Re: Injecting registry services to POJOS

Raul Raja Martinez Sun, 04 Dec 2005 02:21:01 -0800

Hi , thanks for the help,
I have the following error when using the <invoke-factory>
as you suggested:


Attribute 'object' is required but no value was provided.


Shing Hing Man wrote:

  <create-instance

class="com.estudiowebs.CMS.DAO.GlobalMenu">
    <!-- set-service not allowed here -->
    <set-service property="entityService"
service-id="EntityService" />
   </create-instance>


Instead of create-instance, have you tried
invoke-factory ?
<invoke-factory>
 <construct
class="com.estudiowebs.CMS.DAO.GlobalMenu">
  <set-service property="entityService"
      service-id="EntityService" />
 </construct>
</invoke-factory>

Shing






--- Raul Raja Martinez <[EMAIL PROTECTED]>
wrote:

Here is a little bit more code about my problem:

I'm trying to inject a service in one of mi POJO
that is an applicationscope object in my Tapestry App.
I tried many things and now I'm trying the following
but it doesn't workeither.
<contribution

configuration-id="tapestry.state.ApplicationObjects">

  <state-object name="GlobalMenu"
scope="application">
   <create-instance
class="com.estudiowebs.CMS.DAO.GlobalMenu">
    <!-- set-service not allowed here -->
    <set-service property="entityService"
service-id="EntityService" />
   </create-instance>
</state-object>
</contribution>


public class GlobalMenu extends Menu implements
IGlobalMenuDAO {

   private static final long serialVersionUID = 1L;
        
   private EntityService entityService;
        
   public void setEntityService(EntityService
entityService) {
        this.entityService = entityService;
   }
        
   public GlobalMenu() {
        Menu m = null;
        m = (Menu) entityService.load(Menu.class, new
Integer(1));
   }

}

I'd like to know what would be the right way to
inject a service in a pojo.


Thanks

Raul.



Raul Raja Martinez wrote:

I am using the hivemind utilities Hibernate3

session as in

http://hivetranse.sourceforge.net/quickstart.html#start.config.hibernate3

I can inject it in my regular servlets using the

following:


EntityService service =

(EntityService)HiveMindFilter

.getRegistry(request)

.getService(com.estudiowebs.CMS.services.EntityService.class);


I can aslo inject it into components and pages

using annotations such as

@InjectObject(service:...).

but when it comes to Pojos I didn't know what

would be the right

approach, I'll try your method, thanks.

Raul.





Jesse Kuhnert wrote:

Ummm....You can get access to the Registry

object, but it's not easy, and

for a good reason.

~Anything~ in tapestry can have a hivemind

service injected into it.

Esp a
hivemind service, or a DAO, which is what you are

doing right? I

don't know
what all of your crazy configs are doing, but I

have a hibernate hivemind

service point that looks sort of like:

<service-point id="SessionProxy"

interface="org.hibernate.Session">

...//threaded
</service>

I then take this hibernate session, bound to my

web thread(or POJO

service
thread, or JMS queue thread, or whatever other

fun threads I want to

use :)
),  and use it without thinking. Sometimes it's

in pages/components, but

most often I create a simple DAO that might look

like:

<service-point id="SomeDAO" >
<construct class="com.foo.SomeDAOImpl">
<set-service id="SessionProxy" property="session"

/>

</construct>
</service>

Something like that.. Is this what you're doing?
On 12/4/05, Raul Raja Martinez

<[EMAIL PROTECTED]> wrote:

Hi Jean-Francois, first of all thanks for your

help,

My pojo is basicaly the menu of my webapp, since

everybody will have the

same I thought that the best thing would be to

make it an application

scope object and fetch the records at startup.

since i have already

declared a Hibernate Session service I wanted to

inject that service

into this object so that I could use it to query

the objects.

I have also many webservices in the same webapp

that are not tapestry

related and I'd like to use these services both

in the tapestry and

servlets.

I think this is or would be a common problem for

Tapestry 4 users.

Many have already asked how to access the

Tapestry hivemind registry

from other objects that are not of type

Component or Page. My problem is

that I don't even know if this is posible since

someone mentioned in

this newsgroup that the Tapestry hivemind

registry wasn't available

directly and also annotations like @InjectObject

only work within pages

or components.

Anyway, I'll try your solution,
Is there a newsgroup for Hivemind utilities?

Thanks,

Raul.


Jean-Francois Poilpret wrote:

Hi Raul,

I do not know Tapestry, but I know HiveUtils (I

wrote it;-)), the

contribution you describe below seems OK to me

(at first sight).

However it depends exactly on what you want to

achieve.

In particular is your POJO a singleton in your

application, or do you

need

to inject a new instance every time? From your

initial Tapestry

example,

believe it is a singleton, so when using

HiveUtils, you should probably

put

the "cache" attribute to true to make sure

HiveUtils will not create

more

than one instance:

<contribution

configuration-id="hiveutils.ObjectBuilderObjects">

<object name="globalMenu" cached="true"
class="com.estudiowebs.CMS.DAO.GlobalMenu">
  <inject

object="service:com.estudiowebs.CMS.services.EntityService"

/>

=== message truncated ===


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Re: Injecting registry services to POJOS

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