Dependency Injection is perhaps the most powerful pattern of them all but I when combined with Kotlin I wonder if Dagger is reliable and most importantly debuggable enough to work on large projects. As just one example this instruction in gradle
kapt "com.google.dagger:dagger-compiler:$rootProject.daggerVersion"
Yields a wonderfully long but useless message Cannot access NonExistent class: Missing of course is such difficult information 1) The name of the class that is missing 2) Any information whatsoever about the point point in code where this reference is located.
Apparently it's a old issue reported in 2016 here: https://github.com/google/dagger/issues/435
To solve this involves a two step process outlined here: ERROR : error.NonExistentClass Kotlin In multi module Dagger project
Keep in mind you can have this error without multi-module situation.
This to me is prohibitive to using Dagger in a Kotlin app. Am I missing something or using the wrong version of something. I attached my whole gradle files below too!
Error:17:18:39.263 [ERROR] [system.err] warning: Supported source version 'RELEASE_7' from annotation processor '__gen.AnnotationProcessorWrapper_debug_android_arch_persistence_room_RoomProcessor' less than -source '1.8'
17:18:39.263 [ERROR] [system.err] error: cannot access NonExistentClass
17:18:39.263 [ERROR] [system.err] class file for error.NonExistentClass not found
17:18:39.263 [ERROR] [system.err] Consult the following stack trace for details.
17:18:39.267 [ERROR] [system.err] com.sun.tools.javac.code.Symbol$CompletionFailure: class file for error.NonExistentClass not found
17:18:39.363 [ERROR] [system.err] 1 error
17:18:39.363 [ERROR] [system.err] 1 warning
17:18:39.399 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] FAILURE: Build failed with an exception.
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * What went wrong:
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Execution failed for task ':app:compileDebugJavaWithJavac'.
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] > Compilation failed; see the compiler error output for details.
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * Exception is:
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:compileDebugJavaWithJavac'.
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:100)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:70)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:63)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:88)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:52)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:34)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker$1.run(DefaultTaskGraphExecuter.java:248)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:197)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:107)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:241)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:230)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.processTask(DefaultTaskPlanExecutor.java:124)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.access$200(DefaultTaskPlanExecutor.java:80)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:105)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:99)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute(DefaultTaskExecutionPlan.java:625)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.executeWithTask(DefaultTaskExecutionPlan.java:580)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.run(DefaultTaskPlanExecutor.java:99)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Caused by: org.gradle.api.internal.tasks.compile.CompilationFailedException: Compilation failed; see the compiler error output for details.
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:51)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:36)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.delegateAndHandleErrors(NormalizingJavaCompiler.java:99)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.execute(NormalizingJavaCompiler.java:52)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.execute(NormalizingJavaCompiler.java:37)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.compile.CleaningJavaCompilerSupport.execute(CleaningJavaCompilerSupport.java:35)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.compile.CleaningJavaCompilerSupport.execute(CleaningJavaCompilerSupport.java:25)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.tasks.compile.JavaCompile.performCompilation(JavaCompile.java:198)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.tasks.compile.JavaCompile.compile(JavaCompile.java:183)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.tasks.compile.JavaCompile.compile(JavaCompile.java:120)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at com.android.build.gradle.tasks.factory.AndroidJavaCompile.compile(AndroidJavaCompile.java:95)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$IncrementalTaskAction.doExecute(DefaultTaskClassInfoStore.java:173)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.execute(DefaultTaskClassInfoStore.java:134)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.execute(DefaultTaskClassInfoStore.java:121)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:122)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:197)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:107)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:111)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:92)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] ... 27 more
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
17:18:39.411 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
17:18:39.411 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * Get more help at https://help.gradle.org
17:18:39.411 [ERROR] [org.gradle.internal.buildevents.BuildResultLogger]
17:18:39.411 [ERROR] [org.gradle.internal.buildevents.BuildResultLogger] BUILD FAILED in 41s
Gradle File:
apply plugin: 'com.android.application'
apply plugin: 'me.tatarka.retrolambda'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
buildscript {
repositories {
jcenter()
mavenCentral()
google()
}
dependencies {
classpath 'me.tatarka:gradle-retrolambda:3.7.0'
}
}
kapt {
generateStubs = true
}
android {
compileSdkVersion rootProject.ext.compileSdkVersion
buildToolsVersion rootProject.ext.buildToolsVersion
defaultConfig {
applicationId "com.codingwords.sobrien.demo"
minSdkVersion rootProject.ext.minSdkVersion
targetSdkVersion rootProject.ext.targetSdkVersion
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
javaCompileOptions {
annotationProcessorOptions {
arguments = ["room.schemaLocation": "$projectDir/schemas".toString()]
}
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
kapt { generateStubs = true }
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile "com.android.support:appcompat-v7:$rootProject.supportLibraryVersion"
compile 'com.android.support.constraint:constraint-layout:1.0.2'
compile "android.arch.persistence.room:runtime:$rootProject.architectureComponentsVersion"
kapt "android.arch.persistence.room:compiler:$rootProject.architectureComponentsVersion"
compile "android.arch.persistence.room:rxjava2:$rootProject.architectureComponentsVersion"
compile "io.reactivex.rxjava2:rxjava:$rootProject.rxjavaVersion"
compile "io.reactivex.rxjava2:rxandroid:$rootProject.rxandroidVersion"
compile "io.reactivex.rxjava2:rxkotlin:$rootProject.rxkotlinVersion"
compile "com.squareup.retrofit2:retrofit:$rootProject.retrofitVersion"
compile "com.squareup.retrofit2:converter-gson:$rootProject.retrofitVersion"
compile 'com.jakewharton.retrofit:retrofit2-rxjava2-adapter:1.0.0'
compile "com.squareup.okhttp3:okhttp:$rootProject.okhttpVersion"
compile "com.squareup.okhttp3:logging-interceptor:$rootProject.okhttpVersion"
compile 'com.google.code.gson:gson:2.8.0'
compile "com.google.dagger:dagger:$rootProject.daggerVersion"
kapt "com.google.dagger:dagger-compiler:$rootProject.daggerVersion"
provided 'org.glassfish:javax.annotation:10.0-b28'
compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
testCompile 'junit:junit:4.12'
}
buildscript {
ext.kotlin_version = '1.1.60'
repositories {
jcenter()
google()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.0.1'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}
Project level gradle
allprojects {
repositories {
jcenter()
google()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
ext {
minSdkVersion = 19
targetSdkVersion = 26
compileSdkVersion = 26
buildToolsVersion = "26.0.2"
supportLibraryVersion = "27.0.0"
architectureComponentsVersion = "1.0.0-rc1"
rxjavaVersion = "2.1.3"
rxandroidVersion = "2.0.1"
rxkotlinVersion = "2.1.0"
daggerVersion = "2.11"
retrofitVersion = "2.3.0"
okhttpVersion = "3.9.0"
}
