/**
* 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.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.InetAddress;
import org.apache.cassandra.io.ICompactSerializer;
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>
{
private static ICompactSerializer<GossipDigest> serializer;
static
{
serializer = new GossipDigestSerializer();
}
InetAddress endpoint;
int generation;
int maxVersion;
public static ICompactSerializer<GossipDigest> serializer()
{
return serializer;
}
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 ICompactSerializer<GossipDigest>
{
public void serialize(GossipDigest gDigest, DataOutputStream dos, int version) throws IOException
{
CompactEndpointSerializationHelper.serialize(gDigest.endpoint, dos);
dos.writeInt(gDigest.generation);
dos.writeInt(gDigest.maxVersion);
}
public GossipDigest deserialize(DataInputStream dis, int version) throws IOException
{
InetAddress endpoint = CompactEndpointSerializationHelper.deserialize(dis);
int generation = dis.readInt();
int maxVersion = dis.readInt();
return new GossipDigest(endpoint, generation, maxVersion);
}
}