creating an account on GitHub.
- 136A scala extension for Project Reactor's Flux and Mono
https://github.com/spring-attic/reactor-scala-extensions
A scala extension for Project Reactor's Flux and Mono - spring-attic/reactor-scala-extensions
- 137Scala testing library with actionable errors and extensible APIs
https://github.com/scalameta/munit
Scala testing library with actionable errors and extensible APIs - scalameta/munit
- 138Scala wrapper for SnakeYAML
https://github.com/jcazevedo/moultingyaml
Scala wrapper for SnakeYAML. Contribute to jcazevedo/moultingyaml development by creating an account on GitHub.
- 139SynapseGrid is a framework for constructing dynamic low latency data flow systems.
https://github.com/Primetalk/SynapseGrid
SynapseGrid is a framework for constructing dynamic low latency data flow systems. - Primetalk/SynapseGrid
- 140Distributed NoSQL Database
https://github.com/stephenmcd/curiodb
Distributed NoSQL Database. Contribute to stephenmcd/curiodb development by creating an account on GitHub.
- 141Abstract Algebra for Scala
https://github.com/twitter/algebird
Abstract Algebra for Scala. Contribute to twitter/algebird development by creating an account on GitHub.
- 142Spark package to "plug" holes in data using SQL based rules ⚡️ 🔌
https://github.com/indix/sparkplug
Spark package to "plug" holes in data using SQL based rules ⚡️ 🔌 - GitHub - indix/sparkplug: Spark package to "plug" holes in data using SQL based rules ⚡️ 🔌
- 143A simple testing framework for Scala
https://github.com/com-lihaoyi/utest
A simple testing framework for Scala. Contribute to com-lihaoyi/utest development by creating an account on GitHub.
- 144Scalable Image Analysis and Shape Modelling
https://github.com/unibas-gravis/scalismo
Scalable Image Analysis and Shape Modelling. Contribute to unibas-gravis/scalismo development by creating an account on GitHub.
- 145Web-based notebook that enables data-driven, interactive data analytics and collaborative documents with SQL, Scala and more.
https://github.com/apache/zeppelin
Web-based notebook that enables data-driven, interactive data analytics and collaborative documents with SQL, Scala and more. - apache/zeppelin
- 146Mutation testing for Scala
https://github.com/stryker-mutator/stryker4s
Mutation testing for Scala. Contribute to stryker-mutator/stryker4s development by creating an account on GitHub.
- 147Streaming MapReduce with Scalding and Storm
https://github.com/twitter/summingbird
Streaming MapReduce with Scalding and Storm. Contribute to twitter/summingbird development by creating an account on GitHub.
- 148A library that toggles Scala code at compile-time, like #if in C/C++
https://github.com/ThoughtWorksInc/enableIf.scala
A library that toggles Scala code at compile-time, like #if in C/C++ - ThoughtWorksInc/enableIf.scala
- 149Casbah is now officially end-of-life (EOL).
https://github.com/mongodb/casbah
Casbah is now officially end-of-life (EOL). Contribute to mongodb/casbah development by creating an account on GitHub.
- 150Build highly concurrent, distributed, and resilient message-driven applications on the JVM
https://github.com/akka/akka
Build highly concurrent, distributed, and resilient message-driven applications on the JVM - akka/akka
- 151A framework to create embedded Domain-Specific Languages in Scala
https://github.com/ThoughtWorksInc/Dsl.scala
A framework to create embedded Domain-Specific Languages in Scala - ThoughtWorksInc/Dsl.scala
- 152Scala library for boilerplate-free, type-safe data transformations
https://github.com/scalalandio/chimney
Scala library for boilerplate-free, type-safe data transformations - scalalandio/chimney
- 153Interactive and Reactive Data Science using Scala and Spark.
https://github.com/spark-notebook/spark-notebook
Interactive and Reactive Data Science using Scala and Spark. - spark-notebook/spark-notebook
- 154TensorFlow API for the Scala Programming Language
https://github.com/eaplatanios/tensorflow_scala
TensorFlow API for the Scala Programming Language. Contribute to eaplatanios/tensorflow_scala development by creating an account on GitHub.
