.buildProcessDefinition();
PvmProcessInstance processInstance = processDefinition.createProcessInstance();
processInstance.setVariable("amount", 500L);
processInstance.setVariable("msg", "hello world");
processInstance.start();
assertEquals(500L, processInstance.getVariable("amount"));
assertEquals("hello world", processInstance.getVariable("msg"));
PvmExecution activityInstance = processInstance.findExecution("a");