| /** |
| * 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.hdfs.server.namenode; |
| |
| import org.apache.hadoop.hdfs.util.EnumCounters; |
| |
| /** Quota types. */ |
| public enum Quota { |
| /** The namespace usage, i.e. the number of name objects. */ |
| NAMESPACE, |
| /** The storage space usage in bytes including replication. */ |
| STORAGESPACE; |
| |
| /** Counters for quota counts. */ |
| public static class Counts extends EnumCounters<Quota> { |
| /** @return a new counter with the given namespace and storagespace usages. */ |
| public static Counts newInstance(long namespace, long storagespace) { |
| final Counts c = new Counts(); |
| c.set(NAMESPACE, namespace); |
| c.set(STORAGESPACE, storagespace); |
| return c; |
| } |
| |
| public static Counts newInstance() { |
| return newInstance(0, 0); |
| } |
| |
| Counts() { |
| super(Quota.class); |
| } |
| } |
| |
| /** |
| * Is quota violated? |
| * The quota is violated if quota is set and usage > quota. |
| */ |
| public static boolean isViolated(final long quota, final long usage) { |
| return quota >= 0 && usage > quota; |
| } |
| |
| /** |
| * Is quota violated? |
| * The quota is violated if quota is set, delta > 0 and usage + delta > quota. |
| */ |
| static boolean isViolated(final long quota, final long usage, |
| final long delta) { |
| return quota >= 0 && delta > 0 && usage > quota - delta; |
| } |
| } |