Package org.atmosphere.jersey

Source Code of org.atmosphere.jersey.AtmosphereProviders$BroadcasterProvider

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*
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* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* 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.jersey;

import com.sun.jersey.spi.StringReader;
import com.sun.jersey.spi.StringReaderProvider;
import org.atmosphere.cpr.AtmosphereResource;
import org.atmosphere.cpr.AtmosphereServlet;
import org.atmosphere.cpr.Broadcaster;
import org.atmosphere.cpr.BroadcasterFactory;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.Context;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;

/**
* Placeholder for injection of Atmosphere object based on
* any parameter value (header, cookie, query, matrix or path)
*
* @author Paul.Sandoz@Sun.Com
* @author Jean-Francois Arcand
*/
public class AtmosphereProviders {

    public static class BroadcasterProvider implements StringReaderProvider {

        @Context HttpServletRequest req;

        @Override
        public StringReader getStringReader(Class type, Type genericType, Annotation[] annotations) {

            if (!Broadcaster.class.isAssignableFrom(type)) {
                return null;
            }

            return new BroadcasterStringReader();
        }

        @StringReader.ValidateDefaultValue(false)
        public class BroadcasterStringReader implements StringReader {
            @Override
            public Object fromString(String topic) {
                Broadcaster broadcaster = null;
                try {
                    AtmosphereResource<HttpServletRequest, HttpServletResponse> r =
                            (AtmosphereResource<HttpServletRequest, HttpServletResponse>)
                                    req.getAttribute(AtmosphereServlet.ATMOSPHERE_RESOURCE);
                    BroadcasterFactory bp = (BroadcasterFactory)
                            req.getAttribute(AtmosphereServlet.BROADCASTER_FACTORY);

                    broadcaster = bp.lookup(r.getBroadcaster().getClass(), topic, true);
                } catch (Throwable ex) {
                    throw new WebApplicationException(ex);
                }
                req.setAttribute(AtmosphereFilter.INJECTED_BROADCASTER, broadcaster);
                return broadcaster;
            }
        }

    }
}
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