| /* |
| * 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.optimizer.OptimizationContext; |
| import org.apache.wayang.core.plan.executionplan.ExecutionPlan; |
| import org.apache.wayang.core.plan.executionplan.ExecutionStage; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * Describes when to interrupt the execution of an {@link ExecutionPlan}. |
| */ |
| public class FixBreakpoint implements Breakpoint { |
| |
| /** |
| * {@link ExecutionStage}s that should not yet be executed. |
| */ |
| private final Set<ExecutionStage> stagesToSuspend = new HashSet<>(); |
| |
| public FixBreakpoint breakAfter(ExecutionStage stage) { |
| return this.breakBefore(stage.getSuccessors()); |
| } |
| |
| public FixBreakpoint breakBefore(ExecutionStage stage) { |
| return this.breakBefore(Collections.singleton(stage)); |
| } |
| |
| public FixBreakpoint breakBefore(Collection<ExecutionStage> stages) { |
| for (ExecutionStage stage : stages) { |
| if (this.stagesToSuspend.add(stage)) { |
| this.breakBefore(stage.getSuccessors()); |
| } |
| } |
| return this; |
| } |
| |
| @Override |
| public boolean permitsExecutionOf(ExecutionStage stage, |
| ExecutionState state, |
| OptimizationContext optimizationContext) { |
| return !this.stagesToSuspend.contains(stage); |
| } |
| |
| } |