Intellij + Ajc + Lombok/Mapstruct

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

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

Answer 2

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>