hadoop JobProperties 源码

haddop JobProperties 代码

文件路径：/hadoop-tools/hadoop-rumen/src/main/java/org/apache/hadoop/tools/rumen/datatypes/JobProperties.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.tools.rumen.datatypes;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Properties;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.tools.rumen.datatypes.util.JobPropertyParser;
import org.apache.hadoop.tools.rumen.datatypes.util.MapReduceJobPropertiesParser;
import org.apache.hadoop.tools.rumen.state.StatePool;
import org.apache.hadoop.util.ReflectionUtils;

/**
 * This represents the job configuration properties.
 */
public class JobProperties implements AnonymizableDataType<Properties> {
  public static final String PARSERS_CONFIG_KEY = 
    "rumen.datatypes.jobproperties.parsers";
  private final Properties jobProperties;
  
  public JobProperties() {
    this(new Properties());
  }
  
  public JobProperties(Properties properties) {
    this.jobProperties = properties;
  }
  
  public Properties getValue() {
    return jobProperties;
  }
  
  @Override
  public Properties getAnonymizedValue(StatePool statePool, 
                                       Configuration conf) {
    Properties filteredProperties = null;
    List<JobPropertyParser> pList = new ArrayList<JobPropertyParser>(1);
    // load the parsers
    String config = conf.get(PARSERS_CONFIG_KEY);
    if (config != null) {
      @SuppressWarnings("unchecked")
      Class<JobPropertyParser>[] parsers = 
        (Class[])conf.getClasses(PARSERS_CONFIG_KEY);
      for (Class<JobPropertyParser> c : parsers) {
        JobPropertyParser parser = ReflectionUtils.newInstance(c, conf);
        pList.add(parser);
      }
    } else {
      // add the default MapReduce filter
      JobPropertyParser parser = new MapReduceJobPropertiesParser();
      pList.add(parser);
    }
    
    // filter out the desired config key-value pairs
    if (jobProperties != null) {
      filteredProperties = new Properties();
      // define a configuration object and load it with original job properties
      for (Map.Entry<Object, Object> entry : jobProperties.entrySet()) {
        //TODO Check for null key/value?
        String key = entry.getKey().toString();
        String value = entry.getValue().toString(); 
        
        // find a parser for this key
        for (JobPropertyParser p : pList) {
          DataType<?> pValue = p.parseJobProperty(key, value);
          if (pValue != null) {
            filteredProperties.put(key, pValue);
            break;
          }
        }
      }
    }
    return filteredProperties;
  }
}

相关信息

hadoop 源码目录

相关文章

hadoop AnonymizableDataType 源码

hadoop ClassName 源码

hadoop DataType 源码

hadoop DefaultAnonymizableDataType 源码

hadoop DefaultDataType 源码

hadoop FileName 源码

hadoop JobName 源码

hadoop NodeName 源码

hadoop QueueName 源码

hadoop UserName 源码