/*
* Copyright 2014 Jeanfrancois Arcand
*
* 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.cometd;
import org.atmosphere.cpr.Action;
import org.atmosphere.cpr.AtmosphereConfig;
import org.atmosphere.cpr.AtmosphereInterceptor;
import org.atmosphere.cpr.AtmosphereRequest;
import org.atmosphere.cpr.AtmosphereResource;
import org.atmosphere.cpr.AtmosphereResourceEvent;
import org.atmosphere.cpr.AtmosphereResourceEventListenerAdapter;
import org.atmosphere.cpr.FrameworkConfig;
import org.eclipse.jetty.continuation.Continuation;
import org.eclipse.jetty.continuation.ContinuationListener;
import org.eclipse.jetty.continuation.ContinuationThrowable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.ServletException;
import javax.servlet.ServletResponse;
import java.io.IOException;
public class CometdAtmosphereInterceptor implements AtmosphereInterceptor {
private static final Logger logger = LoggerFactory.getLogger(JettyAsyncSupport.class);
@Override
public void configure(AtmosphereConfig config) {
if (config.getServletContext().getServerInfo().contains("jetty")) {
config.framework().setAsyncSupport(new JettyAsyncSupport(
config));
}
}
@Override
public Action inspect(final AtmosphereResource r) {
AtmosphereRequest request = r.getRequest();
if (r.transport().equals(AtmosphereResource.TRANSPORT.WEBSOCKET)) {
if (r.getRequest().getAttribute(FrameworkConfig.INJECTED_ATMOSPHERE_RESOURCE) != null) {
return Action.CANCELLED;
}
}
request.setAttribute(Continuation.ATTRIBUTE, new AtmosphereContinuation(r));
return Action.CONTINUE;
}
public final static class AtmosphereContinuation implements Continuation {
private long timeoutMs = -1;
private ServletResponse response;
private final AtmosphereResource r;
public AtmosphereContinuation(AtmosphereResource r) {
this.r = r;
}
@Override
public void setTimeout(long timeoutMs) {
this.timeoutMs = timeoutMs;
}
@Override
public void suspend() {
r.suspend(timeoutMs);
}
@Override
public void suspend(ServletResponse response) {
this.response = response;
r.suspend(timeoutMs);
}
@Override
public void resume() {
try {
r.getAtmosphereConfig().framework().doCometSupport(r.getRequest(), r.getResponse());
} catch (IOException e) {
logger.warn("",e);
} catch (ServletException e) {
logger.warn("", e);
}
r.resume();
}
@Override
public void complete() {
r.resume();
}
@Override
public boolean isSuspended() {
return r.isSuspended();
}
@Override
public boolean isResumed() {
return r.isResumed();
}
@Override
public boolean isExpired() {
return r.isResumed();
}
@Override
public boolean isInitial() {
return r.isSuspended();
}
@Override
public boolean isResponseWrapped() {
return true;
}
@Override
public ServletResponse getServletResponse() {
return response;
}
@Override
public void addContinuationListener(final ContinuationListener listener) {
r.addEventListener(new AtmosphereResourceEventListenerAdapter() {
@Override
public void onSuspend(AtmosphereResourceEvent event) {
}
@Override
public void onResume(AtmosphereResourceEvent event) {
if (event.isResuming()) {
listener.onComplete(AtmosphereContinuation.this);
} else {
try {
r.getAtmosphereConfig().framework().doCometSupport(r.getRequest(), r.getResponse());
} catch (IOException e) {
logger.warn("", e);
} catch (ServletException e) {
logger.warn("", e);
}
listener.onTimeout(AtmosphereContinuation.this);
}
}
});
}
@Override
public void setAttribute(String name, Object attribute) {
r.getRequest().setAttribute(name, attribute);
}
@Override
public Object getAttribute(String name) {
return r.getRequest().getAttribute(name);
}
@Override
public void removeAttribute(String name) {
r.getRequest().removeAttribute(name);
}
@Override
public void undispatch() throws ContinuationThrowable {
}
}
@Override
public void postInspect(AtmosphereResource r) {
}
@Override
public String toString() {
return "CometD/Bayeux Protocol";
}
}