/*
* 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.tajo.master;
/**
* FragmentScheduleAlgorithm is used by LazyTaskScheduler.
* FragmentScheduleAlgorithm selects a fragment for the given argument.
*
* There are two implementations of DefaultFragmentScheduleAlgorithm and GreedyFragmentScheduleAlgorithm.
*/
public interface FragmentScheduleAlgorithm {
void addFragment(FragmentPair fragmentPair);
void removeFragment(FragmentPair fragmentPair);
FragmentPair getHostLocalFragment(String host);
FragmentPair getHostLocalFragment(String host, Integer diskId);
FragmentPair getRackLocalFragment(String host);
FragmentPair getRandomFragment();
FragmentPair[] getAllFragments();
int size();
}