Mercurial > dive4elements > river
annotate flys-aft/src/main/java/de/intevation/db/ConnectionBuilder.java @ 4288:b6f2ecaa6704
Parse start and end time of an observation
Parse start and end time of an observation from the artifact server xml
response.
author | Björn Ricks <bjoern.ricks@intevation.de> |
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date | Mon, 29 Oct 2012 09:56:55 +0100 |
parents | ee0c60757a94 |
children | f939e1e6cfa4 |
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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 : |