11:07 a.m.
Hi 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
--------------------
| <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
---------------
|
| <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
-----------
|
| 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.
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