WebLogicCometSupport.java

/*
 * 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.
 */
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 * Copyright 2007-2008 Sun Microsystems, Inc. All rights reserved.
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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
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package org.atmosphere.weblogic;

import org.atmosphere.cpr.Action;
import org.atmosphere.cpr.ApplicationConfig;
import org.atmosphere.cpr.AsynchronousProcessor;
import org.atmosphere.cpr.AtmosphereConfig;
import org.atmosphere.cpr.AtmosphereRequest;
import org.atmosphere.cpr.AtmosphereResourceImpl;
import org.atmosphere.cpr.AtmosphereResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import weblogic.servlet.http.AbstractAsyncServlet;
import weblogic.servlet.http.RequestResponseKey;

import javax.servlet.ServletException;
import java.io.IOException;

/**
 * Weblogic support.
 *
 * @author Jeanfrancois Arcand
 */
public class WebLogicCometSupport extends AsynchronousProcessor {

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

    public static final String RRK = "RequestResponseKey";

    public WebLogicCometSupport(AtmosphereConfig config) {
        super(config);
    }

    /**
     * {@inheritDoc}
     */
    public Action service(AtmosphereRequest req, AtmosphereResponse res)
            throws IOException, ServletException {
        Action action = suspended(req, res);
        if (action.type() == Action.TYPE.SUSPEND) {
            logger.debug("Suspending response: {}", res);
        } else if (action.type() == Action.TYPE.RESUME) {
            logger.debug("Resuming response: {}", res);

            Action nextAction = resumed(req, res);
            if (nextAction.type() == Action.TYPE.SUSPEND) {
                logger.debug("Suspending after resuming response: {}", res);
            }
        }
        return action;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void action(AtmosphereResourceImpl actionEvent) {
        super.action(actionEvent);
        if (actionEvent.isInScope() && actionEvent.action().type() == Action.TYPE.RESUME) {
            try {
                RequestResponseKey rrk = (RequestResponseKey) actionEvent.getRequest().getSession().getAttribute(RRK);
                AbstractAsyncServlet.notify(rrk, null);
            } catch (IOException ex) {
                logger.debug("action failed", ex);
            }
        }
    }

}