Mercurial > dive4elements > river

annotate flys-aft/src/main/java/de/intevation/db/ConnectionBuilder.java @ 4269:0c766c475805

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Add Panel and Tree UI classes for dispayling the measurement station info The new ui classes are using the new extracted base class InfoPanel and InfoTree which are in common with the gauge info.
author Björn Ricks <bjoern.ricks@intevation.de>
date Fri, 26 Oct 2012 12:22:06 +0200
parents ee0c60757a94
children f939e1e6cfa4
rev   line source
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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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.util.HashMap;
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6
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7 import org.w3c.dom.Document;
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8
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9 import javax.xml.xpath.XPathConstants;
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10
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11 import java.sql.Connection;
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12 import java.sql.SQLException;
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13 import java.sql.DriverManager;
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14 import java.sql.DatabaseMetaData;
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15
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16 import org.apache.log4j.Logger;
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17
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18 public class ConnectionBuilder
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19 {
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20 private static Logger log = Logger.getLogger(ConnectionBuilder.class);
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21
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22 public static final String XPATH_DRIVER = "/sync/side[@name=$type]/db/driver/text()";
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23 public static final String XPATH_USER = "/sync/side[@name=$type]/db/user/text()";
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24 public static final String XPATH_PASSWORD = "/sync/side[@name=$type]/db/password/text()";
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25 public static final String XPATH_URL = "/sync/side[@name=$type]/db/url/text()";
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26
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27 protected String type;
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28 protected String driver;
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29 protected String user;
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30 protected String password;
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31 protected String url;
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32
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33 public ConnectionBuilder(String type, Document document) {
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34 this.type = type;
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35 extractCredentials(document);
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36 }
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37
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38 protected void extractCredentials(Document document) {
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39 HashMap<String, String> map = new HashMap<String, String>();
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40 map.put("type", type);
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41
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42 driver = (String)XML.xpath(
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43 document, XPATH_DRIVER, XPathConstants.STRING, null, map);
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44 user = (String)XML.xpath(
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45 document, XPATH_USER, XPathConstants.STRING, null, map);
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46 password = (String)XML.xpath(
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47 document, XPATH_PASSWORD, XPathConstants.STRING, null, map);
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48 url = (String)XML.xpath(
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49 document, XPATH_URL, XPathConstants.STRING, null, map);
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50
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51 if (log.isDebugEnabled()) {
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52 log.debug("driver: " + driver);
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53 log.debug("user: " + user);
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54 log.debug("password: *******");
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55 log.debug("url: " + url);
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56 }
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57 }
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58
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59 public Connection getConnection() throws SQLException {
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60
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61 if (driver != null && driver.length() > 0) {
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62 try {
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63 Class.forName(driver);
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64 }
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65 catch (ClassNotFoundException cnfe) {
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66 throw new SQLException(cnfe);
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67 }
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68 }
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69
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70 Connection connection =
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71 DriverManager.getConnection(url, user, password);
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72
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73 connection.setAutoCommit(false);
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74
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75 DatabaseMetaData metaData = connection.getMetaData();
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76
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77 if (metaData.supportsTransactionIsolationLevel(
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78 Connection.TRANSACTION_READ_UNCOMMITTED)) {
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79 connection.setTransactionIsolation(
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80 Connection.TRANSACTION_READ_UNCOMMITTED);
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81 }
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82
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83 return connection;
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84 }
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85
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86 public ConnectedStatements getConnectedStatements() throws SQLException {
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87 return new ConnectedStatements(
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88 getConnection(),
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89 new Statements(type, driver != null ? driver : "")
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90 .getStatements());
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91 }
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92 }
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93 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org