opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/sharding/DistributedShardModificationContext.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
   9 package org.opendaylight.controller.cluster.sharding;
  10
  11 import org.opendaylight.controller.cluster.databroker.actors.dds.ClientTransaction;
  12 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  13 import org.opendaylight.mdsal.dom.api.DOMDataTreeWriteCursor;
  14 import org.opendaylight.mdsal.dom.spi.store.DOMStoreThreePhaseCommitCohort;
  15
  16 /**
  17  * The context for a single shards modification, keeps a ClientTransaction so it can route requests correctly.
  18  */
  19 public class DistributedShardModificationContext {
  20
  21     private ClientTransaction transaction;
  22     private DOMDataTreeIdentifier identifier;
  23     private DOMDataTreeWriteCursor cursor;
  24
  25     public DistributedShardModificationContext(final ClientTransaction transaction,
  26                                                final DOMDataTreeIdentifier identifier) {
  27         this.transaction = transaction;
  28         this.identifier = identifier;
  29     }
  30
  31     public DOMDataTreeIdentifier getIdentifier() {
  32         return identifier;
  33     }
  34
  35     DOMDataTreeWriteCursor cursor() {
  36         if (cursor == null) {
  37             cursor = transaction.openCursor();
  38         }
  39
  40         return cursor;
  41     }
  42
  43     DOMStoreThreePhaseCommitCohort ready() {
  44         if (cursor != null) {
  45             cursor.close();
  46             cursor = null;
  47         }
  48
  49         return transaction.ready();
  50     }
  51
  52     void closeCursor() {
  53         if (cursor != null) {
  54             cursor.close();
  55             cursor = null;
  56         }
  57     }
  58
  59 }