Reason about resource-safety in the same way you reason about Structured Concurrency with SuspendApp!

Overview

Module suspendapp

Maven Central

dependencies {
  implementation("io.arrow-kt:suspendapp:_")
}

Rationale

When building applications that require graceful shutdown it typically requires us to write a lot of platform-specific code. This library aims to solve that problem by leveraging Kotlin MPP using KotlinX Coroutines, and Structured Concurrency.

Currently supported targets:

  • JVM
  • MacOsX64 & MacosArm64
  • NodeJS
  • Windows (MingwX64)
  • Linux

SuspendApp currently does not support any mobile or browser targets because it does not make sense to have such application behavior on such platforms. If you have a use-case for this please open a ticket!

Let's see some simple examples that more clearly demonstrate the rationale for SuspendApp.

Simple example

If you see App Started! Waiting until asked to shutdown. try pressing ctrl+C to signal interruption (SIGINT) to the process. You can also use ps -ax to find the PID and call kill PID to send a SIGTERM event to the process.

import arrow.continuations.SuspendApp
import kotlinx.coroutines.CancellationException
import kotlinx.coroutines.NonCancellable
import kotlinx.coroutines.delay
import kotlinx.coroutines.withContext

fun main() = SuspendApp {
  try {
    println("App Started!  Waiting until asked to shutdown.")
    while (true) {
      delay(2_500)
      println("Ping")
    }
  } catch (e: CancellationException) {
    println("Cleaning up App... will take 10 seconds...")
    withContext(NonCancellable) { delay(10_000) }
    println("Done cleaning up. Will release app to exit")
  }
}

Note: since our CoroutineScope is cancelled we need to run our delay in NonCancelable.

SuspendApp Arrow's Resource

Arrow Fx Coroutines Resource allows for modeling resources within the suspend world, and properly takes into account structured concurrency and cancellation. This means that when a CoroutineScope gets cancelled, then any suspend finalizer will back pressure Job#join. And thus when you call cancelAndJoin on a CoroutineScope it will properly await the finalizers to have finished running.

With SuspendApp this means that if someone sends a terminal signal such as SIGINT or SIGTERM to the App then it will run all the suspend finalizers before closing the App.

println("ExitCase: $exitCase") println("Shutting down will take 10 seconds") delay(10_000) println("Shutdown finished") } ).use { println("Application running with acquired resources.") awaitCancellation() } }">
fun main() = SuspendApp {
  Resource(
    acquire = { println("Creating some resource") },
    release = { _, exitCase ->
      println("ExitCase: $exitCase")
      println("Shutting down will take 10 seconds")
      delay(10_000)
      println("Shutdown finished")
    }
  ).use {
    println("Application running with acquired resources.")
    awaitCancellation()
  }
}

In the example above we have a Resource that during acquisition will print Creating some resource, when the Resource needs to be closed, release, we print the ExitCase with which the Resource was closed, and then we wait for 10 seconds. The Resource already takes care of calling release on a NonCancelable context.

We consume the Resource until our App is cancelled by calling awaitCancellation from KotlinX Coroutines. That gives us the following output, if you press ctrl+c in the terminal.

Creating some resource
Application running with acquired resources.
^CExitCase: Cancelled(exception=kotlinx.coroutines.JobCancellationException: LazyStandaloneCoroutine was cancelled; job=LazyStandaloneCoroutine{Cancelling}@f7470010)
Shutting down will take 10 seconds
Shutdown finished

You can find this example in the example module, currently setup for NodeJS and native targets.

SuspendApp with Ktor on Kubernetes

When we're working with Kubernetes we often need to support Graceful Shutdown . Kubernetes sends SIGTERM to our Pod to signal it needs to gracefully shutdown. However, there is an issue which doesn't allow us to immediately shutdown when we receive SIGTERM from Kubernetes.

Our pod can still receive traffic after SIGTERM, so we need to apply additional back-pressure to delay graceful shutdown. More information on this can be found in this blog by Phil Pearl, and on learnk8s.io.

Let's see an example of how we could solve this using SuspendApp and Resource for Ktor. Below we define a Resource for a Ktor ApplicationEngine, this represents the Engine running an Application for example Netty. For simplicity, the example omits additional configuration parameters such as host, port, etc. and uses Ktor's defaults instead.

When our release function of our ApplicationEngine is called we first wait for 30.seconds, this gives Kubernetes enough time to do all its network management before we shut down. After this grace period for K8S, we shut down the Netty engine gracefully.

fun <TEngine : ApplicationEngine, TConfiguration : ApplicationEngine.Configuration> server(
  factory: ApplicationEngineFactory<TEngine, TConfiguration>
): Resource<ApplicationEngine> =
  Resource(
    acquire = { embeddedServer(factory, module = {}).also(ApplicationEngine::start) },
    release = { engine, _ ->
      delay(30.seconds)
      engine.environment.log.info("Shutting down HTTP server...")
      engine.stop(5.seconds, 10.seconds)
      engine.environment.log.info("HTTP server shutdown!")
    })

Given this Resource definition of a Ktor server, with support for gracefully shutting down for K8S we can define a SuspendApp.

fun main() = SuspendApp {
  resource {
    val engine = server(Netty).bind()
    engine.application.routing {
      get("/ping") {
        call.respond("pong")
      }
    }
  }.use { awaitCancellation() }
}

We also use awaitCancellation here to await SIGTERM, SIGINT or other shutdown hooks, and we let the server Resource back-pressure closing the application for K8s.

SuspendApp with Kafka

Gracefully shutting down is also often needed with other applications, beside K8S. It can be useful in all kinds of applications that need to execute some code before getting shutdown.

Kafka for example, when streaming records from Kafka we need to commit (acknowledge) the offset of the records we've processed. The official recommendation for doing this is committing offsets in batches, so we typically don't send the commit event to Kafka for every processed record. Instead, we commit the offset every 5 seconds (or every x records, 5s is default).

Imagine the application getting stopped after 4,5 seconds, either by ctrl+c or K8S or another type of containerization. We could've processed thousands, or tens of thousands of events. If we don't commit these offsets before shutting down we'd have to re-process all the events.

