View Javadoc

1   /*
2    * Copyright (c) 2010.  The Apache Software Foundation
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *     http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing, software
15   * distributed under the License is distributed on an "AS IS" BASIS,
16   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17   * See the License for the specific language governing permissions and
18   * limitations under the License.
19   */
20  
21  package org.apache.hadoop.hbase.hbql.impl;
22  
23  import org.apache.hadoop.hbase.HBaseConfiguration;
24  import org.apache.hadoop.hbase.hbql.client.HBqlException;
25  import org.apache.hadoop.hbase.hbql.client.HConnection;
26  import org.apache.hadoop.hbase.hbql.client.HConnectionPool;
27  
28  public class HConnectionPoolImpl extends ElementPool<HConnectionImpl> implements HConnectionPool {
29  
30      private final HBaseConfiguration hbaseConfiguration;
31      private final int maxReferencesPerTable;
32  
33      public HConnectionPoolImpl(final int initPoolSize,
34                                 final int maxPoolSize,
35                                 final String poolName,
36                                 final HBaseConfiguration hbaseConfiguration,
37                                 final int maxPoolReferencesPerTablePerConnection) throws HBqlException {
38          super(poolName, maxPoolSize);
39  
40          this.hbaseConfiguration = (hbaseConfiguration == null) ? new HBaseConfiguration() : hbaseConfiguration;
41          this.maxReferencesPerTable = maxPoolReferencesPerTablePerConnection;
42  
43          for (int i = 0; i < initPoolSize; i++)
44              this.addElementToPool();
45      }
46  
47      public HBaseConfiguration getHBaseConfiguration() {
48          return this.hbaseConfiguration;
49      }
50  
51      public int getMaxReferencesPerTable() {
52          return this.maxReferencesPerTable;
53      }
54  
55      protected HConnectionImpl newElement() throws HBqlException {
56          return new HConnectionImpl(this.getHBaseConfiguration(), this, this.getMaxReferencesPerTable());
57      }
58  
59      public HConnection takeConnection() throws HBqlException {
60          return this.take();
61      }
62  }