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/**
* 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.io.Text;
import org.apache.hadoop.io.Writable;
/**
* Class that contains the information regarding the Job Queues which are
* maintained by the Hadoop Map/Reduce framework.
*
*/
public class JobQueueInfo implements Writable {
private String queueName = "";
//The scheduling Information object is read back as String.
//Once the scheduling information is set there is no way to recover it.
private String schedulingInfo;
/**
* Default constructor for Job Queue Info.
*
*/
public JobQueueInfo() {
}
/**
* Construct a new JobQueueInfo object using the queue name and the
* scheduling information passed.
*
* @param queueName Name of the job queue
* @param schedulingInfo Scheduling Information associated with the job
* queue
*/
public JobQueueInfo(String queueName, String schedulingInfo) {
this.queueName = queueName;
this.schedulingInfo = schedulingInfo;
}
/**
* Set the queue name of the JobQueueInfo
*
* @param queueName Name of the job queue.
*/
public void setQueueName(String queueName) {
this.queueName = queueName;
}
/**
* Get the queue name from JobQueueInfo
*
* @return queue name
*/
public String getQueueName() {
return queueName;
}
/**
* Set the scheduling information associated to particular job queue
*
* @param schedulingInfo
*/
public void setSchedulingInfo(String schedulingInfo) {
this.schedulingInfo = schedulingInfo;
}
/**
* Gets the scheduling information associated to particular job queue.
* If nothing is set would return "N/A"
*
* @return Scheduling information associated to particular Job Queue
*/
public String getSchedulingInfo() {
if(schedulingInfo != null) {
return schedulingInfo;
}else {
return "N/A";
}
}
@Override
public void readFields(DataInput in) throws IOException {
queueName = Text.readString(in);
schedulingInfo = Text.readString(in);
}
@Override
public void write(DataOutput out) throws IOException {
Text.writeString(out, queueName);
if(schedulingInfo!= null) {
Text.writeString(out, schedulingInfo);
}else {
Text.writeString(out, "N/A");
}
}
}