We can easily prevent this with SuspendApp, and kotlin-kafka or reactor-kafka. Both these high-level Kafka libraries guarantee committing offsets upon termination of the stream, this includes cancellation! In the example below, all calls to acknowledge will be committed to Kafka before the SuspendApp terminates when receiving SIGTERM or SIGINT.

println("${record.key()} -> ${record.value()}") record.offset.acknowledge() }.collect() }">
import kotlinx.coroutines.flow.collect
import kotlinx.coroutines.flow.map
import org.apache.kafka.common.serialization.StringDeserializer
import io.github.nomisRev.kafka.receiver.KafkaReceiver
import io.github.nomisRev.kafka.receiver.ReceiverSettings
import arrow.continuations.SuspendApp

fun main() = SuspendApp {
  val settings: ReceiverSettings<Nothing, String> = ReceiverSettings(
    bootstrapServers = kafka.bootstrapServers,
    groupId = "group-id",
    valueDeserializer = StringDeserializer()
  )
  KafkaReceiver(settings)
    .receive(topicName)
    .map { record ->
      println("${record.key()} -> ${record.value()}")
      record.offset.acknowledge()
    }.collect()
}

Running SuspendApp applications on different platforms

A small tutorial on how you can configure and run SuspendApp on the different platforms. For more details on Kotlin Multiplatform configuration consult the official documentation here. Just ./gradlew build the project, and launch the created binaries as shown in the sections belows.

Node App

Make sure you configure your NodeJS app to be executable.

js(IR) {
  nodejs {
    binaries.executable()
  }
}

You can run your NodeJS app with the following node command, and if you press ctrl+c within the first 2500ms you will see the following output.

node build/js/packages/YourAppName/kotlin/YourAppName.js

App Started! Waiting until asked to shutdown.
^CCleaning up App... will take 10 seconds...
Done cleaning up. Will release app to exit

Native App

Make sure you configure your Native app(s) to be executable.

linuxX64 {
  binaries.executable()
}
mingwX64 {
  binaries.executable()
}
macosArm64 {
  binaries.executable()
}
macosX64 {
  binaries.executable()
}

You can run your Native app with the following command, and if you press ctrl+c within the first 2500ms you will see the following output.

