Intellij + Ajc + Lombok/Mapstruct - intellij-idea

Question

I want to enable AspectJ compiler in my IntelliJ Idea as I have several aspects that I'd like to be woven during compile time.
At the same time, I am using Lombok and Mapstruct in my codebase.
Those 2 require additional annotations processing, that must happen before ajc kicks in.
I have both plugins installed for Lombok and Mapstruct. Independently they work fine, source code is being generated. But when I enable ajc and tick Enable annotation processing options, and then build a project, I get:
Error:(9, 0) ajc: Internal error in the mapping processor: java.lang.NullPointerException at org.aspectj.org.eclipse.jdt.internal.compiler.lookup.FieldBinding.sourceField(FieldBinding.java:425) at org.aspectj.org.eclipse.jdt.internal.compiler.apt.model.TypeElementImpl$SourceLocationComparator.determineSourceStart(TypeElementImpl.java:108) at org.aspectj.org.eclipse.jdt.internal.compiler.apt.model.TypeElementImpl$SourceLocationComparator.getSourceStart(TypeElementImpl.java:72) at org.aspectj.org.eclipse.jdt.internal.compiler.apt.model.TypeElementImpl$SourceLocationComparator.compare(TypeElementImpl.java:65) at org.aspectj.org.eclipse.jdt.internal.compiler.apt.model.TypeElementImpl$SourceLocationComparator.compare(TypeElementImpl.java:1) at java.util.TimSort.countRunAndMakeAscending(TimSort.java:360) at java.util.TimSort.sort(TimSort.java:234) at java.util.Arrays.sort(Arrays.java:1512) at java.util.ArrayList.sort(ArrayList.java:1462) at java.util.Collections.sort(Collections.java:175) at org.aspectj.org.eclipse.jdt.internal.compiler.apt.model.TypeElementImpl.getEnclosedElements(TypeElementImpl.java:166) at org.mapstruct.ap.internal.util.workarounds.SpecificCompilerWorkarounds.replaceTypeElementIfNecessary(SpecificCompilerWorkarounds.java:99) at org.mapstruct.ap.internal.util.Executables.getAllEnclosedExecutableElements(Executables.java:99) at org.mapstruct.ap.internal.model.common.Type.getAllMethods(Type.java:633) at org.mapstruct.ap.internal.model.common.Type.getPropertyReadAccessors(Type.java:496) at org.mapstruct.ap.internal.model.BeanMappingMethod$Builder.build(BeanMappingMethod.java:168) at org.mapstruct.ap.internal.processor.MapperCreationProcessor.getMappingMethods(MapperCreationProcessor.java:376) at org.mapstruct.ap.internal.processor.MapperCreationProcessor.getMapper(MapperCreationProcessor.java:151) at org.mapstruct.ap.internal.processor.MapperCreationProcessor.process(MapperCreationProcessor.java:122) at org.mapstruct.ap.internal.processor.MapperCreationProcessor.process(MapperCreationProcessor.java:76) at org.mapstruct.ap.MappingProcessor.process(MappingProcessor.java:283) at org.mapstruct.ap.MappingProcessor.processMapperTypeElement(MappingProcessor.java:263) at org.mapstruct.ap.MappingProcessor.processMapperElements(MappingProcessor.java:221) at org.mapstruct.ap.MappingProcessor.process(MappingProcessor.java:156) at org.aspectj.org.eclipse.jdt.internal.compiler.apt.dispatch.RoundDispatcher.handleProcessor(RoundDispatcher.java:139) at org.aspectj.org.eclipse.jdt.internal.compiler.apt.dispatch.RoundDispatcher.round(RoundDispatcher.java:121) at org.aspectj.org.eclipse.jdt.internal.compiler.apt.dispatch.BaseAnnotationProcessorManager.processAnnotations(BaseAnnotationProcessorManager.java:159) at org.aspectj.org.eclipse.jdt.internal.compiler.Compiler.processAnnotations(Compiler.java:931) at org.aspectj.org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:437) at org.aspectj.org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:417) at org.aspectj.ajdt.internal.core.builder.AjBuildManager.performCompilation(AjBuildManager.java:1036) at org.aspectj.ajdt.internal.core.builder.AjBuildManager.performBuild(AjBuildManager.java:272) at org.aspectj.ajdt.internal.core.builder.AjBuildManager.batchBuild(AjBuildManager.java:185) at com.intellij.lang.aspectj.build.AjJpsCompiler.doBuild(AjJpsCompiler.java:249) at com.intellij.lang.aspectj.build.AjJpsCompiler.build(AjJpsCompiler.java:119) at com.intellij.lang.aspectj.build.AjTranslatingBuilder.doBuild(AjTranslatingBuilder.java:114) at com.intellij.lang.aspectj.build.AjBuilderBase.build(AjBuilderBase.java:74) at org.jetbrains.jps.incremental.IncProjectBuilder.runModuleLevelBuilders(IncProjectBuilder.java:1328) at org.jetbrains.jps.incremental.IncProjectBuilder.runBuildersForChunk(IncProjectBuilder.java:1008) at org.jetbrains.jps.incremental.IncProjectBuilder.buildTargetsChunk(IncProjectBuilder.java:1075) at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunkIfAffected(IncProjectBuilder.java:969) at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunks(IncProjectBuilder.java:798) at org.jetbrains.jps.incremental.IncProjectBuilder.runBuild(IncProjectBuilder.java:380) at org.jetbrains.jps.incremental.IncProjectBuilder.build(IncProjectBuilder.java:178) at org.jetbrains.jps.cmdline.BuildRunner.runBuild(BuildRunner.java:139) at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:302) at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:135) at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler.lambda$channelRead0$0(BuildMain.java:228) at org.jetbrains.jps.service.impl.SharedThreadPoolImpl.lambda$executeOnPooledThread$0(SharedThreadPoolImpl.java:42) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)
Also, I see a bunch of other ajc compilation errors as it is not able to locate methods that should've been generated by the Lombok.
How do I solve these issues?