- 155numsca is numpy for scala
https://github.com/botkop/numsca
numsca is numpy for scala. Contribute to botkop/numsca development by creating an account on GitHub.
- 156A cohesive & pragmatic framework of FP centric Scala libraries
https://github.com/frees-io/freestyle
A cohesive & pragmatic framework of FP centric Scala libraries - frees-io/freestyle
- 157Build software better, together
https://github.com/Sciss/ScalaCollider
GitHub is where people build software. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects.
- 158A lightweight, clean and simple JSON implementation in Scala
https://github.com/spray/spray-json
A lightweight, clean and simple JSON implementation in Scala - spray/spray-json
- 159A new Scala wrapper for Joda Time based on scala-time
https://github.com/nscala-time/nscala-time
A new Scala wrapper for Joda Time based on scala-time - nscala-time/nscala-time
- 160Convenient and performant logging library for Scala wrapping SLF4J.
https://github.com/lightbend-labs/scala-logging
Convenient and performant logging library for Scala wrapping SLF4J. - lightbend-labs/scala-logging
- 161Blindsight is a Scala logging API with DSL based structured logging, fluent logging, semantic logging, flow logging, and context aware logging.
https://github.com/tersesystems/blindsight
Blindsight is a Scala logging API with DSL based structured logging, fluent logging, semantic logging, flow logging, and context aware logging. - tersesystems/blindsight
- 162Command Line Interface Scala Toolkit
https://github.com/backuity/clist
Command Line Interface Scala Toolkit. Contribute to backuity/clist development by creating an account on GitHub.
- 163command line options parsing for Scala
https://github.com/scopt/scopt
command line options parsing for Scala. Contribute to scopt/scopt development by creating an account on GitHub.
- 164Schema safe, type-safe, reactive Scala driver for Cassandra/Datastax Enterprise
https://github.com/outworkers/phantom
Schema safe, type-safe, reactive Scala driver for Cassandra/Datastax Enterprise - outworkers/phantom
- 165A Scala API for Cascading
https://github.com/twitter/scalding
A Scala API for Cascading. Contribute to twitter/scalding development by creating an account on GitHub.
- 166The fastest logging library in the world. Built from scratch in Scala and programmatically configurable.
https://github.com/outr/scribe
The fastest logging library in the world. Built from scratch in Scala and programmatically configurable. - outr/scribe
- 167State of the Art Natural Language Processing
https://github.com/JohnSnowLabs/spark-nlp
State of the Art Natural Language Processing. Contribute to JohnSnowLabs/spark-nlp development by creating an account on GitHub.
- 168Essential Building Blocks for Scala
https://github.com/wvlet/airframe
Essential Building Blocks for Scala. Contribute to wvlet/airframe development by creating an account on GitHub.
- 169ZIO — A type-safe, composable library for async and concurrent programming in Scala
https://github.com/zio/zio
ZIO — A type-safe, composable library for async and concurrent programming in Scala - zio/zio
- 170Lightweight, modular, and extensible library for functional programming.
https://github.com/typelevel/cats
Lightweight, modular, and extensible library for functional programming. - typelevel/cats
- 171Scala validation library
https://github.com/jap-company/fields
Scala validation library. Contribute to jap-company/fields development by creating an account on GitHub.
- 172Cask: a Scala HTTP micro-framework
https://github.com/com-lihaoyi/cask
Cask: a Scala HTTP micro-framework. Contribute to com-lihaoyi/cask development by creating an account on GitHub.
- 173Slick extensions for PostgreSQL
https://github.com/tminglei/slick-pg
Slick extensions for PostgreSQL. Contribute to tminglei/slick-pg development by creating an account on GitHub.
- 174First class syntax support for type classes in Scala
https://github.com/typelevel/simulacrum
First class syntax support for type classes in Scala - typelevel/simulacrum
- 175Persist-Json, a Fast Json Parser Written in Scala
https://github.com/nestorpersist/json
Persist-Json, a Fast Json Parser Written in Scala. Contribute to nestorpersist/json development by creating an account on GitHub.
- 176Refinement types for Scala
https://github.com/fthomas/refined
Refinement types for Scala. Contribute to fthomas/refined development by creating an account on GitHub.
