public void receive(AsyncMessage message) throws MessageReceivingException {
if (message == null) throw new NullPointerException("message cannot be null");
GravityInternal gravity = getGravity();
if (udpReceiver != null) {
if (udpReceiver.isClosed()) return;
try {
udpReceiver.receive(message);
} catch (MessageReceivingException e) {
if (e.getCause() instanceof SocketException) {
log.debug(e, "Closing unreachable UDP channel %s", getId());
udpReceiver.close(false);
} else log.error(e, "Cannot access UDP channel %s", getId());
}
return;
}
receivedQueueLock.lock();
try {
if (receivedQueue.size() + 1 > gravity.getGravityConfig().getMaxMessagesQueuedPerChannel())
throw new MessageReceivingException(
message, "Could not queue message (channel's queue is full) for channel: " + this);
log.debug(
"Channel %s queue message %s for client %s",
getId(), message.getMessageId(), message.getClientId());
receivedQueue.add(message);
} finally {
receivedQueueLock.unlock();
}
if (hasAsyncHttpContext()) receiver.queue(gravity);
}
public void readExternal(ObjectInput input) throws IOException, ClassNotFoundException {
super.readExternal(input);
short[] flagsArray = readFlags(input);
for (int i = 0; i < flagsArray.length; i++) {
short flags = flagsArray[i];
short reservedPosition = 0;
if (i == 0) {
if ((flags & 0x1) != 0) {
this.identity = ((Map) input.readObject());
}
if ((flags & 0x2) != 0) this.operation = ((Number) input.readObject()).intValue();
else {
this.operation = 0;
}
reservedPosition = 2;
}
if (flags >> reservedPosition != 0) {
for (short j = reservedPosition; j < 6; j = (short) (j + 1)) {
if ((flags >> j & 0x1) != 0) {
input.readObject();
}
}
}
}
}
private Message handlePingMessage(ChannelFactory<?> channelFactory, CommandMessage message) {
Channel channel = createChannel(channelFactory, (String) message.getClientId());
AsyncMessage reply = new AcknowledgeMessage(message);
reply.setClientId(channel.getId());
Map<String, Object> advice = new HashMap<String, Object>();
advice.put(RECONNECT_INTERVAL_MS_KEY, Long.valueOf(gravityConfig.getReconnectIntervalMillis()));
advice.put(RECONNECT_MAX_ATTEMPTS_KEY, Long.valueOf(gravityConfig.getReconnectMaxAttempts()));
advice.put(ENCODE_MESSAGE_BODY_KEY, Boolean.valueOf(gravityConfig.isEncodeMessageBody()));
reply.setBody(advice);
reply.setDestination(message.getDestination());
log.debug("handshake.handle: reply=%s", reply);
return reply;
}
private Message handleUnsubscribeMessage(
final ChannelFactory<?> channelFactory, CommandMessage message) {
Channel channel = getChannel(channelFactory, (String) message.getClientId());
if (channel == null) return handleUnknownClientMessage(message);
AsyncMessage reply = null;
ServiceAdapter adapter = adapterFactory.getServiceAdapter(message);
reply = (AcknowledgeMessage) adapter.manage(channel, message);
postManage(channel);
if (!(reply instanceof ErrorMessage)) {
// Remove subscription message in distributed data (clustering).
try {
DistributedData gdd = graniteConfig.getDistributedDataFactory().getInstance();
if (gdd != null) {
String subscriptionId =
(String) message.getHeader(AsyncMessage.DESTINATION_CLIENT_ID_HEADER);
log.debug(
"Removing subscription message from channel info: %s - %s",
channel.getId(), subscriptionId);
gdd.removeSubcription(channel.getId(), subscriptionId);
}
} catch (Exception e) {
log.error(
e,
"Could not remove subscription from distributed data: %s - %s",
channel.getId(),
message.getHeader(AsyncMessage.DESTINATION_CLIENT_ID_HEADER));
}
}
reply.setDestination(message.getDestination());
reply.setClientId(channel.getId());
reply.getHeaders().putAll(message.getHeaders());
return reply;
}
private Message handlePublishMessage(
final ChannelFactory<?> channelFactory, final AsyncMessage message, final Channel channel) {
GraniteContext context = GraniteContext.getCurrentInstance();
// Get and check destination.
