| /* |
| * 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.nemo.compiler.optimizer.policy; |
| |
| import org.apache.nemo.common.ir.IRDAG; |
| import org.apache.nemo.compiler.optimizer.pass.runtime.Message; |
| |
| import java.io.Serializable; |
| |
| /** |
| * An interface for policies, each of which is composed of a list of static optimization passes. |
| * The list of static optimization passes are run in the order provided by the implementation. |
| * Most policies follow the implementation in {@link PolicyImpl}. |
| */ |
| public interface Policy extends Serializable { |
| /** |
| * Optimize the DAG with the compile-time optimizations. |
| * |
| * @param dag input DAG. |
| * @param dagDirectory directory to save the DAG information. |
| * @return optimized DAG, reshaped or tagged with execution properties. |
| */ |
| IRDAG runCompileTimeOptimization(IRDAG dag, String dagDirectory); |
| |
| /** |
| * Optimize the DAG with the run-time optimizations. |
| * |
| * @param dag input DAG. |
| * @param message from the DAG execution. |
| * @return optimized DAG, reshaped or tagged with execution properties. |
| */ |
| IRDAG runRunTimeOptimizations(IRDAG dag, Message<?> message); |
| } |