Description Cristiano Gaviao 2021-03-21 09:14:02 EDT

I've created my own annotation processor. I'm using maven as build tool.

But I can't use it within other projects if the processor project  are opened in the workspace.

When I close the processor project and then call "maven/update project" then eclipse recognizes it and adds it to the factory path. But it fails if any of its dependencies source project are also opened in the workspace. Eclipse complains about a missing class:
```

org.eclipse.jdt.apt.pluggable.core
Error
Sun Mar 21 08:42:50 BRT 2021
Unable to create instance of annotation processor br.com.c8tech.hawkx.dev.apt.processors.HealthCheckServiceAnnotationProcessor

java.lang.NoClassDefFoundError: br/com/c8tech/hawkx/api/annotations/HealthCheckTag
	at br.com.c8tech.hawkx.dev.apt.processors.HealthCheckServiceAnnotationProcessor.<init>(HealthCheckServiceAnnotationProcessor.java:21)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
	at java.base/java.lang.Class.newInstance(Class.java:584)
	at org.eclipse.jdt.apt.core.internal.ClassServiceFactory.newInstance(ClassServiceFactory.java:30)
	at org.eclipse.jdt.internal.apt.pluggable.core.dispatch.IdeAnnotationProcessorManager.discoverNextProcessor(IdeAnnotationProcessorManager.java:96)
	at org.eclipse.jdt.internal.compiler.apt.dispatch.RoundDispatcher.round(RoundDispatcher.java:119)
	at org.eclipse.jdt.internal.compiler.apt.dispatch.BaseAnnotationProcessorManager.processAnnotations(BaseAnnotationProcessorManager.java:171)
	at org.eclipse.jdt.internal.apt.pluggable.core.dispatch.IdeAnnotationProcessorManager.processAnnotations(IdeAnnotationProcessorManager.java:138)
	at org.eclipse.jdt.internal.compiler.Compiler.processAnnotations(Compiler.java:988)
	at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:450)
	at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:426)
	at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:377)
	at org.eclipse.jdt.internal.core.builder.IncrementalImageBuilder.compile(IncrementalImageBuilder.java:371)
	at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:309)
	at org.eclipse.jdt.internal.core.builder.IncrementalImageBuilder.incrementalBuildLoop(IncrementalImageBuilder.java:190)
	at org.eclipse.jdt.internal.core.builder.IncrementalImageBuilder.build(IncrementalImageBuilder.java:147)
	at org.eclipse.jdt.internal.core.builder.JavaBuilder.buildDeltas(JavaBuilder.java:289)
	at org.eclipse.jdt.internal.core.builder.JavaBuilder.build(JavaBuilder.java:212)
	at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:846)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:229)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:277)
	at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:330)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:333)
	at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:385)
	at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:406)
	at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:154)
	at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:244)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

```
A temporary workaround is to add the required dependency manually to the FactoryPath, but the added jar will disappear in the next "maven/ update project".

Another workaround is to close the dependency project together with the processor one, but it is a pain to have to open the api project every time I need to change it, close it and then update all project the uses the processor.