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/*
* SessionBuilder.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.Scheduler;
import org.simpleframework.http.Request;
import org.simpleframework.http.Response;
import org.simpleframework.http.socket.Session;
import org.simpleframework.transport.reactor.Reactor;
/**
* The <code>SessionBuilder</code> object is used to create sessions
* for connected WebSockets. Before the session is created a response
* is sent back to the connected client. If for some reason the session
* is not valid or does not conform to the requirements of RFC 6455
* then a HTTP 400 response code is sent and the TCP channel is closed.
*
* @author Niall Gallagher
*/
class SessionBuilder {
/**
* This is the scheduler that is used to ping WebSocket sessions.
*/
private final Scheduler scheduler;
/**
* This is the reactor used to register for I/O notifications.
*/
private final Reactor reactor;
/**
* This is the frequency the server should send out ping frames.
*/
private final long ping;
/**
* Constructor for the <code>SessionBuilder</code> object. This is
* used to create sessions using the request and response associated
* with the WebSocket opening handshake.
*
* @param scheduler this is the shared thread pool used for pinging
* @param reactor this is used to check for I/O notifications
* @param ping this is the frequency to send out ping frames
*/
public SessionBuilder(Scheduler scheduler, Reactor reactor, long ping) {
this.scheduler = scheduler;
this.reactor = reactor;
this.ping = ping;
}
/**
* This is used to create a WebSocket session. If at any point there
* is an error creating the session the underlying TCP connection is
* closed and a <code>Session</code> is returned regardless.
*
* @param request this is the request associated with this session
* @param response this is the response associated with this session
*
* @return this returns the session associated with the WebSocket
*/
public Session create(Request request, Response response) throws Exception {
FrameConnection connection = new FrameConnection(request, response, reactor);
ResponseBuilder builder = new ResponseBuilder(request, response);
StatusChecker checker = new StatusChecker(connection, request, scheduler, ping);
try {
builder.commit();
checker.start();
} catch(Exception e) {
throw new IOException("Could not send response", e);
}
return connection.open();
}
}
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