opendaylight/md-sal/samples/clustering-test-app/provider/src/main/java/org/opendaylight/controller/clustering/it/provider/impl/PrefixShardHandler.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
   9 package org.opendaylight.controller.clustering.it.provider.impl;
  10
  11 import static org.opendaylight.controller.clustering.it.provider.impl.ProduceTransactionsHandler.ID;
  12 import static org.opendaylight.controller.clustering.it.provider.impl.ProduceTransactionsHandler.ID_INT;
  13 import static org.opendaylight.controller.clustering.it.provider.impl.ProduceTransactionsHandler.ID_INTS;
  14 import static org.opendaylight.controller.clustering.it.provider.impl.ProduceTransactionsHandler.ITEM;
  15
  16 import com.google.common.util.concurrent.CheckedFuture;
  17 import com.google.common.util.concurrent.FutureCallback;
  18 import com.google.common.util.concurrent.Futures;
  19 import com.google.common.util.concurrent.ListenableFuture;
  20 import com.google.common.util.concurrent.SettableFuture;
  21 import java.util.Collections;
  22 import java.util.HashMap;
  23 import java.util.Map;
  24 import java.util.concurrent.CompletionStage;
  25 import java.util.stream.Collectors;
  26 import javax.annotation.Nullable;
  27 import org.opendaylight.controller.cluster.access.concepts.MemberName;
  28 import org.opendaylight.controller.cluster.sharding.DistributedShardFactory;
  29 import org.opendaylight.controller.cluster.sharding.DistributedShardFactory.DistributedShardRegistration;
  30 import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeSerializer;
  31 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  32 import org.opendaylight.mdsal.common.api.TransactionCommitFailedException;
  33 import org.opendaylight.mdsal.dom.api.DOMDataTreeCursorAwareTransaction;
  34 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  35 import org.opendaylight.mdsal.dom.api.DOMDataTreeProducer;
  36 import org.opendaylight.mdsal.dom.api.DOMDataTreeProducerException;
  37 import org.opendaylight.mdsal.dom.api.DOMDataTreeService;
  38 import org.opendaylight.mdsal.dom.api.DOMDataTreeShardingConflictException;
  39 import org.opendaylight.mdsal.dom.api.DOMDataTreeWriteCursor;
  40 import org.opendaylight.yang.gen.v1.tag.opendaylight.org._2017.controller.yang.lowlevel.control.rev170215.CreatePrefixShardInput;
  41 import org.opendaylight.yang.gen.v1.tag.opendaylight.org._2017.controller.yang.lowlevel.control.rev170215.ProduceTransactionsOutput;
  42 import org.opendaylight.yang.gen.v1.tag.opendaylight.org._2017.controller.yang.lowlevel.control.rev170215.RemovePrefixShardInput;
  43 import org.opendaylight.yangtools.yang.common.RpcError;
  44 import org.opendaylight.yangtools.yang.common.RpcResult;
  45 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
  46 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  47 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  48 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  49 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
  50 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
  51 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.CollectionNodeBuilder;
  52 import org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableContainerNodeBuilder;
  53 import org.slf4j.Logger;
  54 import org.slf4j.LoggerFactory;
  55
  56 public class PrefixShardHandler {
  57
  58     private static final Logger LOG = LoggerFactory.getLogger(PrefixShardHandler.class);
  59     private static final int MAX_PREFIX = 4;
  60     private static final String PREFIX_TEMPLATE = "prefix-";
  61
  62     private final DistributedShardFactory shardFactory;
  63     private final DOMDataTreeService domDataTreeService;
  64     private final BindingNormalizedNodeSerializer serializer;
  65
  66     private final Map<YangInstanceIdentifier, DistributedShardRegistration> registrations =
  67             Collections.synchronizedMap(new HashMap<>());
  68
  69     public PrefixShardHandler(final DistributedShardFactory shardFactory,
  70                               final DOMDataTreeService domDataTreeService,
  71                               final BindingNormalizedNodeSerializer serializer) {
  72
  73         this.shardFactory = shardFactory;
  74         this.domDataTreeService = domDataTreeService;
  75         this.serializer = serializer;
  76     }
  77
  78     public ListenableFuture<RpcResult<Void>> onCreatePrefixShard(final CreatePrefixShardInput input) {
  79
  80         final SettableFuture<RpcResult<Void>> future = SettableFuture.create();
  81
  82         final CompletionStage<DistributedShardRegistration> completionStage;
  83         final YangInstanceIdentifier identifier = serializer.toYangInstanceIdentifier(input.getPrefix());
  84
  85         try {
  86              completionStage = shardFactory.createDistributedShard(
  87                     new DOMDataTreeIdentifier(LogicalDatastoreType.CONFIGURATION, identifier),
  88                     input.getReplicas().stream().map(MemberName::forName).collect(Collectors.toList()));
  89
  90             completionStage.thenAccept(registration -> {
  91                 LOG.debug("Shard[{}] created successfully.", identifier);
  92                 registrations.put(identifier, registration);
  93
  94                 final CheckedFuture<Void, TransactionCommitFailedException> ensureFuture = ensureListExists();
  95                 Futures.addCallback(ensureFuture, new FutureCallback<Void>() {
  96                     @Override
  97                     public void onSuccess(@Nullable Void result) {
  98                         LOG.debug("Initial list write successful.");
