hadoop JobInfo 源码
haddop JobInfo 代码
文件路径：/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/JobInfo.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.mapred;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableUtils;
/**
* Represents the basic information that is saved per a job when the
* JobTracker receives a submitJob request. The information is saved
* so that the JobTracker can recover incomplete jobs upon restart.
*/
class JobInfo implements Writable {
private org.apache.hadoop.mapreduce.JobID id;
private Text user;
private Path jobSubmitDir;
public JobInfo() {}
public JobInfo(org.apache.hadoop.mapreduce.JobID id,
Text user,
Path jobSubmitDir) {
this.id = id;
this.user = user;
this.jobSubmitDir = jobSubmitDir;
}
/**
* Get the job id.
*/
public org.apache.hadoop.mapreduce.JobID getJobID() {
return id;
}
/**
* Get the configured job's user-name.
*/
public Text getUser() {
return user;
}
/**
* Get the job submission directory
*/
public Path getJobSubmitDir() {
return this.jobSubmitDir;
}
public void readFields(DataInput in) throws IOException {
id = new org.apache.hadoop.mapreduce.JobID();
id.readFields(in);
user = new Text();
user.readFields(in);
jobSubmitDir = new Path(WritableUtils.readString(in));
}
public void write(DataOutput out) throws IOException {
id.write(out);
user.write(out);
WritableUtils.writeString(out, jobSubmitDir.toString());
}
}
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