Axon Plugin update causing issues in Intellij idea community version

[muhmmad-farooq]

Basic information

• JDK version: JDK 8, JDK 11, JDK 14
• Complete executable reproducer if available (e.g. GitHub Repo): NA

Steps to reproduce

Just right after updating to 0.9.3 version of this plugin, the arrows which indicate and take you to command, event, event sourcing and query handlers are now not showing to the left side from where we would be able to click and go to the handlers in one click. These arrows are now missing. It gives some error report for error which is as below:

Caused by: java.lang.NullPointerException
at org.axonframework.intellij.ide.plugin.usage.AxonVersionService.extractVersion(AxonVersionService.kt:169)
at org.axonframework.intellij.ide.plugin.usage.AxonVersionService.getAxonVersions(AxonVersionService.kt:150)
at org.axonframework.intellij.ide.plugin.usage.AxonVersionService.runCheck(AxonVersionService.kt:49)
at org.axonframework.intellij.ide.plugin.usage.AxonVersionService.(AxonVersionService.kt:45)
at java.base/java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:733)
at com.intellij.platform.instanceContainer.instantiation.InstantiateKt.instantiate$lambda$0(instantiate.kt:47)
at com.intellij.platform.instanceContainer.instantiation.InstantiateKt.instantiate$lambda$8$lambda$7(instantiate.kt:289)
at com.intellij.platform.instanceContainer.instantiation.InstantiateKt.withStoredTemporaryContext(instantiate.kt:306)
at com.intellij.platform.instanceContainer.instantiation.InstantiateKt.instantiate(instantiate.kt:288)
at com.intellij.platform.instanceContainer.instantiation.InstantiateKt.instantiate(instantiate.kt:40)
at com.intellij.serviceContainer.ServiceInstanceInitializer.createInstance$suspendImpl(ServiceInstanceInitializer.kt:30)
... 127 more
this is the last most part of stack trace. I tried to submit the report multiple times but sometimes it says submission failed. Kindly look into this issue

Expected behaviour

The pointing arrows should show up.

Actual behaviour

The pointing arrows for command, event, event sourcing and query handlers are not showing

[CodeDrivenMitch]

Hey @muhmmad-farooq , thanks for reporting the issue.
I have tracked the issue back to us expecting versions of Axon Framework dependency to follow semantic versioning.
If not, this causes a NPE. I have adjusted this code in #333 and plan to release this as soon as it's reviewed.