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annotate artifact-database/src/main/java/de/intevation/artifactdatabase/db/SQLExecutor.java @ 305:f33401ea2a6c

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Artifact database: Refactorized the usage of dialect independent SQL to be reusable. artifacts/trunk@2412 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Thu, 28 Jul 2011 10:19:35 +0000
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305
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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1 package de.intevation.artifactdatabase.db;
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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2
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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3 import java.sql.Connection;
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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4 import java.sql.PreparedStatement;
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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5 import java.sql.ResultSet;
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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6 import java.sql.SQLException;
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7
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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8 import javax.sql.DataSource;
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9
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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10 import org.apache.log4j.Logger;
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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11
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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12 public class SQLExecutor
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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13 {
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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14 private static Logger logger = Logger.getLogger(SQLExecutor.class);
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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15
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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16 public class Instance {
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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17
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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18 public Connection conn;
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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19 public PreparedStatement stmnt;
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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20 public ResultSet result;
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21
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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22 public Instance() {
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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23 }
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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24
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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25 public void reset() throws SQLException {
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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26 if (result != null) {
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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27 result.close();
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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28 result = null;
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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29 }
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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30 if (stmnt != null) {
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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31 result = null;
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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32 stmnt.close();
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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33 }
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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34 }
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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35
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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36 public PreparedStatement prepareStatement(String query)
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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37 throws SQLException {
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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38 return stmnt = conn.prepareStatement(query);
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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39 }
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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40
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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41 public void close() {
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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42 if (result != null) {
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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43 try { result.close(); }
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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44 catch (SQLException sqle) {}
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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45 }
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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46 if (stmnt != null) {
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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47 try { stmnt.close(); }
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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48 catch (SQLException sqle) {}
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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49 }
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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50 if (conn != null) {
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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51 try { conn.close(); }
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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52 catch (SQLException sqle) {}
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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53 }
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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54 }
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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55
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56 public boolean runWrite() {
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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57 DataSource dataSource = dbConnection.getDataSource();
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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58 try {
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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59 conn = dataSource.getConnection();
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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60 try {
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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61 conn.setAutoCommit(false);
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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62 return doIt();
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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63 }
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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64 catch (SQLException sqle) {
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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65 conn.rollback();
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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66 throw sqle;
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67 }
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68 }
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69 catch (SQLException sqle) {
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70 logger.error(sqle.getLocalizedMessage(), sqle);
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71 }
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72 finally {
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73 close();
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74 }
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75 return false;
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76 }
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77
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78 public boolean runRead() {
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79 DataSource dataSource = dbConnection.getDataSource();
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80 try {
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81 conn = dataSource.getConnection();
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82 return doIt();
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83 }
f33401ea2a6c Artifact database: Refactorized the usage of dialect independent SQL to be reusable.
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84 catch (SQLException sqle) {
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85 logger.error(sqle.getLocalizedMessage(), sqle);
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86 }
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87 finally {
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88 close();
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89 }
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90 return false;
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91 }
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92
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93 public boolean doIt() throws SQLException {
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94 return true;
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95 }
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96 } // class Instance
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97
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98 protected DBConnection dbConnection;
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99
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100 public SQLExecutor() {
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101 }
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102
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103 public SQLExecutor(DBConnection dbConnection) {
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104 this.dbConnection = dbConnection;
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105 }
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106
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107 public DBConnection getDBConnection() {
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108 return dbConnection;
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109 }
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110 }
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111 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org