/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.index.shard;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Streamable;
import org.elasticsearch.index.Index;
import java.io.IOException;
import java.io.Serializable;
/**
* Allows for shard level components to be injected with the shard id.
*/
public class ShardId implements Serializable, Streamable, Comparable<ShardId> {
private Index index;
private int shardId;
private int hashCode;
private ShardId() {
}
public ShardId(String index, int shardId) {
this(new Index(index), shardId);
}
public ShardId(Index index, int shardId) {
this.index = index;
this.shardId = shardId;
this.hashCode = computeHashCode();
}
public Index index() {
return this.index;
}
public String getIndex() {
return index().name();
}
public int id() {
return this.shardId;
}
public int getId() {
return id();
}
@Override
public String toString() {
return "[" + index.name() + "][" + shardId + "]";
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null) return false;
ShardId shardId1 = (ShardId) o;
return shardId == shardId1.shardId && index.name().equals(shardId1.index.name());
}
@Override
public int hashCode() {
return hashCode;
}
private int computeHashCode() {
int result = index != null ? index.hashCode() : 0;
result = 31 * result + shardId;
return result;
}
public static ShardId readShardId(StreamInput in) throws IOException {
ShardId shardId = new ShardId();
shardId.readFrom(in);
return shardId;
}
@Override
public void readFrom(StreamInput in) throws IOException {
index = Index.readIndexName(in);
shardId = in.readVInt();
hashCode = computeHashCode();
}
@Override
public void writeTo(StreamOutput out) throws IOException {
index.writeTo(out);
out.writeVInt(shardId);
}
@Override
public int compareTo(ShardId o) {
if (o.getId() == shardId) {
return index.name().compareTo(o.getIndex());
}
return Integer.compare(shardId, o.getId());
}
}