opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/NoOpTransactionContext.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.cluster.datastore;
   9
  10 import akka.actor.ActorSelection;
  11 import com.google.common.base.Optional;
  12 import com.google.common.util.concurrent.SettableFuture;
  13 import java.util.concurrent.Semaphore;
  14
  15 import org.opendaylight.controller.cluster.datastore.exceptions.NoShardLeaderException;
  16 import org.opendaylight.controller.cluster.datastore.identifiers.TransactionIdentifier;
  17 import org.opendaylight.controller.md.sal.common.api.data.DataStoreUnavailableException;
  18 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  19 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  20 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23 import scala.concurrent.Future;
  24
  25 final class NoOpTransactionContext extends AbstractTransactionContext {
  26     private static final Logger LOG = LoggerFactory.getLogger(NoOpTransactionContext.class);
  27
  28     private final Throwable failure;
  29     private final Semaphore operationLimiter;
  30
  31     public NoOpTransactionContext(Throwable failure, TransactionIdentifier identifier, Semaphore operationLimiter) {
  32         super(identifier);
  33         this.failure = failure;
  34         this.operationLimiter = operationLimiter;
  35     }
  36
  37     @Override
  38     public void closeTransaction() {
  39         LOG.debug("NoOpTransactionContext {} closeTransaction called", getIdentifier());
  40     }
  41
  42     @Override
  43     public boolean supportsDirectCommit() {
  44         return true;
  45     }
  46
  47     @Override
  48     public Future<Object> directCommit() {
  49         LOG.debug("Tx {} directCommit called, failure: {}", getIdentifier(), failure);
  50         operationLimiter.release();
  51         return akka.dispatch.Futures.failed(failure);
  52     }
  53
  54     @Override
  55     public Future<ActorSelection> readyTransaction() {
  56         LOG.debug("Tx {} readyTransaction called, failure: {}", getIdentifier(), failure);
  57         operationLimiter.release();
  58         return akka.dispatch.Futures.failed(failure);
  59     }
  60
  61     @Override
  62     public void deleteData(YangInstanceIdentifier path) {
  63         LOG.debug("Tx {} deleteData called path = {}", getIdentifier(), path);
  64         operationLimiter.release();
  65     }
  66
  67     @Override
  68     public void mergeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
  69         LOG.debug("Tx {} mergeData called path = {}", getIdentifier(), path);
  70         operationLimiter.release();
  71     }
  72
  73     @Override
  74     public void writeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
  75         LOG.debug("Tx {} writeData called path = {}", getIdentifier(), path);
  76         operationLimiter.release();
  77     }
  78
  79     @Override
  80     public void readData(final YangInstanceIdentifier path, SettableFuture<Optional<NormalizedNode<?, ?>>> proxyFuture) {
  81         LOG.debug("Tx {} readData called path = {}", getIdentifier(), path);
  82         operationLimiter.release();
  83         Throwable t;
  84         if(failure instanceof NoShardLeaderException) {
  85             t = new DataStoreUnavailableException(failure.getMessage(), failure);
  86         } else {
  87             t = failure;
  88         }
  89         proxyFuture.setException(new ReadFailedException("Error reading data for path " + path, t));
  90     }
  91
  92     @Override
  93     public void dataExists(YangInstanceIdentifier path, SettableFuture<Boolean> proxyFuture) {
  94         LOG.debug("Tx {} dataExists called path = {}", getIdentifier(), path);
  95         operationLimiter.release();
  96         proxyFuture.setException(new ReadFailedException("Error checking exists for path " + path, failure));
  97     }
  98 }