[Andromda-user] [Spring cartridge] [EJB Stateful with Spring cartridge] EJB Stateful with Spring cartridge

[forum.andromda.org]

Hello,

The post  explains how to create Stateful services with the Spring cartridge. The patch was submitted on Jira : .

I need Stateful services with Spring only and also with EJB but this patch doesn't generate stateful session beans when EJB is enabled.

I have implemented EJB stateful as follow. What do you think of this solution ?

Thanks in advance.


0. Applying patch SPRING-131

1. namespace.xml
Add the property ejbStatefulSessionBeanBaseClass


    <property name="ejbStatefulSessionBeanBaseClass">
        <default>org.springframework.ejb.support.AbstractStatefulSessionBean</default>
        <documentation>
            Full name of stateful session bean base class for ejb wrapper.
        </documentation>
    </property>


2. cartridge.xml
Add the property reference ejbStatefulSessionBeanBaseClass


    <property reference="ejbStatefulSessionBeanBaseClass"/>


3. SpringSessionBean.vsl
Add the inherited class by service type

   
    #if ($springUtils.isStatefulServicesEnabled() && $service.isServiceTypeStateful())
        extends $ejbStatefulSessionBeanBaseClass
    #else
        extends $ejbSessionBeanBaseClass
    #end


Add attributes and getters/setters

   
    #if ($springUtils.isStatefulServicesEnabled() && $service.isServiceTypeStateful())
   
    #foreach ($attribute in $service.attributes)
        private $attribute.getterSetterTypeName $attribute.name#if ($attribute.defaultValuePresent) = $attribute.defaultValue#end;

        /**
    $attribute.getDocumentation("     * ")
         */
        public $attribute.getterSetterTypeName ${attribute.getterName}()
        {
            return this.${attribute.name};
        }

    ## - always have as public, having read-only causes too many issues when attempting to
    ##   use in other cartridges
        public void ${attribute.setterName}($attribute.getterSetterTypeName $attribute.name)
        {
            this.${attribute.name} = $attribute.name;
        }

    #end
    #end


Add methods for stateful EJB

   
    #if (!$service.abstract)
    #if ($springUtils.isStatefulServicesEnabled() && $service.isServiceTypeStateful())

        /**
         * EJB creation and deletion.
         */
        public void ejbCreate() throws javax.ejb.CreateException
        {
            load();
        }
       
        public void ejbPostCreate() throws javax.ejb.CreateException
        {
        }

    #if($service.attributes.size() > 0)
        public void ejbCreate(
    #foreach($attribute in $service.attributes)
            $attribute.type.fullyQualifiedName $attribute.name#if($velocityCount != $service.attributes.size()),#else)#end

    #end
            throws javax.ejb.CreateException
        {
    #foreach ($attribute in $service.attributes)
            this.${attribute.name} = ${attribute.name};
    #end
            load();
        }

        public void ejbPostCreate(
    #foreach($attribute in $service.attributes)
            $attribute.type.fullyQualifiedName $attribute.name#if($velocityCount != $service.attributes.size()),#else)#end

    #end
            throws javax.ejb.CreateException
        {
        }
    #end

        public void ejbRemove()
        {
        }

        /**
         * EJB activation and passivation.
         */
        public void ejbActivate()
        {
            load();
        }

        public void ejbPassivate()
        {
            unload();
        }
       
        /**
         * Load the Bean Factory and
         * instantiate the Spring Business Object.
         */
        private void load()
        {
            loadBeanFactory();
            this.${businessObject} = ($service.fullyQualifiedName)
                getBeanFactory().getBean("${service.beanName}");
        }
       
        /**
         * Unload the Bean Factory.
         */
        private void unload()
        {
            unloadBeanFactory();
            setBeanFactoryLocator(null);
        }
       
        private javax.ejb.SessionContext sessionContext;
    #else
        /**
         * Every Spring Session EJB needs to
         * call this to instantiate the Spring
         * Business Object.
         *
         * @see org.springframework.ejb.support.AbstractStatelessSessionBean#onEjbCreate()
         */
        protected void onEjbCreate()
        {
    #if($service.generalization && !$service.generalization.abstract)
            super.onEjbCreate();
    #end
            this.${businessObject} = ($service.fullyQualifiedName)
                getBeanFactory().getBean("${service.beanName}");
        }
    #end

    #set ($seeComment = "@see javax.ejb.SessionBean#setSessionContext(javax.ejb.SessionContext)")
        /**
         * Override default BeanFactoryLocator implementation to
         * provide singleton loading of the application context Bean factory.
         *
         * $seeComment
         */
        public void setSessionContext(javax.ejb.SessionContext sessionContext)
        {
            super.setSessionContext(sessionContext);
            super.setBeanFactoryLocator(
                org.springframework.context.access.ContextSingletonBeanFactoryLocator.getInstance("$beanRefFactory"));
            super.setBeanFactoryLocatorKey("$beanRefFactoryId");
           
    #if ($springUtils.isStatefulServicesEnabled() && $service.isServiceTypeStateful())
            this.sessionContext = sessionContext;
    #end
        }
    #end

   
4. SpringSessionLocalHome.vsl
Add create() method declaration with attributes

   
    #if ($springUtils.isStatefulServicesEnabled() && $service.isServiceTypeStateful())
    #if($service.attributes.size() > 0)
        public $service.fullyQualifiedLocalEjbName create(
    #foreach($attribute in $service.attributes)
            $attribute.type.fullyQualifiedName $attribute.name#if($velocityCount != $service.attributes.size()),#else)#end

    #end
            throws javax.ejb.CreateException;
    #end
    #end


5. SpringSessionRemoteHome.vsl
Add create() method declaration with attributes

   
    #if ($springUtils.isStatefulServicesEnabled() && $service.isServiceTypeStateful())
    #if($service.attributes.size() > 0)
        public $service.fullyQualifiedEjbName create(
    #foreach($attribute in $service.attributes)
            $attribute.type.fullyQualifiedName $attribute.name#if($velocityCount != $service.attributes.size()),#else)#end

    #end
            throws javax.ejb.CreateException, java.rmi.RemoteException;
    #end
    #end


6. ejb-jar.vsl
Add stateful session-type

   
    #if ($springUtils.isStatefulServicesEnabled() && $service.isServiceTypeStateful())
                <session-type>Stateful</session-type>
    #else
                <session-type>Stateless</session-type>
    #end

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