Destination destination =
context
.getServicesConfig()
.findDestinationById(message.getClass().getName(), message.getDestination());
if (destination == null) return getInvalidDestinationError(message);
if (message.getMessageId() == null) message.setMessageId(UUIDUtil.randomUUID());
message.setTimestamp(System.currentTimeMillis());
if (channel != null) message.setClientId(channel.getId());
GravityInvocationContext invocationContext =
new GravityInvocationContext(message, destination) {
@Override
public Object invoke() throws Exception {
// Publish...
Channel fromChannel = channel;
if (fromChannel == null)
fromChannel = getChannel(channelFactory, (String) message.getClientId());
if (fromChannel == null) return handleUnknownClientMessage(message);
ServiceAdapter adapter = adapterFactory.getServiceAdapter(message);
AsyncMessage reply = (AsyncMessage) adapter.invoke(fromChannel, message);
reply.setDestination(message.getDestination());
reply.setClientId(fromChannel.getId());
return reply;
}
};
// Check security 1 (destination).
if (destination.getSecurizer() instanceof GravityDestinationSecurizer) {
try {
((GravityDestinationSecurizer) destination.getSecurizer()).canPublish(invocationContext);
} catch (Exception e) {
return new ErrorMessage(message, e, true);
}
}
// Check security 2 (security service).
GraniteConfig config = context.getGraniteConfig();
try {
if (config.hasSecurityService() && config.getSecurityService().acceptsContext())
return (Message) config.getSecurityService().authorize(invocationContext);
return (Message) invocationContext.invoke();
} catch (Exception e) {
return new ErrorMessage(message, e, true);
}
}
public void writeExternal(ObjectOutput output) throws IOException {
super.writeExternal(output);
int flags = 0;
if (this.identity != null) {
flags |= 1;
}
if (this.operation != 0) {
flags |= 2;
}
output.writeByte(flags);
if (this.identity != null) {
output.writeObject(this.identity);
}
if (this.operation != 0) output.writeObject(Integer.valueOf(this.operation));
}
public boolean runReceived(AsyncHttpContext asyncHttpContext) {
GravityInternal gravity = getGravity();
if (asyncHttpContext != null && gravity.hasUdpReceiverFactory()) {
UdpReceiverFactory factory = gravity.getUdpReceiverFactory();
if (factory.isUdpConnectRequest(asyncHttpContext.getConnectMessage())) {
createUdpReceiver(factory, asyncHttpContext);
return true;
}
if (udpReceiver != null) {
if (!udpReceiver.isClosed()) udpReceiver.close(false);
udpReceiver = null;
}
}
boolean httpAsParam = (asyncHttpContext != null);
LinkedList<AsyncMessage> messages = null;
OutputStream os = null;
try {
receivedQueueLock.lock();
try {
// Do we have any pending messages?
if (receivedQueue.isEmpty()) return false;
// Do we have a valid http context?
if (asyncHttpContext == null) {
asyncHttpContext = acquireAsyncHttpContext();
if (asyncHttpContext == null) return false;
}
// Both conditions are ok, get all pending messages.
messages = receivedQueue;
receivedQueue = new LinkedList<AsyncMessage>();
} finally {
receivedQueueLock.unlock();
}
HttpServletRequest request = asyncHttpContext.getRequest();
HttpServletResponse response = asyncHttpContext.getResponse();
// Set response messages correlation ids to connect request message id.
String correlationId = asyncHttpContext.getConnectMessage().getMessageId();
AsyncMessage[] messagesArray = new AsyncMessage[messages.size()];
int i = 0;
for (AsyncMessage message : messages) {
message.setCorrelationId(correlationId);
messagesArray[i++] = message;
}
// Setup serialization context (thread local)
GraniteContext context =
HttpGraniteContext.createThreadIntance(
gravity.getGraniteConfig(), gravity.getServicesConfig(), null, request, response);
((AMFContextImpl) context.getAMFContext())
.setCurrentAmf3Message(asyncHttpContext.getConnectMessage());
// Write messages to response output stream.
GravityServletUtil.serialize(
gravity, response, messagesArray, ContentType.forMimeType(request.getContentType()));
return true; // Messages were delivered, http context isn't valid anymore.
