interactivespaces.service.web.server.BasicMultipleConnectionWebServerWebSocketHandlerFactory.java Source code

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Here is the source code for interactivespaces.service.web.server.BasicMultipleConnectionWebServerWebSocketHandlerFactory.java

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/*
 * Copyright (C) 2012 Google Inc.
 *
 * 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 interactivespaces.service.web.server;

import interactivespaces.service.web.WebSocketConnection;

import com.google.common.collect.Maps;

import org.apache.commons.logging.Log;

import java.util.Map;
import java.util.concurrent.atomic.AtomicLong;

/**
 * A basic implementation of the
 * {@link MultipleConnectionWebServerWebSocketHandlerFactory}.
 *
 * @author Keith M. Hughes
 */
public class BasicMultipleConnectionWebServerWebSocketHandlerFactory
        implements MultipleConnectionWebServerWebSocketHandlerFactory {

    /**
     * The client handler.
     */
    private final MultipleConnectionWebSocketHandler clientHandler;

    /**
     * A map from connect IDs to handlers.
     */
    private final Map<String, MyWebServerWebSocketHandler> handlers = Maps.newConcurrentMap();

    /**
     * Creator of connection IDs.
     */
    private final AtomicLong connectionIdFactory = new AtomicLong(System.currentTimeMillis());

    /**
     * Log.
     */
    private final Log log;

    /**
     * Construct a basic factory.
     *
     * @param clientHandler
     *          the client handler to use
     * @param log
     *          the logger to use
     */
    public BasicMultipleConnectionWebServerWebSocketHandlerFactory(MultipleConnectionWebSocketHandler clientHandler,
            Log log) {
        this.clientHandler = clientHandler;
        this.log = log;
    }

    @Override
    public WebServerWebSocketHandler newWebSocketHandler(WebSocketConnection connection) {
        return new MyWebServerWebSocketHandler(connection);
    }

    @Override
    public boolean areWebSocketsConnected() {
        return !handlers.isEmpty();
    }

    @Override
    public void sendJson(String connectionId, Object data) {
        MyWebServerWebSocketHandler handler = handlers.get(connectionId);
        if (handler != null) {
            handler.sendJson(data);
        } else {
            log.error(String.format("Unknown web socket connection ID %s", connectionId));
        }
    }

    @Override
    public void sendJson(Object data) {
        for (MyWebServerWebSocketHandler handler : handlers.values()) {
            handler.sendJson(data);
        }
    }

    @Override
    public void sendString(String connectionId, String data) {
        MyWebServerWebSocketHandler handler = handlers.get(connectionId);
        if (handler != null) {
            handler.sendString(data);
        } else {
            log.error(String.format("Unknown web socket connection ID %s", connectionId));
        }
    }

    @Override
    public void sendString(String data) {
        for (MyWebServerWebSocketHandler handler : handlers.values()) {
            handler.sendString(data);
        }
    }

    /**
     * Create a new connection ID.
     *
     * @return the new connection ID
     */
    private String newConnectionId() {
        return Long.toHexString(connectionIdFactory.getAndAdd(1));
    }

    /**
     * Web socket handler for this class.
     *
     * @author Keith M. Hughes
     */
    public class MyWebServerWebSocketHandler extends WebServerWebSocketHandlerSupport {

        /**
         * The ID for the connection.
         */
        private final String connectionId;

        /**
         * Construct a new web socket handler.
         *
         * @param connection
         *          the web socket connection
         */
        public MyWebServerWebSocketHandler(WebSocketConnection connection) {
            super(connection);

            this.connectionId = newConnectionId();
            handlers.put(connectionId, this);
        }

        @Override
        public void onReceive(Object data) {
            clientHandler.handleWebSocketReceive(connectionId, data);
        }

        @Override
        public void onConnect() {
            clientHandler.handleNewWebSocketConnection(connectionId);
        }

        @Override
        public void onClose() {
            handlers.remove(connectionId);

            clientHandler.handleWebSocketClose(connectionId);
        }
    }
}