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Support for Comet and Websocket endpoints
/*
* Fabric3
* Copyright (c) 2009-2011 Metaform Systems
*
* Fabric3 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version, with the
* following exception:
*
* Linking this software statically or dynamically with other
* modules is making a combined work based on this software.
* Thus, the terms and conditions of the GNU General Public
* License cover the whole combination.
*
* As a special exception, the copyright holders of this software
* give you permission to link this software with independent
* modules to produce an executable, regardless of the license
* terms of these independent modules, and to copy and distribute
* the resulting executable under terms of your choice, provided
* that you also meet, for each linked independent module, the
* terms and conditions of the license of that module. An
* independent module is a module which is not derived from or
* based on this software. If you modify this software, you may
* extend this exception to your version of the software, but
* you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version.
*
* Fabric3 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the
* GNU General Public License along with Fabric3.
* If not, see {
private static final String CONTEXT_PATH = "/web/*";
private ServiceManager serviceManager;
private BroadcasterManager broadcasterManager;
private ServletHost servletHost;
private long timeout = 1000 * 10 * 60;
private ServiceGatewayServlet gatewayServlet;
private ServiceMonitor monitor;
public WebSourceWireAttacher(@Reference ServiceManager serviceManager,
@Reference BroadcasterManager broadcasterManager,
@Reference ServletHost servletHost,
@Monitor ServiceMonitor monitor) {
this.broadcasterManager = broadcasterManager;
this.serviceManager = serviceManager;
this.servletHost = servletHost;
this.monitor = monitor;
}
/**
* Sets the client connection timeout
*
* @param timeout the timeout in milliseconds
*/
@Property(required = false)
public void setTimeout(long timeout) {
this.timeout = timeout;
}
@Init
public void init() throws ServletException {
GatewayServletContext context = new GatewayServletContext(CONTEXT_PATH);
// TODO support other configuration as specified in AtmosphereServlet init()
context.setInitParameter(AtmosphereServlet.PROPERTY_SESSION_SUPPORT, "false");
context.setInitParameter(AtmosphereServlet.WEBSOCKET_ATMOSPHEREHANDLER, "false"); // turn the handler off as it is overriden below
context.setInitParameter(AtmosphereServlet.WEBSOCKET_SUPPORT, "true");
GatewayServletConfig config = new GatewayServletConfig(context);
gatewayServlet = new ServiceGatewayServlet(serviceManager, broadcasterManager, servletHost, monitor);
gatewayServlet.init(config);
ServiceRouter router = new ServiceRouter(timeout);
ReflectorServletProcessor processor = new ReflectorServletProcessor();
processor.setServlet(router);
processor.init(config);
ServiceWebSocketHandler webSocketHandler = new ServiceWebSocketHandler(processor);
gatewayServlet.addAtmosphereHandler("/*", webSocketHandler);
servletHost.registerMapping(CONTEXT_PATH, gatewayServlet);
}
@Destroy
public void destroy() {
servletHost.unregisterMapping(CONTEXT_PATH);
gatewayServlet.destroy();
}
public void attach(WebSourceDefinition source, PhysicalTargetDefinition target, Wire wire) throws WiringException {
String path = getPath(source);
if (wire.getInvocationChains().size() != 1) {
// the websocket binding only supports service contracts with one operation
throw new IllegalArgumentException("Invalid wire size");
}
InvocationChain chain = wire.getInvocationChains().get(0);
// use the service URI as the callback id
String callbackUri = source.getUri().toString();
serviceManager.register(path, chain, callbackUri);
String prefix = CONTEXT_PATH.substring(0, CONTEXT_PATH.length() - 1);
monitor.provisionedEndpoint(prefix + path);
}
public void detach(WebSourceDefinition source, PhysicalTargetDefinition target) throws WiringException {
String path = getPath(source);
serviceManager.unregister(path);
String prefix = CONTEXT_PATH.substring(0, CONTEXT_PATH.length() - 1);
monitor.removedEndpoint(prefix + path);
}
public void attachObjectFactory(WebSourceDefinition source, ObjectFactory objectFactory, PhysicalTargetDefinition target) {
throw new UnsupportedOperationException();
}
public void detachObjectFactory(WebSourceDefinition source, PhysicalTargetDefinition target) {
throw new UnsupportedOperationException();
}
/**
* Returns the service path by stripping the leading '/'.
*
* @param source the source metadata
* @return the path
*/
private String getPath(WebSourceDefinition source) {
return source.getUri().getPath().substring(1);
}
}
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