./gradlew build
build/bin/native/releaseExecutable/YourAppName.kexe

App Started! Waiting until asked to shutdown.
^CCleaning up App... will take 10 seconds...
Done cleaning up. Will release app to exit
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    • KT-53465 Unnecessary checkcast to array of reified type is not optimized since Kotlin 1.6.20
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    • KT-53146 JVM IR: unnecessary checkcast of null leads to NoClassDefFoundError if the type isn't available at runtime
    • KT-53712 Add mode to prevent generating JVM 1.8+ annotation targets (TYPE_USE, TYPE_PARAMETER)
    • KT-54366 K2: no JVM BE specific diagnostics (in particular CONFLICTING_JVM_DECLARATIONS) in 1.8
    • KT-35187 NullPointerException on compiling suspend inline fun with typealias to suspend function type
    • KT-54275 K2: "IllegalArgumentException: KtParameter is not a subtype of class KtAnnotationEntry for factory REPEATED_ANNOTATION"
    • KT-53656 "IllegalStateException: typeParameters == null for SimpleFunctionDescriptorImpl" with recursive generic type parameters
    • KT-46727 Report warning on contravariant usages of star projected argument from Java
    • KT-53197 K2: 'init' hides member of supertype 'UIComponent' and needs 'override' modifier
    • KT-53867 K2: @JvmRecord does not compile to a java record
    • KT-53964 K2 is unable to work with Java records
    • KT-53349 K2: TYPE_MISMATCH caused by non-local return
    • KT-54100 "Type variable TypeVariable(P) should not be fixed" crash in code with errors
    • KT-54212 K2: cannot calculate implicit property type
    • KT-53699 K2: Exception during IR lowering in code with coroutines
    • KT-54192 Warn about unsupported feature on generic inline class parameters
    • KT-53723 Friend modules aren't getting passed to cache build during box tests
    • KT-53873 K2: Duplicated diagnostics reported from user type ref checkers
    • KT-50909 "VerifyError: Bad type on operand stack" caused by smartcasting for nullable inline class property in class
    • KT-54115 Restore Psi2IrTranslator constructor from 1.7.20
    • KT-53908 K2: Self-referencing generics in Java class causes New Inference Error (IE: class Foo<T extends Foo>)
    • KT-53193 K2: compile error on project that compiles fine with normal 1.7.10
    • KT-54062 K2 Invalid serialization for type-aliased suspend function type with extension receiver
    • KT-53953 Forbid usages of super or super if in fact it accesses an abstract member
    • KT-47473 NI: Missed UPPER_BOUND_VIOLATED diagnostics if use type aliases with type parameters
    • KT-54049 K2: false positive MANY_IMPL_MEMBER_NOT_IMPLEMENTED
    • KT-30054 Wrong approximation if nullable anonymous object with implemented interface is used
    • KT-53751 Postpone IgnoreNullabilityForErasedValueParameters feature
    • KT-53324 Implement Enum.entries lowering on K/N
    • KT-44441 K2: report redeclaration error if there is a Java class with the same name as the Kotlin class
    • KT-53807 No warning about declaringClass on an enum value
    • KT-53493 K2: val on function parameter counts as just warning
    • KT-53435 K2: "IllegalArgumentException: class KtValueArgument is not a subtype of class KtExpression for factory ANNOTATION_ARGUMENT_MUST_BE_CONST" if string in nested annotation is concatenated
    • KT-52927 AssertionError: LambdaKotlinCallArgumentImpl
    • KT-53922 Make Enum.entries unstable feature to poison binaries
    • KT-53783 Exception during psi2ir when declaring expect data object
    • KT-53622 [OVERLOAD_RESOLUTION_AMBIGUITY] when enum entry called 'entries' is present in K2
    • KT-41670 JVM IR: AbstractMethodError when using inheritance for fun interfaces
    • KT-53178 K2: implement diagnostics for serialization plugin
    • KT-53804 Restore old and incorrect logic of generating InnerClasses attributes for kotlin-stdlib
    • KT-52970 Default value constant in companion object works on JVM and JS, but fails on native
    • KT-51114 FIR: Support DNN checks
    • KT-27936 Write InnerClasses attribute for all class names used in a class file
    • KT-53719 Parsing regression on function call with type arguments and labeled lambda
    • KT-53261 Evaluate effect from inline for primitive types
    • KT-53706 K2: Context receivers are not resolved on properties during type resolution stage
    • KT-39492 Kotlin.Metadata's packageName field cannot be an empty string
    • KT-53664 Ir Interpreter: unable to evaluate name of function reference marked with JvmStatic from another module
    • KT-52478 [Native] Partial linkage: Building native binary from cached KLIBs fails if one library depends on removed nested callable member from another one
    • KT-48822 CompilationException: Back-end (JVM) Internal error: Failed to generate expression: KtProperty - ConcurrentModificationException
    • KT-50281 IllegalStateException: unsupported call of reified inlined function
    • KT-50083 Different error messages in android and JVM (Intrinsics.checkNotNullParameter).
    • KT-53236 Support Enum.entries codegen on JVM/IR BE
    • KT-41017 FIR: should we support smartcast after null check
    • KT-53202 "ISE: Descriptor can be left only if it is last" after direct invoke optimization on a capturing lambda
    • KT-46969 @BuilderInference with nested DSL scopes cause false-positive scope violation in Kotlin 1.5
    • KT-53257 FIR: Improper context receiver argument is chosen when there are two extension receiver candidates
    • KT-53090 Anonymous function and extension function literals are generated as classes even with -Xlambdas=indy
    • KT-53208 K2: Cannot get annotation for default interface method parameter when compiled with -Xuse-k2
    • KT-53184 K2: NoSuchMethodError on KProperty1.get() referenced via nullable typealias
    • KT-53198 K2: Return type mismatch: expected kotlin/Unit, actual kotlin/Unit?
    • KT-53100 Optimization needed: (CONSTANT_PRIMITIVE(x: T?)) => x
    • KT-49875 [FIR] Support infering PRIVATE_TO_THIS visibility
    • KT-53024 Refactor FIR renderer to composable architecture
    • KT-50995 [FIR] Support SAM with receiver plugin
    • KT-53148 K1: introduce warning for inline virtual member in enum
    • KT-49847 Devirtualization fails to eliminate boxing in function reference context
    • KT-52875 Extension function literal creation with -Xlambdas=indy fails with incorrect arguments
    • KT-53072 INVALID_IF_AS_EXPRESSION error isn't shown in the IDE (LV 1.8)
    • KT-52985 Native: a function with type T? returned a kotlin.Unit instead of null
    • KT-52020 FIR warning message includes internal rendering
    • KT-48778 -Xtype-enhancement-improvements-strict-mode not respecting @NonNull annotation for property accesses?
    IDE
    Fixes
    • KTIJ-22357 CCE “class org.jetbrains.kotlin.fir.types.impl.FirImplicitTypeRefImpl cannot be cast to class org.jetbrains.kotlin.fir.types.FirResolvedTypeRef” in K2
    • KT-55150 Argument for @NotNull parameter 'scope' of org/jetbrains/kotlin/resolve/AnnotationResolverImpl.resolveAnnotationType must not be null
    • KTIJ-22165 IDE notification to promote users to migrate to the new Kotlin/JS toolchain
    • KTIJ-22166 IDE notification (or something else) about JPS and Maven support for Kotlin/JS is deprecated
    • KT-53543 Rework light classes for file facade
    • KT-48773 Investigate the possibility of removing dependency on old JVM backend in light classes
    • KTIJ-19699 IDE: False positive type mismatch in Java code for Kotlin nested class non-direct inheritor from external library
    • KT-51101 FIR IDE: Exception on "Show Type Info" action
    • KTIJ-22295 MPP, IDE: False positive UPPER_BOUND_VIOLATED when JVM module implements the generic interface from MPP module and the type parameter is not equal to itself.
    • KT-51656 FIR IDE: ProgressCancelled exception is masked in the compiler during resolve
    • KT-51315 FIR IDE: move out base modules from fe10 plugin to reuse in k2 plugin
    • KTIJ-22323 K2: ISE during resolve of stdlib calls from the stdlib
    • KTIJ-21391 Generate -> Override methods : don't delegate to abstract methods
    • KT-53097 Extract common part of light classes to another module
