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