| /* |
| * Copyright (c) 2007, 2008, 2011, 2012, 2015 Eike Stepper (Berlin, Germany) and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.net4j.internal.jms.protocol; |
| |
| import org.eclipse.net4j.jms.JMSProtocolConstants; |
| import org.eclipse.net4j.signal.RequestWithConfirmation; |
| import org.eclipse.net4j.util.io.ExtendedDataInputStream; |
| import org.eclipse.net4j.util.io.ExtendedDataOutputStream; |
| |
| /** |
| * @author Eike Stepper |
| */ |
| public class JMSSyncRequest extends RequestWithConfirmation<Long> |
| { |
| private long clientTime0; |
| |
| /** |
| * @since 2.0 |
| */ |
| public JMSSyncRequest(JMSClientProtocol protocol) |
| { |
| super(protocol, JMSProtocolConstants.SIGNAL_SYNC); |
| } |
| |
| @Override |
| protected void requesting(ExtendedDataOutputStream out) throws Exception |
| { |
| clientTime0 = System.currentTimeMillis(); |
| } |
| |
| @Override |
| protected Long confirming(ExtendedDataInputStream in) throws Exception |
| { |
| long serverTime = in.readLong(); |
| long clientTime1 = System.currentTimeMillis(); |
| long roundTripDuration = clientTime1 - clientTime0; |
| return serverTime + roundTripDuration / 2; |
| } |
| } |