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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.QueryExecutorPoolManager;
26  import org.apache.hadoop.hbase.hbql.executor.QueryExecutorPoolDefinition;
27  import org.apache.hadoop.hbase.hbql.impl.HConnectionImpl;
28  
29  public class CreateQueryExecutorPoolStatement extends GenericStatement implements ConnectionStatement {
30  
31      private final QueryExecutorPoolDefinition args;
32  
33      public CreateQueryExecutorPoolStatement(final StatementPredicate predicate,
34                                              final QueryExecutorPoolDefinition args) {
35          super(predicate);
36          this.args = args;
37      }
38  
39      private QueryExecutorPoolDefinition getArgs() {
40          return this.args;
41      }
42  
43      protected ExecutionResults execute(final HConnectionImpl conn) throws HBqlException {
44  
45          this.getArgs().validateExecutorPoolPropertyList();
46  
47          QueryExecutorPoolManager.newQueryExecutorPool(this.getArgs().getPoolName(),
48                                                        this.getArgs().getMaxExecutorPoolSize(),
49                                                        this.getArgs().getMinThreadCount(),
50                                                        this.getArgs().getMaxThreadCount(),
51                                                        this.getArgs().getKeepAliveSecs(),
52                                                        this.getArgs().getThreadsReadResults(),
53                                                        this.getArgs().getCompletionQueueSize());
54  
55          return new ExecutionResults("Query executor pool " + this.getArgs().getPoolName() + " created.");
56      }
57  
58  
59      public static String usage() {
60          return "CREATE QUERY EXECUTOR POOL pool_name (MAX_EXECUTOR_POOL_SIZE: int_expr, MIN_THREAD_COUNT: int_expr, MAX_THREAD_COUNT: int_expr, THREADS_READ_RESULTS: bool_expr, COMPLETION_QUEUE_SIZE: int_expr) [IF bool_expr]";
61      }
62  }