Project

General

Profile

1
/**
2
 *  '$RCSfile$'
3
 *    Purpose: A class to test how many sql command one connection can execute
4
 *  Copyright: 2000 Regents of the University of California and the
5
 *             National Center for Ecological Analysis and Synthesis
6
 *    Authors: Jing Tao
7
 *
8
 *   '$Author: leinfelder $'
9
 *     '$Date: 2011-11-02 20:40:12 -0700 (Wed, 02 Nov 2011) $'
10
 * '$Revision: 6595 $'
11
 *
12
 * This program is free software; you can redistribute it and/or modify
13
 * it under the terms of the GNU General Public License as published by
14
 * the Free Software Foundation; either version 2 of the License, or
15
 * (at your option) any later version.
16
 *
17
 * This program is distributed in the hope that it will be useful,
18
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20
 * GNU General Public License for more details.
21
 *
22
 * You should have received a copy of the GNU General Public License
23
 * along with this program; if not, write to the Free Software
24
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
25
 */
26

    
27

    
28

    
29
import java.io.*;
30
import java.util.Vector;
31
import java.lang.*;
32
import java.sql.*;
33
import edu.ucsb.nceas.metacat.*;
34
import edu.ucsb.nceas.metacat.database.*;
35

    
36

    
37
/**
38
 * A class to test when mamimum dbconnection number reached
39
 */
40
 
41
public class MaxmumDBConnection implements Runnable
42
{
43
 
44
  /**
45
   * Usage: java -cp metacat.jar   < -t times>
46
   *
47
   */
48
  public static void main(String [] args) throws Exception
49
  {
50
    // defaul loop value is 10
51
    int loop = 10;
52
    Thread runner = null;
53
       
54
    DBConnectionPool pool = DBConnectionPool.getInstance();
55

    
56
 
57
    // get loop number from argument
58
    for ( int i=0 ; i < args.length; ++i ) 
59
    {
60
       
61
      if ( args[i].equals( "-t" ) ) 
62
      {
63
          loop =  Integer.parseInt(args[++i]);
64
      }//if 
65
      else 
66
      {
67
          System.err.println("   args[" +i+ "] '" +args[i]+ "' ignored." );
68
      }//else
69
    }//for
70
      
71
    System.out.println("loop: "+loop);
72
      
73
    //ran the number of thread.
74
    for (int i= 0; i<loop; i++)
75
    {
76
          runner = new Thread( new MaxmumDBConnection());
77
          runner.start();
78
  
79
    }//for
80
    System.out.println("End");
81
     
82
   
83
   
84
  }//main
85
  
86

    
87
   
88
  
89
  /**
90
   * Method to run a sal insert command
91
   * @param conn, the connection will be used
92
   * @param i, part of docid
93
   */
94
  private static void insert(long i) throws SQLException
95
  {
96
   
97
    int serialNumber = 0;
98
    DBConnection conn = null;
99
    PreparedStatement pStmt = null;
100
    String sql = "insert into xml_documents (docid) values (?)";
101
    String docid = "jing."+i;
102
  
103
    try 
104
    {
105
      conn = DBConnectionPool.getDBConnection("insert");
106
     
107
      serialNumber = conn.getCheckOutSerialNumber();
108
      System.out.println("serialNumber: "+serialNumber);
109
      pStmt = conn.prepareStatement(sql);
110
      pStmt.setString(1, docid);
111
      pStmt.execute();
112
      System.out.println("Inserted successfully: "+i);
113
     }
114
     finally
115
     {
116
       try
117
       {
118
          pStmt.close();
119
       }
120
       finally
121
       {
122
          DBConnectionPool.returnDBConnection(conn, serialNumber);
123
          System.out.println("return inert conn!");
124
          System.out.println("the return insert connection's status: "
125
                                                 +conn.getStatus());
126
       }
127
     }
128
    
129
  }//insert
130
    
131
 
132
  /**
133
   * Method to run a sql select commnad
134
   * @param conn, connection will be used
135
   */
136
  private static void select() throws SQLException
137
  {
138
   
139
    int serialNumber = 0;
140
    DBConnection conn = null;
141
    PreparedStatement pStmt = null;
142
    ResultSet rs = null;
143
    String sql = "select docid from xml_documents where docid like ?";
144
    
145
    try
146
    {
147
      conn = DBConnectionPool.getDBConnection("select");
148
      serialNumber = conn.getCheckOutSerialNumber();
149
      System.out.println("serialNumber: "+serialNumber);
150
      pStmt = conn.prepareStatement(sql);
151
      pStmt.setString(1, "%jing%");
152
      pStmt.execute();
153
      rs = pStmt.getResultSet();
154
      if (rs.next())
155
      {
156
        String str = rs.getString(1);
157
        System.out.println("Select docid: "+str);
158
      }//if
159
    }//try
160
    finally
161
    {
162
      try
163
      {
164
        pStmt.close();
165
      }//try
166
      finally
167
      {
168
        DBConnectionPool.returnDBConnection(conn,serialNumber);
169
        System.out.println("return select conn!");
170
        System.out.println("the return insert connection's status: "
171
                                                        +conn.getStatus());
172
      }//finally
173

    
174
    }//fianlly
175
    
176
  }//select
177
  
178
  public void run()
179
  {
180
     long index = (new Double (Math.random()*100000)).longValue();
181
     try
182
     {
183
       insert(index);
184
       select();
185
     }//try
186
     catch (SQLException e)
187
     {
188
       System.out.println("error is run: "+e.getMessage());
189
     }
190
     
191
  }
192
     
193
  
194
}//DBConnectionPoolTester
(2-2/52)