BusinessKey is null for Executions

[vicziani]

I have a workflow with two User Task after a Parallel Gateway. I start the process with a BusinessKey. After that I have three executions. The BusinessKey of the execution of the parallel gateway is ok, but the BusinessKeys of the two User Tasks are null.

Is it normal?

[frederikherema1]

What about the "getProcessBusinessKey()" on the DelegateExecution? This should return the business-key set at the beginning not the process… The getBusinessKey() will only work if the execution you're using is the process-instance itself.


/** The business key for this execution. Only returns a value if the delegate execution
   * is a process instance.
   * 
   * @deprecated use {@link #getProcessBusinessKey()} to get the business key for the process
   *             associated with this execution, regardless whether or not this execution is a
   *             process-instance.
   */
  String getBusinessKey();


[vicziani]

getProcessBusinessKey throws NullPointerException.

java.lang.NullPointerException
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.ensureProcessInstanceInitialized(ExecutionEntity.java:669)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.getProcessInstance(ExecutionEntity.java:663)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.getProcessBusinessKey(ExecutionEntity.java:624)

And I cannot query the other executions with createExecutionQuery().processInstanceBusinessKey(), because their business key is null. I think the executions after the parallelgateway should be equals the businesskey of the parallelgateway.

What about the "getProcessBusinessKey()" on the DelegateExecution? This should return the business-key set at the beginning not the process… The getBusinessKey() will only work if the execution you're using is the process-instance itself.


/** The business key for this execution. Only returns a value if the delegate execution
   * is a process instance.
   * 
   * @deprecated use {@link #getProcessBusinessKey()} to get the business key for the process
   *             associated with this execution, regardless whether or not this execution is a
   *             process-instance.
   */
  String getBusinessKey();


[frederikherema1]

The null pointer is due to the fact you're nog using the execution inside activiti context (e.g.. JavaDelegate, listener) but rater just use the pogo that comes out of a query.

The query-method you are referring to only selects process-instances which have the given business key set. Since a business-key is a unique identifier for a single process-instance (also enforced on db-level), it doesn't make sense setting the BUSINESS_KEY_ field on the child executions as well (defeats the purpose).

If you want all child-executions of the process-instances with a given business-key, use this approach:


ProcessInstance pi  = runtime.createProcessInstanceQuery().processInstanceBusinessKey("myKey").singleResult();
List<Execution> executions = runtime.createExecutionQuery().processInstanceId(pi.getId().list();


[vicziani]

Thank you very much, understood, this works for me!