com.netflix.fenzo.queues.QAttributes Maven / Gradle / Ivy
/*
* Copyright 2016 Netflix, Inc.
*
* Licensed 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 com.netflix.fenzo.queues;
/**
* Attributes for a queue. A queue is comprised of attributes: a bucket name and a tier number. Generally, queues are
* placed into one or more tiers, each of which have one or more buckets. The tiers and buckets can be associated with
* some aspects of scheduling, such as for capacity guarantees. However, queue implementations are free to interpret
* tier and bucket to suit their needs.
*/
public interface QAttributes {
/**
* Get the queue's bucket name.
* @return Name of the queue's bucket.
*/
String getBucketName();
/**
* Get the tier number for the queue. Queues belong to a tier represented by a number. In general, lower numbers
* are ahead in the order of tiers.
* @return The tier number for the corresponding queue.
*/
int getTierNumber();
/**
* A convenience class for creating {@link QAttributes} instances.
*/
class QAttributesAdaptor implements QAttributes {
private final int tierNumber;
private final String bucketName;
public QAttributesAdaptor(int tierNumber, String bucketName) {
this.bucketName = bucketName;
this.tierNumber = tierNumber;
}
@Override
public String getBucketName() {
return bucketName;
}
@Override
public int getTierNumber() {
return tierNumber;
}
}
/**
* A convenience class to represent the tuple of task id and {@link QAttributes}.
*/
class TaskIdAttributesTuple {
private final String id;
private final QAttributes qAttributes;
public TaskIdAttributesTuple(String id, QAttributes qAttributes) {
this.id = id;
this.qAttributes = qAttributes;
}
public String getId() {
return id;
}
public QAttributes getqAttributes() {
return qAttributes;
}
}
}