- 177Generic programming for Scala
https://github.com/milessabin/shapeless
Generic programming for Scala. Contribute to milessabin/shapeless development by creating an account on GitHub.
- 178Lift Framework
https://github.com/lift/framework
Lift Framework. Contribute to lift/framework development by creating an account on GitHub.
- 179Fast, testable, Scala services built on TwitterServer and Finagle
https://github.com/twitter/finatra
Fast, testable, Scala services built on TwitterServer and Finagle - twitter/finatra
- 180Build software better, together
https://github.com/wireapp/wire-signals
GitHub is where people build software. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects.
- 181The Opinionated RabbitMQ Library for Scala and Akka
https://github.com/SpinGo/op-rabbit
The Opinionated RabbitMQ Library for Scala and Akka - SpinGo/op-rabbit
- 182JSON typeclasses that know the difference between null and absent fields
https://github.com/nrktkt/ninny-json
JSON typeclasses that know the difference between null and absent fields - nrktkt/ninny-json
- 183Scala macros for compile-time generation of safe and ultra-fast JSON codecs + circe booster
https://github.com/plokhotnyuk/jsoniter-scala
Scala macros for compile-time generation of safe and ultra-fast JSON codecs + circe booster - plokhotnyuk/jsoniter-scala
- 184LoMRF is an open-source implementation of Markov Logic Networks
https://github.com/anskarl/LoMRF
LoMRF is an open-source implementation of Markov Logic Networks - anskarl/LoMRF
- 185property based testing library for Scala
https://github.com/scalaprops/scalaprops
property based testing library for Scala. Contribute to scalaprops/scalaprops development by creating an account on GitHub.
- 186Yet another JSON library for Scala
https://github.com/circe/circe
Yet another JSON library for Scala. Contribute to circe/circe development by creating an account on GitHub.
- 187Native Scala mocking framework
https://github.com/paulbutcher/ScalaMock
Native Scala mocking framework. Contribute to paulbutcher/ScalaMock development by creating an account on GitHub.
- 188OAuth 2.0 server-side implementation written in Scala
https://github.com/nulab/scala-oauth2-provider
OAuth 2.0 server-side implementation written in Scala - nulab/scala-oauth2-provider
- 189A small, convenient, dependency-free library for command-line argument parsing in Scala
https://github.com/com-lihaoyi/mainargs
A small, convenient, dependency-free library for command-line argument parsing in Scala - com-lihaoyi/mainargs
- 190Scala + Druid: Scruid. A library that allows you to compose queries in Scala, and parse the result back into typesafe classes.
https://github.com/ing-bank/scruid
Scala + Druid: Scruid. A library that allows you to compose queries in Scala, and parse the result back into typesafe classes. - ing-bank/scruid
- 191akka-persistence-gcp-datastore is a journal and snapshot store plugin for akka-persistence using google cloud firestore in datastore mode.
https://github.com/innFactory/akka-persistence-gcp-datastore
akka-persistence-gcp-datastore is a journal and snapshot store plugin for akka-persistence using google cloud firestore in datastore mode. - GitHub - innFactory/akka-persistence-gcp-datastore: akk...
- 192Mirror of Apache Kafka
https://github.com/apache/kafka
Mirror of Apache Kafka. Contribute to apache/kafka development by creating an account on GitHub.
- 193:leaves: Non-blocking, Reactive MongoDB Driver for Scala
https://github.com/ReactiveMongo/ReactiveMongo
:leaves: Non-blocking, Reactive MongoDB Driver for Scala - ReactiveMongo/ReactiveMongo
- 194Scala GraphQL implementation
https://github.com/sangria-graphql/sangria
Scala GraphQL implementation. Contribute to sangria-graphql/sangria development by creating an account on GitHub.
- 195Functional, stream-based CSV processor for Scala
https://github.com/fingo/spata
Functional, stream-based CSV processor for Scala. Contribute to fingo/spata development by creating an account on GitHub.
- 196ActiveRecord-like ORM library for Scala
https://github.com/aselab/scala-activerecord
ActiveRecord-like ORM library for Scala. Contribute to aselab/scala-activerecord development by creating an account on GitHub.