Answer 1

Hi I had similar issue.
The fix was to let aspectj-maven-plugin to only start weaving after classes are compiled.
It describes in more detail here https://www.mojohaus.org/aspectj-maven-plugin/examples/weaveDirectories.html
I needed to:
(1) Specify folder where already compiled classes will be via <weaveDirectories >
(2) Change the phase of maven-compiler-plugin lifecycle to be run "process-classes" or later.
This is how my pom looked like.
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<annotationProcessorPaths>
<path>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${mapstruct.version}</version>
</path>
<path>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${org.projectlombok.version}</version>
</path>
</annotationProcessorPaths>
<compilerArgs>
<compilerArg>-Amapstruct.defaultComponentModel="spring"</compilerArg>
<compilerArg>-Amapstruct.unmappedTargetPolicy=ERROR</compilerArg>
<compilerArg>-Amapstruct.suppressGeneratorTimestamp=true</compilerArg>
<compilerArg>-Amapstruct.suppressGeneratorVersionInfoComment=true</compilerArg>
</compilerArgs>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>aspectj-maven-plugin</artifactId>
<configuration>
<showWeaveInfo>${showWeaveInfo}</showWeaveInfo>
<showWeaveInfo>true</showWeaveInfo>
<Xlint>ignore</Xlint>
<complianceLevel>${java.compiler.version}</complianceLevel>
<encoding>UTF-8</encoding>
<verbose>false</verbose>
<verbose>true</verbose>
<forceAjcCompile>true</forceAjcCompile>
<sources/>
<weaveDirectories>
<weaveDirectory>${project.build.directory}/classes</weaveDirectory>
</weaveDirectories>
<aspectLibraries>
<aspectLibrary>
<groupId>com.lib.test</groupId>
<artifactId>test1</artifactId>
</aspectLibrary>
<aspectLibrary>
<groupId>com.lib.test2</groupId>
<artifactId>test2</artifactId>
</aspectLibrary>
</aspectLibraries>
</configuration>
<executions>
<execution>
<phase>process-classes</phase>
<goals>
<goal>compile</goal>
<goal>test-compile</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjtools</artifactId>
<version>${aspectj.version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>${aspectj.version}</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>

Answer 2

Enabling Post-compile weave mode in IntelliJ solved it for me (https://www.jetbrains.com/help/idea/using-the-aspectj-ajc-compiler.html).

Answer 3

if you have aspect sources with the same project then you should add a few line codes to the #jun-huh answers and delete <aspectLibraries>. The below pom.xml is for if you use your aspects with the same project.
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>az.sanco</groupId>
<artifactId>aspect</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.9.7</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.22</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>aspectj-maven-plugin</artifactId>
<version>1.14.0</version>
<configuration>
<forceAjcCompile>true</forceAjcCompile>
<weaveDirectories>
<weaveDirectory>${project.build.outputDirectory}</weaveDirectory>
</weaveDirectories>
<complianceLevel>1.8</complianceLevel>
<source>1.8</source>
<target>1.8</target>
<proc>none</proc><!-- annotation process already finished, so we don't need to run again-->
</configuration>
<executions>
<execution>
<id>copy-only-aspect-files</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
<configuration>
<!--when `javac` compile works it does not copy *.aj files to the
output directory. We need to run `ajc` compile during `compile` phase and
copy only *.aj files to weave our classes-->
<includes>
<include>**/*.aj</include><!--IMPORTANT-->
</includes>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>