[jboss-user] [JBoss jBPM] - Re: Fetching Task Variable Instances (Early Loading)

[bradsdavis]

Yeah, my suggestion here is the following.

First, I dont think this is as efficient as it should be.  However, this is my suggestion at the most efficient result.

Create a DTO that includes the values you want in the grid.  Then do a HQL query to fetch the task instance.  The key is to make the variable local to the task instance so that it can be pulled in a eager fashion.

So, when you create your task, just add a controller that copies the value from the process instance to the task.  That is equivalent to creating a variable locally on the task instance.

So, then you need to fetch the variable eagerly.


  | "select task from org.jbpm.taskmgmt.exe.TaskInstance task fetch all properties left join fetch task.variableInstances varInstance"
  | 

When you are populating your DTO from your TaskInstance objects gathered in the HQL query, make sure you say "getVariableLocally("variableName") rather than the getVariable method.  That is crucial.

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