Data Source - Jboss - Hibernate

Using datasource to connect database

I hosted  Java web app with MySQL database in Jboss server. When every morning  I see it database connection was lost.Then I ran a query to see timeout variables.

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1. SHOW VARIABLES LIKE '%timeout%'  

SHOW VARIABLES LIKE '%timeout%'

wait_timout = 28800

28800 = 8 hours.

If there is no request comes after 8 hours  connection will be lost. I tried several solution for this.After using datasource to connect database that problem was solved.

 mysql-ds.xml

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1. <?xml version="1.0" encoding="UTF-8"?>  
2.   
3. <!-- $Id: mysql-ds.xml 41017 2006-02-07 14:26:14Z acoliver $ -->  
4. <!--  Datasource config for MySQL using 3.0.9 available from:  
5. http://www.mysql.com/downloads/api-jdbc-stable.html  
6. -->  
7.   
8. <datasources>  
9.   <local-tx-datasource>  
10.     <jndi-name>myDataSource</jndi-name>  
11.     <connection-url>jdbc:mysql://localhost:3306/mydb</connection-url>  
12.     <driver-class>com.mysql.jdbc.Driver</driver-class>  
13.     <user-name>root</user-name>  
14.     <password>123</password>  
15.     <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name>  
16.     <!-- should only be used on drivers after 3.22.1 with "ping" support  
17.     <valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLValidConnectionChecker</valid-connection-checker-class-name>  
18.     -->  
19.     <!-- sql to call when connection is created  
20.     <new-connection-sql>some arbitrary sql</new-connection-sql>  
21.       -->  
22.     <!-- sql to call on an existing pooled connection when it is obtained from pool - MySQLValidConnectionChecker is preferred for newer drivers  
23.     <check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql>  
24.       -->  
25.   
26.     <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) -->  
27.     <metadata>  
28.        <type-mapping>mySQL</type-mapping>  
29.     </metadata>  
30.   </local-tx-datasource>  
31. </datasources>  

<?xml version="1.0" encoding="UTF-8"?>

<!-- $Id: mysql-ds.xml 41017 2006-02-07 14:26:14Z acoliver $ -->
<!--  Datasource config for MySQL using 3.0.9 available from:
http://www.mysql.com/downloads/api-jdbc-stable.html
-->

<datasources>
  <local-tx-datasource>
    <jndi-name>myDataSource</jndi-name>
    <connection-url>jdbc:mysql://localhost:3306/mydb</connection-url>
    <driver-class>com.mysql.jdbc.Driver</driver-class>
    <user-name>root</user-name>
    <password>123</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 (optional) -->
    <metadata>
       <type-mapping>mySQL</type-mapping>
    </metadata>
  </local-tx-datasource>
</datasources>

hibernate.cfg.xml

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1.  <?xml version='1.0' encoding='UTF-8'?>  
2. <!DOCTYPE hibernate-configuration PUBLIC  
3.           "-//Hibernate/Hibernate Configuration DTD 3.0//EN"  
4.           "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">  
5.   
6. <hibernate-configuration>  
7.     <session-factory>  
8.         <property name="dialect">org.hibernate.dialect.MySQLDialect</property>  
9.         <property name="connection.datasource">java:myDataSource</property>  
10.         <!--<mapping class="com.sameera.domain.User" />-->  
11.         
12.     </session-factory>  
13.   
14. </hibernate-configuration>  

 <?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
    <session-factory>
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="connection.datasource">java:myDataSource</property>
        <!--<mapping class="com.sameera.domain.User" />-->
      
    </session-factory>

</hibernate-configuration>

mysql-ds.xml file is taken from jboss server.. jboss-5.1.0.GA\docs\examples\jca
'myDataSource' is the name of datasource

I put mysql-connector-java-5.1.5-bin.jar  to the jboss-5.1.0.GA\server\default\lib