- 197A Future-free Fs2 native pure FP Redis client
https://github.com/laserdisc-io/laserdisc
A Future-free Fs2 native pure FP Redis client. Contribute to laserdisc-io/laserdisc development by creating an account on GitHub.
- 198Scala framework for building beautiful and maintainable web applications.
https://github.com/UdashFramework/udash-core
Scala framework for building beautiful and maintainable web applications. - UdashFramework/udash-core
- 199Main Portal page for the Jackson project
https://github.com/FasterXML/jackson
Main Portal page for the Jackson project. Contribute to FasterXML/jackson development by creating an account on GitHub.
- 200Library to read, analyze, transform and generate Scala programs
https://github.com/scalameta/scalameta
Library to read, analyze, transform and generate Scala programs - scalameta/scalameta
- 201Compositional, streaming I/O library for Scala
https://github.com/typelevel/fs2
Compositional, streaming I/O library for Scala. Contribute to typelevel/fs2 development by creating an account on GitHub.
- 202The Community Maintained High Velocity Web Framework For Java and Scala.
https://github.com/playframework/playframework
The Community Maintained High Velocity Web Framework For Java and Scala. - playframework/playframework
- 203Scala lightweight, type-safe, asynchronous driver for neo4j
https://github.com/neotypes/neotypes
Scala lightweight, type-safe, asynchronous driver for neo4j - GitHub - neotypes/neotypes: Scala lightweight, type-safe, asynchronous driver for neo4j
- 204Type-safe general-cryptography library - https://jmcardon.github.io/tsec/
https://github.com/jmcardon/tsec
Type-safe general-cryptography library - https://jmcardon.github.io/tsec/ - jmcardon/tsec
- 205JSON library
https://github.com/json4s/json4s
JSON library. Contribute to json4s/json4s development by creating an account on GitHub.
- 206Web & mobile client-side akka-http sessions, with optional JWT support
https://github.com/softwaremill/akka-http-session
Web & mobile client-side akka-http sessions, with optional JWT support - softwaremill/akka-http-session
- 207Lightweight and Nonintrusive Scala Dependency Injection Library
https://github.com/softwaremill/macwire
Lightweight and Nonintrusive Scala Dependency Injection Library - softwaremill/macwire
- 208Rings: efficient JVM library for polynomial rings
https://github.com/PoslavskySV/rings
Rings: efficient JVM library for polynomial rings. Contribute to PoslavskySV/rings development by creating an account on GitHub.
- 209Typesafe, purely functional Computational Intelligence
https://github.com/ciren/cilib
Typesafe, purely functional Computational Intelligence - ciren/cilib
- 210An experimental library for Functional Reactive Programming in Scala
https://github.com/lihaoyi/scala.rx
An experimental library for Functional Reactive Programming in Scala - lihaoyi/scala.rx
- 211New ReactiveCouchbase driver using reactive-streams
https://github.com/ReactiveCouchbase/reactivecouchbase-rs-core
New ReactiveCouchbase driver using reactive-streams - ReactiveCouchbase/reactivecouchbase-rs-core
- 212Simple, safe and intuitive Scala I/O
https://github.com/pathikrit/better-files
Simple, safe and intuitive Scala I/O. Contribute to pathikrit/better-files development by creating an account on GitHub.
- 213Reactive type-safe Scala driver for SQL databases
https://github.com/outworkers/morpheus
Reactive type-safe Scala driver for SQL databases. Contribute to outworkers/morpheus development by creating an account on GitHub.
- 214Lamma schedule generator for Scala is a professional schedule generation library for periodic schedules like fixed income coupon payment, equity deravitive fixing date generation etc.
https://github.com/maxcellent/lamma
Lamma schedule generator for Scala is a professional schedule generation library for periodic schedules like fixed income coupon payment, equity deravitive fixing date generation etc. - GitHub - m...
- 215Tiny High Performance HTTP Server for Scala
https://github.com/analogweb/analogweb-scala
Tiny High Performance HTTP Server for Scala . Contribute to analogweb/analogweb-scala development by creating an account on GitHub.
