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/*
* SocketAnalyzer.java February 2012
*
* Copyright (C) 2007, 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.transport.connect;
import java.nio.channels.SelectableChannel;
import org.simpleframework.transport.trace.TraceAnalyzer;
import org.simpleframework.transport.trace.Trace;
/**
* The <code>SocketAnalyzer</code> is used to wrap an analyzer object.
* Wrapping an analyzer in this way ensures that even if the analyzer
* is badly written there is little chance that it will affect the
* operation of the server. All <code>Trace</code> objects returned
* from this will catch all exceptions within the created trace.
*
* @author Niall Gallagher
*/
class SocketAnalyzer implements TraceAnalyzer {
/**
* This is the analyzer that is used to create the trace objects.
*/
private final TraceAnalyzer analyzer;
/**
* Constructor for the <code>SocketAnalyzer</code> object. This will
* be given the analyzer that is to be used to create traces. This
* can be a null value, in which case the trace provided will be
* a simple empty void that swallows all trace events.
*
* @param analyzer the analyzer that is to be wrapped by this
*/
public SocketAnalyzer(TraceAnalyzer analyzer) {
this.analyzer = analyzer;
}
/**
* This method is used to attach a trace to the specified channel.
* Attaching a trace basically means associating events from that
* trace with the specified socket. It ensures that the events
* from a specific channel can be observed in isolation.
*
* @param channel this is the channel to associate with the trace
*
* @return this returns a trace associated with the channel
*/
public Trace attach(SelectableChannel channel) {
Trace trace = null;
if(analyzer != null) {
trace = analyzer.attach(channel);
}
return new SocketTrace(trace);
}
/**
* This is used to stop the analyzer and clear all trace information.
* Stopping the analyzer is typically done when the server is stopped
* and is used to free any resources associated with the analyzer. If
* an analyzer does not hold information this method can be ignored.
*/
public void stop() {
if(analyzer != null) {
analyzer.stop();
}
}
}
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