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 static org.junit.Assert.fail;
  13 import com.google.common.collect.Lists;
  14 import com.google.common.util.concurrent.Uninterruptibles;
  15 import java.util.Collections;
  16 import java.util.List;
  17 import java.util.concurrent.CountDownLatch;
  18 import java.util.concurrent.TimeUnit;
  19 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
  20 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
  21 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  22 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  23
  24 /**
  25  * A mock DataChangeListener implementation.
  26  *
  27  * @author Thomas Pantelis
  28  */
  29 public class MockDataChangeListener implements
  30                          AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> {
  31
  32     private final List<AsyncDataChangeEvent<YangInstanceIdentifier, NormalizedNode<?, ?>>> changeList =
  33             Collections.synchronizedList(Lists.<AsyncDataChangeEvent<YangInstanceIdentifier,
  34                                                 NormalizedNode<?, ?>>>newArrayList());
  35
  36     private volatile CountDownLatch changeLatch;
  37     private int expChangeEventCount;
  38
  39     public MockDataChangeListener(int expChangeEventCount) {
  40         reset(expChangeEventCount);
  41     }
  42
  43     public void reset(int expChangeEventCount) {
  44         changeLatch = new CountDownLatch(expChangeEventCount);
  45         this.expChangeEventCount = expChangeEventCount;
  46         changeList.clear();
  47     }
  48
  49     @Override
  50     public void onDataChanged(AsyncDataChangeEvent<YangInstanceIdentifier, NormalizedNode<?, ?>> change) {
  51         changeList.add(change);
  52         changeLatch.countDown();
  53     }
  54
  55     public void waitForChangeEvents(YangInstanceIdentifier... expPaths) {
  56         boolean done = Uninterruptibles.awaitUninterruptibly(changeLatch, 5, TimeUnit.SECONDS);
  57         if(!done) {
  58             fail(String.format("Missing change notifications. Expected: %d. Actual: %d",
  59                     expChangeEventCount, (expChangeEventCount - changeLatch.getCount())));
  60         }
  61
  62         for(int i = 0; i < expPaths.length; i++) {
  63             assertTrue(String.format("Change %d does not contain %s", (i+1), expPaths[i]),
  64                     changeList.get(i).getCreatedData().containsKey(expPaths[i]));
  65         }
  66     }
  67
  68     public void expectNoMoreChanges(String assertMsg) {
  69         Uninterruptibles.sleepUninterruptibly(1, TimeUnit.SECONDS);
  70         assertEquals(assertMsg, expChangeEventCount, changeList.size());
  71     }
  72 }