content: /**
   *
   * 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 com.alibaba.wasp;
  
  import com.alibaba.wasp.protobuf.generated.ClusterIdProtos;
  import com.google.protobuf.InvalidProtocolBufferException;
  
  import java.util.UUID;
  
  /**
   * 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.
   */
  public class ClusterId {
    private final String id;
  
    /**
     * New ClusterID. Generates a uniqueid.
     */
    public ClusterId() {
      this(UUID.randomUUID().toString());
    }
  
    ClusterId(final String uuid) {
      this.id = uuid;
    }
  
    /**
     * @return The clusterid serialized using pb w/ pb magic prefix
     */
    public byte[] toByteArray() {
      return 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 {@link #toByteArray()}
     */
    public static ClusterId parseFrom(final byte[] bytes)
        throws DeserializationException {
      ClusterIdProtos.ClusterId.Builder builder = ClusterIdProtos.ClusterId
          .newBuilder();
      ClusterIdProtos.ClusterId cid = null;
      try {
        cid = builder.mergeFrom(bytes, 0, bytes.length).build();
      } catch (InvalidProtocolBufferException e) {
        throw new DeserializationException(e);
      }
      return convert(cid);
    }
  
    /**
     * @return A pb instance to represent this instance.
     */
    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>
     */
    static ClusterId convert(final ClusterIdProtos.ClusterId cid) {
      return new ClusterId(cid.getClusterId());
    }
  
    /**
     * @see Object#toString()
     */
    @Override
    public String toString() {
      return this.id;
    }
  
    public boolean hasId() {
      return this.id != null && !("").equals(id.trim());
    }
  
    public String getId() {
      return id;
    }
  }
  