/*
* 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.beam.runners.direct;
/**
* Schedules and completes {@link TransformExecutor TransformExecutors}, controlling concurrency as
* appropriate for the {@link StepAndKey} the executor exists for.
*/
interface TransformExecutorService {
/**
* Schedule the provided work to be eventually executed.
*/
void schedule(TransformExecutor<?> work);
/**
* Finish executing the provided work. This may cause additional
* {@link TransformExecutor TransformExecutors} to be evaluated.
*/
void complete(TransformExecutor<?> completed);
/**
* Cancel any outstanding work, if possible. Any future calls to schedule should ignore any
* work.
*/
void shutdown();
}