| /* |
| * 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.wayang.core.platform; |
| |
| import org.apache.wayang.core.api.Job; |
| import org.apache.wayang.core.optimizer.OptimizationContext; |
| import org.apache.wayang.core.plan.executionplan.ExecutionStage; |
| import org.apache.wayang.core.plan.wayangplan.ExecutionOperator; |
| |
| /** |
| * An executor executes {@link ExecutionOperator}s. |
| */ |
| public interface Executor extends CompositeExecutionResource { |
| |
| /** |
| * Executes the given {@code stage}. |
| * |
| * @param stage should be executed; must be executable by this instance, though |
| * @param optimizationContext |
| *@param executionState provides and accepts execution-related objects @return collected metadata from instrumentation |
| */ |
| void execute(ExecutionStage stage, OptimizationContext optimizationContext, ExecutionState executionState); |
| |
| /** |
| * Releases any instances acquired by this instance to execute {@link ExecutionStage}s. |
| */ |
| void dispose(); |
| |
| /** |
| * @return the {@link Platform} this instance belongs to |
| */ |
| Platform getPlatform(); |
| |
| /** |
| * If this instance is instrumented by a {@link CrossPlatformExecutor}, this method provides the latter. |
| * |
| * @return the instrumenting {@link CrossPlatformExecutor} or {@code null} if none |
| */ |
| CrossPlatformExecutor getCrossPlatformExecutor(); |
| |
| /** |
| * Factory for {@link Executor}s. |
| */ |
| interface Factory { |
| |
| /** |
| * @return a new {@link Executor} |
| */ |
| Executor create(Job job); |
| |
| } |
| |
| } |