/**
 * 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.hdfs.server.protocol;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.hdfs.protocol.HdfsConstants;
import org.apache.hadoop.hdfs.server.common.Storage;
import org.apache.hadoop.hdfs.server.common.StorageInfo;
import org.apache.hadoop.util.VersionInfo;

/**
 * NamespaceInfo is returned by the name-node in reply
 * to a data-node handshake.
 */
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class NamespaceInfo extends StorageInfo {
  String buildVersion;
  String blockPoolID = "";    // id of the block pool
  String softwareVersion;

  public NamespaceInfo() {
    super();
    buildVersion = null;
  }

  public NamespaceInfo(int nsID, String clusterID, String bpID, long cT,
      String buildVersion, String softwareVersion) {
    super(HdfsConstants.LAYOUT_VERSION, nsID, clusterID, cT, bpID);
    blockPoolID = bpID;
    this.buildVersion = buildVersion;
    this.softwareVersion = softwareVersion;
  }

  public NamespaceInfo(int nsID, String clusterID, String bpID, long cT) {
    this(nsID, clusterID, bpID, cT, Storage.getBuildVersion(),
        VersionInfo.getVersion());
  }
  
  public String getBuildVersion() {
    return buildVersion;
  }

  public String getBlockPoolID() {
    return blockPoolID;
  }
  
  public String getSoftwareVersion() {
    return softwareVersion;
  }

  @Override
  public String toString() {
    return super.toString() + ";bpid=" + blockPoolID;
  }
}