Mercurial > dive4elements > river

annotate flys-aft/src/main/java/de/intevation/db/ConnectedStatements.java @ 4324:4980659b2f22

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Add gauge name to the measurement station xml response The reference gauge should be displayed in the measurement station info panel. Therefore the artifact service must return the name of the gauge.
author Björn Ricks <bjoern.ricks@intevation.de>
date Tue, 30 Oct 2012 12:49:17 +0100
parents aad1886ea226
children b195fede1c3b
rev   line source
4074
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
1 package de.intevation.db;
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
2
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
3 import java.util.HashMap;
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
4 import java.util.Map;
4086
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
5 import java.util.Deque;
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
6 import java.util.ArrayDeque;
4074
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
7
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
8 import java.sql.Connection;
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
9 import java.sql.SQLException;
4086
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
10 import java.sql.Savepoint;
4087
aad1886ea226 Store new gauges in FLYS db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4086
diff changeset
11 import java.sql.DatabaseMetaData;
aad1886ea226 Store new gauges in FLYS db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4086
diff changeset
12
aad1886ea226 Store new gauges in FLYS db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4086
diff changeset
13 import org.apache.log4j.Logger;
4074
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
14
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
15 public class ConnectedStatements
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
16 {
4087
aad1886ea226 Store new gauges in FLYS db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4086
diff changeset
17 private static Logger log = Logger.getLogger(ConnectedStatements.class);
aad1886ea226 Store new gauges in FLYS db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4086
diff changeset
18
4074
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
19 protected Connection connection;
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
20
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
21 protected Map<String, SymbolicStatement> statements;
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
22
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
23 protected Map<String, SymbolicStatement.Instance> boundStatements;
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
24
4086
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
25 protected Deque<Savepoint> savepoints;
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
26
4074
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
27 public ConnectedStatements(
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
28 Connection connection,
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
29 Map<String, SymbolicStatement> statements
4086
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
30 )
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
31 throws SQLException
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
32 {
4074
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
33 this.connection = connection;
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
34 this.statements = statements;
4086
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
35 checkSavePoints();
4074
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
36
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
37 boundStatements = new HashMap<String, SymbolicStatement.Instance>();
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
38 }
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
39
4086
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
40 protected void checkSavePoints() throws SQLException {
4087
aad1886ea226 Store new gauges in FLYS db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4086
diff changeset
41 DatabaseMetaData metaData = connection.getMetaData();
aad1886ea226 Store new gauges in FLYS db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4086
diff changeset
42 if (metaData.supportsSavepoints()) {
aad1886ea226 Store new gauges in FLYS db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4086
diff changeset
43 log.info("Driver '" + metaData.getDriverName() +
aad1886ea226 Store new gauges in FLYS db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4086
diff changeset
44 "' does support savepoints.");
4086
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
45 savepoints = new ArrayDeque<Savepoint>();
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
46 }
4087
aad1886ea226 Store new gauges in FLYS db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4086
diff changeset
47 else {
aad1886ea226 Store new gauges in FLYS db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4086
diff changeset
48 log.info("Driver '" + metaData.getDriverName() +
aad1886ea226 Store new gauges in FLYS db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4086
diff changeset
49 "' does not support savepoints.");
aad1886ea226 Store new gauges in FLYS db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4086
diff changeset
50 }
4086
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
51 }
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
52
4074
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
53 public SymbolicStatement.Instance getStatement(String key)
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
54 throws SQLException
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
55 {
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
56 SymbolicStatement.Instance stmnt = boundStatements.get(key);
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
57 if (stmnt != null) {
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
58 return stmnt;
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
59 }
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
60
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
61 SymbolicStatement ss = statements.get(key);
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
62 if (ss == null) {
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
63 return null;
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
64 }
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
65
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
66 stmnt = ss.new Instance(connection);
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
67 boundStatements.put(key, stmnt);
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
68 return stmnt;
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
69 }
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
70
4087
aad1886ea226 Store new gauges in FLYS db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4086
diff changeset
71 public void beginTransaction() throws SQLException {
4086
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
72 if (savepoints != null) {
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
73 savepoints.push(connection.setSavepoint());
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
74 }
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
75 }
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
76
4087
aad1886ea226 Store new gauges in FLYS db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4086
diff changeset
77 public void commitTransaction() throws SQLException {
4086
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
78 if (savepoints != null) {
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
79 savepoints.pop();
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
80 }
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
81 connection.commit();
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
82 }
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
83
4087
aad1886ea226 Store new gauges in FLYS db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4086
diff changeset
84 public void rollbackTransaction() throws SQLException {
4086
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
85 if (savepoints != null) {
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
86 Savepoint savepoint = savepoints.pop();
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
87 connection.rollback(savepoint);
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
88 }
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
89 else {
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
90 connection.rollback();
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
91 }
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
92 }
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
93
4074
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
94 public void close() {
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
95 for (SymbolicStatement.Instance s: boundStatements.values()) {
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
96 s.close();
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
97 }
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
98
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
99 try {
4086
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
100 if (savepoints != null && !savepoints.isEmpty()) {
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
101 Savepoint savepoint = savepoints.peekFirst();
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
102 connection.rollback(savepoint);
ee0c60757a94 Added transaction support
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4074
diff changeset
103 }
4074
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
104 connection.close();
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
105 }
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
106 catch (SQLException sqle) {
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
107 }
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
108 }
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
109 }
100c4e0a45e1 Improved infrastructure for prepared statements.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
110 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org