    • KTIJ-22354 FIR LC: annotation owner is always null
    • KTIJ-22157 Kotlin call resolver leaks user code when reporting exception
    IDE. Completion
    • KTIJ-22552 Kotlin: 'for loop' postfix completion doesn't work - "Fe10SuggestVariableNameMacro must be not requested from main classloader"
    • KTIJ-22503 Support code completion for data objects
    IDE. Debugger
    • KT-51755 Compilation exception with scripting compilation during debug session
    • KTIJ-21963 Debugger / IR: Expression evaluation of the debugger doesn't work
    IDE. Decompiler, Indexing, Stubs
    • KTIJ-22750 Initialize Kotlin stub element types lazily
    • KTIJ-18094 IDE: "AssertionError: Stub count doesn't match stubbed node length" with minified Android AAR library
    • KTIJ-17632 IndexOutOfBoundsException: Cannot decompile a class located in minified AAR
    IDE. Gradle Integration
    • KT-48135 In the IDE import, reuse dependency granular source set KLIBs across multi-project build to avoid duplicate external libraries
    • KTIJ-22345 False positive unresolved reference for members of subclasses of expect classes.
    • KT-53514 HMPP: False positive for None of the following functions can be called with the arguments supplied. with Enum in common module
    • KT-51583 Gradle 7.4+ | SamplesVariantRule interference: Could not resolve all files for configuration ':kotlinKlibCommonizerClasspath'
    • KTIJ-21077 Dependency matrix does not work with Jetpack compose / multiplatform projects
    IDE. Inspections and Intentions
    • KTIJ-19531 Adapt changes about new rules for method implementation requirements
    • KTIJ-22087 Support IDE inspections for upcoming data objects
    • KTIJ-20510 Quick fix to implement and call correct super method in case of inheritance with defaults
    • KTIJ-20170 Provide quickfix for deprecated resolution to private constructor of sealed class
    • KTIJ-22630 FIR IDE: Lazy resolve exception after invocation of Override members action on value class
    • KT-49643 Intentions: "Implement members" fails when base type function declaration uses unresolved generic types
    IDE. JS
    • KTIJ-22167 Make JS IR default in projects created by wizard
    • KTIJ-22332 Wizard: Kotlin/JS projects: cssSupport DSL should be updated
    IDE. KDoc
    • KTIJ-22324 K2 IDE: implement reference resolve inside KDocs
    IDE. Multiplatform
    • KTIJ-19566 New Project Wizard: Update HMPP-related flags in multiplatform wizards
    IDE. Navigation
    • KT-51314 FIR IDE: show Kotlin declarations in search symbol
    • KTIJ-22755 Find usage for constructor from kotlin library doesn't work for secondary constructor usages
    IDE. Script
    • KTIJ-22598 Add warning for standalone scripts in source roots
    • KT-54325 .settings.gradle.kts and .init.gradle.kts are reported as standalone scripts
    IDE. Structural Search
    • KTIJ-21986 KSSR: "CodeFragment with non-kotlin context should have fakeContextForJavaFile set: originalContext = null" warning shows up when replacing
    IDE. Tests Support
    • KT-50269 FIR IDE: Allow running tests via gutter
    IDE. Wizards
    • KTIJ-23537 Wizard: projects with Android modules require higher sdkCompileVersion
    • KTIJ-23525 Wizard: Compose multiplatform: project won't build and require higher compileSdkVersion
    • KTIJ-22763 New Project Wizard: remove deprecated Android extensions plugin from Android target in the project constructor
    • KTIJ-22481 Wizard: Kotlin -> Browser application (gradle groove). Build error
    JavaScript
    Fixes
    • KT-55097 KJS / IR + IC: Using an internal function from a friend module throws an unbound symbol exception
    • KT-54406 Kotlin/JS: build with dependencies fails with "Could not find "kotlin" in [~/.local/share/kotlin/daemon]"
    • KT-53074 Make JS IR BE default in toolchain (gradle & CLI)
    • KT-50589 UTF-8 Instability in kotlin.js.map
    • KT-54934 KJS / IR + IC: Suspend abstract function stubs are generated with unstable lowered ic signatures
    • KT-54895 KJS / IR + IC: broken cross module references for function default param wrappers
    • KT-54520 KJS / IR Allow IdSignature clashes
    • KT-54120 JS IR + IC: pointless invalidation of dependent code after modifying companions
    • KT-53986 KJS / IR + IC: compiler produces different JS file names with IC and without IC
    • KT-54010 JS IR + IC: Force IC cache invalidation after updating language version or features
    • KT-53931 KJS / Gradle: Regression with 1.7.20-RC: ReferenceError: println is not defined
    • KT-53968 Kotlin/JS: no UninitializedPropertyAccessException on access to non-initialized lateinit property defined in dependencies
    • KT-54686 KJS / IR: Incorrect generation of signatures when one of argument is nested class
    • KT-54479 KJS / IR + IC: Adding or removing companion fields leads java.lang.IllegalStateException in the compiler IC infrastructure
    • KT-54382 KJS / IR: Wrong type check for inheritors of suspend functions
    • KT-54323 KJS / IR + IC: Intrinsics from stdlib may lose their dependencies in incremental rebuild
    • KT-53361 KJS / IR: No debug info is generated for in-line js code
    • KT-53321 Implement Enum.entries lowering on JS/IR
    • KT-53112 KJS IR turn on IC infra by default
    • KT-50503 Kotlin/JS: IR + IC: compileTestDevelopmentExecutableKotlinJs fails with ISE: "Could not find library" after removing module dependency
    • KT-54011 JS IR + IC: EnumEntries don't work well when IC is enabled
    • KT-53672 KJS / IR: "IndexOutOfBoundsException: Index 0 out of bounds for length 0" caused by function reference to extension function of reified type variable
    • KT-43455 KJS: IR. Incremental compilation problem with unbound symbols
    • KT-53539 KJS: Exported class inherited non-exported class shows warning
    • KT-53443 KJS/IR: NullPointerException caused by anonymous objects inside lambdas
    • KT-52795 K/JS and K/Native IR-validation/compilation errors for a valid kotlin code
    • KT-52805 KJS/IR: Invalid call of inline function in also block
    • KT-51151 KJS / IR: Wrong overloaded generic method with receiver is called
    • KT-52830 KJS/IR: Sourcemap disabling doesn't work
    • KT-52968 KJS / IR: Buggy generation of overridden methods
    • KT-53063 KJS / IR + IC: undefined cross module reference for implemented interface functions
    • KT-51099 KJS / IR + IC: Cache invalidation doesn't check generic class variance annotations (in, out)
    • KT-51090 KJS / IR + IC: Cache invalidation doesn't check suspend qualifier
    • KT-51088 KJS / IR + IC: Cache invalidation doesn't check class qualifiers (data, inline)
    • KT-51083 KJS / IR + IC: Cache invalidation doesn't check inline function which was non inline initially
    • KT-51896 KJS / IR + IC: Cache invalidation doesn't trigger rebuild for fake overridden inline functions
    Language Design
    • KT-48385 Deprecate confusing grammar in when-with-subject
    • KT-48516 Forbid @Synchronized annotation on suspend functions
    • KT-41886 Ability to require opt-in for interface implementation, but not for usage
    • KT-34943 OVERLOAD_RESOLUTION_AMBIGUITY inconsistent with the equivalent Java code
    • KT-51334 Implement type-bound label this@Type
    Libraries
    New Features
    • KT-21007 Provide Kotlin OSGI Bundle with extensions for JRE8 (and JRE7)
    • KT-54082 Comparable and subtractible TimeMarks
    • KT-52928 Provide copyToRecursively and deleteRecursively extension functions for java.nio.file.Path
    • KT-49425 Update OptIn documentation to reflect latest design changes
    • KT-54005 Allow calling declaringJavaClass on Enum
    • KT-52933 rangeUntil members in built-in types
    Performance Improvements
    • KT-53508 Cache typeOf-related KType instances when kotlin-reflect is used
    Fixes
    • KT-51907 Switch JVM target of the standard libraries to 1.8
    • KT-54835 Document that Iterable.all(emptyCollection) returns TRUE.
    • KT-54168 Expand on natural order in comparator docs
    • KT-53277 Stabilize experimental API for 1.8
    • KT-53864 Review deprecations in stdlib for 1.8
    • KT-47707 Remove the system property and the brittle contains optimization code itself
    • KT-52336 Different behavior on JVM and Native in stringBuilder.append(charArray, 0, 1)
