public void start() throws MuleException {
// TODO If Service is uninitialised when start is called should we initialise
// or throw an exception?
if (!initialised.get()) {
throw new IllegalStateException("Cannot start an unitialised service.");
}
if (isStarted()) {
logger.info("Service is already started: " + name);
} else {
if (initialState.equals(AbstractService.INITIAL_STATE_STOPPED)) {
logger.info("stopped");
}
if (!beyondInitialState.get() && initialState.equals(AbstractService.INITIAL_STATE_STOPPED)) {
logger.info("Service " + name + " has not been started (initial state = 'stopped')");
} else if (!beyondInitialState.get()
&& initialState.equals(AbstractService.INITIAL_STATE_PAUSED)) {
start(/*startPaused*/ true);
logger.info("Service " + name + " has been started and paused (initial state = 'paused')");
} else {
start(/*startPaused*/ false);
logger.info("Service " + name + " has been started successfully");
}
beyondInitialState.set(true);
}
}
public void stop() throws MuleException {
if (!stopped.get()) {
logger.debug("Stopping Service");
stopping.set(true);
fireServiceNotification(ServiceNotification.SERVICE_STOPPING);
// Unregister Listeners for the service
unregisterListeners();
// Resume if paused. (This is required so that stop() doesn't hand and so
// message aren't lost in SedaQueue when service is stopped.
if (isPaused()) {
resume();
}
doStop();
// Stop component. We do this here in case there are any queues that need to be consumed
// first.
component.stop();
stopped.set(true);
fireServiceNotification(ServiceNotification.SERVICE_STOPPED);
logger.info("Mule Service " + name + " has been stopped successfully");
}
}
public void forceStop() throws MuleException {
if (!stopped.get()) {
logger.debug("Stopping Service");
stopping.set(true);
fireServiceNotification(ServiceNotification.SERVICE_STOPPING);
doForceStop();
stopped.set(true);
stopping.set(false);
fireServiceNotification(ServiceNotification.SERVICE_STOPPED);
}
}
/**
* Initialise the service. The service will first create a Mule UMO from the UMODescriptor and
* then initialise a pool based on the attributes in the UMODescriptor.
*
* @throws org.mule.api.lifecycle.InitialisationException if the service fails to initialise
*/
public final synchronized void initialise() throws InitialisationException {
if (initialised.get()) {
throw new InitialisationException(
CoreMessages.objectAlreadyInitialised("Service '" + name + "'"), this);
}
// Ensure Component has service instance and is initialised. If the component
// was configured with spring and is therefore in the registry it will get
// started automatically, if it was set on the service directly then it won't
// be started automatically. So to be sure we start it here.
component.setService(this);
component.initialise();
if (inboundRouter == null) {
// Create Default routes that route to the default inbound and
// outbound endpoints
inboundRouter = new DefaultInboundRouterCollection();
// TODO MULE-2102 This should be configured in the default template.
inboundRouter.addRouter(new InboundPassThroughRouter());
}
if (outboundRouter == null) {
outboundRouter = new DefaultOutboundRouterCollection();
// TODO MULE-2102 This should be configured in the default template.
outboundRouter.addRouter(new OutboundPassThroughRouter());
}
if (responseRouter == null) {
responseRouter = new DefaultResponseRouterCollection();
}
if (exceptionListener == null) {
// By default us the model Exception Listener
exceptionListener = getModel().getExceptionListener();
// // TODO MULE-2102 This should be configured in the default template.
// exceptionListener = new DefaultServiceExceptionStrategy(this);
// ((MuleContextAware) exceptionListener).setMuleContext(muleContext);
// ((Initialisable) exceptionListener).initialise();
}
doInitialise();
// initialise statistics
stats = createStatistics();
stats.setEnabled(muleContext.getStatistics().isEnabled());
muleContext.getStatistics().add(stats);
stats.setOutboundRouterStat(outboundRouter.getStatistics());
stats.setInboundRouterStat(inboundRouter.getStatistics());
stats.setComponentStat(component.getStatistics());
initialised.set(true);
fireServiceNotification(ServiceNotification.SERVICE_INITIALISED);
}
public final void dispose() {
try {
if (!stopped.get()) {
stop();
}
} catch (MuleException e) {
// TODO MULE-863: If this is an error, do something!
logger.error("Failed to stop service: " + name, e);
}
doDispose();
component.dispose();
initialised.set(false);
fireServiceNotification(ServiceNotification.SERVICE_DISPOSED);
muleContext.getStatistics().remove(stats);
}
public final synchronized void connect() throws Exception {
// This method may be called to ensure transport is connected, if it is
// already connected then just return.
