opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/sharding/DistributedShardModification.java

   1 /*
   2  * Copyright (c) 2016 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.sharding;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import java.util.Map;
  13 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  14 import org.opendaylight.mdsal.dom.api.DOMDataTreeWriteCursor;
  15 import org.opendaylight.mdsal.dom.spi.shard.ForeignShardModificationContext;
  16 import org.opendaylight.mdsal.dom.spi.shard.WritableNodeOperation;
  17 import org.opendaylight.mdsal.dom.spi.shard.WriteCursorStrategy;
  18 import org.opendaylight.mdsal.dom.spi.shard.WriteableModificationNode;
  19 import org.opendaylight.mdsal.dom.spi.shard.WriteableNodeWithSubshard;
  20 import org.opendaylight.mdsal.dom.spi.store.DOMStoreThreePhaseCommitCohort;
  21 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  22
  23 /**
  24  * Shard modification that consists of the whole shard context, provides cursors which correctly delegate to subshards
  25  * if any are present.
  26  */
  27 @Deprecated(forRemoval = true)
  28 public class DistributedShardModification extends WriteableNodeWithSubshard {
  29
  30     private final DistributedShardModificationContext context;
  31     private final Map<DOMDataTreeIdentifier, ForeignShardModificationContext> childShards;
  32
  33     public DistributedShardModification(final DistributedShardModificationContext context,
  34                                         final Map<PathArgument, WriteableModificationNode> subshards,
  35                                         final Map<DOMDataTreeIdentifier, ForeignShardModificationContext> childShards) {
  36         super(subshards);
  37         this.context = requireNonNull(context);
  38         this.childShards = requireNonNull(childShards);
  39     }
  40
  41     @Override
  42     public PathArgument getIdentifier() {
  43         return context.getIdentifier().getRootIdentifier().getLastPathArgument();
  44     }
  45
  46     @Override
  47     public WriteCursorStrategy createOperation(final DOMDataTreeWriteCursor parentCursor) {
  48         return new WritableNodeOperation(this, context.cursor()) {
  49             @Override
  50             public void exit() {
  51                 throw new IllegalStateException("Can not exit data tree root");
  52             }
  53         };
  54     }
  55
  56     void cursorClosed() {
  57         context.closeCursor();
  58     }
  59
  60     DOMStoreThreePhaseCommitCohort seal() {
  61         childShards.values().stream().filter(ForeignShardModificationContext::isModified)
  62                 .forEach(ForeignShardModificationContext::ready);
  63
  64         return context.ready();
  65     }
  66
  67     DOMDataTreeIdentifier getPrefix() {
  68         return context.getIdentifier();
  69     }
  70
  71     Map<DOMDataTreeIdentifier, ForeignShardModificationContext> getChildShards() {
  72         return childShards;
  73     }
  74 }