Spring3 and EJB Integration(I)EJB Client

Spring3 and EJB Integration(I)EJB Client

I used EJB client to call EJB stateless bean, I found it is waste time to lookup the stateless bean every time.

So I tried to use spring to get singleton stub from EJB stateless bean.

The sample project are in easyaxis2proxy,easyrestproxy,easyjpa,easyejb.

We can configure that in Remote/Local way, you can choose that from comment/uncomment the codes I mentioned here.

1. Spring configuration file
local-ejb-context.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
">
<bean id="jndiTemplate"
class="org.springframework.jndi.JndiTemplate">
<property name="environment">
<props>
<prop key="java.naming.provider.url">
${java.naming.provider.url}
</prop>
<prop key="java.naming.factory.initial">
${java.naming.factory.initial}
</prop>
<prop key="java.naming.factory.url.pkgs">
${java.naming.factory.url.pkgs}
</prop>
</props>
</property>
</bean>
<bean id="userServiceLocal"
class="org.springframework.ejb.access.LocalStatelessSessionProxyFactoryBean">
<property name="jndiTemplate" ref="jndiTemplate" />
<property name="jndiName" value="easyejb/UserServiceLocal" />
<property name="businessInterface"
value="com.sillycat.core.webservice.interfaces.UserServiceLocal" />
</bean>
</beans>

remote-ejb-context.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
">

<bean id="jndiTemplate"
class="org.springframework.jndi.JndiTemplate">
<property name="environment">
<props>
<prop key="java.naming.provider.url">
${java.naming.provider.url}
</prop>
<prop key="java.naming.factory.initial">
${java.naming.factory.initial}
</prop>
<prop key="java.naming.factory.url.pkgs">
${java.naming.factory.url.pkgs}
</prop>
</props>
</property>
</bean>
<bean id="userServiceRemote" class="org.springframework.ejb.access.SimpleRemoteStatelessSessionProxyFactoryBean">
<property name="jndiTemplate" ref="jndiTemplate" />
<property name="jndiName" value="easyejb/UserService" />
<property name="businessInterface"
value="com.sillycat.core.webservice.interfaces.UserService" />
</bean>
</beans>

We can choose use Remote/Local from the main-context.xml
<import resource="classpath:resource-context.xml" />
<import resource="classpath:core-context.xml" />
<import resource="classpath:dao-context.xml" />
<import resource="classpath:manager-context.xml" />
<!--
<import resource="classpath:local-ejb-context.xml" />
<import resource="classpath:remote-ejb-context.xml" />
-->
<import resource="classpath:local-ejb-context.xml" />

<import resource="classpath:controller-easyrestproxy-context.xml" />
<import resource="classpath:restclient-context.xml" />

My manager spring configuration to call EJB
<bean id="personManager" class="com.sillycat.easyjpa.manager.PersonManagerImpl" >
<property name="personDAO" ref="personDAO" />
<!--
<property name="userServiceLocal" ref="userServiceLocal" />
<property name="userServiceRemote" ref="userServiceRemote" />
-->
<property name="userServiceLocal" ref="userServiceLocal" />
</bean>

2. The properties file config.properties:
###########################################
# EJB configuration
###########################################
java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
java.naming.provider.url=localhost:1099

3. My Manager java source:
package com.sillycat.easyjpa.manager;
import java.util.List;
import com.sillycat.core.webservice.interfaces.UserServiceLocal;
import com.sillycat.core.webservice.model.IUser;
import com.sillycat.easyjpa.dao.PersonDAO;
import com.sillycat.easyjpa.model.Person;
public class PersonManagerImpl implements PersonManager
{
PersonDAO personDAO;
UserServiceLocal userServiceLocal;
// UserService userServiceRemote;
public List<Person> getAll()
{
return personDAO.getAll();
}
public Person get(Integer id)
{
IUser iuser = userServiceLocal.get(Integer.valueOf(1));
// IUser iuser = userServiceRemote.get(Integer.valueOf(1));
Person p = personDAO.get(id);
p.setName(iuser.getEmail());
return p;
}
public void save(Person person)
{
if (person != null && person.getId() != null)
{
personDAO.update(person);
}
else
{
personDAO.insert(person);
}
}
public void updateName(Person person)
{
if (person != null && person.getId() != null)
{
personDAO.updateName(person.getName(), person.getId());
}
}
public void delete(Integer id)
{
personDAO.delete(id);
}
public void setPersonDAO(PersonDAO personDAO)
{
this.personDAO = personDAO;
}
// public void setUserServiceRemote(UserService userServiceRemote)
// {
// this.userServiceRemote = userServiceRemote;
// }
public void setUserServiceLocal(UserServiceLocal userServiceLocal)
{
this.userServiceLocal = userServiceLocal;
}
}

4. We can deploy these packages to JBOSS, and run the axis2 testcase or rest testcase to verify that.


references:
http://laoge1012.iteye.com/blog/772650
http://www.iteye.com/topic/24613
http://topic.youkuaiyun.com/u/20080111/13/c780b57b-3966-404b-9a81-e313fb7cd0ec.html