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

   1 /*
   2  * Copyright (c) 2015 Cisco 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.assertFalse;
  12 import static org.junit.Assert.fail;
  13
  14 import com.google.common.collect.Lists;
  15 import com.google.common.util.concurrent.Uninterruptibles;
  16 import java.util.Arrays;
  17 import java.util.Collection;
  18 import java.util.HashSet;
  19 import java.util.List;
  20 import java.util.Set;
  21 import java.util.concurrent.CountDownLatch;
  22 import java.util.concurrent.TimeUnit;
  23 import javax.annotation.Nonnull;
  24 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeListener;
  25 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  26 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  27
  28 public class MockDataTreeChangeListener implements DOMDataTreeChangeListener {
  29
  30     private final List<DataTreeCandidate> changeList = Lists.newArrayList();
  31
  32     private volatile CountDownLatch changeLatch;
  33     private int expChangeEventCount;
  34
  35     public MockDataTreeChangeListener(int expChangeEventCount) {
  36         reset(expChangeEventCount);
  37     }
  38
  39     public void reset(int newExpChangeEventCount) {
  40         changeLatch = new CountDownLatch(newExpChangeEventCount);
  41         this.expChangeEventCount = newExpChangeEventCount;
  42         synchronized (changeList) {
  43             changeList.clear();
  44         }
  45     }
  46
  47     @Override
  48     public void onDataTreeChanged(@Nonnull final Collection<DataTreeCandidate> changes) {
  49         if (changeLatch.getCount() > 0) {
  50             synchronized (changeList) {
  51                 changeList.addAll(changes);
  52             }
  53             changeLatch.countDown();
  54         }
  55     }
  56
  57     public void waitForChangeEvents() {
  58         boolean done = Uninterruptibles.awaitUninterruptibly(changeLatch, 5, TimeUnit.SECONDS);
  59         if (!done) {
  60             fail(String.format("Missing change notifications. Expected: %d. Actual: %d",
  61                     expChangeEventCount, expChangeEventCount - changeLatch.getCount()));
  62         }
  63     }
  64
  65     public void verifyNotifiedData(YangInstanceIdentifier... paths) {
  66         Set<YangInstanceIdentifier> pathSet = new HashSet<>(Arrays.asList(paths));
  67         synchronized (changeList) {
  68             for (DataTreeCandidate c : changeList) {
  69                 pathSet.remove(c.getRootPath());
  70             }
  71         }
  72
  73         if (!pathSet.isEmpty()) {
  74             fail(pathSet + " not present in " + changeList);
  75         }
  76     }
  77
  78     public void expectNoMoreChanges(String assertMsg) {
  79         Uninterruptibles.sleepUninterruptibly(500, TimeUnit.MILLISECONDS);
  80         synchronized (changeList) {
  81             assertEquals(assertMsg, expChangeEventCount, changeList.size());
  82         }
  83     }
  84
  85     public void verifyNoNotifiedData(YangInstanceIdentifier... paths) {
  86         Set<YangInstanceIdentifier> pathSet = new HashSet<>(Arrays.asList(paths));
  87         synchronized (changeList) {
  88             for (DataTreeCandidate c : changeList) {
  89                 assertFalse("Unexpected " + c.getRootPath() + " present in DataTreeCandidate",
  90                         pathSet.contains(c.getRootPath()));
  91             }
  92         }
  93     }
  94 }