hadoop DeviceResourceUpdaterImpl 源码
haddop DeviceResourceUpdaterImpl 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/containermanager/resourceplugin/deviceframework/DeviceResourceUpdaterImpl.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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.containermanager.resourceplugin.deviceframework;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.yarn.api.records.Resource;
import org.apache.hadoop.yarn.exceptions.YarnException;
import org.apache.hadoop.yarn.server.nodemanager.api.deviceplugin.Device;
import org.apache.hadoop.yarn.server.nodemanager.api.deviceplugin.DevicePlugin;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.resourceplugin.NodeResourceUpdaterPlugin;
import java.util.Set;
/**
* Hooks into NodeStatusUpdater to update resource.
* */
public class DeviceResourceUpdaterImpl extends NodeResourceUpdaterPlugin {
final static Logger LOG = LoggerFactory.
getLogger(DeviceResourceUpdaterImpl.class);
private String resourceName;
private DevicePlugin devicePlugin;
public DeviceResourceUpdaterImpl(String resourceName,
DevicePlugin devicePlugin) {
this.devicePlugin = devicePlugin;
this.resourceName = resourceName;
}
@Override
public void updateConfiguredResource(Resource res)
throws YarnException {
LOG.info(resourceName + " plugin update resource ");
Set<Device> devices = null;
try {
devices = devicePlugin.getDevices();
} catch (Exception e) {
throw new YarnException("Exception thrown from plugin's getDevices"
+ e.getMessage());
}
if (null == devices) {
LOG.warn(resourceName
+ " plugin failed to discover resource ( null value got).");
return;
}
res.setResourceValue(resourceName, devices.size());
}
}
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