opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/messages/InstallSnapshot.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.raft.messages;
  10
  11 import com.google.common.base.Optional;
  12 import java.io.Externalizable;
  13 import java.io.IOException;
  14 import java.io.ObjectInput;
  15 import java.io.ObjectOutput;
  16 import org.opendaylight.controller.cluster.raft.persisted.ServerConfigurationPayload;
  17
  18 public class InstallSnapshot extends AbstractRaftRPC {
  19     private static final long serialVersionUID = 1L;
  20
  21     private final String leaderId;
  22     private final long lastIncludedIndex;
  23     private final long lastIncludedTerm;
  24     private final byte[] data;
  25     private final int chunkIndex;
  26     private final int totalChunks;
  27     private final Optional<Integer> lastChunkHashCode;
  28     private final Optional<ServerConfigurationPayload> serverConfig;
  29
  30     public InstallSnapshot(long term, String leaderId, long lastIncludedIndex, long lastIncludedTerm, byte[] data,
  31             int chunkIndex, int totalChunks, Optional<Integer> lastChunkHashCode, Optional<ServerConfigurationPayload> serverConfig) {
  32         super(term);
  33         this.leaderId = leaderId;
  34         this.lastIncludedIndex = lastIncludedIndex;
  35         this.lastIncludedTerm = lastIncludedTerm;
  36         this.data = data;
  37         this.chunkIndex = chunkIndex;
  38         this.totalChunks = totalChunks;
  39         this.lastChunkHashCode = lastChunkHashCode;
  40         this.serverConfig = serverConfig;
  41     }
  42
  43     public InstallSnapshot(long term, String leaderId, long lastIncludedIndex,
  44                            long lastIncludedTerm, byte[] data, int chunkIndex, int totalChunks) {
  45         this(term, leaderId, lastIncludedIndex, lastIncludedTerm, data, chunkIndex, totalChunks,
  46                 Optional.<Integer>absent(), Optional.<ServerConfigurationPayload>absent());
  47     }
  48
  49     public String getLeaderId() {
  50         return leaderId;
  51     }
  52
  53     public long getLastIncludedIndex() {
  54         return lastIncludedIndex;
  55     }
  56
  57     public long getLastIncludedTerm() {
  58         return lastIncludedTerm;
  59     }
  60
  61     public byte[] getData() {
  62         return data;
  63     }
  64
  65     public int getChunkIndex() {
  66         return chunkIndex;
  67     }
  68
  69     public int getTotalChunks() {
  70         return totalChunks;
  71     }
  72
  73     public Optional<Integer> getLastChunkHashCode() {
  74         return lastChunkHashCode;
  75     }
  76
  77     public Optional<ServerConfigurationPayload> getServerConfig() {
  78         return serverConfig;
  79     }
  80
  81
  82     public <T> Object toSerializable(short version) {
  83         return this;
  84     }
  85
  86     @Override
  87     public String toString() {
  88         return "InstallSnapshot [term=" + getTerm() + ", leaderId=" + leaderId + ", lastIncludedIndex="
  89                 + lastIncludedIndex + ", lastIncludedTerm=" + lastIncludedTerm + ", datasize=" + data.length
  90                 + ", Chunk=" + chunkIndex + "/" + totalChunks + ", lastChunkHashCode=" + lastChunkHashCode
  91                 + ", serverConfig=" + serverConfig.orNull() + "]";
  92     }
  93
  94     private Object writeReplace() {
  95         return new Proxy(this);
  96     }
  97
  98     private static class Proxy implements Externalizable {
  99         private static final long serialVersionUID = 1L;
 100
 101         private InstallSnapshot installSnapshot;
 102
 103         public Proxy() {
 104         }
 105
 106         Proxy(InstallSnapshot installSnapshot) {
 107             this.installSnapshot = installSnapshot;
 108         }
 109
 110         @Override
 111         public void writeExternal(ObjectOutput out) throws IOException {
 112             out.writeLong(installSnapshot.getTerm());
 113             out.writeObject(installSnapshot.leaderId);
 114             out.writeLong(installSnapshot.lastIncludedIndex);
 115             out.writeLong(installSnapshot.lastIncludedTerm);
 116             out.writeInt(installSnapshot.chunkIndex);
 117             out.writeInt(installSnapshot.totalChunks);
 118
 119             out.writeByte(installSnapshot.lastChunkHashCode.isPresent() ? 1 : 0);
 120             if(installSnapshot.lastChunkHashCode.isPresent()) {
 121                 out.writeInt(installSnapshot.lastChunkHashCode.get().intValue());
 122             }
 123
 124             out.writeByte(installSnapshot.serverConfig.isPresent() ? 1 : 0);
 125             if(installSnapshot.serverConfig.isPresent()) {
 126                 out.writeObject(installSnapshot.serverConfig.get());
 127             }
 128
 129             out.writeObject(installSnapshot.data);
 130         }
 131
 132         @Override
 133         public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
 134             long term = in.readLong();
 135             String leaderId = (String) in.readObject();
 136             long lastIncludedIndex = in.readLong();
 137             long lastIncludedTerm = in.readLong();
 138             int chunkIndex = in.readInt();
 139             int totalChunks = in.readInt();
 140
 141             Optional<Integer> lastChunkHashCode = Optional.absent();
 142             boolean chunkHashCodePresent = in.readByte() == 1;
 143             if(chunkHashCodePresent) {
 144                 lastChunkHashCode = Optional.of(in.readInt());
 145             }
 146
 147             Optional<ServerConfigurationPayload> serverConfig = Optional.absent();
 148             boolean serverConfigPresent = in.readByte() == 1;
 149             if(serverConfigPresent) {
 150                 serverConfig = Optional.of((ServerConfigurationPayload)in.readObject());
 151             }
 152
 153             byte[] data = (byte[])in.readObject();
 154
 155             installSnapshot = new InstallSnapshot(term, leaderId, lastIncludedIndex, lastIncludedTerm, data,
 156                     chunkIndex, totalChunks, lastChunkHashCode, serverConfig);
 157         }
 158
 159         private Object readResolve() {
 160             return installSnapshot;
 161         }
 162     }
 163 }