com.cosylab.epics.caj.cas.handlers.EventCancelResponse Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jca Show documentation

JCA is an EPICS Channel Access library for Java. For more information concerning EPICS or Channel Access please refer to the <a href="http://www.aps.anl.gov/epics">EPICS Web pages</a> or read the <a href="http://www.aps.anl.gov/epics/base/R3-14/8-docs/CAref.html">Channel Access manual (3.14)</a>. <p>This module also includes CAJ, A 100% pure Java implementation of the EPICS Channel Access library.</p>

There is a newer version: 2.4.10

Show newest version

/*
 * Copyright (c) 2004 by Cosylab
 *
 * The full license specifying the redistribution, modification, usage and other
 * rights and obligations is included with the distribution of this project in
 * the file "LICENSE-CAJ". If the license is not included visit Cosylab web site,
 * .
 *
 * THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND, NOT EVEN THE
 * IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR OF THIS SOFTWARE, ASSUMES
 * _NO_ RESPONSIBILITY FOR ANY CONSEQUENCE RESULTING FROM THE USE, MODIFICATION,
 * OR REDISTRIBUTION OF THIS SOFTWARE.
 */

package com.cosylab.epics.caj.cas.handlers;

import gov.aps.jca.CAStatus;
import gov.aps.jca.cas.ServerChannel;
import gov.aps.jca.cas.ServerMonitor;

import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.util.logging.Level;

import com.cosylab.epics.caj.cas.CAJServerContext;
import com.cosylab.epics.caj.cas.CASTransport;
import com.cosylab.epics.caj.cas.requests.EventCancelRequest;
import com.cosylab.epics.caj.impl.Transport;

/**
 * CA event cancel request handler.
 * @author Matej Sekoranja
 * @version $id$
 */
public class EventCancelResponse extends AbstractCASResponseHandler {

	/**
	 * @param context
	 */
	public EventCancelResponse(CAJServerContext context) {
		super(context, "Event cancel request");
	}

	/**
	 * @see com.cosylab.epics.caj.impl.handlers.AbstractCAJResponseHandler#internalHandleResponse(java.net.InetSocketAddress, com.cosylab.epics.caj.impl.Transport, java.nio.ByteBuffer[])
	 */
	protected void internalHandleResponse(
		InetSocketAddress responseFrom,
		Transport transport,
		ByteBuffer[] response) {

		CASTransport casTransport = (CASTransport)transport;
		
		// get channel by SID
		ServerChannel channel = casTransport.getChannel(parameter1);
		if (channel == null) 
		{
			sendException(transport, parameter1, CAStatus.BADCHID, response[0], null);
			disconnect(transport);
			return;
		} 

		// get monitor by IOID
		ServerMonitor monitor = channel.getMonitor(parameter2);
		if (monitor == null) 
		{
			sendException(transport, parameter1, CAStatus.BADMONID, response[0], null);
			disconnect(transport);
			return;
		} 
		
		// destroy
		monitor.destroy();
		
		// send response back
		try
		{
			new EventCancelRequest(transport, parameter1, parameter2, dataType, dataCount).submit();

		} catch (Throwable th) {
			context.getLogger().log(Level.WARNING, "Exception caught when responding to event cancel request for channel with SID : " + parameter1, th);
		}
		
	}

	/**
	 * Disconnect.
	 */
	private void disconnect(Transport transport)
	{
		((CASTransport)transport).close(true);
	}
	
}