Mercurial > dive4elements > river

annotate flys-aft/src/main/java/de/intevation/db/ConnectedStatements.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 f939e1e6cfa4
children
rev   line source
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1 package de.intevation.db;
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2
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3 import java.sql.Connection;
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4 import java.sql.DatabaseMetaData;
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5 import java.sql.SQLException;
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6 import java.sql.Savepoint;
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7
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8 import java.util.ArrayDeque;
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9 import java.util.Deque;
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10 import java.util.HashMap;
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11 import java.util.Map;
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12
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13 import org.apache.log4j.Logger;
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14
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15 public class ConnectedStatements
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16 {
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17 private static Logger log = Logger.getLogger(ConnectedStatements.class);
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18
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19 protected Connection connection;
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20
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21 protected Map<String, SymbolicStatement> statements;
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22
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23 protected Map<String, SymbolicStatement.Instance> boundStatements;
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24
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25 protected Deque<Savepoint> savepoints;
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26
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27 public ConnectedStatements(
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28 Connection connection,
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29 Map<String, SymbolicStatement> statements
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30 )
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31 throws SQLException
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32 {
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33 this.connection = connection;
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34 this.statements = statements;
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35 checkSavePoints();
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36
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37 boundStatements = new HashMap<String, SymbolicStatement.Instance>();
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38 }
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39
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40 protected void checkSavePoints() throws SQLException {
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41 DatabaseMetaData metaData = connection.getMetaData();
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42 if (metaData.supportsSavepoints()) {
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43 log.info("Driver '" + metaData.getDriverName() +
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44 "' does support savepoints.");
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45 savepoints = new ArrayDeque<Savepoint>();
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46 }
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47 else {
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48 log.info("Driver '" + metaData.getDriverName() +
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49 "' does not support savepoints.");
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50 }
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51 }
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52
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53 public SymbolicStatement.Instance getStatement(String key)
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54 throws SQLException
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55 {
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56 SymbolicStatement.Instance stmnt = boundStatements.get(key);
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57 if (stmnt != null) {
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58 return stmnt;
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59 }
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60
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61 SymbolicStatement ss = statements.get(key);
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62 if (ss == null) {
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63 return null;
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64 }
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65
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66 stmnt = ss.new Instance(connection);
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67 boundStatements.put(key, stmnt);
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68 return stmnt;
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69 }
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70
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71 public void beginTransaction() throws SQLException {
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72 if (savepoints != null) {
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73 savepoints.push(connection.setSavepoint());
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74 }
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75 }
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76
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77 public void commitTransaction() throws SQLException {
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78 if (savepoints != null) {
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79 savepoints.pop();
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80 }
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81 connection.commit();
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82 }
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83
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84 public void rollbackTransaction() throws SQLException {
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85 if (savepoints != null) {
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86 Savepoint savepoint = savepoints.pop();
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87 connection.rollback(savepoint);
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88 }
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89 else {
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90 connection.rollback();
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91 }
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92 }
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93
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94 public void close() {
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95 for (SymbolicStatement.Instance s: boundStatements.values()) {
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96 s.close();
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97 }
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98
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99 try {
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100 if (savepoints != null && !savepoints.isEmpty()) {
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101 Savepoint savepoint = savepoints.peekFirst();
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102 connection.rollback(savepoint);
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103 }
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104 connection.close();
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105 }
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106 catch (SQLException sqle) {
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107 }
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108 }
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109 }
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110 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org