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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.

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/*
 * 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.repair;

import java.io.IOException;
import java.net.InetAddress;

import com.google.common.base.Objects;

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;

/**
 * NodePair is used for repair message body to indicate the pair of nodes.
 *
 * @since 2.0
 */
public class NodePair
{
    public static IVersionedSerializer serializer = new NodePairSerializer();

    public final InetAddress endpoint1;
    public final InetAddress endpoint2;

    public NodePair(InetAddress endpoint1, InetAddress endpoint2)
    {
        this.endpoint1 = endpoint1;
        this.endpoint2 = endpoint2;
    }

    @Override
    public boolean equals(Object o)
    {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        NodePair nodePair = (NodePair) o;
        return endpoint1.equals(nodePair.endpoint1) && endpoint2.equals(nodePair.endpoint2);
    }

    @Override
    public int hashCode()
    {
        return Objects.hashCode(endpoint1, endpoint2);
    }

    public static class NodePairSerializer implements IVersionedSerializer
    {
        public void serialize(NodePair nodePair, DataOutputPlus out, int version) throws IOException
        {
            CompactEndpointSerializationHelper.serialize(nodePair.endpoint1, out);
            CompactEndpointSerializationHelper.serialize(nodePair.endpoint2, out);
        }

        public NodePair deserialize(DataInputPlus in, int version) throws IOException
        {
            InetAddress ep1 = CompactEndpointSerializationHelper.deserialize(in);
            InetAddress ep2 = CompactEndpointSerializationHelper.deserialize(in);
            return new NodePair(ep1, ep2);
        }

        public long serializedSize(NodePair nodePair, int version)
        {
            return 2 * CompactEndpointSerializationHelper.serializedSize(nodePair.endpoint1);
        }
    }
}