TransactionService and ServiceRegistry - Spring injection

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sergio

Hi all.

I need to write a Java package in order to manipulate Alfresco repository objects in custom ways. I am just creating a custom Java package and I want to have a reference to alfresco services (nodeService, …) inside my Java classes, so I am going to direct inject Alfresco beans into my classes. Because I need to manage all the task in a transactional way, I need a reference to TransactionService into my classes. I was thinking about direct injecting a TransactionService bean into my classes, but it failed.

My questions are the following:
1) how to direct inject TransactionService into my classes (if possible)?
2) Instead of TransactionService is it possible to direct inject the ServiceRegistry bean?

I followed the FirstFoundationClient example, but it creates a new ApplicationContext, on the contrary I want to use the ApplicationContext already created during the Alfresco boot.

I tried the write a Java bean and direct inject the TransactionComponent and the AuthenticationComponentImpl beans. My bean has an init() method as the following:

public void init ()
  {

    try {
         transactionService.getUserTransaction().begin();
      } catch (NotSupportedException e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
      } catch (SystemException e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
      }
      this.authenticationService.authenticate("admin", "admin".toCharArray());
  }

It works fine but I would like to know if this is the correct way to go on or not.

Many thanks to all.

Sergio

rwetherall

Hi Sergio,

Injecting the ServiceRegistry is a good idea as it gives you easy access to a number of fundamental services.

To inject the service your bean should look something like this …

package com.mystuff;

public MyBean
{
    private ServiceRegistry serviceRegistry;

   public void setServiceRegistry(ServiceRegistry serviceRegistry)
   {
      this.serviceRegistry = serviceRegistry;
   }

   ….

}
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

.. and the associated Spring config for the bean would look something like this …

…
   <bean id="myBean" class="com.mystuff.MyBean">
       <property name="serviceRegitry">
         <ref bean="ServiceRegistry"/>
       </property>
      
      …

    </bean>
…
‍‍‍‍‍‍‍‍‍‍‍‍

You wouldn't start a user transaction in the init method of bean since is a singleton instance and makes no sense.

Instead start and stop the user transactions in each method.  Use the TransactionUtil class to help with this.

Cheers,
Roy