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Bug Report
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Resolution: Cannot Reproduce
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L3 - Default
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None
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7.10.3
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None
Hello,
In order to use my own task and execution listener i had to remove @EnableProcessApplication annotation from my springboot application and define my own configuration extending SpringBootProcessApplication like:
@Configuration public class EngineConfiguration extends SpringBootProcessApplication { @Override public TaskListener getTaskListener() { System.out.println("I am here!"); return super.getTaskListener(); } @Override public ExecutionListener getExecutionListener() { System.out.println("I am here!"); return super.getExecutionListener(); } }
the issue is this below exception:
java.lang.IllegalStateException: Failed to load ApplicationContext at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:125) at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:108) at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:190) at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:132) at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:246) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:246) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) Caused by: java.lang.RuntimeException: java.lang.ClassCastException: java.util.Optional cannot be cast to java.lang.String at org.camunda.bpm.engine.spring.application.SpringProcessApplication.onApplicationEvent(SpringProcessApplication.java:104) at org.camunda.bpm.engine.spring.application.SpringProcessApplication.onApplicationEvent(SpringProcessApplication.java:51) at com.td.tds.veritas.security.rivendell.engine.EngineConfiguration$$EnhancerBySpringCGLIB$$a0dde9c7.onApplicationEvent(<generated>) at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:398) at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:355) at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:882) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:127) at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99) at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:117) ... 24 more Caused by: java.lang.ClassCastException: java.util.Optional cannot be cast to java.lang.String at java.util.Optional.ifPresent(Optional.java:159) at org.camunda.bpm.spring.boot.starter.SpringBootProcessApplication.afterPropertiesSet(SpringBootProcessApplication.java:85) at org.camunda.bpm.engine.spring.application.SpringProcessApplication.onApplicationEvent(SpringProcessApplication.java:95) ... 39 more
looks like that the attribute springApplicationName in SpringBootProcessApplication class resolves to Optional<Optional<String>> instead of Optional<String> which causes the above exception, i am not sure whether this is the spring issue or not, but i workaround it by reassigning the springApplicationName:
@Configuration public class EngineConfiguration extends SpringBootProcessApplication { ... @Override public void afterPropertiesSet() throws Exception { springApplicationName = Optional.empty(); super.afterPropertiesSet(); } }
setting application-name in application.properties didn't help.
my fix is not the best fix so i'd appreciate if you could look into this.
Thank you,
Hazhir
This is the controller panel for Smart Panels app
[CAM-9971] SpringBootProcessApplication attribute resolves to Optiona<Optional<String>>
Hi hazhir,
In the latest snapshot of the Camunda Spring Boot Starter, you can use the camunda.bpm.generate-unique-process-application-name=true to generate a unique name for the Process Application. I believe that the logic there will override the Optional<Optional<String>> problem you are facing.
Does this fix your problem?
Best,
Nikola
Hi Nikola,
Thank you for your response.
I haven't had a chance to do more debugging on this issue, but it seems that @Value is resolved by Spring, unless Camunda is overriding the functionality which you should know better 
I tried the proposed approach and got the same class cast exception.
Any other idea?
Regards,
Hazhir
Hi hazhir,
Sorry for the long delay.
I have been trying to replicate your issue but without success. Do you happen to have an example project that you can provide so that I can reproduce the problem and test it?
Best,
Nikola
I'm closing this ticket due to inactivity. Feel free to re-open it if you have some new data.
Hi hazhir,
Thank you for the provided information.
Have you been able to discover where exactly the springApplicationName resolves to Optional<Optional<String>>?
It's strange that this happens only when the SpringBootProcessApplication class is extended.
Best,
Nikola