Could not find datasource !!!
siddharth_2279 Jul 19, 2008 12:07 PMHi All.
I am stuck in a peculiar problem and struggling with it. I have a created a standalone program in Java that accesses a database through a DataSource which I have configured in JBoss AS. I am trying to access the database using JNDI.
I have a program by the name of SaveExample
private static Context jndiContext; public static void main(String[] args) { // TODO Auto-generated method stub Session session = null; try{ System.out.println("Before Session Factory Configuration. !!!"); SessionFactory sf = new Configuration().configure().buildSessionFactory(); jndiContext = new InitialContext(); sf = (SessionFactory)jndiContext.lookup("java:MySqlDS"); session = sf.openSession(); System.out.println("After Session Factory Configuration. !!!"); }catch(Exception e){ e.printStackTrace(); }finally{ session.flush(); session.close(); } }
hibernate.cfg.xml
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<hibernate-configuration> <session-factory> <property name="hibernate.connection.datasource">MySqlDS</property> <property name="hibernate.session_factory_name">java:Mydatabase</property> <property name="hibernate.jndi.url"></property> <property name="hibernate.jndi.class"></property> <property name="hibernate.connection.username"></property> <property name="hibernate.connection.password"></property> <property name="show_sql">true</property> <property name="format_sql">true</property> <!-- Show and print nice SQL on stdout. --> <property name="dialect">org.hibernate.dialect.MySQLDialect</property> <property name="hibernate.hbm2ddl.auto">update</property> <!-- List of XML Mapping files --> <mapping resource="contact.hbm.xml"/> <!-- <mapping resource="address.hbm.xml"/> --> </session-factory> </hibernate-configuration>
I have put the lib file mysql-connector-java-5.1.5-bin.jar in the server\default\lib folder of JBoss and I have put the mysql-ds.xml file in server\default\deploy directory of JBoss.
mysql-ds.xml
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<datasources> <local-tx-datasource> <jndi-name>MySqlDS</jndi-name> <connection-url>jdbc:mysql://localhost:3306/jbossdb</connection-url> <!-- Added by me for configuting a data source for remote usage --> <use-java-context>false</use-java-context> <driver-class>com.mysql.jdbc.Driver</driver-class> <user-name>root</user-name> <password>root</password> <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name> <!-- should only be used on drivers after 3.22.1 with "ping" support <valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLValidConnectionChecker</valid-connection-checker-class-name> --> <!-- sql to call when connection is created <new-connection-sql>some arbitrary sql</new-connection-sql> --> <!-- sql to call on an existing pooled connection when it is obtained from pool - MySQLValidConnectionChecker is preferred for newer drivers <check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql> --> <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml --> <metadata> <type-mapping>mySQL</type-mapping> </metadata> </local-tx-datasource> </datasources>
Exception
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Before Session Factory Configuration. !!! log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment). log4j:WARN Please initialize the log4j system properly. org.hibernate.HibernateException: Could not find datasource at org.hibernate.connection.DatasourceConnectionProvider.configure(DatasourceConnectionProvider.java:56) at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:124) at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:56) at org.hibernate.cfg.SettingsFactory.createConnectionProvider(SettingsFactory.java:414) at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:62) at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2009) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1292) at com.example.jndi.JNDIExample.main(JNDIExample.java:27) Caused by: javax.naming.NoInitialContextException: Cannot instantiate class: [Root exception is java.lang.ClassNotFoundException: ] at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:657) at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:247) at javax.naming.InitialContext.init(InitialContext.java:223) at javax.naming.InitialContext.<init>(InitialContext.java:197) at org.hibernate.util.NamingHelper.getInitialContext(NamingHelper.java:28) at org.hibernate.connection.DatasourceConnectionProvider.configure(DatasourceConnectionProvider.java:52) ... 7 more Caused by: java.lang.ClassNotFoundException: at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:242) at com.sun.naming.internal.VersionHelper12.loadClass(VersionHelper12.java:42) at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:654) ... 12 more Exception in thread "main" java.lang.NullPointerException at com.example.jndi.JNDIExample.main(JNDIExample.java:44)
My problem is that the program (SaveExample.java) in Eclipse is running as a Java Application and Jboss server is running in another console window. So how could I make them connect to each other so that they the application program can recognize the datasource and not given Could not find datasource exception.