    • KT-53927 Remove deprecation from ConcurrentModificationException constructors
    • KT-53152 Introduce EnumEntries to stdlib as backing implementation of Enum.entries
    • KT-53134 stdlib > object Charsets > not thread safe lazy initialization
    • KT-51063 Gradle project with JPS runner: "JUnitException: Failed to parse version" JUnit runner internal error with JUnit
    • KT-52908 Native: setUnhandledExceptionHook swallows exceptions
    Native
    • KT-51043 Kotlin Native: ObjC-Interop: kotlin.ClassCastException: null cannot be cast to kotlin.Function2
    • KT-50786 Native: prohibit suspend calls inside autoreleasepool {}
    • KT-52834 Implement test infrastructure for K2/Native
    Native. C Export
    • KT-36878 Reverse C Interop: incorrect headers generation for primitive unassigned type arrays
    • KT-53599 [Reverse C Interop] Provide box/unbox API for unsigned primitive types
    • KT-41904 Kotlin/Native : error: duplicate member for interface and function with the same name
    • KT-42830 [Reverse C Interop] Add API to get value of boxed primitives
    • KT-39496 K/N C: optional unsigned types as function parameters crash the compiler
    • KT-39015 Cannot compile native library with nullable inline class
    Native. C and ObjC Import
    • KT-54738 Cocoapods cinterop: linking platform.CoreGraphics package
    • KT-54001 Kotlin/Native: support header exclusion in cinterop def files
    • KT-53151 Native: Custom declarations in .def don't work with modules, only headers
    Native. ObjC Export
    • KT-53680 Obj-C refinement annotations
    • KT-54119 Native: runtime assertion failed due to missing thread state switch
    • KT-42641 Don't export generated component* methods from Kotlin data classes to Obj-C header
    Native. Platform Libraries
    • KT-54225 Native: update to Xcode 14.1
    • KT-54164 Native: commonizer fails on CoreFoundation types
    • KT-39747 Why is there no WinHttp API in Kotlin/Native's Windows API?
    Native. Runtime
    • KT-49228 Kotlin/Native: Allow to unset unhandled exception hook
    • KT-27305 Fix FILE macro inside RuntimeCheck and RuntimeAssert
    Native. Runtime. Memory
    • KT-54498 Deprecation message of 'FreezingIsDeprecated' is not really helpful
    • KT-53182 New memory manager: Unexpected memory usage on IOS
    Native. Stdlib
    • KT-52429 Small Usability Improvements for Worker API
    Reflection
    • KT-54629 Incorrectly cached class classifier
    • KT-54611 KTypeImpl does not take into account class loader from the classifier property
    • KT-48136 Make Reflection.getOrCreateKotlinPackage use cache when kotlin-reflect is used
    • KT-50705 Use ClassValue to cache KClass objects in kotlin-reflect
    • KT-53454 Properly cache the same class's KClass when it's loaded by multiple classloaders in getOrCreateKotlinClass
    Specification
    • KT-54210 Update Kotlin specification to mention that since 1.8 generics in value classes are allowed
    Tools. CLI
    • KT-54116 Add JVM target bytecode version 19
    • KT-53278 Support values 6 and 8 for -Xjdk-release
    • KT-46312 CLI: Kotlin runner should use platform class loader to load JDK modules on Java 9+
    Tools. Commonizer
    • KT-54310 Commonizer fails on 1.8.0-dev K/N distributions
    • KT-48576 [Commonizer] platform.posix.pselect not commonized in Ktor
    Tools. Compiler Plugins
    • KT-46959 Kotlin Lombok: Support generated builders (@Builder)
    • KT-53683 Unresolved reference compilation error occurs if a file is annotated with @ Singular and has any guava collection type : ImmutableTable, ImmutableList or else
    • KT-53657 [K2] Unresolved reference compilation error occurs if a field is annotated with @ Singular and has type NavigableMap without explicit types specification
    • KT-53647 [K2] Unresolved reference compilation error occurs if a field is annotated with @ Singular and has type Iterable<>
    • KT-53724 Param of the @ Singular lombok annotation ignoreNullCollections=true is ignored by kotlin compiler
    • KT-53451 [K2] References to methods generated by @ With lombok annotation can't be resolved with enabled K2 compiler
    • KT-53721 [K2] There is no compilation error while trying to add null as a param of the field with non-null type
    • KT-53370 Kotlin Lombok compiler plugin can't resolve methods generated for java boolean fields annotated with @ With annotation
    Tools. Compiler plugins. Serialization
    • KT-54878 JVM/IR: java.lang.ClassCastException: class org.jetbrains.kotlin.ir.types.impl.IrStarProjectionImpl cannot be cast to class org.jetbrains.kotlin.ir.types.IrTypeProjection on serializer<Box<*>>()
    • KT-55340 Argument for kotlinx.serialization.UseSerializers does not implement KSerializer or does not provide serializer for concrete type
    • KT-55296 Improve exceptions in serialization plugin
    • KT-55180 KJS: regression in serialization for Kotlin 1.8.0-beta
    • KT-53157 Recursion detected in a lazy value under LockBasedStorageManager in kotlinx.serialization
    • KT-54297 Regression in serializable classes with star projections
    • KT-49660 kotlinx.serialization: IndexOutOfBoundsException for parameterized sealed class
    • KT-43910 JS IR: Serialization with base class: "IndexOutOfBoundsException: Index 0 out of bounds for length 0"
    Tools. Daemon
    • KT-52622 Kotlin/JS, Kotlin/Common compilations start Kotlin daemon incompatible with Kotlin/JVM compilation on JDK 8
    Tools. Gradle
    New Features
    • KT-27301 Expose compiler flags via Gradle lazy properties
    • KT-53357 Change single build metrics property
    • KT-50673 Gradle: KotlinCompile task(s) should use @NormalizeLineEndings
    • KT-34464 Kotlin build report path not clickable in the IDE
    Performance Improvements
    • KT-51525 [Gradle] Optimize evaluating args for compile tasks
    • KT-52520 Remove usage of reflection from CompilerArgumentsGradleInput
    Fixes
    • KT-48843 Add ability to disable Kotlin daemon fallback strategy
    • KT-55334 kaptGenerateStubs passes wrong android variant module names to compiler
    • KT-55255 Gradle: stdlib version alignment fails build on dynamic stdlib version.
    • KT-55363 [K1.8.0-Beta] Command line parsing treats plugin parameters as source files
    • KT-54993 Raise kotlin.jvm.target.validation.mode check default level to error when build is running on Gradle 8+
    • KT-54136 Duplicated classes cause build failure if a dependency to kotlin-stdlib specified in an android project
    • KT-50115 Setting toolchain via Java extension does not configure 'kotlinOptions.jvmTarget' value when Kotlin compilation tasks are created eagerly
    • KT-55222 Migrate AndroidDependencyResolver to the new Gradle API
    • KT-55119 There is no validation for different jvmTarget and targetCompatibility values in multiplatform projects with jvm target and used java sources
    • KT-55102 Compile java task fails with different target version in pure kotlin project
    • KT-54995 [1.8.0-Beta] compileAppleMainKotlinMetadata fails on default parameters with No value passed for parameter 'mustExist'
    • KT-35003 Automatically set targetCompatibility for kotlin-jvm projects to work with gradle 6 metadata
    • KT-45335 kotlinOptions.jvmTarget conflicts with Gradle variants
    • KT-48798 Android: going from one to more than one productFlavor causes inputs of commonSourceSet$kotlin_gradle_plugin property of compileKotlin task to change
    • KT-55019 Gradle sync: UnknownConfigurationException when adding implementation dependencies to a Kotlin with Java compilation
    • KT-55004 jvmTarget value is ignored by depending modules if a task "UsesKotlinJavaToolchain" is configured for all project modules using allProjects {}
    • KT-54888 Add Gradle property to suppress kotlinOptions.freeCompilerArgs modification on execution phase
    • KT-54399 Undeprecate 'kotlinOptions' DSL
    • KT-54306 Change the naming of newly added Compiler*Options classes and interfaces
    • KT-54580 KotlinOptions in AbstractKotlinCompilation class are deprecated
    • KT-54653 java.lang.NoClassDefFoundError: kotlin/jdk7/AutoCloseableKt exception if a dependency to the kotlin-stdlib is added
    • KT-52624 Compatibility with Gradle 7.3 release
