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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.AsyncExecutor;
24  import org.apache.hadoop.hbase.hbql.client.AsyncExecutorManager;
25  import org.apache.hadoop.hbase.hbql.client.ExecutionResults;
26  import org.apache.hadoop.hbase.hbql.client.HBqlException;
27  import org.apache.hadoop.hbase.hbql.impl.HConnectionImpl;
28  
29  public class ShowAsyncExecutorsStatement extends GenericStatement implements ConnectionStatement {
30  
31      public ShowAsyncExecutorsStatement() {
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("Async Executors: ");
39          for (final String name : AsyncExecutorManager.getAsyncExecutorNames()) {
40              final AsyncExecutor asyncExecutor = AsyncExecutorManager.getAsyncExecutor(name);
41              retval.out.println("\t" + asyncExecutor.getName() + "("
42                                 + "MIN_THREAD_COUNT: " + asyncExecutor.getMinThreadCount()
43                                 + ", MAX_THREAD_COUNT: " + asyncExecutor.getMaxThreadCount()
44                                 + ", KEEP_ALIVE_SECS: " + asyncExecutor.getKeepAliveSecs()
45                                 + ")");
46          }
47          retval.out.flush();
48          return retval;
49      }
50  
51      public static String usage() {
52          return "SHOW ASYNC EXECUTORS";
53      }
54  }