GetPreparedStatementMetadata


1   /**
2    * Sequoia: Database clustering technology.
3    * Copyright (C) 2006 Continuent, Inc.
4    * Contact: sequoia@continuent.org
5    * 
6    * Licensed under the Apache License, Version 2.0 (the "License");
7    * you may not use this file except in compliance with the License.
8    * You may obtain a copy of the License at
9    * 
10   * http://www.apache.org/licenses/LICENSE-2.0
11   * 
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License. 
17   *
18   * Initial developer(s): Damian Arregui.
19   * Contributor(s): ______________________.
20   */
21  
22  package org.continuent.sequoia.controller.virtualdatabase.protocol;
23  
24  import java.io.Serializable  ;
25  import java.sql.SQLException  ;
26  
27  import org.continuent.hedera.common.Member;
28  import org.continuent.sequoia.common.exceptions.ControllerException;
29  import org.continuent.sequoia.controller.requests.AbstractRequest;
30  import org.continuent.sequoia.controller.virtualdatabase.DistributedVirtualDatabase;
31  
32  /**
33   * This class defines a GetPreparedStatementMetadata
34   * 
35   * @author <a HREF="mailto:damian.arregui@continuent.com">Damian Arregui</a>
36   * @version 1.0
37   */
38  public class GetPreparedStatementMetadata
39      extends DistributedVirtualDatabaseMessage
40  {
41    private static final long serialVersionUID = 4898077898219570560L;
42  
43    private AbstractRequest   request;
44  
45    /**
46     * Creates a new <code>GetPreparedStatementMetadata</code> object
47     * 
48     * @param request the request containig the statement to get metadata for.
49     */
50    public GetPreparedStatementMetadata(AbstractRequest request)
51    {
52      this.request = request;
53    }
54  
55    /**
56     * @see org.continuent.sequoia.controller.virtualdatabase.protocol.DistributedVirtualDatabaseMessage#handleMessageSingleThreaded(org.continuent.sequoia.controller.virtualdatabase.DistributedVirtualDatabase,
57     *      org.continuent.hedera.common.Member)
58     */
59    public Object   handleMessageSingleThreaded(DistributedVirtualDatabase dvdb,
60        Member sender)
61    {
62      try
63      {
64        return dvdb.getRequestManager().getPreparedStatementGetMetaData(request);
65      }
66      catch (SQLException   e)
67      {
68        return new ControllerException(e);
69      }
70    }
71  
72    /**
73     * @see org.continuent.sequoia.controller.virtualdatabase.protocol.DistributedVirtualDatabaseMessage#handleMessageMultiThreaded(org.continuent.sequoia.controller.virtualdatabase.DistributedVirtualDatabase,
74     *      org.continuent.hedera.common.Member, java.lang.Object)
75     */
76    public Serializable   handleMessageMultiThreaded(
77        DistributedVirtualDatabase dvdb, Member sender,
78        Object   handleMessageSingleThreadedResult)
79    {
80      return (Serializable  ) handleMessageSingleThreadedResult;
81    }
82  
83  }
84
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