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.util.concurrent.SettableFuture;
  12 import org.opendaylight.controller.cluster.datastore.exceptions.NoShardLeaderException;
  13 import org.opendaylight.controller.cluster.datastore.identifiers.TransactionIdentifier;
  14 import org.opendaylight.controller.cluster.datastore.messages.AbstractRead;
  15 import org.opendaylight.controller.cluster.datastore.modification.AbstractModification;
  16 import org.opendaylight.controller.md.sal.common.api.data.DataStoreUnavailableException;
  17 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  18 import org.slf4j.Logger;
  19 import org.slf4j.LoggerFactory;
  20 import scala.concurrent.Future;
  21
  22 final class NoOpTransactionContext extends AbstractTransactionContext {
  23     private static final Logger LOG = LoggerFactory.getLogger(NoOpTransactionContext.class);
  24
  25     private final Throwable failure;
  26
  27     public NoOpTransactionContext(Throwable failure, TransactionIdentifier identifier) {
  28         super(identifier);
  29         this.failure = failure;
  30     }
  31
  32     @Override
  33     public void closeTransaction() {
  34         LOG.debug("NoOpTransactionContext {} closeTransaction called", getIdentifier());
  35     }
  36
  37     @Override
  38     public boolean supportsDirectCommit() {
  39         return true;
  40     }
  41
  42     @Override
  43     public Future<Object> directCommit() {
  44         LOG.debug("Tx {} directCommit called, failure: {}", getIdentifier(), failure);
  45         return akka.dispatch.Futures.failed(failure);
  46     }
  47
  48     @Override
  49     public Future<ActorSelection> readyTransaction() {
  50         LOG.debug("Tx {} readyTransaction called, failure: {}", getIdentifier(), failure);
  51         return akka.dispatch.Futures.failed(failure);
  52     }
  53
  54     @Override
  55     public void executeModification(AbstractModification modification) {
  56         LOG.debug("Tx {} executeModification {} called path = {}", getIdentifier(), modification.getClass().getSimpleName(),
  57                 modification.getPath());
  58     }
  59
  60     @Override
  61     public <T> void executeRead(AbstractRead<T> readCmd, SettableFuture<T> proxyFuture) {
  62         LOG.debug("Tx {} executeRead {} called path = {}", getIdentifier(), readCmd.getClass().getSimpleName(),
  63                 readCmd.getPath());
  64
  65         final Throwable t;
  66         if (failure instanceof NoShardLeaderException) {
  67             t = new DataStoreUnavailableException(failure.getMessage(), failure);
  68         } else {
  69             t = failure;
  70         }
  71         proxyFuture.setException(new ReadFailedException("Error executeRead " + readCmd.getClass().getSimpleName()
  72                 + " for path " + readCmd.getPath(), t));
  73     }
  74 }