/*
* 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 gobblin.util;
import java.util.Map;
import org.apache.hadoop.conf.Configuration;
import com.google.common.base.Strings;
import com.google.common.collect.ImmutableMap;
/**
* Utility class for collecting metadata specific to the current Hadoop cluster.
*
* @see ClustersNames
*/
public class ClusterNameTags {
public static final String CLUSTER_IDENTIFIER_TAG_NAME = "clusterIdentifier";
/**
* Uses {@link #getClusterNameTags(Configuration)} with default Hadoop {@link Configuration}.
*
* @return a {@link Map} of key, value pairs containing the cluster metadata
*/
public static Map<String, String> getClusterNameTags() {
return getClusterNameTags(new Configuration());
}
/**
* Gets all useful Hadoop cluster metrics.
*
* @param conf a Hadoop {@link Configuration} to collect the metadata from
*
* @return a {@link Map} of key, value pairs containing the cluster metadata
*/
public static Map<String, String> getClusterNameTags(Configuration conf) {
ImmutableMap.Builder<String, String> tagMap = ImmutableMap.builder();
String clusterIdentifierTag = ClustersNames.getInstance().getClusterName(conf);
if (!Strings.isNullOrEmpty(clusterIdentifierTag)) {
tagMap.put(CLUSTER_IDENTIFIER_TAG_NAME, clusterIdentifierTag);
}
return tagMap.build();
}
}