freddo.dtalk2.broker.servlet.DTalkServerEndpoint.java Source code

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Here is the source code for freddo.dtalk2.broker.servlet.DTalkServerEndpoint.java

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/*
 * Copyright (c) 2013-2015 ArkaSoft LLC.
 * 
 * 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 freddo.dtalk2.broker.servlet;

import static freddo.dtalk2.broker.servlet.ServerEndpointConfigurator.DTALK_HANDSHAKE_REQUEST_KEY;

import java.io.IOException;
import java.util.Enumeration;
import java.util.concurrent.Future;

import javax.servlet.http.HttpSession;
import javax.websocket.EndpointConfig;
import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.HandshakeRequest;
import javax.websocket.server.ServerEndpoint;

import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import freddo.dtalk2.DTalk;
import freddo.dtalk2.DTalkConnection;
import freddo.dtalk2.broker.BrokerMessageHandler;

@ServerEndpoint(value = DTalk.DTALKSRV_PATH, configurator = ServerEndpointConfigurator.class)
public class DTalkServerEndpoint implements DTalkConnection {
    private static final Logger LOG = LoggerFactory.getLogger(DTalkServerEndpoint.class);

    private EndpointConfig mConfig;
    private Session mSession;

    private String mName = null;

    @Override
    public String getName() {
        return mName != null ? mName : mSession.getId();
    }

    public void setName(String name) {
        mName = name;
    }

    @OnOpen
    public void onOpen(Session session, EndpointConfig config) {
        LOG.trace(">>> onOpen: {}, userProperties: {}", session.getId(), config.getUserProperties());

        mConfig = config;
        mSession = session;

        if (LOG.isDebugEnabled()) {
            HandshakeRequest req = getHandshakeRequest();
            HttpSession httpSession = (HttpSession) req.getHttpSession();
            LOG.debug("=================================");
            LOG.debug("QueryString   : {}", req.getQueryString());
            LOG.debug("RequestURI    : {}", req.getRequestURI());
            LOG.debug("Headers       : {}", req.getHeaders());
            LOG.debug("UserPrincipal : {}", req.getUserPrincipal());
            LOG.debug("ParameterMap  : {}", req.getParameterMap());
            LOG.debug("=================================");
            if (httpSession != null) {
                Enumeration<String> e = httpSession.getAttributeNames();
                while (e.hasMoreElements()) {
                    final String attr = e.nextElement();
                    LOG.debug("Session[{}]: {}", attr, httpSession.getAttribute(attr));
                }
                LOG.debug("=================================");
            }
        }

        // TODO register connection & notify context listener

    }

    HandshakeRequest getHandshakeRequest() {
        return (HandshakeRequest) mConfig.getUserProperties().get(DTALK_HANDSHAKE_REQUEST_KEY);
    }

    @SuppressWarnings("deprecation")
    @OnClose
    public void onClose() {
        LOG.trace(">>> onClose: {}", mSession.getId());
        DTalk.sendMessage("DTalkConnectionClosed#" + getName(), this);
    }

    @OnMessage
    public void onMessage(String message) {
        message = StringUtils.deleteWhitespace(message);

        if (LOG.isTraceEnabled()) {
            String _message = message;
            if (_message.length() > 64) {
                _message = _message.substring(0, 64) + "...";
            }
            LOG.trace(">>> onMessage: {}", _message);
        }

        // Handle message.
        BrokerMessageHandler.onMessage(this, message);
    }

    @OnError
    public void onError(Throwable exception, Session session) {
        LOG.error(">>> onError: (session: {})", session.getId(), exception);
        close();
    }

    @Override
    public Future<Void> sendMessage(String message) {
        message = StringUtils.deleteWhitespace(message);

        if (LOG.isTraceEnabled()) {
            String _message = message;
            if (_message.length() > 64) {
                _message = _message.substring(0, 64) + "...";
            }
            LOG.trace(">>> onMessage: {}", _message);
        }

        return mSession.getAsyncRemote().sendText(message);
    }

    @Override
    public void close() {
        LOG.trace(">>> close");

        try {
            mSession.close();
        } catch (IOException e) {
            // TODO remove connection form connection registry & notify context
            // listener
        }
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((mSession == null) ? 0 : mSession.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        DTalkServerEndpoint other = (DTalkServerEndpoint) obj;
        if (mSession == null) {
            if (other.mSession != null)
                return false;
        } else if (!mSession.equals(other.mSession))
            return false;
        return true;
    }

    @Override
    public String toString() {
        return "DTalkServerEndpoint [mSession=" + mSession.getId() + "]";
    }

}