org.atmosphere.container.TomcatWebSocketHandler Maven / Gradle / Ivy

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/*
 * Copyright 2017 Async-IO.org
 *
 * 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.atmosphere.container;

import org.apache.catalina.websocket.StreamInbound;
import org.apache.catalina.websocket.WsOutbound;
import org.atmosphere.container.version.TomcatWebSocket;
import org.atmosphere.cpr.ApplicationConfig;
import org.atmosphere.cpr.AtmosphereFramework;
import org.atmosphere.cpr.AtmosphereRequest;
import org.atmosphere.cpr.AtmosphereResponseImpl;
import org.atmosphere.websocket.WebSocket;
import org.atmosphere.websocket.WebSocketProcessor;
import com.vaadin.external.org.slf4j.Logger;
import com.vaadin.external.org.slf4j.LoggerFactory;

import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.nio.CharBuffer;
import java.util.concurrent.atomic.AtomicBoolean;

public class TomcatWebSocketHandler extends StreamInbound {

    private static final Logger logger = LoggerFactory.getLogger(TomcatWebSocketHandler.class);

    private final WebSocketProcessor webSocketProcessor;
    private final AtmosphereRequest request;
    private final AtmosphereFramework framework;
    private WebSocket webSocket;
    private final int webSocketWriteTimeout;
    // Tomcat may invoke onClose several time.
    private final AtomicBoolean isClosed = new AtomicBoolean();

    public TomcatWebSocketHandler(AtmosphereRequest request, AtmosphereFramework framework, WebSocketProcessor webSocketProcessor) {
        this.request = request;
        this.framework = framework;
        this.webSocketProcessor = webSocketProcessor;

        String s = framework.getAtmosphereConfig().getInitParameter(ApplicationConfig.WEBSOCKET_IDLETIME);
        if (s != null) {
            webSocketWriteTimeout = Integer.valueOf(s);
        } else {
            webSocketWriteTimeout = -1;
        }

        s = framework.getAtmosphereConfig().getInitParameter(ApplicationConfig.WEBSOCKET_BUFFER_SIZE);
        if (s != null) {
            setOutboundByteBufferSize(Integer.valueOf(s));
            setOutboundCharBufferSize(getOutboundByteBufferSize());
        }
    }

    @Override
    protected void onOpen(WsOutbound outbound) {
        logger.trace("WebSocket.onOpen.");
        webSocket = new TomcatWebSocket(outbound, framework.getAtmosphereConfig());
        try {
            webSocketProcessor.open(webSocket, request, AtmosphereResponseImpl.newInstance(framework.getAtmosphereConfig(), request, webSocket));
        } catch (Exception e) {
            logger.warn("failed to connect to web socket", e);
        }
    }

    @Override
    protected void onClose(int closeCode) {
        if (webSocketProcessor == null || isClosed.getAndSet(true)) return;

        logger.trace("onClose {}", closeCode);
        try {
            webSocketProcessor.close(webSocket, closeCode);
        } finally {
            request.destroy();
        }
    }

    protected void onTextMessage(CharBuffer message) throws IOException {
        logger.trace("WebSocket.onMessage");
        webSocketProcessor.invokeWebSocketProtocol(webSocket, message.toString());
    }

    @Override
    protected final void onBinaryData(InputStream is) throws IOException {
        logger.trace("WebSocket.onBynaryStream");
        webSocketProcessor.invokeWebSocketProtocol(webSocket, is);
    }

    @Override
    protected final void onTextData(Reader r) throws IOException {
        logger.trace("WebSocket.onTextStream");
        webSocketProcessor.invokeWebSocketProtocol(webSocket, r);
    }

    @Override
    public int getReadTimeout() {
        return webSocketWriteTimeout;
    }
}