if (connected.get()) {
return;
}
if (disposed.get()) {
throw new IllegalStateException(
"Requester/dispatcher has been disposed; cannot connect to resource");
}
retryTemplate.execute(
new RetryCallback() {
public void doWork(RetryContext context) throws Exception {
try {
doConnect();
connected.set(true);
if (startOnConnect) {
start();
}
} catch (Exception e) {
if (logger.isDebugEnabled()) {
logger.debug(e);
}
throw e;
}
}
public String getWorkDescription() {
return getConnectionDescription();
}
},
getWorkManager());
}
public void dispatchEvent(MuleEvent event) throws MuleException {
if (stopping.get() || stopped.get()) {
throw new ServiceException(CoreMessages.componentIsStopped(name), event.getMessage(), this);
}
// Dispatching event to an inbound endpoint
// in the DefaultMuleSession#dispatchEvent
ImmutableEndpoint endpoint = event.getEndpoint();
if (endpoint instanceof OutboundEndpoint) {
try {
((OutboundEndpoint) endpoint).dispatch(event);
} catch (Exception e) {
throw new DispatchException(event.getMessage(), event.getEndpoint(), e);
}
return;
}
if (logger.isDebugEnabled()) {
logger.debug(
"Service: "
+ name
+ " has received asynchronous event on: "
+ event.getEndpoint().getEndpointURI());
}
// Dispatching event to the service
if (stats.isEnabled()) {
stats.incReceivedEventASync();
}
doDispatch(event);
}
public void stop() throws MuleException {
if (!stopped.get()) {
logger.debug("Stopping Service");
stopping.set(true);
fireServiceNotification(ServiceNotification.SERVICE_STOPPING);
// Unregister Listeners for the service
unregisterListeners();
component.stop();
doStop();
stopped.set(true);
fireServiceNotification(ServiceNotification.SERVICE_STOPPED);
logger.info("Mule Service " + name + " has been stopped successfully");
}
}
public void start() throws MuleException {
lifecycleManager.checkPhase(Startable.PHASE_NAME);
if (!beyondInitialState.get() && initialState.equals(AbstractService.INITIAL_STATE_STOPPED)) {
logger.info("Service " + name + " has not been started (initial state = 'stopped')");
beyondInitialState.set(true);
return;
}
// Ensure Component is started. If component was configured with spring and
// is therefore in the registry it will get started automatically, if it was
// set on the service directly then it won't be started automatically. So to
// be sure we start it here.
component.start();
// Create the receivers for the service but do not start them yet.
registerListeners();
// We connect the receivers _before_ starting the service because there may
// be
// some initialization required for the service which needs to have them
// connected.
// For example, the org.mule.transport.soap.glue.GlueMessageReceiver adds
// InitialisationCallbacks within its doConnect() method (see MULE-804).
connectListeners();
if (!beyondInitialState.get() && initialState.equals(AbstractService.INITIAL_STATE_PAUSED)) {
lifecycleManager.fireLifecycle(Startable.PHASE_NAME);
lifecycleManager.fireLifecycle(Pausable.PHASE_NAME);
logger.info("Service " + name + " has been started and paused (initial state = 'paused')");
} else {
lifecycleManager.fireLifecycle(Startable.PHASE_NAME);
logger.info("Service " + name + " has been started successfully");
}
beyondInitialState.set(true);
// We start the receivers _after_ starting the service because if a message
// gets routed to the service before it is started,
// org.mule.model.AbstractComponent.dispatchEvent() will throw a
// ServiceException with message COMPONENT_X_IS_STOPPED (see MULE-526).
startListeners();
}
/** Template method to destroy any resources held by the Message Dispatcher */
public synchronized void dispose() {
if (!disposed.get()) {
try {
this.disconnect();
this.stop();
} catch (Exception e) {
// TODO MULE-863: What should we really do?
logger.warn(e.getMessage(), e);
}
}
}
/**
* Determines if the expression is valid or not. This method will validate a single expression or
* expressions embedded in a string. the expression must be well formed i.e. #[bean:user]
*
* @param expression the expression to validate
* @return true if the expression evaluator is recognised
*/
public boolean isValidExpression(String expression) {
final AtomicBoolean valid = new AtomicBoolean(true);
final AtomicBoolean match = new AtomicBoolean(false);
final StringBuffer message = new StringBuffer();
parser.parse(
new TemplateParser.TemplateCallback() {
public Object match(String token) {
match.set(true);
if (token.indexOf(":") == -1) {
if (valid.get()) {
valid.compareAndSet(true, false);
}
message.append(token).append(" is malformed\n");
}
return null;
}
},
expression);
if (message.length() > 0) {
logger.warn("Expression " + expression + " is malformed: " + message.toString());
}
return match.get() && valid.get();
}
/**
* Starts a Mule Service.
*
* @param startPaused - Start service in a "paused" state (messages are received but not
* processed).
*/
protected void start(boolean startPaused) throws MuleException {
// Ensure Component is started. If component was configured with spring and
// is therefore in the registry it will get started automatically, if it was
// set on the service directly then it won't be started automatically. So to
// be sure we start it here.
component.start();
// Create the receivers for the service but do not start them yet.
registerListeners();
// We connect the receivers _before_ starting the service because there may
// be
// some initialization required for the service which needs to have them
// connected.
// For example, the org.mule.transport.soap.glue.GlueMessageReceiver adds
// InitialisationCallbacks within its doConnect() method (see MULE-804).
connectListeners();
// Start (and pause) the service.
if (stopped.get()) {
stopped.set(false);
paused.set(false);
doStart();
}
fireServiceNotification(ServiceNotification.SERVICE_STARTED);
if (startPaused) {
pause();
}
// We start the receivers _after_ starting the service because if a message
// gets routed to the service before it is started,
// org.mule.model.AbstractComponent.dispatchEvent() will throw a
// ServiceException with message COMPONENT_X_IS_STOPPED (see MULE-526).
startListeners();
}
public MuleMessage sendEvent(MuleEvent event) throws MuleException {
if (stopping.get() || stopped.get()) {
throw new ServiceException(CoreMessages.componentIsStopped(name), event.getMessage(), this);
}
try {
waitIfPaused(event);
} catch (InterruptedException e) {
throw new ServiceException(event.getMessage(), this, e);
}
if (stats.isEnabled()) {
stats.incReceivedEventSync();
}
if (logger.isDebugEnabled()) {
logger.debug(
"Service: "
+ name
+ " has received synchronous event on: "
+ event.getEndpoint().getEndpointURI());
}
event = OptimizedRequestContext.unsafeSetEvent(event);
return doSend(event);
}
public boolean isStarted() {
return !stopped.get();
}
public boolean isStopped() {
return stopped.get();
}
public boolean validate() {
// by default a dispatcher/requester can be used unless disposed
return !disposed.get();
}