} catch (ServletException e) {
log.error(e, "Configuration error for channel: %s", getId());
return true;
} catch (IOException e) {
log.warn(e, "Could not send messages to channel: %s (retrying later)", getId());
GravityConfig gravityConfig = getGravity().getGravityConfig();
if (gravityConfig.isRetryOnError()) {
receivedQueueLock.lock();
try {
if (receivedQueue.size() + messages.size()
> gravityConfig.getMaxMessagesQueuedPerChannel()) {
log.warn(
"Channel %s has reached its maximum queue capacity %s (throwing %s messages)",
getId(), gravityConfig.getMaxMessagesQueuedPerChannel(), messages.size());
} else receivedQueue.addAll(0, messages);
} finally {
receivedQueueLock.unlock();
}
}
return true; // Messages weren't delivered, but http context isn't valid anymore.
} finally {
// Cleanup serialization context (thread local)
try {
GraniteContext.release();
} catch (Exception e) {
// should never happen...
}
// Close output stream.
try {
if (os != null) {
try {
os.close();
} catch (IOException e) {
log.warn(e, "Could not close output stream (ignored)");
}
}
} finally {
// Cleanup http context (only if this method wasn't explicitly called with a non null
// AsyncHttpContext from the servlet).
if (!httpAsParam) releaseAsyncHttpContext(asyncHttpContext);
}
}
}
public boolean runReceived(AsyncHttpContext asyncHttpContext) {
boolean httpAsParam = (asyncHttpContext != null);
LinkedList<AsyncMessage> messages = null;
OutputStream os = null;
try {
receivedQueueLock.lock();
try {
// Do we have any pending messages?
if (receivedQueue.isEmpty()) return false;
// Do we have a valid http context?
if (asyncHttpContext == null) {
asyncHttpContext = acquireAsyncHttpContext();
if (asyncHttpContext == null) return false;
}
// Both conditions are ok, get all pending messages.
messages = receivedQueue;
receivedQueue = new LinkedList<AsyncMessage>();
} finally {
receivedQueueLock.unlock();
}
HttpServletRequest request = asyncHttpContext.getRequest();
HttpServletResponse response = asyncHttpContext.getResponse();
// Set response messages correlation ids to connect request message id.
String correlationId = asyncHttpContext.getConnectMessage().getMessageId();
AsyncMessage[] messagesArray = new AsyncMessage[messages.size()];
int i = 0;
for (AsyncMessage message : messages) {
message.setCorrelationId(correlationId);
messagesArray[i++] = message;
}
// Setup serialization context (thread local)
Gravity gravity = getGravity();
GraniteContext context =
HttpGraniteContext.createThreadIntance(
gravity.getGraniteConfig(), gravity.getServicesConfig(), null, request, response);
((AMFContextImpl) context.getAMFContext())
.setCurrentAmf3Message(asyncHttpContext.getConnectMessage());
// Write messages to response output stream.
response.setStatus(HttpServletResponse.SC_OK);
response.setContentType(AMF0Message.CONTENT_TYPE);
response.setDateHeader("Expire", 0L);
response.setHeader("Cache-Control", "no-store");
os = response.getOutputStream();
ObjectOutput amf3Serializer = context.getGraniteConfig().newAMF3Serializer(os);
log.debug("<< [MESSAGES for channel=%s] %s", this, messagesArray);
amf3Serializer.writeObject(messagesArray);
os.flush();
response.flushBuffer();
return true; // Messages were delivered, http context isn't valid anymore.
} catch (IOException e) {
log.warn(e, "Could not send messages to channel: %s (retrying later)", this);
GravityConfig gravityConfig = getGravity().getGravityConfig();
if (messages != null && gravityConfig.isRetryOnError()) {
receivedQueueLock.lock();
try {
if (receivedQueue.size() + messages.size()
> gravityConfig.getMaxMessagesQueuedPerChannel()) {
log.warn(
"Channel %s has reached its maximum queue capacity %s (throwing %s messages)",
this, gravityConfig.getMaxMessagesQueuedPerChannel(), messages.size());
} else receivedQueue.addAll(0, messages);
} finally {
receivedQueueLock.unlock();
}
}
return true; // Messages weren't delivered, but http context isn't valid anymore.
} finally {
// Cleanup serialization context (thread local)
try {
GraniteContext.release();
} catch (Exception e) {
// should never happen...
}
// Close output stream.
try {
if (os != null) {
try {
os.close();
} catch (IOException e) {
log.warn(e, "Could not close output stream (ignored)");
}
}
} finally {
// Cleanup http context (only if this method wasn't explicitly called with a non null
// AsyncHttpContext from the servlet).
if (!httpAsParam) releaseAsyncHttpContext(asyncHttpContext);
}
}
}
