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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to you under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    * http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.hadoop.hbase.quotas;
18  
19  import java.io.IOException;
20  
21  import org.apache.commons.logging.Log;
22  import org.apache.commons.logging.LogFactory;
23  import org.apache.hadoop.hbase.TableName;
24  import org.apache.hadoop.hbase.client.Connection;
25  import org.apache.hadoop.hbase.client.Put;
26  import org.apache.hadoop.hbase.client.Table;
27  
28  /**
29   * A {@link SpaceQuotaSnapshotNotifier} which uses the hbase:quota table.
30   */
31  public class TableSpaceQuotaSnapshotNotifier implements SpaceQuotaSnapshotNotifier {
32    private static final Log LOG = LogFactory.getLog(TableSpaceQuotaSnapshotNotifier.class);
33  
34    private Connection conn;
35  
36    @Override
37    public void transitionTable(
38        TableName tableName, SpaceQuotaSnapshot snapshot) throws IOException {
39      final Put p = QuotaTableUtil.putSpaceSnapshot(tableName, snapshot);
40      try (Table quotaTable = conn.getTable(QuotaTableUtil.QUOTA_TABLE_NAME)) {
41        if (LOG.isTraceEnabled()) {
42          LOG.trace("Persisting a space quota snapshot " + snapshot + " for " + tableName);
43        }
44        quotaTable.put(p);
45      }
46    }
47  
48    @Override
49    public void initialize(Connection conn) {
50      this.conn = conn;
51    }
52  }