opendaylight/md-sal/samples/clustering-test-app/provider/src/main/java/org/opendaylight/controller/clustering/it/provider/impl/IdIntsListener.java

   1 /*
   2  * Copyright (c) 2017 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.clustering.it.provider.impl;
   9
  10 import static com.google.common.base.Preconditions.checkState;
  11 import static org.opendaylight.controller.clustering.it.provider.impl.AbstractTransactionHandler.ITEM;
  12
  13 import com.google.common.util.concurrent.SettableFuture;
  14 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
  15 import java.util.HashMap;
  16 import java.util.List;
  17 import java.util.Map;
  18 import java.util.concurrent.Executors;
  19 import java.util.concurrent.Future;
  20 import java.util.concurrent.ScheduledExecutorService;
  21 import java.util.concurrent.ScheduledFuture;
  22 import java.util.concurrent.TimeUnit;
  23 import java.util.concurrent.atomic.AtomicLong;
  24 import org.opendaylight.mdsal.dom.api.ClusteredDOMDataTreeChangeListener;
  25 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  26 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
  27 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  28 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
  29 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  30 import org.opendaylight.yangtools.yang.data.tree.api.DataTreeCandidate;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33
  34 public final class IdIntsListener implements ClusteredDOMDataTreeChangeListener {
  35     private static final Logger LOG = LoggerFactory.getLogger(IdIntsListener.class);
  36     private static final long SECOND_AS_NANO = 1000000000;
  37
  38     private volatile NormalizedNode localCopy;
  39     private final AtomicLong lastNotifTimestamp = new AtomicLong(0);
  40     private ScheduledExecutorService executorService;
  41     private ScheduledFuture<?> scheduledFuture;
  42
  43     @Override
  44     public void onInitialData() {
  45         // Intentional no-op
  46     }
  47
  48     @Override
  49     public void onDataTreeChanged(final List<DataTreeCandidate> changes) {
  50
  51         // There should only be one candidate reported
  52         checkState(changes.size() == 1);
  53
  54         lastNotifTimestamp.set(System.nanoTime());
  55
  56         // do not log the change into debug, only use trace since it will lead to OOM on default heap settings
  57         LOG.debug("Received data tree changed");
  58
  59         changes.forEach(change -> {
  60             final var root = change.getRootNode();
  61             final var after = root.dataAfter();
  62             if (after != null) {
  63                 final var before = root.dataBefore();
  64                 LOG.trace("Received change, data before: {}, data after: {}", before != null ? before : "", after);
  65                 localCopy = after;
  66             } else {
  67                 LOG.warn("getDataAfter() is missing from notification. change: {}", change);
  68             }
  69         });
  70     }
  71
  72     public boolean hasTriggered() {
  73         return localCopy != null;
  74     }
  75
  76     public boolean checkEqual(final NormalizedNode expected) {
  77         return localCopy.equals(expected);
  78     }
  79
  80     @SuppressFBWarnings("BC_UNCONFIRMED_CAST")
  81     public String diffWithLocalCopy(final NormalizedNode expected) {
  82         return diffNodes((MapNode)expected, (MapNode)localCopy);
  83     }
  84
  85     public Future<Void> tryFinishProcessing() {
  86         executorService = Executors.newSingleThreadScheduledExecutor();
  87         final SettableFuture<Void> settableFuture = SettableFuture.create();
  88
  89         scheduledFuture = executorService.scheduleAtFixedRate(new CheckFinishedTask(settableFuture),
  90                 0, 1, TimeUnit.SECONDS);
  91         return settableFuture;
  92     }
  93
  94     public static String diffNodes(final MapNode expected, final MapNode actual) {
  95         StringBuilder builder = new StringBuilder("MapNodes diff:");
  96
  97         final YangInstanceIdentifier.NodeIdentifier itemNodeId = new YangInstanceIdentifier.NodeIdentifier(ITEM);
  98
  99         Map<NodeIdentifierWithPredicates, MapEntryNode> expIdIntMap = new HashMap<>();
 100         expected.body().forEach(node -> expIdIntMap.put(node.getIdentifier(), node));
 101
 102         actual.body().forEach(actIdInt -> {
 103             final MapEntryNode expIdInt = expIdIntMap.remove(actIdInt.getIdentifier());
 104             if (expIdInt == null) {
 105                 builder.append('\n').append("  Unexpected id-int entry for ").append(actIdInt.getIdentifier());
 106                 return;
 107             }
 108
 109             Map<NodeIdentifierWithPredicates, MapEntryNode> expItemMap = new HashMap<>();
 110             ((MapNode)expIdInt.findChildByArg(itemNodeId).orElseThrow()).body()
 111                 .forEach(node -> expItemMap.put(node.getIdentifier(), node));
 112
 113             ((MapNode)actIdInt.findChildByArg(itemNodeId).orElseThrow()).body().forEach(actItem -> {
 114                 final MapEntryNode expItem = expItemMap.remove(actItem.getIdentifier());
 115                 if (expItem == null) {
 116                     builder.append('\n').append("  Unexpected item entry ").append(actItem.getIdentifier())
 117                         .append(" for id-int entry ").append(actIdInt.getIdentifier());
 118                 }
 119             });
 120
 121             expItemMap.values().forEach(node -> builder.append('\n')
 122                 .append("  Actual is missing item entry ").append(node.getIdentifier())
 123                     .append(" for id-int entry ").append(actIdInt.getIdentifier()));
 124         });
 125
 126         expIdIntMap.values().forEach(node -> builder.append('\n')
 127             .append("  Actual is missing id-int entry for ").append(node.getIdentifier()));
 128
 129         return builder.toString();
 130     }
 131
 132     private class CheckFinishedTask implements Runnable {
 133
 134         private final SettableFuture<Void> future;
 135
 136         CheckFinishedTask(final SettableFuture<Void> future) {
 137             this.future = future;
 138         }
 139
 140         @Override
 141         public void run() {
 142             if (System.nanoTime() - lastNotifTimestamp.get() > SECOND_AS_NANO * 4) {
 143                 scheduledFuture.cancel(false);
 144                 future.set(null);
 145
 146                 executorService.shutdown();
 147             }
 148         }
 149     }
 150 }