/**
* Process a transition of an existing workflow instance.
*
* @param context the current transition context
* @return the new current transition context
* @throws TransitioningException when the workflow cannot be processed
*/
protected TransitionContext processTransition(TransitionContext context)
throws TransitioningException {
if (context == null) {
throw new IllegalArgumentException("Cannot process workflow for context [null].");
}
try {
WorkflowServiceLocator locator = new WorkflowServiceLocator();
WorkflowService service = locator.getService(null);
ServiceRequest<ProcessWorkflowRq> rq =
new ServiceRequest<ProcessWorkflowRq>(super.getContext());
ProcessWorkflowRq requestMessage = new ProcessWorkflowRq();
requestMessage.setInstanceId(context.getInstanceId());
requestMessage.setSignal(context.getSignal());
requestMessage.setComment(context.getComment());
requestMessage.getSubInstances().addAll(context.getSubInstances());
requestMessage.setContext(context.getWorkflowContext());
rq.setRequestMessage(requestMessage);
ServiceResponse<WorkflowResultRs> rs = service.processWorkflow(rq);
if (rs == null || rs.getResponseMessage() == null) {
throw new TransitioningException("Starting workflow did not finish successful.");
}
WorkflowResultRs responseMessage = rs.getResponseMessage();
TransitionContext newContext = new TransitionContext();
newContext.setInstanceId(responseMessage.getInstanceId());
newContext.setName(responseMessage.getWorkflowName());
newContext.setWorkflowContext(responseMessage.getContext());
newContext.setSignal(context.getSignal());
newContext.setStateName(responseMessage.getStateName());
newContext.getNextTransitions().addAll(responseMessage.getNextTransitions());
return newContext;
} catch (WorkflowException we) {
throw new TransitioningException(
"Error processing workflow with name "
+ context.getName()
+ " and id "
+ context.getInstanceId()
+ ".",
we);
} catch (Exception e) {
throw new TransitioningException(
"Unexpected error processing workflow with name "
+ context.getName()
+ " and id "
+ context.getInstanceId()
+ ".",
e);
}
}
/**
* Start a new workflow instance for the given workflow name.
*
* @param requestMessage the workflow init message
* @return the transition context
* @throws TransitioningException when the workflow cannot be started
*/
protected TransitionContext startWorkflow(InitWorkflowRq requestMessage)
throws TransitioningException {
if (requestMessage == null) {
throw new IllegalArgumentException("Cannot start workflow for request [null].");
}
Name name = requestMessage.getWorkflowName();
Description summary = requestMessage.getSummary();
if (name == null || name.getValue() == null || name.getValue().isEmpty()) {
throw new IllegalArgumentException("Cannot start workflow with name [null].");
}
if (summary == null || summary.getValue() == null || summary.getValue().isEmpty()) {
requestMessage.setSummary(new Description("Workflow '" + name + "'"));
}
try {
WorkflowServiceLocator locator = new WorkflowServiceLocator();
WorkflowService service = locator.getService(null);
ServiceRequest<InitWorkflowRq> rq = new ServiceRequest<InitWorkflowRq>(super.getContext());
rq.setRequestMessage(requestMessage);
ServiceResponse<WorkflowResultRs> rs = service.initWorkflow(rq);
if (rs == null || rs.getResponseMessage() == null) {
throw new TransitioningException("Starting workflow did not finish successful.");
}
WorkflowResultRs responseMessage = rs.getResponseMessage();
TransitionContext transitionContext = new TransitionContext();
transitionContext.setInstance(responseMessage.getInstance());
transitionContext.setInstanceId(responseMessage.getInstanceId());
transitionContext.setName(responseMessage.getWorkflowName());
transitionContext.setWorkflowContext(responseMessage.getContext());
transitionContext.getNextTransitions().addAll(responseMessage.getNextTransitions());
return transitionContext;
} catch (WorkflowException we) {
throw new TransitioningException("Error starting workflow with name " + name + ".", we);
} catch (Exception e) {
throw new TransitioningException(
"Unexpected error starting workflow with name " + name + ".", e);
}
}
