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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.statement;
22  
23  import org.apache.hadoop.hbase.hbql.client.ExecutionResults;
24  import org.apache.hadoop.hbase.hbql.client.HBqlException;
25  import org.apache.hadoop.hbase.hbql.client.QueryExecutorPool;
26  import org.apache.hadoop.hbase.hbql.client.QueryExecutorPoolManager;
27  import org.apache.hadoop.hbase.hbql.impl.HConnectionImpl;
28  
29  public class ShowQueryExecutorPoolsStatement extends GenericStatement implements ConnectionStatement {
30  
31      public ShowQueryExecutorPoolsStatement() {
32          super(null);
33      }
34  
35      protected ExecutionResults execute(final HConnectionImpl conn) throws HBqlException {
36  
37          final ExecutionResults retval = new ExecutionResults();
38          retval.out.println("Query Executor Pools: ");
39          for (final String name : QueryExecutorPoolManager.getQueryExecutorPoolNames()) {
40              final QueryExecutorPool executorPool = QueryExecutorPoolManager.getQueryExecutorPool(name);
41              retval.out.println("\t" + executorPool.getName() + "(" +
42                                 "MAX_EXECUTOR_POOL_SIZE: " + executorPool.getMaxPoolSize()
43                                 + ", MIN_THREAD_COUNT: " + executorPool.getMinThreadCount()
44                                 + ", MAX_THREAD_COUNT: " + executorPool.getMaxThreadCount()
45                                 + ", KEEP_ALIVE_SECS: " + executorPool.getKeepAliveSecs()
46                                 + ", THREADS_READ_RESULTS: " + executorPool.getThreadsReadResults()
47                                 + ", COMPLETION_QUEUE_SIZE: " + executorPool.getCompletionQueueSize()
48                                 + ")");
49          }
50          retval.out.flush();
51          return retval;
52      }
53  
54      public static String usage() {
55          return "SHOW QUERY EXECUTOR POOLS";
56      }
57  }