- 216A test framework that runs everything in parallel.
https://github.com/disneystreaming/weaver-test
A test framework that runs everything in parallel. - GitHub - disneystreaming/weaver-test: A test framework that runs everything in parallel.
- 217Clickhouse Scala Client with Reactive Streams support
https://github.com/crobox/clickhouse-scala-client
Clickhouse Scala Client with Reactive Streams support - crobox/clickhouse-scala-client
- 218Memcached client for Scala
https://github.com/monix/shade
Memcached client for Scala. Contribute to monix/shade development by creating an account on GitHub.
- 219A schema-aware Scala library for data transformation
https://github.com/galliaproject/gallia-core
A schema-aware Scala library for data transformation - galliaproject/gallia-core
- 220Efficient CBOR and JSON (de)serialization in Scala
https://github.com/sirthias/borer
Efficient CBOR and JSON (de)serialization in Scala - sirthias/borer
- 221A purely functional Scala client for CouchDB
https://github.com/beloglazov/couchdb-scala
A purely functional Scala client for CouchDB. Contribute to beloglazov/couchdb-scala development by creating an account on GitHub.
- 222The Play JSON library
https://github.com/playframework/play-json
The Play JSON library. Contribute to playframework/play-json development by creating an account on GitHub.
- 223Image comparison by hash codes
https://github.com/poslegm/scala-phash
Image comparison by hash codes. Contribute to poslegm/scala-phash development by creating an account on GitHub.
- 224Avro schema generation and serialization / deserialization for Scala
https://github.com/sksamuel/avro4s
Avro schema generation and serialization / deserialization for Scala - sksamuel/avro4s
- 225Scala combinator library for working with binary data
https://github.com/scodec/scodec
Scala combinator library for working with binary data - scodec/scodec
- 226Minimal, idiomatic, customizable validation Scala library.
https://github.com/yakivy/dupin
Minimal, idiomatic, customizable validation Scala library. - yakivy/dupin
- 227An implementation of an OAuth2 server designed for mocking/testing
https://github.com/zalando-stups/OAuth2-mock-play
An implementation of an OAuth2 server designed for mocking/testing - zalando-stups/OAuth2-mock-play
- 228A type-safe, reflection-free, powerful enumeration implementation for Scala with exhaustive pattern match warnings and helpful integrations.
https://github.com/lloydmeta/enumeratum
A type-safe, reflection-free, powerful enumeration implementation for Scala with exhaustive pattern match warnings and helpful integrations. - lloydmeta/enumeratum
- 229Optics library for Scala
https://github.com/optics-dev/Monocle
Optics library for Scala. Contribute to optics-dev/Monocle development by creating an account on GitHub.
- 230Scala etcd client implementing V3 APIs
https://github.com/mingchuno/etcd4s
Scala etcd client implementing V3 APIs. Contribute to mingchuno/etcd4s development by creating an account on GitHub.
- 231An asynchronous programming facility for Scala
https://github.com/scala/scala-async
An asynchronous programming facility for Scala. Contribute to scala/scala-async development by creating an account on GitHub.
- 232Accord: A sane validation library for Scala
https://github.com/wix/accord
Accord: A sane validation library for Scala. Contribute to wix-incubator/accord development by creating an account on GitHub.
- 233A data access library for Scala + Postgres.
https://github.com/tpolecat/skunk
A data access library for Scala + Postgres. Contribute to typelevel/skunk development by creating an account on GitHub.
- 234tinylog is a lightweight logging framework for Java, Kotlin, Scala, and Android
https://github.com/tinylog-org/tinylog
tinylog is a lightweight logging framework for Java, Kotlin, Scala, and Android - tinylog-org/tinylog
- 235A purely functional library to build distributed and event-driven systems
https://github.com/parapet-io/parapet
A purely functional library to build distributed and event-driven systems - parapet-io/parapet
- 236Non-blocking, Reactive Redis driver for Scala (with Sentinel support)
https://github.com/etaty/rediscala
Non-blocking, Reactive Redis driver for Scala (with Sentinel support) - etaty/rediscala
- 237Wonderful reusable code from Twitter
https://github.com/twitter/util
Wonderful reusable code from Twitter. Contribute to twitter/util development by creating an account on GitHub.
