dom/mdsal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/broker/impl/ShardedDOMDataWriteTransaction.java

   1 /*
   2  * Copyright (c) 2015 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.md.sal.dom.broker.impl;
   9
  10 import com.google.common.base.Preconditions;
  11 import com.google.common.collect.ImmutableSet;
  12 import com.google.common.util.concurrent.CheckedFuture;
  13 import com.google.common.util.concurrent.Futures;
  14 import com.google.common.util.concurrent.ListenableFuture;
  15 import java.util.ArrayList;
  16 import java.util.List;
  17 import java.util.Map;
  18 import java.util.Map.Entry;
  19 import java.util.Set;
  20 import java.util.concurrent.atomic.AtomicLong;
  21 import javax.annotation.concurrent.GuardedBy;
  22 import javax.annotation.concurrent.NotThreadSafe;
  23 import org.opendaylight.controller.md.sal.common.api.TransactionStatus;
  24 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  25 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  26 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeIdentifier;
  27 import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
  28 import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
  29 import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
  30 import org.opendaylight.yangtools.yang.common.RpcResult;
  31 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  32 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  33 import org.slf4j.Logger;
  34 import org.slf4j.LoggerFactory;
  35
  36 @NotThreadSafe
  37 final class ShardedDOMDataWriteTransaction implements DOMDataWriteTransaction {
  38     private static final Logger LOG = LoggerFactory.getLogger(ShardedDOMDataWriteTransaction.class);
  39     private static final AtomicLong COUNTER = new AtomicLong();
  40     private final Map<DOMDataTreeIdentifier, DOMStoreWriteTransaction> idToTransaction;
  41     private final ShardedDOMDataTreeProducer producer;
  42     private final String identifier;
  43     @GuardedBy("this")
  44     private boolean closed =  false;
  45
  46     ShardedDOMDataWriteTransaction(final ShardedDOMDataTreeProducer producer, final Map<DOMDataTreeIdentifier, DOMStoreWriteTransaction> idToTransaction) {
  47         this.producer = Preconditions.checkNotNull(producer);
  48         this.idToTransaction = Preconditions.checkNotNull(idToTransaction);
  49         this.identifier = "SHARDED-DOM-" + COUNTER.getAndIncrement();
  50     }
  51
  52     // FIXME: use atomic operations
  53     @GuardedBy("this")
  54     private DOMStoreWriteTransaction lookup(final LogicalDatastoreType store, final YangInstanceIdentifier path) {
  55         final DOMDataTreeIdentifier id = new DOMDataTreeIdentifier(store, path);
  56
  57         for (final Entry<DOMDataTreeIdentifier, DOMStoreWriteTransaction> e : idToTransaction.entrySet()) {
  58             if (e.getKey().contains(id)) {
  59                 return e.getValue();
  60             }
  61         }
  62
  63         throw new IllegalArgumentException(String.format("Path %s is not acessible from transaction %s", id, this));
  64     }
  65
  66     @Override
  67     public String getIdentifier() {
  68         return identifier;
  69     }
  70
  71     @Override
  72     public synchronized boolean cancel() {
  73         if (closed) {
  74             return false;
  75         }
  76
  77         LOG.debug("Cancelling transaction {}", identifier);
  78         for (final DOMStoreWriteTransaction tx : ImmutableSet.copyOf(idToTransaction.values())) {
  79             tx.close();
  80         }
  81
  82         closed = true;
  83         producer.cancelTransaction(this);
  84         return true;
  85     }
  86
  87     @Override
  88     public synchronized CheckedFuture<Void, TransactionCommitFailedException> submit() {
  89         Preconditions.checkState(!closed, "Transaction %s is already closed", identifier);
  90
  91         final Set<DOMStoreWriteTransaction> txns = ImmutableSet.copyOf(idToTransaction.values());
  92         final List<DOMStoreThreePhaseCommitCohort> cohorts = new ArrayList<>(txns.size());
  93         for (final DOMStoreWriteTransaction tx : txns) {
  94             cohorts.add(tx.ready());
  95         }
  96
  97         try {
  98             return Futures.immediateCheckedFuture(new CommitCoordinationTask(this, cohorts, null).call());
  99         } catch (final TransactionCommitFailedException e) {
 100             return Futures.immediateFailedCheckedFuture(e);
 101         }
 102     }
 103
 104     @Override
 105     @Deprecated
 106     public ListenableFuture<RpcResult<TransactionStatus>> commit() {
 107         return CommitCompatibility.convertToLegacyCommitFuture(submit());
 108     }
 109
 110     @Override
 111     public synchronized void delete(final LogicalDatastoreType store, final YangInstanceIdentifier path) {
 112         lookup(store, path).delete(path);
 113     }
 114
 115     @Override
 116     public synchronized void put(final LogicalDatastoreType store, final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
 117         lookup(store, path).write(path, data);
 118     }
 119
 120     @Override
 121     public synchronized void merge(final LogicalDatastoreType store, final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
 122         lookup(store, path).merge(path, data);
 123     }
 124 }