/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.mina.example.sumup;
import org.apache.mina.common.IdleStatus;
import org.apache.mina.common.IoHandler;
import org.apache.mina.common.IoHandlerAdapter;
import org.apache.mina.common.IoSession;
import org.apache.mina.example.sumup.message.AddMessage;
import org.apache.mina.example.sumup.message.ResultMessage;
import org.apache.mina.util.SessionLog;
/**
* {@link IoHandler} for SumUp server.
*
* @author The Apache Directory Project (mina-dev@directory.apache.org)
* @version $Rev: 448090 $, $Date: 2006-09-20 15:30:28 +0900 (수, 20 9월 2006) $
*/
public class ServerSessionHandler extends IoHandlerAdapter
{
public void sessionOpened( IoSession session )
{
// set idle time to 60 seconds
session.setIdleTime( IdleStatus.BOTH_IDLE, 60 );
// initial sum is zero
session.setAttachment( new Integer( 0 ) );
}
public void messageReceived( IoSession session, Object message )
{
// client only sends AddMessage. otherwise, we will have to identify
// its type using instanceof operator.
AddMessage am = ( AddMessage ) message;
// add the value to the current sum.
int sum = ( ( Integer ) session.getAttachment() ).intValue();
int value = am.getValue();
long expectedSum = ( long ) sum + value;
if( expectedSum > Integer.MAX_VALUE || expectedSum < Integer.MIN_VALUE )
{
// if the sum overflows or underflows, return error message
ResultMessage rm = new ResultMessage();
rm.setSequence( am.getSequence() ); // copy sequence
rm.setOk( false );
session.write( rm );
}
else
{
// sum up
sum = ( int ) expectedSum;
session.setAttachment( new Integer( sum ) );
// return the result message
ResultMessage rm = new ResultMessage();
rm.setSequence( am.getSequence() ); // copy sequence
rm.setOk( true );
rm.setValue( sum );
session.write( rm );
}
}
public void sessionIdle( IoSession session, IdleStatus status )
{
SessionLog.info( session, "Disconnecting the idle." );
// disconnect an idle client
session.close();
}
public void exceptionCaught( IoSession session, Throwable cause )
{
// close the connection on exceptional situation
session.close();
}
}