Hi,
I want to display a list of running process instances in my UI, and here's what I did:
Called runtimeService.createProcessInstanceQuery().list();
For each of them
{
called repositoryService.findProcessDefinitionById(processInstance.getProcessDefinitionId()) to get the definition name.
called processInstance.findActiveActivityIds()
}
In the last line, I get an exception as follows:
Caused by: java.lang.NullPointerException
at org.activiti.engine.impl.runtime.ExecutionEntity.ensureProcessDefinitionInitialized(ExecutionEntity.java:195)
at org.activiti.pvm.impl.runtime.ExecutionImpl.getProcessDefinition(ExecutionImpl.java:296)
at org.activiti.engine.impl.runtime.ExecutionEntity.ensureActivityInitialized(ExecutionEntity.java:235)
at org.activiti.pvm.impl.runtime.ExecutionImpl.collectActiveActivityIds(ExecutionImpl.java:274)
at org.activiti.pvm.impl.runtime.ExecutionImpl.findActiveActivityIds(ExecutionImpl.java:269)
…
Note: this was the first thing requested from the engine when the process is run.
By looking at the code, I guess this happens when the process definition is loaded in a way that doesn't parse the process definition. When we call findActiveActivityIds it tries to load and parse the definition too. I guess (I'm not sure) that CommandContext.getCurrent() is returning null when called in this context.
Should I add this to JIRA?
And is there a better way to do what I was doing originally?
