-/*
- * Copyright (c) 2013 Cisco Systems, Inc. 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
- */
-
-package org.opendaylight.controller.protocol_plugin.openflow.core.internal;
-
-import java.util.concurrent.Callable;
-import java.util.concurrent.CountDownLatch;
-
-import org.opendaylight.controller.protocol_plugin.openflow.core.ISwitch;
-import org.openflow.protocol.OFBarrierRequest;
-import org.openflow.protocol.OFError;
-import org.openflow.protocol.OFMessage;
-
-/**
- * This class implements synchronous operations on message send to a switch. If
- * syncRequest is set to true, it sends the requested message to the switch
- * followed by a Barrier request message. It returns the result once it gets the
- * reply from the switch or after a timeout. If the protocol does not dictate
- * the switch to reply the processing status for a particular message, the
- * Barrier request forces the switch to reply saying whether or not the message
- * processing was successful for messages sent to the switch up to this point.
- * If syncRequest is false, it simply skips the message send and just waits for
- * the response back.
- */
-public class SynchronousMessage implements Callable<Object> {
- private ISwitch sw;
- private Integer xid;
- private OFMessage syncMsg;
- protected CountDownLatch latch;
- private Object result;
- private boolean syncRequest;
-
- public SynchronousMessage(ISwitch sw, Integer xid, OFMessage msg,
- boolean syncRequest) {
- this.sw = sw;
- this.xid = xid;
- syncMsg = msg;
- latch = new CountDownLatch(1);
- result = null;
- this.syncRequest = syncRequest;
- }
-
- @Override
- public Object call() throws Exception {
- /*
- * Send out message only if syncRequest is set to true. Otherwise, just
- * wait for the Barrier response back.
- */
- if (syncRequest) {
- sw.asyncSend(syncMsg, xid);
- if (!(syncMsg instanceof OFBarrierRequest)) {
- OFBarrierRequest barrierMsg = new OFBarrierRequest();
- sw.asyncSend(barrierMsg, xid);
- }
- }
- latch.await();
- return result;
- }
-
- public Integer getXid() {
- return this.xid;
- }
-
- public void wakeup() {
- this.latch.countDown();
- }
-
- public void wakeup(OFError e) {
- result = e;
- wakeup();
- }
-
-}
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