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