opendaylight/md-sal/sal-distributed-datastore/src/test/java/org/opendaylight/controller/cluster/datastore/utils/MockDataChangeListener.java

   1 /*
   2  * Copyright (c) 2014 Brocade Communications Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.cluster.datastore.utils;
   9
  10 import static org.junit.Assert.assertEquals;
  11 import static org.junit.Assert.assertTrue;
  12 import java.util.List;
  13 import java.util.concurrent.CountDownLatch;
  14 import java.util.concurrent.TimeUnit;
  15 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
  16 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
  17 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  18 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  19 import com.google.common.collect.Lists;
  20 import com.google.common.util.concurrent.Uninterruptibles;
  21
  22 /**
  23  * A mock DataChangeListener implementation.
  24  *
  25  * @author Thomas Pantelis
  26  */
  27 public class MockDataChangeListener implements
  28                          AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> {
  29
  30     private final List<AsyncDataChangeEvent<YangInstanceIdentifier, NormalizedNode<?, ?>>>
  31                                                                changeList = Lists.newArrayList();
  32     private final CountDownLatch changeLatch;
  33     private final int expChangeEventCount;
  34
  35     public MockDataChangeListener(int expChangeEventCount) {
  36         changeLatch = new CountDownLatch(expChangeEventCount);
  37         this.expChangeEventCount = expChangeEventCount;
  38     }
  39
  40     @Override
  41     public void onDataChanged(AsyncDataChangeEvent<YangInstanceIdentifier, NormalizedNode<?, ?>> change) {
  42         changeList.add(change);
  43         changeLatch.countDown();
  44     }
  45
  46     public void waitForChangeEvents(YangInstanceIdentifier... expPaths) {
  47         assertEquals("Change notifications complete", true,
  48                 Uninterruptibles.awaitUninterruptibly(changeLatch, 5, TimeUnit.SECONDS));
  49
  50         for(int i = 0; i < expPaths.length; i++) {
  51             assertTrue(String.format("Change %d does not contain %s", (i+1), expPaths[i]),
  52                     changeList.get(i).getCreatedData().containsKey(expPaths[i]));
  53         }
  54     }
  55
  56     public void expectNoMoreChanges(String assertMsg) {
  57         Uninterruptibles.sleepUninterruptibly(1, TimeUnit.SECONDS);
  58         assertEquals(assertMsg, expChangeEventCount, changeList.size());
  59     }
  60 }