001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.reef.driver.evaluator; 020 021import org.apache.reef.annotations.Provided; 022import org.apache.reef.annotations.audience.DriverSide; 023import org.apache.reef.annotations.audience.Public; 024import org.apache.reef.driver.context.FailedContext; 025import org.apache.reef.driver.task.FailedTask; 026import org.apache.reef.exception.EvaluatorException; 027import org.apache.reef.io.naming.Identifiable; 028import org.apache.reef.util.Optional; 029 030import java.util.List; 031 032/** 033 * Represents an Evaluator that became unavailable. 034 */ 035@DriverSide 036@Public 037@Provided 038public interface FailedEvaluator extends Identifiable { 039 040 /** 041 * @return the reason for the failure. 042 */ 043 EvaluatorException getEvaluatorException(); 044 045 /** 046 * @return the list of all context that failed due to the evaluator failure. 047 */ 048 List<FailedContext> getFailedContextList(); 049 050 /** 051 * @return the failed task, if there was one running at the time of the evaluator failure. 052 */ 053 Optional<FailedTask> getFailedTask(); 054 055}