  99                         future.set(RpcResultBuilder.<Void>success().build());
 100                     }
 101
 102                     @Override
 103                     public void onFailure(Throwable throwable) {
 104                         LOG.warn("Shard[{}] creation failed:", identifier, throwable);
 105
 106                         final RpcError error = RpcResultBuilder.newError(RpcError.ErrorType.APPLICATION, "create-shard-failed",
 107                                 "Shard creation failed", "cluster-test-app", "", throwable);
 108                         future.set(RpcResultBuilder.<Void>failed().withRpcError(error).build());
 109                     }
 110                 });
 111
 112             });
 113             completionStage.exceptionally(throwable -> {
 114                 LOG.warn("Shard[{}] creation failed:", identifier, throwable);
 115
 116                 final RpcError error = RpcResultBuilder.newError(RpcError.ErrorType.APPLICATION, "create-shard-failed",
 117                         "Shard creation failed", "cluster-test-app", "", throwable);
 118                 future.set(RpcResultBuilder.<Void>failed().withRpcError(error).build());
 119                 return null;
 120             });
 121         } catch (final DOMDataTreeShardingConflictException e) {
 122             LOG.warn("Unable to register shard for: {}.", identifier);
 123
 124             final RpcError error = RpcResultBuilder.newError(RpcError.ErrorType.APPLICATION, "create-shard-failed",
 125                     "Sharding conflict", "cluster-test-app", "", e);
 126             future.set(RpcResultBuilder.<Void>failed().withRpcError(error).build());
 127         }
 128
 129         return future;
 130     }
 131
 132     public ListenableFuture<RpcResult<Void>> onRemovePrefixShard(final RemovePrefixShardInput input) {
 133
 134         final YangInstanceIdentifier identifier = serializer.toYangInstanceIdentifier(input.getPrefix());
 135         final DistributedShardRegistration registration = registrations.get(identifier);
 136
 137         if (registration == null) {
 138             final RpcError error = RpcResultBuilder.newError(RpcError.ErrorType.APPLICATION, "registration-missing",
 139                     "No shard registered at this prefix.");
 140             return Futures.immediateFuture(RpcResultBuilder.<Void>failed().withRpcError(error).build());
 141         }
 142
 143         final SettableFuture<RpcResult<Void>> future = SettableFuture.create();
 144
 145         final CompletionStage<Void> close = registration.close();
 146         close.thenRun(() -> future.set(RpcResultBuilder.<Void>success().build()));
 147         close.exceptionally(throwable -> {
 148             LOG.warn("Shard[{}] removal failed:", identifier, throwable);
 149
 150             final RpcError error = RpcResultBuilder.newError(RpcError.ErrorType.APPLICATION, "remove-shard-failed",
 151                     "Shard removal failed", "cluster-test-app", "", throwable);
 152             future.set(RpcResultBuilder.<Void>failed().withRpcError(error).build());
 153             return null;
 154         });
 155
 156         return future;
 157     }
 158
 159     private CheckedFuture<Void, TransactionCommitFailedException> ensureListExists() {
 160
 161         final CollectionNodeBuilder<MapEntryNode, MapNode> mapBuilder = ImmutableNodes.mapNodeBuilder(ID_INT);
 162
 163         // hardcoded initial list population for parallel produce-transactions testing on multiple nodes
 164         for (int i = 1; i < MAX_PREFIX; i++) {
 165             mapBuilder.withChild(
 166                     ImmutableNodes.mapEntryBuilder(ID_INT, ID, PREFIX_TEMPLATE + i)
 167                             .withChild(ImmutableNodes.mapNodeBuilder(ITEM).build())
 168                             .build());
 169         }
 170         final MapNode mapNode = mapBuilder.build();
 171
 172         final ContainerNode containerNode = ImmutableContainerNodeBuilder.create()
 173                 .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(ID_INTS))
 174                 .withChild(mapNode)
 175                 .build();
 176
 177         final DOMDataTreeProducer producer = domDataTreeService.createProducer(Collections.singleton(
 178                 new DOMDataTreeIdentifier(LogicalDatastoreType.CONFIGURATION, YangInstanceIdentifier.EMPTY)));
 179
 180         final DOMDataTreeCursorAwareTransaction tx = producer.createTransaction(false);
 181
 182         final DOMDataTreeWriteCursor cursor =
 183                 tx.createCursor(new DOMDataTreeIdentifier(
 184                         LogicalDatastoreType.CONFIGURATION, YangInstanceIdentifier.EMPTY));
 185
 186         cursor.merge(containerNode.getIdentifier(), containerNode);
 187         cursor.close();
 188
 189         final CheckedFuture<Void, TransactionCommitFailedException> future = tx.submit();
 190         Futures.addCallback(future, new FutureCallback<Void>() {
 191             @Override
 192             public void onSuccess(@Nullable Void result) {
 193                 try {
 194                     LOG.debug("Closing producer for initial list.");
 195                     producer.close();
 196                 } catch (DOMDataTreeProducerException e) {
 197                     LOG.warn("Error while closing producer.", e);
 198                 }
 199             }
 200
 201             @Override
 202             public void onFailure(Throwable throwable) {
 203                 //NOOP handled by the caller of this method.
 204             }
 205         });
 206         return future;
 207     }
 208 }