| /** |
| * 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.yarn.server.nodemanager.nodelabels; |
| |
| import java.io.IOException; |
| import java.util.TimerTask; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.yarn.conf.YarnConfiguration; |
| |
| /** |
| * Provides Node's Labels by constantly monitoring the configuration. |
| */ |
| public class ConfigurationNodeLabelsProvider extends AbstractNodeLabelsProvider { |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(ConfigurationNodeLabelsProvider.class); |
| |
| public ConfigurationNodeLabelsProvider() { |
| super("Configuration Based NodeLabels Provider"); |
| } |
| |
| private void updateNodeLabelsFromConfig(Configuration conf) |
| throws IOException { |
| String configuredNodePartition = |
| conf.get(YarnConfiguration.NM_PROVIDER_CONFIGURED_NODE_PARTITION, null); |
| setNodeLabels(convertToNodeLabelSet(configuredNodePartition)); |
| } |
| |
| private class ConfigurationMonitorTimerTask extends TimerTask { |
| @Override |
| public void run() { |
| try { |
| updateNodeLabelsFromConfig(new YarnConfiguration()); |
| } catch (Exception e) { |
| LOG.error("Failed to update node Labels from configuration.xml ", e); |
| } |
| } |
| } |
| |
| @Override |
| public TimerTask createTimerTask() { |
| return new ConfigurationMonitorTimerTask(); |
| } |
| |
| @Override |
| protected void cleanUp() throws Exception { |
| //No cleanup Req! |
| } |
| } |