com.cosylab.epics.caj.cas.requests.BeaconRequest 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.requests;

import java.net.InetAddress;

import com.cosylab.epics.caj.cas.CAJServerContext;
import com.cosylab.epics.caj.impl.Request;
import com.cosylab.epics.caj.impl.Transport;
import com.cosylab.epics.caj.impl.requests.AbstractCARequest;
import com.cosylab.epics.caj.util.InetAddressUtil;

/**
 * CA beacon (SRV_IS_UP) request.
 * @author Matej Sekoranja
 * @version $id$
 */
public class BeaconRequest extends AbstractCARequest {

	/**
	 * @param transport to be used when sending.
	 */
	public BeaconRequest(Transport transport, int beaconSequenceID) {
		super(transport);
		
		// set server IP address
		int serverIP = 0;
		InetAddress serverAddress = ((CAJServerContext)(transport.getContext())).getServerInetAddress();
		if (serverAddress != null && !serverAddress.isAnyLocalAddress())
			serverIP = InetAddressUtil.ipv4AddressToInt(serverAddress);

		requestMessage = insertCAHeader(transport, null,
										(short)13, (short)0, (short)transport.getContext().getServerPort(), (short)0,
										beaconSequenceID, serverIP);
	}

	/**
	 * @see com.cosylab.epics.caj.impl.Request#getPriority()
	 */
	public byte getPriority() {
		return Request.SEND_IMMEDIATELY_PRIORITY;
	}

}