Mercurial > dive4elements > river

annotate flys-aft/src/main/java/de/intevation/db/ConnectedStatements.java @ 4365:7e3dc021452a

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
StyledSeriesBuilder: Corrected doc.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Fri, 02 Nov 2012 12:12:20 +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