opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/messages/CanCommitTransactionReply.java

   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.cluster.datastore.messages;
  10
  11 import java.io.IOException;
  12 import java.io.ObjectInput;
  13 import java.io.ObjectOutput;
  14 import org.opendaylight.controller.cluster.datastore.DataStoreVersions;
  15 import org.opendaylight.controller.protobuff.messages.cohort3pc.ThreePhaseCommitCohortMessages;
  16
  17 public class CanCommitTransactionReply extends VersionedExternalizableMessage {
  18     private static final CanCommitTransactionReply YES =
  19             new CanCommitTransactionReply(true, DataStoreVersions.CURRENT_VERSION);
  20     private static final CanCommitTransactionReply NO =
  21             new CanCommitTransactionReply(false, DataStoreVersions.CURRENT_VERSION);
  22
  23     private static final ThreePhaseCommitCohortMessages.CanCommitTransactionReply YES_SERIALIZED =
  24             ThreePhaseCommitCohortMessages.CanCommitTransactionReply.newBuilder().setCanCommit(true).build();
  25
  26     private static final ThreePhaseCommitCohortMessages.CanCommitTransactionReply NO_SERIALIZED =
  27             ThreePhaseCommitCohortMessages.CanCommitTransactionReply.newBuilder().setCanCommit(false).build();
  28
  29     private boolean canCommit;
  30
  31     public CanCommitTransactionReply() {
  32     }
  33
  34     private CanCommitTransactionReply(final boolean canCommit, final short version) {
  35         super(version);
  36         this.canCommit = canCommit;
  37     }
  38
  39     public boolean getCanCommit() {
  40         return canCommit;
  41     }
  42
  43     @Override
  44     public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
  45         super.readExternal(in);
  46         canCommit = in.readBoolean();
  47     }
  48
  49     @Override
  50     public void writeExternal(ObjectOutput out) throws IOException {
  51         super.writeExternal(out);
  52         out.writeBoolean(canCommit);
  53     }
  54
  55     @Override
  56     public Object toSerializable() {
  57         if(getVersion() >= DataStoreVersions.BORON_VERSION) {
  58             return this;
  59         } else {
  60             return canCommit ? YES_SERIALIZED : NO_SERIALIZED;
  61         }
  62     }
  63
  64     @Override
  65     public String toString() {
  66         return "CanCommitTransactionReply [canCommit=" + canCommit + ", version=" + getVersion() + "]";
  67     }
  68
  69     public static CanCommitTransactionReply yes(short version) {
  70         return version == DataStoreVersions.CURRENT_VERSION ? YES : new CanCommitTransactionReply(true, version);
  71     }
  72
  73     public static CanCommitTransactionReply no(short version) {
  74         return version == DataStoreVersions.CURRENT_VERSION ? NO : new CanCommitTransactionReply(false, version);
  75     }
  76
  77     public static CanCommitTransactionReply fromSerializable(final Object serializable) {
  78         if(serializable instanceof CanCommitTransactionReply) {
  79             return (CanCommitTransactionReply)serializable;
  80         } else {
  81             ThreePhaseCommitCohortMessages.CanCommitTransactionReply serialized =
  82                     (ThreePhaseCommitCohortMessages.CanCommitTransactionReply) serializable;
  83             return serialized.getCanCommit() ? YES : NO;
  84         }
  85     }
  86
  87     public static boolean isSerializedType(Object message) {
  88         return message instanceof CanCommitTransactionReply ||
  89                 message instanceof ThreePhaseCommitCohortMessages.CanCommitTransactionReply;
  90     }
  91 }