public Promise<String> startChildWorkflow(String workflow, String version, String input) {
StartChildWorkflowExecutionParameters parameters = new StartChildWorkflowExecutionParameters();
WorkflowType workflowType = new WorkflowType().withName(workflow).withVersion(version);
parameters.setWorkflowType(workflowType);
parameters.setInput(input);
Settable<StartChildWorkflowReply> reply = new Settable<StartChildWorkflowReply>();
Settable<String> result = new Settable<String>();
startChildWorkflow(parameters, reply, result);
return result;
}
@Override
protected void doCatch(Throwable e) throws Throwable {
failed = true;
if (e instanceof WorkflowException) {
WorkflowException we = (WorkflowException) e;
throw new ChildWorkflowFailedException(
0, childExecution, parameters.getWorkflowType(), e.getMessage(), we.getDetails());
} else if (e instanceof CancellationException) {
throw e;
}
// Unless there is problem in the framework or generic workflow implementation this shouldn't
// be executed
Exception failure =
new ChildWorkflowFailedException(
0, childExecution, parameters.getWorkflowType(), e.getMessage(), "null");
failure.initCause(e);
throw failure;
}
private void startChildWorkflow(
final StartChildWorkflowExecutionParameters parameters,
final Settable<StartChildWorkflowReply> reply,
final Settable<String> result) {
String workflowId = parameters.getWorkflowId();
WorkflowType workflowType = parameters.getWorkflowType();
WorkflowExecution childExecution = new WorkflowExecution();
final String runId = UUID.randomUUID().toString();
// TODO: Validate parameters against registration options to find missing timeouts or other
// options
try {
DecisionContext parentDecisionContext = decisionContextProvider.getDecisionContext();
if (workflowId == null) {
workflowId =
decisionContextProvider.getDecisionContext().getWorkflowClient().generateUniqueId();
}
childExecution.setWorkflowId(workflowId);
childExecution.setRunId(runId);
final GenericActivityClient activityClient = parentDecisionContext.getActivityClient();
final WorkflowClock workflowClock = parentDecisionContext.getWorkflowClock();
WorkflowDefinitionFactory factory;
if (factoryFactory == null) {
throw new IllegalStateException("required property factoryFactory is null");
}
factory = factoryFactory.getWorkflowDefinitionFactory(workflowType);
if (factory == null) {
String cause =
StartChildWorkflowExecutionFailedCause.WORKFLOW_TYPE_DOES_NOT_EXIST.toString();
throw new StartChildWorkflowFailedException(0, childExecution, workflowType, cause);
}
TestWorkflowContext workflowContext = new TestWorkflowContext();
workflowContext.setWorkflowExecution(childExecution);
workflowContext.setWorkflowType(parameters.getWorkflowType());
workflowContext.setParentWorkflowExecution(
parentDecisionContext.getWorkflowContext().getWorkflowExecution());
workflowContext.setTagList(parameters.getTagList());
workflowContext.setTaskList(parameters.getTaskList());
DecisionContext context =
new TestDecisionContext(
activityClient, TestGenericWorkflowClient.this, workflowClock, workflowContext);
// this, parameters, childExecution, workflowClock, activityClient);
final WorkflowDefinition childWorkflowDefinition = factory.getWorkflowDefinition(context);
final ChildWorkflowTryCatchFinally tryCatch =
new ChildWorkflowTryCatchFinally(
parameters, childExecution, childWorkflowDefinition, context, result);
workflowContext.setRootTryCatch(tryCatch);
ChildWorkflowTryCatchFinally currentRun = workflowExecutions.get(workflowId);
if (currentRun != null) {
String cause = StartChildWorkflowExecutionFailedCause.WORKFLOW_ALREADY_RUNNING.toString();
throw new StartChildWorkflowFailedException(0, childExecution, workflowType, cause);
}
workflowExecutions.put(workflowId, tryCatch);
continueAsNewWorkflowExecution(tryCatch, result);
} catch (StartChildWorkflowFailedException e) {
throw e;
} catch (Throwable e) {
// This cause is chosen to represent internal error for sub-workflow creation
String cause = StartChildWorkflowExecutionFailedCause.OPEN_CHILDREN_LIMIT_EXCEEDED.toString();
StartChildWorkflowFailedException failure =
new StartChildWorkflowFailedException(0, childExecution, workflowType, cause);
failure.initCause(e);
throw failure;
} finally {
reply.set(new StartChildWorkflowReplyImpl(result, runId));
}
}
@Override
protected void doTry() throws Throwable {
executeResult.chain(childWorkflowDefinition.execute(parameters.getInput()));
}