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wes Atmosphere 2
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/*
 * Copyright 2013-2014 Donghwan Kim
 *
 * 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 io.github.flowersinthesand.wes.atmosphere;

import io.github.flowersinthesand.wes.Action;
import io.github.flowersinthesand.wes.Actions;
import io.github.flowersinthesand.wes.ServerHttpExchange;
import io.github.flowersinthesand.wes.ServerWebSocket;
import io.github.flowersinthesand.wes.SimpleActions;

import java.io.IOException;
import java.util.UUID;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;

import org.atmosphere.cpr.AtmosphereFramework;
import org.atmosphere.cpr.AtmosphereResource;
import org.atmosphere.cpr.AtmosphereResource.TRANSPORT;
import org.atmosphere.cpr.AtmosphereServlet;
import org.atmosphere.handler.AtmosphereHandlerAdapter;

/**
 * Convenient class to install Atmosphere bridge.
 * 
 * @author Donghwan Kim
 */
public class AtmosphereBridge {

	private Actions httpActions = new SimpleActions<>();
	private Actions wsActions = new SimpleActions<>();

	public AtmosphereBridge(ServletContext context, String path) {
		AtmosphereServlet servlet = null;
		try {
			servlet = context.createServlet(AtmosphereServlet.class);
		} catch (ServletException e) {
			throw new RuntimeException(e);
		}
		AtmosphereFramework framework = servlet.framework();
		framework.addAtmosphereHandler("/", new AtmosphereHandlerAdapter() {
			@Override
			public void onRequest(AtmosphereResource resource) throws IOException {
				if (resource.transport() == TRANSPORT.WEBSOCKET) {
					if (resource.getRequest().getMethod().equals("GET")) {
						wsActions.fire(new AtmosphereServerWebSocket(resource));
					}
				} else {
					httpActions.fire(new AtmosphereServerHttpExchange(resource));
				}
			}
		});

		ServletRegistration.Dynamic reg = context.addServlet("wes#" + UUID.randomUUID(), servlet);
		reg.setAsyncSupported(true);
		reg.addMapping(path);
	}

	/**
	 * Adds an action to be called on HTTP request with
	 * {@link ServerHttpExchange}.
	 */
	public AtmosphereBridge httpAction(Action action) {
		httpActions.add(action);
		return this;
	}

	/**
	 * Adds an action to be called on WebSocket connection with
	 * {@link ServerWebSocket} in open state.
	 */
	public AtmosphereBridge websocketAction(Action action) {
		wsActions.add(action);
		return this;
	}

}