hadoop ConfigurationNodeLabelsProvider 源码
haddop ConfigurationNodeLabelsProvider 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/nodelabels/ConfigurationNodeLabelsProvider.java
/**
* 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 NodeLabelsProvider {
private static final Logger LOG =
LoggerFactory.getLogger(ConfigurationNodeLabelsProvider.class);
public ConfigurationNodeLabelsProvider() {
super("Configuration Based NodeLabels Provider");
}
@Override
protected void serviceInit(Configuration conf) throws Exception {
long taskInterval = conf.getLong(
YarnConfiguration.NM_NODE_LABELS_PROVIDER_FETCH_INTERVAL_MS,
YarnConfiguration.DEFAULT_NM_NODE_LABELS_PROVIDER_FETCH_INTERVAL_MS);
this.setIntervalTime(taskInterval);
super.serviceInit(conf);
}
private void updateNodeLabelsFromConfig(Configuration conf)
throws IOException {
String configuredNodePartition =
conf.get(YarnConfiguration.NM_PROVIDER_CONFIGURED_NODE_PARTITION, null);
setDescriptors(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!
}
}
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