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.Map;
  18 import java.util.concurrent.CountDownLatch;
  19 import java.util.concurrent.TimeUnit;
  20 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
  21 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
  22 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  23 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  24
  25 /**
  26  * A mock DataChangeListener implementation.
  27  *
  28  * @author Thomas Pantelis
  29  */
  30 public class MockDataChangeListener implements
  31                          AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> {
  32
  33     private final List<AsyncDataChangeEvent<YangInstanceIdentifier, NormalizedNode<?, ?>>> changeList =
  34             Collections.synchronizedList(Lists.<AsyncDataChangeEvent<YangInstanceIdentifier,
  35                                                 NormalizedNode<?, ?>>>newArrayList());
  36
  37     private volatile CountDownLatch changeLatch;
  38     private int expChangeEventCount;
  39
  40     public MockDataChangeListener(int expChangeEventCount) {
  41         reset(expChangeEventCount);
  42     }
  43
  44     public void reset(int expChangeEventCount) {
  45         changeLatch = new CountDownLatch(expChangeEventCount);
  46         this.expChangeEventCount = expChangeEventCount;
  47         changeList.clear();
  48     }
  49
  50     @Override
  51     public void onDataChanged(AsyncDataChangeEvent<YangInstanceIdentifier, NormalizedNode<?, ?>> change) {
  52         changeList.add(change);
  53         changeLatch.countDown();
  54     }
  55
  56     public void waitForChangeEvents(YangInstanceIdentifier... expPaths) {
  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         for(int i = 0; i < expPaths.length; i++) {
  64             Map<YangInstanceIdentifier, NormalizedNode<?, ?>> createdData = changeList.get(i).getCreatedData();
  65             assertTrue(String.format("Change %d does not contain %s. Actual: %s", (i+1), expPaths[i], createdData),
  66                     createdData.containsKey(expPaths[i]));
  67         }
  68     }
  69
  70     public NormalizedNode<?, ?> getCreatedData(int i, YangInstanceIdentifier path) {
  71         return changeList.get(i).getCreatedData().get(path);
  72     }
  73
  74     public void verifyCreatedData(int i, YangInstanceIdentifier path) {
  75         Map<YangInstanceIdentifier, NormalizedNode<?, ?>> createdData = changeList.get(i).getCreatedData();
  76         assertTrue(path + " not present in " + createdData.keySet(), createdData.get(path) != null);
  77     }
  78
  79     public void expectNoMoreChanges(String assertMsg) {
  80         Uninterruptibles.sleepUninterruptibly(500, TimeUnit.MILLISECONDS);
  81         assertEquals(assertMsg, expChangeEventCount, changeList.size());
  82     }
  83
  84     public void verifyNoCreatedData(int i, YangInstanceIdentifier path) {
  85         Map<YangInstanceIdentifier, NormalizedNode<?, ?>> createdData = changeList.get(i).getCreatedData();
  86         assertTrue("Unexpected " + path + " present in createdData", createdData.get(path) == null);
  87     }
  88 }