- 238The Scala API for Quantities, Units of Measure and Dimensional Analysis
https://github.com/typelevel/squants
The Scala API for Quantities, Units of Measure and Dimensional Analysis - typelevel/squants
- 239Squid – type-safe metaprogramming and compilation framework for Scala
https://github.com/epfldata/squid
Squid – type-safe metaprogramming and compilation framework for Scala - epfldata/squid
- 240Principled Functional Programming in Scala
https://github.com/scalaz/scalaz
Principled Functional Programming in Scala. Contribute to scalaz/scalaz development by creating an account on GitHub.
- 241sbt plugin that generates Scala case classes for easy, statically typed and implicit access of JSON data e.g. from API responses
https://github.com/battermann/sbt-json
sbt plugin that generates Scala case classes for easy, statically typed and implicit access of JSON data e.g. from API responses - battermann/sbt-json
- 242Accelerate local LLM inference and finetuning (LLaMA, Mistral, ChatGLM, Qwen, Baichuan, Mixtral, Gemma, Phi, MiniCPM, etc.) on Intel CPU and GPU (e.g., local PC with iGPU, discrete GPU such as Arc, Flex and Max); seamlessly integrate with llama.cpp, Ollama, HuggingFace, LangChain, LlamaIndex, GraphRAG, DeepSpeed, vLLM, FastChat, Axolotl, etc.
https://github.com/intel-analytics/BigDL
Accelerate local LLM inference and finetuning (LLaMA, Mistral, ChatGLM, Qwen, Baichuan, Mixtral, Gemma, Phi, MiniCPM, etc.) on Intel CPU and GPU (e.g., local PC with iGPU, discrete GPU such as Arc,...
- 243Mockito for Scala language
https://github.com/mockito/mockito-scala
Mockito for Scala language. Contribute to mockito/mockito-scala development by creating an account on GitHub.
- 244High-performance SLF4J wrapper for Scala.
https://github.com/Log4s/log4s
High-performance SLF4J wrapper for Scala. Contribute to Log4s/log4s development by creating an account on GitHub.
- 245🔍 Elasticsearch Scala Client - Reactive, Non Blocking, Type Safe, HTTP Client
https://github.com/sksamuel/elastic4s
🔍 Elasticsearch Scala Client - Reactive, Non Blocking, Type Safe, HTTP Client - Philippus/elastic4s
- 246aossie / Agora · GitLab
https://gitlab.com/aossie/Agora/
An Electronic Voting Library implemented in Scala
- 247aossie / Scavenger · GitLab
https://gitlab.com/aossie/Scavenger
A theorem prover based on the conflict resolution calculus
- 248SBT plugin for tweaking various IDE settings
https://github.com/JetBrains/sbt-ide-settings
SBT plugin for tweaking various IDE settings. Contribute to JetBrains/sbt-ide-settings development by creating an account on GitHub.
- 249An HTTP Server and Client library for Scala.
https://github.com/criteo/lolhttp
An HTTP Server and Client library for Scala. Contribute to criteo/lolhttp development by creating an account on GitHub.
- 250Scalafmt · Code formatter for Scala
https://scalameta.org/scalafmt/
Code formatter for Scala
- 251sbt plugin that can check Maven and Ivy repositories for dependency updates
https://github.com/rtimush/sbt-updates
sbt plugin that can check Maven and Ivy repositories for dependency updates - rtimush/sbt-updates
- 252Scala command-line wrapper around ffmpeg, ffprobe, ImageMagick, and other tools relating to media.
https://github.com/outr/media4s
Scala command-line wrapper around ffmpeg, ffprobe, ImageMagick, and other tools relating to media. - outr/media4s
- 253friendly little parsers
https://github.com/tpolecat/atto
friendly little parsers. Contribute to tpolecat/atto development by creating an account on GitHub.
- 254simple combinator-based parsing for Scala. formerly part of the Scala standard library, now a separate community-maintained module
https://github.com/scala/scala-parser-combinators
simple combinator-based parsing for Scala. formerly part of the Scala standard library, now a separate community-maintained module - scala/scala-parser-combinators
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- 10Creating a Scala-based Data Processing Pipeline: Handling Big Data Efficiently
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