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<Collection<DataTreeCandidate>> changeList =
  31             Lists.<Collection<DataTreeCandidate>>newArrayList();
  32
  33     private volatile CountDownLatch changeLatch;
  34     private int expChangeEventCount;
  35
  36     public MockDataTreeChangeListener(int expChangeEventCount) {
  37         reset(expChangeEventCount);
  38     }
  39
  40     public void reset(int newExpChangeEventCount) {
  41         changeLatch = new CountDownLatch(newExpChangeEventCount);
  42         this.expChangeEventCount = newExpChangeEventCount;
  43         synchronized (changeList) {
  44             changeList.clear();
  45         }
  46     }
  47
  48     @Override
  49     public void onDataTreeChanged(@Nonnull final Collection<DataTreeCandidate> changes) {
  50         synchronized (changeList) {
  51             changeList.add(changes);
  52         }
  53         changeLatch.countDown();
  54     }
  55
  56     public void waitForChangeEvents() {
  57         boolean done = Uninterruptibles.awaitUninterruptibly(changeLatch, 5, TimeUnit.SECONDS);
  58         if (!done) {
  59             fail(String.format("Missing change notifications. Expected: %d. Actual: %d",
  60                     expChangeEventCount, expChangeEventCount - changeLatch.getCount()));
  61         }
  62     }
  63
  64     public void verifyNotifiedData(YangInstanceIdentifier... paths) {
  65         Set<YangInstanceIdentifier> pathSet = new HashSet<>(Arrays.asList(paths));
  66         synchronized (changeList) {
  67             for (Collection<DataTreeCandidate> list : changeList) {
  68                 for (DataTreeCandidate c : list) {
  69                     pathSet.remove(c.getRootPath());
  70                 }
  71             }
  72         }
  73
  74         if (!pathSet.isEmpty()) {
  75             fail(pathSet + " not present in " + changeList);
  76         }
  77     }
  78
  79     public void expectNoMoreChanges(String assertMsg) {
  80         Uninterruptibles.sleepUninterruptibly(500, TimeUnit.MILLISECONDS);
  81         synchronized (changeList) {
  82             assertEquals(assertMsg, expChangeEventCount, changeList.size());
  83         }
  84     }
  85
  86     public void verifyNoNotifiedData(YangInstanceIdentifier... paths) {
  87         Set<YangInstanceIdentifier> pathSet = new HashSet<>(Arrays.asList(paths));
  88         synchronized (changeList) {
  89             for (Collection<DataTreeCandidate> list : changeList) {
  90                 for (DataTreeCandidate c : list) {
  91                     assertFalse("Unexpected " + c.getRootPath() + " present in DataTreeCandidate",
  92                             pathSet.contains(c.getRootPath()));
  93                 }
  94             }
  95         }
  96     }
  97 }