/*
* 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.facebook.presto.execution.scheduler;
import java.io.Closeable;
public interface StageScheduler
extends Closeable
{
/**
* Schedules as much work as possible without blocking.
* The schedule results is a hint to the query scheduler if and
* when the stage scheduler should be invoked again. It is
* important to note that this is only a hint and the query
* scheduler may call the schedule method at any time.
*/
ScheduleResult schedule();
@Override
default void close() {}
}