Add messaging.channel package

spring-websocket/src/main/java/org/springframework/web/messaging/support/ReactorMessageChannel.java

@@ -1,141 +0,0 @@
-/*
- * Copyright 2002-2013 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.web.messaging.support;
-
-import java.util.HashMap;
-import java.util.Map;
-
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-import org.springframework.messaging.Message;
-import org.springframework.messaging.MessageHandler;
-import org.springframework.messaging.SubscribableChannel;
-
-import reactor.core.Reactor;
-import reactor.fn.Consumer;
-import reactor.fn.Event;
-import reactor.fn.registry.Registration;
-import reactor.fn.selector.ObjectSelector;
-
-
-/**
- * @author Rossen Stoyanchev
- * @since 4.0
- */
-public class ReactorMessageChannel implements SubscribableChannel {
-
-	private static Log logger = LogFactory.getLog(ReactorMessageChannel.class);
-
-	private final Reactor reactor;
-
-	private final Object key = new Object();
-
-	private String name = toString(); // TODO
-
-
-	private final Map<MessageHandler, Registration<?>> registrations =
-			new HashMap<MessageHandler, Registration<?>>();
-
-
-	public ReactorMessageChannel(Reactor reactor) {
-		this.reactor = reactor;
-	}
-
-	public void setName(String name) {
-		this.name = name;
-	}
-
-	public String getName() {
-		return this.name;
-	}
-
-	@Override
-	public boolean send(Message<?> message) {
-		return send(message, -1);
-	}
-
-	@Override
-	public boolean send(Message<?> message, long timeout) {
-		if (logger.isTraceEnabled()) {
-			logger.trace("Channel " + getName() + ", sending message id=" + message.getHeaders().getId());
-		}
-		this.reactor.notify(this.key, Event.wrap(message));
-		return true;
-	}
-
-	@Override
-	public boolean subscribe(final MessageHandler handler) {
-
-		if (this.registrations.containsKey(handler)) {
-			logger.warn("Channel " + getName() + ", handler already subscribed " + handler);
-			return false;
-		}
-
-		if (logger.isTraceEnabled()) {
-			logger.trace("Channel " + getName() + ", subscribing handler " + handler);
-		}
-
-		Registration<Consumer<Event<Message<?>>>> registration = this.reactor.on(
-				ObjectSelector.objectSelector(key), new MessageHandlerConsumer(handler));
-
-		this.registrations.put(handler, registration);
-
-		return true;
-	}
-
-	@Override
-	public boolean unsubscribe(MessageHandler handler) {
-
-		if (logger.isTraceEnabled()) {
-			logger.trace("Channel " + getName() + ", removing subscription for handler " + handler);
-		}
-
-		Registration<?> registration = this.registrations.remove(handler);
-		if (registration == null) {
-			if (logger.isTraceEnabled()) {
-				logger.trace("Channel " + getName() + ", no subscription for handler " + handler);
-			}
-			return false;
-		}
-
-		registration.cancel();
-		return true;
-	}
-
-
-	private static final class MessageHandlerConsumer implements Consumer<Event<Message<?>>> {
-
-		private final MessageHandler handler;
-
-		private MessageHandlerConsumer(MessageHandler handler) {
-			this.handler = handler;
-		}
-
-		@Override
-		public void accept(Event<Message<?>> event) {
-			Message<?> message = event.getData();
-			try {
-				this.handler.handleMessage(message);
-			}
-			catch (Throwable t) {
-				// TODO
-				logger.error("Failed to process message " + message, t);
-			}
-		}
-	}
-
-}