001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to you under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.hadoop.hbase.quotas;
018
019import java.io.IOException;
020import java.util.Optional;
021
022import org.apache.hadoop.conf.Configuration;
023import org.apache.hadoop.hbase.CoprocessorEnvironment;
024import org.apache.hadoop.hbase.TableName;
025import org.apache.hadoop.hbase.client.Admin;
026import org.apache.hadoop.hbase.client.Connection;
027import org.apache.hadoop.hbase.coprocessor.CoprocessorException;
028import org.apache.hadoop.hbase.coprocessor.CoreCoprocessor;
029import org.apache.hadoop.hbase.coprocessor.HasMasterServices;
030import org.apache.hadoop.hbase.coprocessor.MasterCoprocessor;
031import org.apache.hadoop.hbase.coprocessor.MasterCoprocessorEnvironment;
032import org.apache.hadoop.hbase.coprocessor.MasterObserver;
033import org.apache.hadoop.hbase.coprocessor.ObserverContext;
034import org.apache.hadoop.hbase.master.MasterServices;
035import org.apache.yetus.audience.InterfaceAudience;
036import org.apache.hadoop.hbase.shaded.protobuf.generated.QuotaProtos.Quotas;
037
038/**
039 * An observer to automatically delete quotas when a table/namespace
040 * is deleted.
041 */
042@CoreCoprocessor
043@InterfaceAudience.Private
044public class MasterQuotasObserver implements MasterCoprocessor, MasterObserver {
045  public static final String REMOVE_QUOTA_ON_TABLE_DELETE = "hbase.quota.remove.on.table.delete";
046  public static final boolean REMOVE_QUOTA_ON_TABLE_DELETE_DEFAULT = true;
047
048  private CoprocessorEnvironment cpEnv;
049  private Configuration conf;
050  private boolean quotasEnabled = false;
051  private MasterServices masterServices;
052
053  @Override
054  public Optional<MasterObserver> getMasterObserver() {
055    return Optional.of(this);
056  }
057
058  @Override
059  public void start(CoprocessorEnvironment ctx) throws IOException {
060    this.conf = ctx.getConfiguration();
061    this.quotasEnabled = QuotaUtil.isQuotaEnabled(conf);
062
063    if (!(ctx instanceof MasterCoprocessorEnvironment)) {
064      throw new CoprocessorException("Must be loaded on master.");
065    }
066    // if running on master
067    MasterCoprocessorEnvironment mEnv = (MasterCoprocessorEnvironment) ctx;
068    if (mEnv instanceof HasMasterServices) {
069      this.masterServices = ((HasMasterServices) mEnv).getMasterServices();
070    } else {
071      throw new CoprocessorException("Must be loaded on a master having master services.");
072    }
073  }
074
075  @Override
076  public void postDeleteTable(
077      ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName) throws IOException {
078    // Do nothing if quotas aren't enabled
079    if (!quotasEnabled) {
080      return;
081    }
082    final Connection conn = ctx.getEnvironment().getConnection();
083    Quotas tableQuotas = QuotaUtil.getTableQuota(conn, tableName);
084    Quotas namespaceQuotas = QuotaUtil.getNamespaceQuota(conn, tableName.getNamespaceAsString());
085    if (tableQuotas != null || namespaceQuotas != null) {
086      // Remove regions of table from space quota map.
087      this.masterServices.getMasterQuotaManager().removeRegionSizesForTable(tableName);
088      if (tableQuotas != null) {
089        if (tableQuotas.hasSpace()) {
090          QuotaSettings settings = QuotaSettingsFactory.removeTableSpaceLimit(tableName);
091          try (Admin admin = conn.getAdmin()) {
092            admin.setQuota(settings);
093          }
094        }
095        if (tableQuotas.hasThrottle()) {
096          QuotaSettings settings = QuotaSettingsFactory.unthrottleTable(tableName);
097          try (Admin admin = conn.getAdmin()) {
098            admin.setQuota(settings);
099          }
100        }
101      }
102    }
103  }
104
105  @Override
106  public void postDeleteNamespace(
107      ObserverContext<MasterCoprocessorEnvironment> ctx, String namespace) throws IOException {
108    // Do nothing if quotas aren't enabled
109    if (!quotasEnabled) {
110      return;
111    }
112    final Connection conn = ctx.getEnvironment().getConnection();
113    Quotas quotas = QuotaUtil.getNamespaceQuota(conn, namespace);
114    if (quotas != null) {
115      if (quotas.hasSpace()) {
116        QuotaSettings settings = QuotaSettingsFactory.removeNamespaceSpaceLimit(namespace);
117        try (Admin admin = conn.getAdmin()) {
118          admin.setQuota(settings);
119        }
120      }
121      if (quotas.hasThrottle()) {
122        QuotaSettings settings = QuotaSettingsFactory.unthrottleNamespace(namespace);
123        try (Admin admin = conn.getAdmin()) {
124          admin.setQuota(settings);
125        }
126      }
127    }
128  }
129}