| /* |
| * 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.hadoop.hbase; |
| |
| import java.io.IOException; |
| import java.util.UUID; |
| |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.apache.hadoop.hbase.exceptions.DeserializationException; |
| import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil; |
| import org.apache.hadoop.hbase.shaded.protobuf.generated.ClusterIdProtos; |
| import org.apache.hadoop.hbase.util.Bytes; |
| |
| /** |
| * The identifier for this cluster. |
| * It is serialized to the filesystem and up into zookeeper. This is a container for the id. |
| * Also knows how to serialize and deserialize the cluster id. |
| */ |
| @InterfaceAudience.Private |
| public class ClusterId { |
| private final String id; |
| |
| /** |
| * New ClusterID. Generates a uniqueid. |
| */ |
| public ClusterId() { |
| this(UUID.randomUUID().toString()); |
| } |
| |
| public ClusterId(final String uuid) { |
| this.id = uuid; |
| } |
| |
| /** |
| * @return The clusterid serialized using pb w/ pb magic prefix |
| */ |
| public byte [] toByteArray() { |
| return ProtobufUtil.prependPBMagic(convert().toByteArray()); |
| } |
| |
| /** |
| * @param bytes A pb serialized {@link ClusterId} instance with pb magic prefix |
| * @return An instance of {@link ClusterId} made from <code>bytes</code> |
| * @throws DeserializationException |
| * @see #toByteArray() |
| */ |
| public static ClusterId parseFrom(final byte [] bytes) throws DeserializationException { |
| if (ProtobufUtil.isPBMagicPrefix(bytes)) { |
| int pblen = ProtobufUtil.lengthOfPBMagic(); |
| ClusterIdProtos.ClusterId.Builder builder = ClusterIdProtos.ClusterId.newBuilder(); |
| ClusterIdProtos.ClusterId cid = null; |
| try { |
| ProtobufUtil.mergeFrom(builder, bytes, pblen, bytes.length - pblen); |
| cid = builder.build(); |
| } catch (IOException e) { |
| throw new DeserializationException(e); |
| } |
| return convert(cid); |
| } else { |
| // Presume it was written out this way, the old way. |
| return new ClusterId(Bytes.toString(bytes)); |
| } |
| } |
| |
| /** |
| * @return A pb instance to represent this instance. |
| */ |
| public ClusterIdProtos.ClusterId convert() { |
| ClusterIdProtos.ClusterId.Builder builder = ClusterIdProtos.ClusterId.newBuilder(); |
| return builder.setClusterId(this.id).build(); |
| } |
| |
| /** |
| * @param cid |
| * @return A {@link ClusterId} made from the passed in <code>cid</code> |
| */ |
| public static ClusterId convert(final ClusterIdProtos.ClusterId cid) { |
| return new ClusterId(cid.getClusterId()); |
| } |
| |
| /** |
| * @see java.lang.Object#toString() |
| */ |
| @Override |
| public String toString() { |
| return this.id; |
| } |
| } |