| /** |
| * 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.placement; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairSchedulerUtilities; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Utility methods used by Fair scheduler placement rules. |
| * {@link |
| * org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler} |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Unstable |
| public final class FairQueuePlacementUtils { |
| private static final Logger LOG = |
| LoggerFactory.getLogger(FairQueuePlacementUtils.class); |
| |
| // Constants for name clean up and hierarchy checks |
| protected static final String DOT = "."; |
| protected static final String DOT_REPLACEMENT = "_dot_"; |
| protected static final String ROOT_QUEUE = "root"; |
| |
| private FairQueuePlacementUtils() { |
| } |
| |
| /** |
| * Replace the periods in the username or group name with "_dot_" and |
| * remove trailing and leading whitespace. |
| * |
| * @param name The name to clean |
| * @return The name with {@link #DOT} replaced with {@link #DOT_REPLACEMENT} |
| */ |
| protected static String cleanName(String name) { |
| name = FairSchedulerUtilities.trimQueueName(name); |
| if (name.contains(DOT)) { |
| String converted = name.replaceAll("\\.", DOT_REPLACEMENT); |
| LOG.warn("Name {} is converted to {} when it is used as a queue name.", |
| name, converted); |
| return converted; |
| } else { |
| return name; |
| } |
| } |
| |
| /** |
| * Assure root prefix for a queue name. |
| * |
| * @param queueName The queue name to check for the root prefix |
| * @return The root prefixed queue name |
| */ |
| protected static String assureRoot(String queueName) { |
| if (queueName != null && !queueName.isEmpty()) { |
| if (!queueName.startsWith(ROOT_QUEUE + DOT) && |
| !queueName.equals(ROOT_QUEUE)) { |
| queueName = ROOT_QUEUE + DOT + queueName; |
| } |
| } else { |
| LOG.warn("AssureRoot: queueName is empty or null."); |
| } |
| return queueName; |
| } |
| |
| /** |
| * Validate the queue name: it may not start or end with a {@link #DOT}. |
| * |
| * @param queueName The queue name to validate |
| * @return <code>false</code> if the queue name starts or ends with a |
| * {@link #DOT}, <code>true</code> |
| */ |
| protected static boolean isValidQueueName(String queueName) { |
| if (queueName != null) { |
| if (queueName.equals(FairSchedulerUtilities.trimQueueName(queueName)) && |
| !queueName.startsWith(DOT) && |
| !queueName.endsWith(DOT)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| } |