| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.cassandra.gms; |
| |
| import java.io.*; |
| import java.net.InetAddress; |
| |
| import org.apache.cassandra.db.TypeSizes; |
| import org.apache.cassandra.io.IVersionedSerializer; |
| import org.apache.cassandra.io.util.DataInputPlus; |
| import org.apache.cassandra.io.util.DataOutputPlus; |
| import org.apache.cassandra.net.CompactEndpointSerializationHelper; |
| |
| /** |
| * Contains information about a specified list of Endpoints and the largest version |
| * of the state they have generated as known by the local endpoint. |
| */ |
| public class GossipDigest implements Comparable<GossipDigest> |
| { |
| public static final IVersionedSerializer<GossipDigest> serializer = new GossipDigestSerializer(); |
| |
| final InetAddress endpoint; |
| final int generation; |
| final int maxVersion; |
| |
| GossipDigest(InetAddress ep, int gen, int version) |
| { |
| endpoint = ep; |
| generation = gen; |
| maxVersion = version; |
| } |
| |
| InetAddress getEndpoint() |
| { |
| return endpoint; |
| } |
| |
| int getGeneration() |
| { |
| return generation; |
| } |
| |
| int getMaxVersion() |
| { |
| return maxVersion; |
| } |
| |
| public int compareTo(GossipDigest gDigest) |
| { |
| if (generation != gDigest.generation) |
| return (generation - gDigest.generation); |
| return (maxVersion - gDigest.maxVersion); |
| } |
| |
| public String toString() |
| { |
| StringBuilder sb = new StringBuilder(); |
| sb.append(endpoint); |
| sb.append(":"); |
| sb.append(generation); |
| sb.append(":"); |
| sb.append(maxVersion); |
| return sb.toString(); |
| } |
| } |
| |
| class GossipDigestSerializer implements IVersionedSerializer<GossipDigest> |
| { |
| public void serialize(GossipDigest gDigest, DataOutputPlus out, int version) throws IOException |
| { |
| CompactEndpointSerializationHelper.serialize(gDigest.endpoint, out); |
| out.writeInt(gDigest.generation); |
| out.writeInt(gDigest.maxVersion); |
| } |
| |
| public GossipDigest deserialize(DataInputPlus in, int version) throws IOException |
| { |
| InetAddress endpoint = CompactEndpointSerializationHelper.deserialize(in); |
| int generation = in.readInt(); |
| int maxVersion = in.readInt(); |
| return new GossipDigest(endpoint, generation, maxVersion); |
| } |
| |
| public long serializedSize(GossipDigest gDigest, int version) |
| { |
| long size = CompactEndpointSerializationHelper.serializedSize(gDigest.endpoint); |
| size += TypeSizes.sizeof(gDigest.generation); |
| size += TypeSizes.sizeof(gDigest.maxVersion); |
| return size; |
| } |
| } |