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
  14 import com.google.common.collect.Lists;
  15 import com.google.common.util.concurrent.Uninterruptibles;
  16 import java.util.Collections;
  17 import java.util.List;
  18 import java.util.Map;
  19 import java.util.concurrent.CountDownLatch;
  20 import java.util.concurrent.TimeUnit;
  21 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
  22 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
  23 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  24 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  25
  26 /**
  27  * A mock DataChangeListener implementation.
  28  *
  29  * @author Thomas Pantelis
  30  */
  31 public class MockDataChangeListener implements
  32                          AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> {
  33
  34     private final List<AsyncDataChangeEvent<YangInstanceIdentifier, NormalizedNode<?, ?>>> changeList =
  35             Collections.synchronizedList(Lists.<AsyncDataChangeEvent<YangInstanceIdentifier,
  36                                                 NormalizedNode<?, ?>>>newArrayList());
  37
  38     private volatile CountDownLatch changeLatch;
  39     private int expChangeEventCount;
  40
  41     public MockDataChangeListener(int expChangeEventCount) {
  42         reset(expChangeEventCount);
  43     }
  44
  45     public void reset(int newExpChangeEventCount) {
  46         changeLatch = new CountDownLatch(newExpChangeEventCount);
  47         this.expChangeEventCount = newExpChangeEventCount;
  48         changeList.clear();
  49     }
  50
  51     @Override
  52     public void onDataChanged(AsyncDataChangeEvent<YangInstanceIdentifier, NormalizedNode<?, ?>> change) {
  53         changeList.add(change);
  54         changeLatch.countDown();
  55     }
  56
  57     public void waitForChangeEvents(YangInstanceIdentifier... expPaths) {
  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         for (int i = 0; i < expPaths.length; i++) {
  65             Map<YangInstanceIdentifier, NormalizedNode<?, ?>> createdData = changeList.get(i).getCreatedData();
  66             assertTrue(String.format("Change %d does not contain %s. Actual: %s", i + 1, expPaths[i], createdData),
  67                     createdData.containsKey(expPaths[i]));
  68         }
  69     }
  70
  71     public NormalizedNode<?, ?> getCreatedData(int num, YangInstanceIdentifier path) {
  72         return changeList.get(num).getCreatedData().get(path);
  73     }
  74
  75     public void verifyCreatedData(int num, YangInstanceIdentifier path) {
  76         Map<YangInstanceIdentifier, NormalizedNode<?, ?>> createdData = changeList.get(num).getCreatedData();
  77         assertTrue(path + " not present in " + createdData.keySet(), createdData.get(path) != null);
  78     }
  79
  80     public void expectNoMoreChanges(String assertMsg) {
  81         Uninterruptibles.sleepUninterruptibly(500, TimeUnit.MILLISECONDS);
  82         assertEquals(assertMsg, expChangeEventCount, changeList.size());
  83     }
  84
  85     public void verifyNoCreatedData(int num, YangInstanceIdentifier path) {
  86         Map<YangInstanceIdentifier, NormalizedNode<?, ?>> createdData = changeList.get(num).getCreatedData();
  87         assertTrue("Unexpected " + path + " present in createdData", createdData.get(path) == null);
  88     }
  89 }