jp.co.ctc_g.rack.websocket.sharedmessage.SharedMessageHandler.java Source code

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Here is the source code for jp.co.ctc_g.rack.websocket.sharedmessage.SharedMessageHandler.java

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/*
 *  Copyright (c) 2013 ITOCHU Techno-Solutions Corporation.
 *
 *  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 jp.co.ctc_g.rack.websocket.sharedmessage;

import java.util.List;

import jp.co.ctc_g.jfw.core.internal.InternalException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpHeaders;
import org.springframework.stereotype.Component;
import org.springframework.web.socket.CloseStatus;
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.adapter.TextWebSocketHandlerAdapter;

/**
 * <p>
 * ????ID??????
 * </p>
 * @author ITOCHU Techno-Solutions Corporation.
 */
@Component(value = "/sharedmessage")
public class SharedMessageHandler extends TextWebSocketHandlerAdapter {

    private static final Logger L = LoggerFactory.getLogger(SharedMessageHandler.class);

    /**
     * {@inheritDoc}
     */
    @Override
    public void afterConnectionEstablished(WebSocketSession session) {

        L.info("WebSocket connection is open");
        Groups.addGroup(new Group(getGroupId(session), session));
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {

        L.info("handle message" + message.getPayload());
        Groups.broadcast(getGroupId(session), message.getPayload());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {

        L.info("WebSocket connection is closed");
        Groups.remove(session.getId());
        super.afterConnectionClosed(session, status);
    };

    /**
     * {@inheritDoc}
     */
    @Override
    public void handleTransportError(WebSocketSession session, Throwable exception) throws Exception {

        L.debug(exception.getMessage());
    }

    private String getGroupId(WebSocketSession session) {

        HttpHeaders headers = session.getHandshakeHeaders();
        if (headers == null) {
            throw new InternalException(SharedMessageHandler.class, "E-SHARED#0001");
        }
        List<String> groupIds = headers.get("x-GroupId");
        if (groupIds == null || groupIds.size() != 1) {
            throw new InternalException(SharedMessageHandler.class, "E-SHARED#0001");
        }
        return groupIds.get(0);
    }
}