| /** |
| * 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.hadoop.yarn.server.resourcemanager; |
| |
| import org.apache.hadoop.util.StringUtils; |
| import org.apache.hadoop.yarn.event.AbstractEvent; |
| |
| /** |
| * Event that indicates a non-recoverable error for the resource manager. |
| */ |
| public class RMFatalEvent extends AbstractEvent<RMFatalEventType> { |
| private final Exception cause; |
| private final String message; |
| |
| /** |
| * Create a new event of the given type with the given cause. |
| * @param rmFatalEventType The {@link RMFatalEventType} of the event |
| * @param message a text description of the reason for the event |
| */ |
| public RMFatalEvent(RMFatalEventType rmFatalEventType, String message) { |
| this(rmFatalEventType, null, message); |
| } |
| |
| /** |
| * Create a new event of the given type around the given source |
| * {@link Exception}. |
| * @param rmFatalEventType The {@link RMFatalEventType} of the event |
| * @param cause the source exception |
| */ |
| public RMFatalEvent(RMFatalEventType rmFatalEventType, Exception cause) { |
| this(rmFatalEventType, cause, null); |
| } |
| |
| /** |
| * Create a new event of the given type around the given source |
| * {@link Exception} with the given cause. |
| * @param rmFatalEventType The {@link RMFatalEventType} of the event |
| * @param cause the source exception |
| * @param message a text description of the reason for the event |
| */ |
| public RMFatalEvent(RMFatalEventType rmFatalEventType, Exception cause, |
| String message) { |
| super(rmFatalEventType); |
| this.cause = cause; |
| this.message = message; |
| } |
| |
| /** |
| * Get a text description of the reason for the event. If a cause was, that |
| * {@link Exception} will be converted to a {@link String} and included in |
| * the result. |
| * @return a text description of the reason for the event |
| */ |
| public String getExplanation() { |
| StringBuilder sb = new StringBuilder(); |
| |
| if (message != null) { |
| sb.append(message); |
| |
| if (cause != null) { |
| sb.append(": "); |
| } |
| } |
| |
| if (cause != null) { |
| sb.append(StringUtils.stringifyException(cause)); |
| } |
| |
| return sb.toString(); |
| } |
| |
| @Override |
| public String toString() { |
| return String.format("RMFatalEvent of type %s, caused by %s", |
| getType().name(), getExplanation()); |
| } |
| } |