View Javadoc

1   /*
2    * Copyright (c) 2011.  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.conf.Configuration;
24  import org.apache.hadoop.hbase.HBaseConfiguration;
25  import org.apache.hadoop.hbase.hbql.client.HBqlException;
26  import org.apache.hadoop.hbase.hbql.client.HConnection;
27  import org.apache.hadoop.hbase.hbql.client.HConnectionPool;
28  
29  public class HConnectionPoolImpl extends ElementPool<HConnectionImpl> implements HConnectionPool {
30  
31      private final Configuration configuration;
32      private final int           maxReferencesPerTable;
33  
34      public HConnectionPoolImpl(final int initPoolSize,
35                                 final int maxPoolSize,
36                                 final String poolName,
37                                 final Configuration configuration,
38                                 final int maxPoolReferencesPerTablePerConnection) throws HBqlException {
39          super(poolName, maxPoolSize);
40  
41          this.configuration = (configuration == null) ? HBaseConfiguration.create() : configuration;
42          this.maxReferencesPerTable = maxPoolReferencesPerTablePerConnection;
43  
44          for (int i = 0; i < initPoolSize; i++)
45              this.addElementToPool();
46      }
47  
48      public Configuration getConfiguration() {
49          return this.configuration;
50      }
51  
52      public int getMaxReferencesPerTable() {
53          return this.maxReferencesPerTable;
54      }
55  
56      protected HConnectionImpl newElement() throws HBqlException {
57          return new HConnectionImpl(this.getConfiguration(), this, this.getMaxReferencesPerTable());
58      }
59  
60      public HConnection takeConnection() throws HBqlException {
61          return this.take();
62      }
63  }