Iam working on a project where i want to configure a shared connection pool with hibernate on tomcat. The project is already implemented and i have to change it. It was configured with hibernate and c3p0 connection pool where all jars where in the project itself.
I copied all jar files for connection pooling into the lib folder of tomcat.
- c3p0-0.9.5.2.jar
- c3p0-oracle-thin-extras-0.9.5.2.jar
- mchange-commons-java-0.2.11.jar
- mysql-connector-java-5.1.40-bin.jar
in server.xml i made a Resource
<Resource auth="Container"
description="DB Connection"
driverClass="com.mysql.jdbc.Driver"
maxPoolSize="40"
minPoolSize="10"
acquireIncrement="1"
name="jdbc/test"
user="admin"
password="root"
factory="org.apache.naming.factory.BeanFactory"
type="com.mchange.v2.c3p0.ComboPooledDataSource"
jdbcUrl="jdbc:mysql://localhost:3306/testDB" />
<ResourceLink
global="jdbc/test"
name="jdbc/test"
type="javax.sql.DataSource" />
after this i can see my connections created by the pool in phpmyadmin(mysql).
In my web.xml file of my project i created a resource-ref.`
<resource-ref>
<description>DB Connection</description>
<res-ref-name>jdbc/testDB</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
`
And my hibernate.cfg.xml file `
</hibernate-configuration>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="connection.datasource">java:comp/env/jdbc/testDB</property>
<mapping resource="Database.hbm.xml"/>
</hibernate-configuration>
Thats what i have done till yet. My problem is. In my project i have a sessionfactory where i set my hibernate.cfg.xml and Database.hbm.xml file. This is now giving me a java.lang.NullPointerException.
Do i have to configure the sessionfactory also on tomcat as resource?
At Tomcat:
Jun 29, 2017 10:06:19 AM org.apache.catalina.mbeans.GlobalResourcesLifecycleListener createMBeans
SCHWERWIEGEND: Exception processing Global JNDI Resources
javax.naming.NamingException: Could not load resource factory class [Root exception is java.lang.ClassNotFoundException: myutil.hibernate.HibernateSessionFactoryTomcatFactory]
at org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:82)
at javax.naming.spi.NamingManager.getObjectInstance(Unknown Source)
at org.apache.naming.NamingContext.lookup(NamingContext.java:842)
at org.apache.naming.NamingContext.lookup(NamingContext.java:153)
at org.apache.naming.NamingContextBindingsEnumeration.nextElementInternal(NamingContextBindingsEnumeration.java:117)
at org.apache.naming.NamingContextBindingsEnumeration.next(NamingContextBindingsEnumeration.java:71)
at org.apache.naming.NamingContextBindingsEnumeration.next(NamingContextBindingsEnumeration.java:34)
at org.apache.catalina.mbeans.GlobalResourcesLifecycleListener.createMBeans(GlobalResourcesLifecycleListener.java:138)
at org.apache.catalina.mbeans.GlobalResourcesLifecycleListener.createMBeans(GlobalResourcesLifecycleListener.java:145)
at org.apache.catalina.mbeans.GlobalResourcesLifecycleListener.createMBeans(GlobalResourcesLifecycleListener.java:110)
at org.apache.catalina.mbeans.GlobalResourcesLifecycleListener.lifecycleEvent(GlobalResourcesLifecycleListener.java:82)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:402)
at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:347)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.startup.Catalina.start(Catalina.java:689)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:321)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:455)
Caused by: java.lang.ClassNotFoundException: myutil.hibernate.HibernateSessionFactoryTomcatFactory
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:80)
... 23 more
Jun 29, 2017 10:06:17 AM org.apache.tomcat.util.digester.Digester endElement
WARNUNG: No rules found matching 'Server/GlobalNamingResources/ResourceLink'.
Jun 29, 2017 10:06:17 AM org.apache.catalina.core.AprLifecycleListener init
INFORMATION: The APR based Apache Tomcat Native library which allows optimal
performance in production environments was not found on the java.library.path:
EDIT
What i have not mentioned, iam using OSGI equinox and a servlet bridge. everything that i have configured is right, the only thing i had to change in my case was to change my launch.ini i had:
osgi.parentClassloader=app
osgi.contextClassLoaderParent=app
changing it to
osgi.parentClassloader=app
osgi.contextClassLoaderParent=fwk <--- changed
here a link where i got my help from
also using java:/comp/env/jdbc/testDB using a slash before comp solved my problem
