Mercurial > dive4elements > river

annotate flys-aft/src/main/java/de/intevation/db/ConnectionBuilder.java @ 5622:b28a6d05e969

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Add a new mechanism in mapfish print call to add arbitary data maps Data properties are identified by starting with mapfish-data and they are then split in info value pairs where info can be the description of the information and value the value of the information to be transported in the data map.
author Andre Heinecke <aheinecke@intevation.de>
date Tue, 09 Apr 2013 19:04:32 +0200
parents d9f1202cef78
children
rev   line source
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1 package de.intevation.db;
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2
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3 import de.intevation.utils.XML;
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4
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5 import java.sql.Connection;
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6 import java.sql.DatabaseMetaData;
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7 import java.sql.DriverManager;
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8 import java.sql.SQLException;
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9 import java.sql.Statement;
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10
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11 import java.util.ArrayList;
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12 import java.util.HashMap;
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13 import java.util.List;
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14
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15 import javax.xml.xpath.XPathConstants;
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16
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17 import org.apache.log4j.Logger;
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18
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19 import org.w3c.dom.Document;
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20 import org.w3c.dom.NodeList;
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21
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22 public class ConnectionBuilder
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23 {
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24 private static Logger log = Logger.getLogger(ConnectionBuilder.class);
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25
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26 public static final String XPATH_DRIVER = "/sync/side[@name=$type]/db/driver/text()";
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27 public static final String XPATH_USER = "/sync/side[@name=$type]/db/user/text()";
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28 public static final String XPATH_PASSWORD = "/sync/side[@name=$type]/db/password/text()";
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29 public static final String XPATH_URL = "/sync/side[@name=$type]/db/url/text()";
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30 public static final String XPATH_EXEC_LOGIN = "/sync/side[@name=$type]/db/execute-login/statement";
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31
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32 protected String type;
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33 protected String driver;
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34 protected String user;
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35 protected String password;
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36 protected String url;
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37 protected List<String> loginStatements;
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38
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39 public ConnectionBuilder(String type, Document document) {
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40 this.type = type;
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41 extractCredentials(document);
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42 }
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43
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44 protected static List<String> extractStrings(NodeList nodes) {
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45 int N = nodes.getLength();
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46 List<String> result = new ArrayList<String>(N);
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47 for (int i = 0; i < N; ++i) {
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48 result.add(nodes.item(i).getTextContent());
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49 }
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50 return result;
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51 }
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52
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53 protected void extractCredentials(Document document) {
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54 HashMap<String, String> map = new HashMap<String, String>();
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55 map.put("type", type);
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56
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57 driver = (String)XML.xpath(
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58 document, XPATH_DRIVER, XPathConstants.STRING, null, map);
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59 user = (String)XML.xpath(
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60 document, XPATH_USER, XPathConstants.STRING, null, map);
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61 password = (String)XML.xpath(
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62 document, XPATH_PASSWORD, XPathConstants.STRING, null, map);
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63 url = (String)XML.xpath(
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64 document, XPATH_URL, XPathConstants.STRING, null, map);
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65 loginStatements = extractStrings((NodeList)XML.xpath(
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66 document, XPATH_EXEC_LOGIN, XPathConstants.NODESET, null, map));
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67
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68 if (log.isDebugEnabled()) {
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69 log.debug("driver: " + driver);
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70 log.debug("user: " + user);
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71 log.debug("password: *******");
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72 log.debug("url: " + url);
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73 log.debug("number of login statements: " + loginStatements.size());
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74 }
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75 }
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76
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77 public Connection getConnection() throws SQLException {
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78
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79 if (driver != null && driver.length() > 0) {
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80 try {
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81 Class.forName(driver);
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82 }
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83 catch (ClassNotFoundException cnfe) {
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84 throw new SQLException(cnfe);
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85 }
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86 }
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87
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88 Connection connection =
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89 DriverManager.getConnection(url, user, password);
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90
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91 connection.setAutoCommit(false);
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92
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93 DatabaseMetaData metaData = connection.getMetaData();
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94
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95 if (metaData.supportsTransactionIsolationLevel(
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96 Connection.TRANSACTION_READ_UNCOMMITTED)) {
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97 connection.setTransactionIsolation(
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98 Connection.TRANSACTION_READ_UNCOMMITTED);
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99 }
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100
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101 for (String sql: loginStatements) {
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102 Statement stmnt = connection.createStatement();
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103 try {
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104 stmnt.execute(sql);
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105 }
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106 finally {
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107 stmnt.close();
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108 }
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109 }
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110
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111 return connection;
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112 }
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113
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114 public ConnectedStatements getConnectedStatements() throws SQLException {
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115 return new ConnectedStatements(
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116 getConnection(),
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117 new Statements(type, driver != null ? driver : "")
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118 .getStatements());
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119 }
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120 }
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121 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org