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 import com.google.common.collect.Lists;
  14 import com.google.common.util.concurrent.Uninterruptibles;
  15 import java.util.Arrays;
  16 import java.util.Collection;
  17 import java.util.Collections;
  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             Collections.synchronizedList(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 expChangeEventCount) {
  41         changeLatch = new CountDownLatch(expChangeEventCount);
  42         this.expChangeEventCount = expChangeEventCount;
  43         changeList.clear();
  44     }
  45
  46     @Override
  47     public void onDataTreeChanged(@Nonnull final Collection<DataTreeCandidate> changes) {
  48         changeList.add(changes);
  49         changeLatch.countDown();
  50     }
  51
  52     public void waitForChangeEvents() {
  53         boolean done = Uninterruptibles.awaitUninterruptibly(changeLatch, 5, TimeUnit.SECONDS);
  54         if(!done) {
  55             fail(String.format("Missing change notifications. Expected: %d. Actual: %d",
  56                     expChangeEventCount, (expChangeEventCount - changeLatch.getCount())));
  57         }
  58     }
  59
  60     public void verifyNotifiedData(YangInstanceIdentifier... paths) {
  61         Set<YangInstanceIdentifier> pathSet = new HashSet<>(Arrays.asList(paths));
  62         for(Collection<DataTreeCandidate> list: changeList) {
  63             for(DataTreeCandidate c: list) {
  64                 pathSet.remove(c.getRootPath());
  65             }
  66         }
  67
  68         if(!pathSet.isEmpty()) {
  69             fail(pathSet + " not present in " + changeList);
  70         }
  71     }
  72
  73     public void expectNoMoreChanges(String assertMsg) {
  74         Uninterruptibles.sleepUninterruptibly(500, TimeUnit.MILLISECONDS);
  75         assertEquals(assertMsg, expChangeEventCount, changeList.size());
  76     }
  77
  78     public void verifyNoNotifiedData(YangInstanceIdentifier... paths) {
  79         Set<YangInstanceIdentifier> pathSet = new HashSet<>(Arrays.asList(paths));
  80         for(Collection<DataTreeCandidate> list: changeList) {
  81             for(DataTreeCandidate c: list) {
  82                 assertFalse("Unexpected " + c.getRootPath() + " present in DataTreeCandidate",
  83                         pathSet.contains(c.getRootPath()));
  84             }
  85         }
  86     }
  87 }