1
14
15 package com.liferay.portal.spring.hibernate;
16
17 import com.liferay.portal.dao.orm.hibernate.DB2Dialect;
18 import com.liferay.portal.kernel.dao.db.DBFactoryUtil;
19 import com.liferay.portal.kernel.dao.jdbc.DataAccess;
20 import com.liferay.portal.kernel.log.Log;
21 import com.liferay.portal.kernel.log.LogFactoryUtil;
22 import com.liferay.portal.kernel.util.GetterUtil;
23 import com.liferay.portal.kernel.util.StringBundler;
24
25 import java.sql.Connection;
26 import java.sql.DatabaseMetaData;
27
28 import java.util.Properties;
29
30 import javax.sql.DataSource;
31
32 import org.hibernate.dialect.DB2400Dialect;
33 import org.hibernate.dialect.Dialect;
34 import org.hibernate.dialect.SybaseASE15Dialect;
35 import org.hibernate.dialect.resolver.DialectFactory;
36
37
42 public class DialectDetector {
43
44 public static String determineDialect(DataSource dataSource) {
45 Dialect dialect = getDialect(dataSource);
46
47 DBFactoryUtil.setDB(dialect);
48
49 if (_log.isInfoEnabled()) {
50 _log.info("Using dialect " + dialect.getClass().getName());
51 }
52
53 return dialect.getClass().getName();
54 }
55
56 public static Dialect getDialect(DataSource dataSource) {
57 Dialect dialect = null;
58
59 Connection connection = null;
60
61 try {
62 connection = dataSource.getConnection();
63
64 DatabaseMetaData databaseMetaData = connection.getMetaData();
65
66 String dbName = databaseMetaData.getDatabaseProductName();
67 int dbMajorVersion = databaseMetaData.getDatabaseMajorVersion();
68
69 if (_log.isInfoEnabled()) {
70 _log.info(
71 "Determining dialect for " + dbName + " " + dbMajorVersion);
72 }
73
74 if (dbName.startsWith("HSQL")) {
75 if (_log.isWarnEnabled()) {
76 StringBundler sb = new StringBundler(6);
77
78 sb.append("Liferay is configured to use Hypersonic as ");
79 sb.append("its database. Do NOT use Hypersonic in ");
80 sb.append("production. Hypersonic is an embedded ");
81 sb.append("database useful for development and demo'ing ");
82 sb.append("purposes. The database settings can be ");
83 sb.append("changed in portal.properties.");
84
85 _log.warn(sb.toString());
86 }
87 }
88
89 if (dbName.equals("ASE") && (dbMajorVersion == 15)) {
90 dialect = new SybaseASE15Dialect();
91 }
92 else if (dbName.startsWith("DB2") && (dbMajorVersion == 9)) {
93 dialect = new DB2Dialect();
94 }
95 else {
96 dialect = DialectFactory.buildDialect(
97 new Properties(), connection);
98 }
99 }
100 catch (Exception e) {
101 String msg = GetterUtil.getString(e.getMessage());
102
103 if (msg.indexOf("explicitly set for database: DB2") != -1) {
104 dialect = new DB2400Dialect();
105
106 if (_log.isWarnEnabled()) {
107 _log.warn(
108 "DB2400Dialect was dynamically chosen as the " +
109 "Hibernate dialect for DB2. This can be " +
110 "overriden in portal.properties");
111 }
112 }
113 else {
114 _log.error(e, e);
115 }
116 }
117 finally {
118 DataAccess.cleanUp(connection);
119 }
120
121 if (dialect == null) {
122 throw new RuntimeException("No dialect found");
123 }
124
125 return dialect;
126 }
127
128 private static Log _log = LogFactoryUtil.getLog(DialectDetector.class);
129
130 }