Thanks for your answer it helped a bit...
but what is the best Approach to get Task Information for building Remote Task UI? Any Example? Do i have to put all Variables in inputData or in Content with a Map ?
And the result of
List<TaskSummary> tasksAssignedAsPotentialOwner = client.getTasksAssignedAsPotentialOwner("admin", "en-UK");
don't show all actual Tasks. In gwt-consol i see actualy even more tasks ( for "admin" ) than in HornetQClient.