| /** |
| * 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 java.text.NumberFormat; |
| |
| 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; |
| |
| /** |
| * <p><code>ContainerId</code> represents a globally unique identifier |
| * for a {@link Container} in the cluster.</p> |
| */ |
| @Public |
| @Stable |
| public abstract class ContainerId implements Comparable<ContainerId>{ |
| /** |
| * Get the <code>ApplicationAttemptId</code> of the application to which |
| * the <code>Container</code> was assigned. |
| * @return <code>ApplicationAttemptId</code> of the application to which |
| * the <code>Container</code> was assigned |
| */ |
| @Public |
| @Stable |
| public abstract ApplicationAttemptId getApplicationAttemptId(); |
| |
| @Private |
| @Unstable |
| public abstract void setApplicationAttemptId(ApplicationAttemptId atId); |
| |
| /** |
| * Get the identifier of the <code>ContainerId</code>. |
| * @return identifier of the <code>ContainerId</code> |
| */ |
| @Public |
| @Stable |
| public abstract int getId(); |
| |
| @Private |
| @Unstable |
| public abstract void setId(int id); |
| |
| |
| // TODO: fail the app submission if attempts are more than 10 or something |
| private static final ThreadLocal<NumberFormat> appAttemptIdFormat = |
| new ThreadLocal<NumberFormat>() { |
| @Override |
| public NumberFormat initialValue() { |
| NumberFormat fmt = NumberFormat.getInstance(); |
| fmt.setGroupingUsed(false); |
| fmt.setMinimumIntegerDigits(2); |
| return fmt; |
| } |
| }; |
| // TODO: Why thread local? |
| // ^ NumberFormat instances are not threadsafe |
| private static final ThreadLocal<NumberFormat> containerIdFormat = |
| new ThreadLocal<NumberFormat>() { |
| @Override |
| public NumberFormat initialValue() { |
| NumberFormat fmt = NumberFormat.getInstance(); |
| fmt.setGroupingUsed(false); |
| fmt.setMinimumIntegerDigits(6); |
| return fmt; |
| } |
| }; |
| |
| @Override |
| public int hashCode() { |
| // Generated by eclipse. |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + getId(); |
| result = prime * result + getApplicationAttemptId().hashCode(); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) |
| return true; |
| if (obj == null) |
| return false; |
| if (getClass() != obj.getClass()) |
| return false; |
| ContainerId other = (ContainerId) obj; |
| if (!this.getApplicationAttemptId().equals(other.getApplicationAttemptId())) |
| return false; |
| if (this.getId() != other.getId()) |
| return false; |
| return true; |
| } |
| |
| @Override |
| public int compareTo(ContainerId other) { |
| if (this.getApplicationAttemptId().compareTo( |
| other.getApplicationAttemptId()) == 0) { |
| return this.getId() - other.getId(); |
| } else { |
| return this.getApplicationAttemptId().compareTo( |
| other.getApplicationAttemptId()); |
| } |
| |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("container_"); |
| ApplicationId appId = getApplicationAttemptId().getApplicationId(); |
| sb.append(appId.getClusterTimestamp()).append("_"); |
| sb.append(ApplicationId.appIdFormat.get().format(appId.getId())) |
| .append("_"); |
| sb.append( |
| appAttemptIdFormat.get().format( |
| getApplicationAttemptId().getAttemptId())).append("_"); |
| sb.append(containerIdFormat.get().format(getId())); |
| return sb.toString(); |
| } |
| } |