/** {@inheritDoc} */
@Override
public void handleMessage(Exchange exchange) throws HandlerException {
if (!ExchangePhase.IN.equals(exchange.getPhase())) {
return;
}
Context context = exchange.getContext();
ServiceOperation serviceOperation = exchange.getContract().getServiceOperation();
ProcessActionModel processActionModel = _actionModels.get(serviceOperation.getName());
ProcessActionType processActionType = getProcessActionType(context, processActionModel);
Message messageIn = exchange.getMessage();
Long processInstanceId = null;
ProcessInstance processInstance = null;
switch (processActionType) {
case START_PROCESS:
if (_processId != null) {
Object messageContentIn = messageIn.getContent();
if (messageContentIn != null) {
Map<String, Object> parameters = new HashMap<String, Object>();
parameters.put(_messageContentInName, messageContentIn);
processInstance = _ksession.startProcess(_processId, parameters);
} else {
processInstance = _ksession.startProcess(_processId);
}
processInstanceId = Long.valueOf(processInstance.getId());
} else {
throwNullParameterException(processActionType, PROCESS_ID_VAR);
}
break;
case SIGNAL_EVENT:
String processEventType = getProcessEventType(context, processActionModel);
Object processEvent = getProcessEvent(context, messageIn);
processInstanceId = getProcessInstanceId(context);
if (processInstanceId != null) {
_ksession.signalEvent(processEventType, processEvent, processInstanceId.longValue());
} else {
throwNullParameterException(processActionType, PROCESS_INSTANCE_ID_VAR);
}
break;
case ABORT_PROCESS_INSTANCE:
processInstanceId = getProcessInstanceId(context);
if (processInstanceId != null) {
_ksession.abortProcessInstance(processInstanceId.longValue());
} else {
throwNullParameterException(processActionType, PROCESS_INSTANCE_ID_VAR);
}
break;
}
if (processInstanceId != null) {
context.setProperty(PROCESS_INSTANCE_ID_VAR, processInstanceId, Scope.EXCHANGE);
ExchangePattern exchangePattern = serviceOperation.getExchangePattern();
if (ExchangePattern.IN_OUT.equals(exchangePattern)) {
if (processInstance == null) {
processInstance = _ksession.getProcessInstance(processInstanceId.longValue());
}
Message messageOut = exchange.createMessage();
Object messageContentOut = null;
if (processInstance != null) {
messageContentOut =
((WorkflowProcessInstance) processInstance).getVariable(_messageContentOutName);
}
if (messageContentOut != null) {
messageOut.setContent(messageContentOut);
}
exchange.send(messageOut);
}
}
}
/**
* Send a message hash to the specified operation.
*
* @param operationName The operation name.
* @param rubyHash The message hash.
* @return The response object if an IN_OUT operation was invoked, otherwise null.
* @throws Throwable An exception occurred while invoking the target operation.
*/
public Object send(String operationName, RubyHash rubyHash) throws Throwable {
if (operationName == null) {
throw new IllegalArgumentException("null 'operationName' argument.");
}
if (rubyHash == null) {
throw new IllegalArgumentException("null 'rubyHash' argument.");
}
ServiceOperation operation = _serviceReference.getInterface().getOperation(operationName);
if (operation == null) {
throw new IllegalArgumentException(
"Unknown operation name '"
+ operationName
+ "' on Service '"
+ _serviceReference.getName()
+ "'.");
}
// Clone the RubyHash to convert it to a normal Map based graph. This makes it possible
// to more safely transport the payload data out of the ruby app via a SwitchYard Exchange...
Map<String, Object> payload = deepClone(rubyHash);
// Create the exchange contract...
BaseExchangeContract exchangeContract = new BaseExchangeContract(operation);
// Set the input type...
exchangeContract
.getInvokerInvocationMetaData()
.setInputType(JavaService.toMessageType(payload.getClass()));
if (operation.getExchangePattern() == ExchangePattern.IN_OUT) {
final BlockingQueue<Exchange> responseQueue = new ArrayBlockingQueue<Exchange>(1);
AtomicReference<ExchangeHandler> responseExchangeHandler =
new AtomicReference<ExchangeHandler>(
new ExchangeHandler() {
public void handleMessage(Exchange exchange) throws HandlerException {
responseQueue.offer(exchange);
}
public void handleFault(Exchange exchange) {
responseQueue.offer(exchange);
}
});
Exchange exchange =
_serviceReference.createExchange(exchangeContract, responseExchangeHandler.get());
Message message = exchange.createMessage().setContent(payload);
exchange.send(message);
Exchange exchangeOut = null;
try {
exchangeOut = responseQueue.take();
} catch (InterruptedException e) {
throw new SwitchYardException(
"Operation '"
+ operationName
+ "' on Service '"
+ _serviceReference.getName()
+ "' interrupted.",
e);
}
if (exchangeOut.getState() == ExchangeState.OK) {
return exchangeOut.getMessage().getContent();
} else {
Object failureObj = exchangeOut.getMessage().getContent();
if (failureObj instanceof Throwable) {
if (failureObj instanceof InvocationTargetException) {
throw ((Throwable) failureObj).getCause();
} else {
throw (Throwable) failureObj;
}
} else {
throw new SwitchYardException(
"Service invocation failure. Service '"
+ _serviceReference.getName()
+ "', operation '"
+ operationName
+ "'. Non Throwable failure message payload: "
+ failureObj);
}
}
} else {
Exchange exchange = _serviceReference.createExchange(exchangeContract);
Message message = exchange.createMessage().setContent(payload);
exchange.send(message);
}
return null;
}
