[Axis2] Improvements to Service life cycle in handling

[Chamil Thanthrimudalige <ch...@wso2.com>]

Forwarding with Axis2 prefix.

Best Regards,
Chamil Thanthrimudalige


Begin forwarded message:

> From: Deepal Jayasinghe <de...@opensource.lk>
> Date: September 14, 2006 11:54:39 PM GMT+06:00
> To: "axis-dev@ws.apache.org" <ax...@ws.apache.org>
> Subject: Improvements to Service life cycle in handling
> Reply-To: axis-dev@ws.apache.org
>
> Hi All;
>
> Currently we have an interface called Service and which has few  
> methods
> that are used to manage session (or else user can add those method  
> into
> service impl class w.o implementing the interface). And that interface
> has the following methods ;
>
> - startUp
> - init
> - setOperationContext
> - destroy
>
> Three of them are for managing service life cycle ;
> - init – will be called when the session start
> - setOperationContext – immediately before calling actual java method
> - destroy – will be call when the session finishes
>
> Remember all those method work if and only if you use Axis2 default
> message receiver or you code gen.
>
> The method startUp is not session related method , which is useful  
> when
> you want to initialize database connections , create thread etc ... at
> the time when you deploy the service. In the mean time interface name
> Service is bit confusing to me AFAIK it should be ServiceLifeCycle.  
> And
> having method like startUp in that interface confuses the users.
>
> So how about the following changes ;
> - Rename Service interface into ServiceLifeCycle
> - Then remove startUp method from that interface.
>
> There should be a some other interface (like Module interface) and  
> which
> should be optional as well , to have the method startUp. If someone  
> want
> to open DB connection or anything at the time of service deploying ,
> then he need to implement that interface (and for me which is  
> identical
> to Module interface). So with this change service element inside the
> services.xml will be change to following
>
> <service name=”foo” *class=”implementation class of the interface ”*>
> <parameter name="ServiceClass">ServiceClass</parameter>
> </service>
>
> Here the class attribute is optional , so if someone want to have
> loadonStartup feature then he need to implement the Service interface
> (new one) and put the impl name as the class attribute. This is very
> useful if your service implementation class is not java (if you are
> writing a groovy serice).
>
> So new Service interface will be look like follows;
> public interface Service{
> //will be called when service is deployed
> public void startUp(ConfigurationContext configctx, AxisService  
> service);
> //will be called when Axis2 server showdown or when service removed  
> from
> the system
> public void shutDown(ConfigurationContext configctx, AxisService  
> service);
> }
>
> And ServiceLifeCycle interface will look like below;
>
> public interface ServiceLifeCycle {
> public void init(ServiceContext sc);
> public void setOperationContext(OperationContext operationContext);
> void destroy(ServiceContext sc);
> }
>
>
> I am +1 on doing this for Axis2 1.1 :)
>
> Suggestions ........
>
> Thanks
> Deepal
>
>
>
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