91 lines
2.5 KiB
Java
91 lines
2.5 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.cassandra.gms;
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import java.io.*;
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import org.apache.cassandra.db.TypeSizes;
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import org.apache.cassandra.io.IVersionedSerializer;
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import org.apache.cassandra.io.util.DataOutputPlus;
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/**
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* HeartBeat State associated with any given endpoint.
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*/
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class HeartBeatState
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{
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public static final IVersionedSerializer<HeartBeatState> serializer = new HeartBeatStateSerializer();
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private int generation;
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private int version;
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HeartBeatState(int gen)
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{
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this(gen, 0);
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}
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HeartBeatState(int gen, int ver)
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{
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generation = gen;
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version = ver;
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}
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int getGeneration()
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{
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return generation;
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}
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void updateHeartBeat()
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{
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version = VersionGenerator.getNextVersion();
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}
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int getHeartBeatVersion()
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{
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return version;
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}
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void forceNewerGenerationUnsafe()
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{
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generation += 1;
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}
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public String toString()
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{
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return String.format("HeartBeat: generation = %d, version = %d", generation, version);
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}
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}
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class HeartBeatStateSerializer implements IVersionedSerializer<HeartBeatState>
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{
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public void serialize(HeartBeatState hbState, DataOutputPlus out, int version) throws IOException
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{
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out.writeInt(hbState.getGeneration());
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out.writeInt(hbState.getHeartBeatVersion());
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}
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public HeartBeatState deserialize(DataInput in, int version) throws IOException
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{
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return new HeartBeatState(in.readInt(), in.readInt());
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}
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public long serializedSize(HeartBeatState state, int version)
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{
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return TypeSizes.NATIVE.sizeof(state.getGeneration()) + TypeSizes.NATIVE.sizeof(state.getHeartBeatVersion());
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}
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}
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