hadoop FileBasedCSConfigurationProvider 源码
haddop FileBasedCSConfigurationProvider 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/conf/FileBasedCSConfigurationProvider.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.resourcemanager.scheduler.capacity.conf;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.server.resourcemanager.RMContext;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacitySchedulerConfiguration;
import java.io.IOException;
import java.io.InputStream;
/**
* {@link CapacityScheduler} configuration provider based on local
* {@code capacity-scheduler.xml} file.
*/
public class FileBasedCSConfigurationProvider implements
CSConfigurationProvider {
private RMContext rmContext;
/**
* Construct file based CS configuration provider with given context.
* @param rmContext the RM context
*/
public FileBasedCSConfigurationProvider(RMContext rmContext) {
this.rmContext = rmContext;
}
@Override
public void init(Configuration conf) {}
@Override
public CapacitySchedulerConfiguration loadConfiguration(Configuration conf)
throws IOException {
try {
InputStream csInputStream =
this.rmContext.getConfigurationProvider()
.getConfigurationInputStream(conf,
YarnConfiguration.CS_CONFIGURATION_FILE);
if (csInputStream != null) {
conf.addResource(csInputStream);
return new CapacitySchedulerConfiguration(conf, false);
}
return new CapacitySchedulerConfiguration(conf, true);
} catch (Exception e) {
throw new IOException(e);
}
}
}
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