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/*
* ServiceDispatcher.java February 2014
*
* Copyright (C) 2014, Niall Gallagher <niallg@users.sf.net>
*
* 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.simpleframework.http.socket.service;
import java.io.IOException;
import org.simpleframework.common.thread.ConcurrentScheduler;
import org.simpleframework.common.thread.Scheduler;
import org.simpleframework.http.Request;
import org.simpleframework.http.Response;
import org.simpleframework.transport.reactor.ExecutorReactor;
import org.simpleframework.transport.reactor.Reactor;
/**
* The <code>ServiceDispatcher</code> object is used to perform the
* opening handshake for a WebSocket session. Once the session has been
* established it is connected to a <code>Service</code> where frames
* can be sent and received. If for any reason the handshake fails
* this will terminated the connection with a HTTP 400 response.
*
* @author Niall Gallagher
*/
class ServiceDispatcher {
/**
* This is the session dispatcher used to dispatch the session.
*/
private final SessionDispatcher dispatcher;
/**
* This is used to build the sessions from the handshake request.
*/
private final SessionBuilder builder;
/**
* This is used asynchronously read frames from the TCP channel.
*/
private final Scheduler scheduler;
/**
* This is used to notify of read events on the TCP channel.
*/
private final Reactor reactor;
/**
* Constructor for the <code>ServiceDispatcher</code> object. The
* dispatcher created will dispatch WebSocket sessions to a service
* using the provided <code>Router</code> instance.
*
* @param router this is the router used to select a service
* @param threads this is the number of threads to use
*/
public ServiceDispatcher(Router router, int threads) throws IOException {
this(router, threads, 10000);
}
/**
* Constructor for the <code>ServiceDispatcher</code> object. The
* dispatcher created will dispatch WebSocket sessions to a service
* using the provided <code>Router</code> instance.
*
* @param router this is the router used to select a service
* @param threads this is the number of threads to use
* @param ping this is the frequency used to send ping frames
*/
public ServiceDispatcher(Router router, int threads, long ping) throws IOException {
this.scheduler = new ConcurrentScheduler(FrameCollector.class, threads);
this.reactor = new ExecutorReactor(scheduler);
this.builder = new SessionBuilder(scheduler, reactor, ping);
this.dispatcher = new SessionDispatcher(builder, router);
}
/**
* This method is used to create a dispatch a <code>Session</code> to
* a specific service selected by a router. If the session initiating
* handshake fails for any reason this will close the underlying TCP
* connection and send a HTTP 400 response back to the client.
*
* @param request this is the session initiating request
* @param response this is the session initiating response
*/
public void dispatch(Request request, Response response) {
dispatcher.dispatch(request, response);
}
}
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