    • KT-54703 Stdlib substitution does not work with JPMS modules
    • KT-54602 Prevent leaking Gradle Compile DSL types into compiler cli runtime
    • KT-54439 Project failed to sync Native LaguageSettings to compiler options in afterEvaluate
    • KT-53885 Bump minimal supported Gradle version to 6.8.3
    • KT-53773 Protect and system properties can contain sensitive data
    • KT-53732 Add custom values limits for build scan reports
    • KT-52623 Compatibility with Gradle 7.2. release
    • KT-51831 Gradle: remove kotlin.compiler.execution.strategy system property
    • KT-51679 Change deprecation level to error for KotlinCompile setClasspath/getClasspath methods
    • KT-54335 Kotlin build report configuration. There is no validation for SINGLE_FILE output if the required kotlin.build.report.single_file property is empty or absent
    • KT-54356 Kotlin build report configuration. Wrong path is used for the property kotlin.internal.single.build.metrics.file
    • KT-53617 KotlinCompilerExecutionStrategy value is ignored by depending modules if configure once for all project modules using allProjects {}
    • KT-53823 Kotlin Gradle Plugin uses deprecated Gradle API: Provider.forUseAtConfigurationTime()
    • KT-54142 Increase Kotlin Gradle plugin Gradle target API to 7.5
    • KT-50161 Android variant filter breaks KotlinCompile cache compatibility
    • KT-54113 LanguageSettings to KotlinNativeLink.toolOptions sync are executed on the wrong context
    • KT-53830 Versions of kotlin-stdlib-jdk8 and kotlin-stdlib-jdk7 aren't overrided if added as transitive dependencies to kotlin-stdlib
    • KT-54112 Missing target input on KotlinNativeLink task
    • KT-45879 Documentation: Wrong kotlin languageVersion "1.6 (EXPERIMENTAL)"
    • KT-54103 Remove JvmTarget.JVM_1_6 from generated Gradle compiler type
    • KT-52959 KMP code is breaking Gradle project isolation
    • KT-50598 MULTIPLE_KOTLIN_PLUGINS_SPECIFIC_PROJECTS_WARNING is only shown on first build
    • KT-53246 Gradle: Special characters in paths of errors and warnings should be escaped
    • KT-47730 How to avoid stdlib coming from Kotlin gradle plugin
    • KT-52209 Corrupted cache and non-incremental build if produce caches "in process" and restore then compiling with kotlin daemon
    • KT-41642 "TaskDependencyResolveException: Could not determine the dependencies" when trying to apply stdlib
    • KT-53390 Drop usage of -Xjava-source-roots when passing java sources required for Kotlin compilation
    • KT-52984 Kotlin Gradle plugin is misbehaving by resolving DomainObjectCollection early
    • KT-38622 Non-incremental compilation because of R.jar with Android Gradle plugin 3.6
    • KT-38576 AnalysisResult.RetryWithAdditionalRoots crashes during incremental compilation with java classes in classpath
    Tools. Gradle. Cocoapods
    • KT-54314 Cocoapods: Signing pod dependency for Xcode 14
    • KT-54060 Xcode 14: disable bitcode embedding for Apple frameworks
    • KT-53340 Change default linking type for frameworks registered by cocoapods plugin
    • KT-53392 Deprecate and delete downloading pod dependencies by direct link
    • KT-53695 Build of macOS application fails if a framework is integrated via Cocoapods plugin
    Tools. Gradle. JS
    • KT-53367 KJS: Migrate cssSupport API
    • KT-45789 KJS / IR: Transitive NPM dependencies are not included in PublicPackageJsonTask output
    • KT-55099 K/JS: Second declaration of JS target without compiler type report warning incorrectly
    • KT-52951 [KGP/JS] Browser test target registration via properties
    • KT-52950 KJS: Report if yarn.lock was updated during built
    • KT-53374 KJS / Gradle: Implement IDEA sync detection logic via ValueSource to improve configuration cache support
    • KT-53381 Kotlin/JS: with erased kotlin-js-store/ and reportNewYarnLock = true the task kotlinUpgradeYarnLock always fails
    • KT-53788 KJS / Gradle: Disable Gradle build cache for KotlinJsDce when development mode is enabled
    • KT-53614 Kotlin/JS upgrade npm dependencies
    Tools. Gradle. Multiplatform
    New Features
    • KT-53396 Support 'implementation platform()' by gradle kotlin mpp plugin for JVM target
    • KT-40489 MPP / Gradle: support BOM (enforcedPlatform) artifacts in source set dependencies DSL
    Performance Improvements
    • KT-52726 [MPP] Optimize caching/performance/call-sites of 'compilationsBySourceSets'
    Fixes
    • KT-54634 MPP: Test Failure causes: KotlinJvmTest$Executor$execute$1 does not define failure
    • KT-35916 Gradle MPP plugin: Configurations for a main compilation and its default source set have different naming
    • KT-46960 Repeated kotlin/native external libraries in project
    • KT-27292 MPP: jvm { withJava() }: Gradle build: Java source under Kotlin root is resolved while building, but does not produce output class files
    • KT-34650 Naming clash in MPP+Android: androidTest vs androidAndroidTest
    • KT-54387 Remove MPP alpha stability warning
    • KT-31468 Targets disambiguation doesn't work if a depending multiplatform module uses withJava() mode
    • KT-54090 Take an Apple test device from the device list
    • KT-54301 KotlinToolingVersionOrNull: IllegalArgumentException
    • KT-53256 Implement K/N compiler downloading for KPM
    • KT-45412 KotlinCompilation: Make sure .kotlinSourceSets and .allKotlinSourceSets include the default source set
    • KT-49202 Tests on android target can't be executed in multiplatform project if dependency to kotlin-test framework is provided as a single dependency and tests configured to be executed via Junit5
    Tools. Gradle. Native
    New Features
    • KT-43293 Support Gradle configuration caching with Kotlin/Native
    • KT-53107 Add arm64 support for watchOS targets (Xcode 14)
    Fixes
    • KT-53704 Native cinterop: eager header path calculation
    • KT-54814 Kotlin/Native: Github Actions: Testing watchOSX64 with Xcode 14 — Invalid device: Apple Watch Series 5
    • KT-54627 Native: :commonizeNativeDistribution with configuration cache enabled fails even when set to warn on JDK 17
    • KT-54339 Link tasks fail if Gradle Configuration Cache is enabled
    • KT-53191 Native cinterop sync problem with gradle
    • KT-54583 watchosDeviceArm64 target shouldn't register test tasks
    • KT-52303 Gradle / Native: Build tasks ignore project.buildDir
    • KT-54442 Gradle iOS test tasks fail if a device is not selected explicitly
    • KT-54177 Gradle: Deprecate enableEndorsedLibs flag
    • KT-47355 Support macos target for FatFramework task
    • KT-53339 MPP / CocoaPods: The static framework fails to install on a real iOS device
    • KT-31573 Missing description for Native Gradle tasks
    • KT-53131 Gradle Sync: "NoSuchElementException: Array contains no element matching the predicate" with CocoaPods
    • KT-53686 Task assembleReleaseXCFramework fails with "error: the path does not point to a valid framework" if project name contains a dash
    Tools. Incremental Compile
    • KT-54144 New IC: "IllegalStateException: The following LookupSymbols are not yet converted to ProgramSymbols" when changing an inline function with custom JvmName
    • KT-53871 New IC: "IllegalStateException: The following LookupSymbols are not yet converted to ProgramSymbols" when changing an inline property accessor
    • KT-19804 Relocatable IC caches
    Tools. JPS
    • KT-45474 False positive NO_ELSE_IN_WHEN on sealed class with incremental compilation
    • KT-54228 Switching abstract to sealed classes causes incremental issue
    • KT-38483 JPS: Stopping compilation causes IDE CompilationCanceledException
    • KT-50310 False positive NO_ELSE_IN_WHEN on incremental build when adding sealed classes
    • KT-48813 Move cache version to compiler
    • KTIJ-921 JPS: FileNotFoundException on project build in mixed Kotlin/Scala project
    Tools. Kapt
    • KT-54187 JVM IR + kapt: incorrect modifier final is generated for nested enum in interface
    • KT-48827 Remove 'kapt.use.worker.api' property
    Tools. Scripts
    • KT-54355 Scripts: Internal compiler error (languageVersion=1.9)
    • KT-53009 Scripting: NDFDE “Descriptor wasn't found for declaration SCRIPT” on using script definition with kotlin from master

