git.opendaylight Code Review - controller.git/blob

   1 /*
   2  * Copyright (c) 2014 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.md.sal.dom.broker.impl;
  10
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.util.concurrent.CheckedFuture;
  13 import com.google.common.util.concurrent.FutureCallback;
  14 import com.google.common.util.concurrent.Futures;
  15 import java.util.Collection;
  16 import java.util.Map;
  17 import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
  18 import java.util.concurrent.atomic.AtomicLong;
  19 import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
  20 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  21 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
  22 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  23 import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
  24 import org.opendaylight.controller.md.sal.dom.api.DOMTransactionChain;
  25 import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
  26 import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 /**
  31  * NormalizedNode implementation of {@link org.opendaylight.controller.md.sal.common.api.data.TransactionChain} which is backed
  32  * by several {@link DOMStoreTransactionChain} differentiated by provided
  33  * {@link org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType} type.
  34  *
  35  */
  36 final class DOMDataBrokerTransactionChainImpl extends AbstractDOMForwardedTransactionFactory<DOMStoreTransactionChain>
  37         implements DOMTransactionChain {
  38     private enum State {
  39         RUNNING,
  40         CLOSING,
  41         CLOSED,
  42         FAILED,
  43     }
  44
  45     private static final AtomicIntegerFieldUpdater<DOMDataBrokerTransactionChainImpl> COUNTER_UPDATER =
  46             AtomicIntegerFieldUpdater.newUpdater(DOMDataBrokerTransactionChainImpl.class, "counter");
  47     private static final AtomicReferenceFieldUpdater<DOMDataBrokerTransactionChainImpl, State> STATE_UPDATER =
  48             AtomicReferenceFieldUpdater.newUpdater(DOMDataBrokerTransactionChainImpl.class, State.class, "state");
  49     private static final Logger LOG = LoggerFactory.getLogger(DOMDataBrokerTransactionChainImpl.class);
  50     private final AtomicLong txNum = new AtomicLong();
  51     private final AbstractDOMDataBroker broker;
  52     private final TransactionChainListener listener;
  53     private final long chainId;
  54
  55     private volatile State state = State.RUNNING;
  56     private volatile int counter = 0;
  57
  58     /**
  59      *
  60      * @param chainId
  61      *            ID of transaction chain
  62      * @param chains
  63      *            Backing {@link DOMStoreTransactionChain}s.
  64      * @param broker
  65      *            Commit Coordinator which should be used to coordinate commits
  66      *            of transaction
  67      *            produced by this chain.
  68      * @param listener
  69      *            Listener, which listens on transaction chain events.
  70      * @throws NullPointerException
  71      *             If any of arguments is null.
  72      */
  73     public DOMDataBrokerTransactionChainImpl(final long chainId,
  74             final Map<LogicalDatastoreType, DOMStoreTransactionChain> chains,
  75             final AbstractDOMDataBroker broker, final TransactionChainListener listener) {
  76         super(chains);
  77         this.chainId = chainId;
  78         this.broker = Preconditions.checkNotNull(broker);
  79         this.listener = Preconditions.checkNotNull(listener);
  80     }
  81
  82     private void checkNotFailed() {
  83         Preconditions.checkState(state != State.FAILED, "Transaction chain has failed");
  84     }
  85
  86     @Override
  87     protected Object newTransactionIdentifier() {
  88         return "DOM-CHAIN-" + chainId + "-" + txNum.getAndIncrement();
  89     }
  90
  91     @Override
  92     public CheckedFuture<Void, TransactionCommitFailedException> submit(
  93             final DOMDataWriteTransaction transaction, final Collection<DOMStoreThreePhaseCommitCohort> cohorts) {
  94         checkNotFailed();
  95         checkNotClosed();
  96
  97         final CheckedFuture<Void, TransactionCommitFailedException> ret = broker.submit(transaction, cohorts);
  98
  99         COUNTER_UPDATER.incrementAndGet(this);
 100         Futures.addCallback(ret, new FutureCallback<Void>() {
 101             @Override
 102             public void onSuccess(final Void result) {
 103                 transactionCompleted();
 104             }
 105
 106             @Override
 107             public void onFailure(final Throwable t) {
 108                 transactionFailed(transaction, t);
 109             }
 110         });
 111
 112         return ret;
 113     }
 114
 115     @Override
 116     public void close() {
 117         final boolean success = STATE_UPDATER.compareAndSet(this, State.RUNNING, State.CLOSING);
 118         if (!success) {
 119             LOG.debug("Chain {} is no longer running", this);
 120             return;
 121         }
 122
 123         super.close();
 124         for (DOMStoreTransactionChain subChain : getTxFactories().values()) {
 125             subChain.close();
 126         }
 127
 128         if (counter == 0) {
 129             finishClose();
 130         }
 131     }
 132
 133     private void finishClose() {
 134         state = State.CLOSED;
 135         listener.onTransactionChainSuccessful(this);
 136     }
 137
 138     private void transactionCompleted() {
 139         if (COUNTER_UPDATER.decrementAndGet(this) == 0 && state == State.CLOSING) {
 140             finishClose();
 141         }
 142     }
 143
 144     private void transactionFailed(final DOMDataWriteTransaction tx, final Throwable cause) {
 145         state = State.FAILED;
 146         LOG.debug("Transaction chain {} failed.", this, cause);
 147         listener.onTransactionChainFailed(this, tx, cause);
 148     }
 149 }