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annotate artifact-database/src/main/java/de/intevation/artifactdatabase/db/DBConnection.java @ 355:6bd37edd9a80

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Added handy implementation of a DataProvider. artifacts/trunk@3333 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 30 Nov 2011 08:28:04 +0000
parents 6d239c58c636
children
rev   line source
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1 package de.intevation.artifactdatabase.db;
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2
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3 import javax.sql.DataSource;
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4
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5 import java.io.File;
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6
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7 import org.apache.commons.pool.ObjectPool;
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8
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9 import org.apache.commons.pool.impl.GenericObjectPool;
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10
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11 import org.apache.commons.dbcp.DriverManagerConnectionFactory;
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12 import org.apache.commons.dbcp.PoolableConnectionFactory;
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13 import org.apache.commons.dbcp.PoolingDataSource;
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15 import de.intevation.artifacts.common.utils.Config;
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17 import org.apache.log4j.Logger;
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19 public class DBConnection
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20 {
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21 private static Logger log = Logger.getLogger(DBConnection.class);
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22
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23 public static final String DEFAULT_DRIVER = "org.h2.Driver";
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24 public static final String DEFAULT_USER = "";
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25 public static final String DEFAULT_PASSWORD = "";
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26 public static final String DEFAULT_DATABASE_FILE = "artifacts.db";
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27 public static final String DEFAULT_URL = getDefaultURL();
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28
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29 public static final String getDefaultURL() {
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30 File configDir = Config.getConfigDirectory();
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31 File databaseFile = new File(configDir, DEFAULT_DATABASE_FILE);
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32 return "jdbc:h2:" + databaseFile;
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33 }
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34
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35 protected DataSource dataSource;
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37 protected String driver;
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38 protected String url;
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39 protected String user;
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40 protected String password;
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41
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42 public DBConnection() {
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43 }
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45 public DBConnection(
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46 String driver,
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47 String url,
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48 String user,
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49 String password
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50 ) {
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51 this.driver = driver;
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52 this.url = url;
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53 this.user = user;
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54 this.password = password;
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55 }
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56
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57 public String getUser() {
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58 return user;
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59 }
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61 public void setUser(String user) {
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62 this.user = user;
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63 }
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64
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65 public String getPassword() {
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66 return password;
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67 }
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69 public void setPassword(String password) {
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70 this.password = password;
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71 }
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73 public String getDriver() {
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74 return driver;
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75 }
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77 public void setDriver(String driver) {
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78 this.driver = driver;
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79 }
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81 public String getUrl() {
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82 return url;
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83 }
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84
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85 public void setUrl(String url) {
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86 this.url = url;
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87 }
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89 public synchronized DataSource getDataSource() {
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90 if (dataSource == null) {
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91 if (log.isDebugEnabled()) {
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92 log.debug("create new datasource:");
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93 log.debug(" driver: " + driver);
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94 log.debug(" url : " + url);
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95 log.debug(" user : " + user);
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96 }
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97
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98 try {
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99 synchronized (DBConnection.class) {
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100 Class.forName(driver);
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101 }
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102 }
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103 catch (ClassNotFoundException cnfe) {
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104 log.error("cannot load driver", cnfe);
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105 return null;
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106 }
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107
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108 DriverManagerConnectionFactory dmcf =
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109 new DriverManagerConnectionFactory(url, user, password);
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110
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111 ObjectPool cp = new GenericObjectPool();
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112
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113 PoolableConnectionFactory pcf = new PoolableConnectionFactory(
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114 dmcf, cp, null, null, false, false);
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115
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116 dataSource = new PoolingDataSource(cp);
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117 }
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118 return dataSource;
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119 }
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120 }
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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