| /** |
| * 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.api.records; |
| |
| import org.apache.hadoop.classification.InterfaceAudience.Private; |
| import org.apache.hadoop.classification.InterfaceAudience.Public; |
| import org.apache.hadoop.classification.InterfaceStability.Stable; |
| import org.apache.hadoop.classification.InterfaceStability.Unstable; |
| import org.apache.hadoop.util.FastNumberFormat; |
| import org.apache.hadoop.yarn.util.Records; |
| |
| /** |
| * <p><code>ApplicationAttemptId</code> denotes the particular <em>attempt</em> |
| * of an <code>ApplicationMaster</code> for a given {@link ApplicationId}.</p> |
| * |
| * <p>Multiple attempts might be needed to run an application to completion due |
| * to temporal failures of the <code>ApplicationMaster</code> such as hardware |
| * failures, connectivity issues etc. on the node on which it was scheduled.</p> |
| */ |
| @Public |
| @Stable |
| public abstract class ApplicationAttemptId implements |
| Comparable<ApplicationAttemptId> { |
| |
| @Private |
| @Unstable |
| public static final String appAttemptIdStrPrefix = "appattempt"; |
| |
| private static final String APP_ATTEMPT_ID_PREFIX = appAttemptIdStrPrefix |
| + '_'; |
| |
| @Public |
| @Unstable |
| public static ApplicationAttemptId newInstance(ApplicationId appId, |
| int attemptId) { |
| ApplicationAttemptId appAttemptId = |
| Records.newRecord(ApplicationAttemptId.class); |
| appAttemptId.setApplicationId(appId); |
| appAttemptId.setAttemptId(attemptId); |
| appAttemptId.build(); |
| return appAttemptId; |
| } |
| |
| /** |
| * Get the <code>ApplicationId</code> of the <code>ApplicationAttempId</code>. |
| * @return <code>ApplicationId</code> of the <code>ApplicationAttempId</code> |
| */ |
| @Public |
| @Stable |
| public abstract ApplicationId getApplicationId(); |
| |
| @Private |
| @Unstable |
| protected abstract void setApplicationId(ApplicationId appID); |
| |
| /** |
| * Get the <code>attempt id</code> of the <code>Application</code>. |
| * @return <code>attempt id</code> of the <code>Application</code> |
| */ |
| @Public |
| @Stable |
| public abstract int getAttemptId(); |
| |
| @Private |
| @Unstable |
| protected abstract void setAttemptId(int attemptId); |
| |
| private static final int ATTEMPT_ID_MIN_DIGITS = 6; |
| private static final int APP_ID_MIN_DIGITS = 4; |
| |
| @Override |
| public int hashCode() { |
| // Generated by eclipse. |
| final int prime = 347671; |
| int result = 5501; |
| ApplicationId appId = getApplicationId(); |
| result = prime * result + appId.hashCode(); |
| result = prime * result + getAttemptId(); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) |
| return true; |
| if (obj == null) |
| return false; |
| if (getClass() != obj.getClass()) |
| return false; |
| ApplicationAttemptId other = (ApplicationAttemptId) obj; |
| if (!this.getApplicationId().equals(other.getApplicationId())) |
| return false; |
| if (this.getAttemptId() != other.getAttemptId()) |
| return false; |
| return true; |
| } |
| |
| @Override |
| public int compareTo(ApplicationAttemptId other) { |
| int compareAppIds = this.getApplicationId().compareTo( |
| other.getApplicationId()); |
| if (compareAppIds == 0) { |
| return this.getAttemptId() - other.getAttemptId(); |
| } else { |
| return compareAppIds; |
| } |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(64); |
| sb.append(APP_ATTEMPT_ID_PREFIX); |
| ApplicationId appId = getApplicationId(); |
| sb.append(appId.getClusterTimestamp()); |
| sb.append('_'); |
| FastNumberFormat.format(sb, appId.getId(), APP_ID_MIN_DIGITS); |
| sb.append('_'); |
| FastNumberFormat.format(sb, getAttemptId(), ATTEMPT_ID_MIN_DIGITS); |
| return sb.toString(); |
| } |
| |
| protected abstract void build(); |
| |
| @Public |
| @Stable |
| public static ApplicationAttemptId fromString(String appAttemptIdStr) { |
| if (!appAttemptIdStr.startsWith(APP_ATTEMPT_ID_PREFIX)) { |
| throw new IllegalArgumentException("Invalid AppAttemptId prefix: " |
| + appAttemptIdStr); |
| } |
| try { |
| int pos1 = APP_ATTEMPT_ID_PREFIX.length() - 1; |
| int pos2 = appAttemptIdStr.indexOf('_', pos1 + 1); |
| if (pos2 < 0) { |
| throw new IllegalArgumentException("Invalid AppAttemptId: " |
| + appAttemptIdStr); |
| } |
| long rmId = Long.parseLong(appAttemptIdStr.substring(pos1 + 1, pos2)); |
| int pos3 = appAttemptIdStr.indexOf('_', pos2 + 1); |
| if (pos3 < 0) { |
| throw new IllegalArgumentException("Invalid AppAttemptId: " |
| + appAttemptIdStr); |
| } |
| int appId = Integer.parseInt(appAttemptIdStr.substring(pos2 + 1, pos3)); |
| ApplicationId applicationId = ApplicationId.newInstance(rmId, appId); |
| int attemptId = Integer.parseInt(appAttemptIdStr.substring(pos3 + 1)); |
| ApplicationAttemptId applicationAttemptId = |
| ApplicationAttemptId.newInstance(applicationId, attemptId); |
| return applicationAttemptId; |
| } catch (NumberFormatException n) { |
| throw new IllegalArgumentException("Invalid AppAttemptId: " |
| + appAttemptIdStr, n); |
| } |
| } |
| } |