    Configuration

    📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

    🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

    Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

    🔕 Ignore: Close this PR and you won't be reminded about this update again.


    • [ ] If you want to rebase/retry this PR, check this box

    This PR has been generated by Mend Renovate. View repository job log here.

    opened by renovate[bot] 0
  • Dependency Dashboard

    Dependency Dashboard

    This issue lists Renovate updates and detected dependencies. Read the Dependency Dashboard docs to learn more.

    Open

    These updates have all been created already. Click a checkbox below to force a retry/rebase of any.

    Detected dependencies

    github-actions
    .github/workflows/generate-alpha-tag.yaml
    • actions/checkout v3
    • actions/setup-java v3.9.0
    • gradle/gradle-build-action v2.3.3
    • actions/checkout v3
    • actions/setup-java v3.9.0
    • gradle/gradle-build-action v2.3.3
    .github/workflows/generate-tag.yaml
    • actions/checkout v3
    • actions/setup-java v3.9.0
    • gradle/gradle-build-action v2.3.3
    • actions/checkout v3
    • actions/setup-java v3.9.0
    • gradle/gradle-build-action v2.3.3
    .github/workflows/publish.yml
    • actions/checkout v3
    • actions/setup-java v3.9.0
    • gradle/gradle-build-action v2.3.3
    • actions/upload-artifact v3.1.1
    • gradle/gradle-build-action v2.3.3
    • gradle/gradle-build-action v2.3.3
    .github/workflows/pull_request.yml
    • actions/checkout v3.2.0
    • actions/setup-java v3.9.0
    • gradle/gradle-build-action v2.3.3
    • actions/upload-artifact v3.1.1
    • actions/checkout v3
    • actions/setup-java v3.9.0
    • gradle/gradle-build-action v2.3.3
    • stefanzweifel/git-auto-commit-action v4.16.0
    gradle
    gradle.properties
    settings.gradle.kts
    build.gradle.kts
    • org.jetbrains.kotlin.multiplatform 1.7.22
    example/build.gradle.kts
    • io.arrow-kt:arrow-fx-coroutines 1.1.3
    gradle/libs.versions.toml
    • org.jetbrains.kotlinx:kotlinx-coroutines-core 1.6.4
    • org.jetbrains.kotlinx:kotlinx-knit 0.4.0
    • io.arrow-kt.arrow-gradle-config-formatter 0.10.1
    • io.arrow-kt.arrow-gradle-config-nexus 0.10.1
    • io.arrow-kt.arrow-gradle-config-publish 0.10.1
    • io.arrow-kt.arrow-gradle-config-versioning 0.10.1
    • org.jetbrains.dokka 1.7.20
    • org.jetbrains.kotlin.multiplatform 1.7.22
    • org.jetbrains.kotlinx.binary-compatibility-validator 0.12.1
    • org.jetbrains.kotlinx.knit 0.4.0
    gradle-wrapper
    gradle/wrapper/gradle-wrapper.properties
    • gradle 7.6

    • [ ] Check this box to trigger a request for Renovate to run again on this repository
    opened by renovate[bot] 0
  • Update arrowGradleConfig to v0.11.0

    Update arrowGradleConfig to v0.11.0

    Mend Renovate

    This PR contains the following updates:

    | Package | Change | Age | Adoption | Passing | Confidence | |---|---|---|---|---|---| | io.arrow-kt.arrow-gradle-config-versioning | 0.10.1 -> 0.11.0 | age | adoption | passing | confidence | | io.arrow-kt.arrow-gradle-config-publish | 0.10.1 -> 0.11.0 | age | adoption | passing | confidence | | io.arrow-kt.arrow-gradle-config-nexus | 0.10.1 -> 0.11.0 | age | adoption | passing | confidence | | io.arrow-kt.arrow-gradle-config-formatter | 0.10.1 -> 0.11.0 | age | adoption | passing | confidence |


    Release Notes

    arrow-kt/arrow-gradle-config

    v0.11.0

    Compare Source

    v0.10.2

    Compare Source


    Configuration

    📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

    🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

    Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

    🔕 Ignore: Close this PR and you won't be reminded about these updates again.


    • [ ] If you want to rebase/retry this PR, check this box

    This PR has been generated by Mend Renovate. View repository job log here.

    opened by renovate[bot] 6
  • Setup Java in Kotlin MPP Example

    Setup Java in Kotlin MPP Example

    The example module currently doesn't setup the Java app. Upon setting up the example module we ran into some issues setting up Java from a Kotlin MPP project.

    It didn't correctly link the Main-Class in the Manifest when configuring from the regular Java Gradle DSL. Neither Google, nor Kotlin Slack gave me an quick solution so I opted to move it out of the scope of PR #4.

    opened by nomisRev 0
Releases(0.3.1)
  • 0.3.1(Oct 18, 2022)

    What's Changed

    • Configure Renovate by @renovate in https://github.com/arrow-kt/suspendapp/pull/6
    • Update actions/setup-java action to v3.4.1 by @renovate in https://github.com/arrow-kt/suspendapp/pull/7
    • Update dependency gradle to v7.5.1 by @renovate in https://github.com/arrow-kt/suspendapp/pull/10
    • Update dependency org.jetbrains.dokka to v1.7.10 by @renovate in https://github.com/arrow-kt/suspendapp/pull/12
    • Update gradle/gradle-build-action action to v2.3.0 by @renovate in https://github.com/arrow-kt/suspendapp/pull/13
    • Update dependency org.jetbrains.kotlinx.binary-compatibility-validator to v0.11.0 by @renovate in https://github.com/arrow-kt/suspendapp/pull/14
    • Update actions/setup-java action to v3.5.0 by @renovate in https://github.com/arrow-kt/suspendapp/pull/16
    • Update dependency org.jetbrains.kotlinx.binary-compatibility-validator to v0.11.1 by @renovate in https://github.com/arrow-kt/suspendapp/pull/15
    • Update dependency io.arrow-kt:arrow-fx-coroutines to v1.1.3 by @renovate in https://github.com/arrow-kt/suspendapp/pull/11
    • Update plugin org.jetbrains.kotlin.multiplatform to v1.7.20 by @renovate in https://github.com/arrow-kt/suspendapp/pull/21
    • Update dependency org.jetbrains.kotlin.multiplatform to v1.7.20 by @renovate in https://github.com/arrow-kt/suspendapp/pull/20
    • Update actions/setup-java action to v3.5.1 by @renovate in https://github.com/arrow-kt/suspendapp/pull/19
    • Update stefanzweifel/git-auto-commit-action action to v4.15.0 by @renovate in https://github.com/arrow-kt/suspendapp/pull/18
    • Update gradle/gradle-build-action action to v2.3.2 by @renovate in https://github.com/arrow-kt/suspendapp/pull/17
    • Update actions/checkout action to v3.1.0 by @renovate in https://github.com/arrow-kt/suspendapp/pull/22
    • Update stefanzweifel/git-auto-commit-action action to v4.15.1 by @renovate in https://github.com/arrow-kt/suspendapp/pull/23
    • Update dependency org.jetbrains.dokka to v1.7.20 by @renovate in https://github.com/arrow-kt/suspendapp/pull/24

    New Contributors

    • @renovate made their first contribution in https://github.com/arrow-kt/suspendapp/pull/6

    Full Changelog: https://github.com/arrow-kt/suspendapp/compare/0.3.0...0.3.1

    Source code(tar.gz)
    Source code(zip)
  • 0.3.0(Aug 16, 2022)

    The first release of SuspendApp for Kotlin JVM, macOS/Linux/MingwX64 & Node JS. Documentation can be found here

    What's Changed

    • Add initial impl by @nomisRev
    • Enable plugins, and format project by @nomisRev in https://github.com/arrow-kt/suspendapp/pull/2
    • Set groupId, and setup Dokka by @nomisRev in https://github.com/arrow-kt/suspendapp/pull/3
    • Write documentation for first release by @nomisRev in https://github.com/arrow-kt/suspendapp/pull/4
    Source code(tar.gz)
    Source code(zip)
Owner
ΛRROW
Functional Data Types & Abstractions for Kotlin
ΛRROW
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