On Tuesday, August 23, 2016, Chathura Ekanayake <[email protected]> wrote:
> Hi Rushmin, > > Can't we maintain a cache of domain objects, may be in a data holder > instance? > Yes, using a cache with a data holder instance would be appropriate for this problem. Do we know how frequently these data sets get updated in the database? Thanks > BTW, what are the attributes of an example domain object (e.g. webapp > object)? > > - Chathura > > On Mon, Aug 22, 2016 at 11:54 AM, Rushmin Fernando <[email protected] > <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: > >> Hi Isuru, any comment on this ? :-) >> >> On Thu, Aug 18, 2016 at 10:54 AM, Rushmin Fernando <[email protected] >> <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: >> >>> It depends on the applications, users invoke Isuru. >>> >>> If users invoke all the apps then we end up fetching all the apps by the >>> handler instances for the apps (synapse APIs). ( A handler instance only >>> fetched and stores only one app instance) >>> >>> In the current implementation the fetch happens on demand. >>> >>> >>> On Thu, Aug 18, 2016 at 9:18 AM, Isuru Udana <[email protected] >>> <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: >>> >>>> Hi Rushmin, >>>> >>>> Do we need to fetch domain objects from the database for all the >>>> applications or is it only for a set of applications ? >>>> >>>> >>>> >>>> On Tue, Aug 16, 2016 at 1:35 PM, Rushmin Fernando <[email protected] >>>> <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: >>>> >>>>> >>>>> In App Manager we use carbon mediation engine as the gateway. Thus the >>>>> business logic is implemented in few handlers. >>>>> >>>>> In order to code business logic, we need to fetch domain objects from >>>>> the database via a service. The primary domain object the "webapp' object. >>>>> >>>>> (Please see the attached image) >>>>> >>>>> In the current implementation, we have made the webapp object, an >>>>> instance variable of the handlers. Since the handlers are instantiated per >>>>> API (represents an app in our case), this works fine. >>>>> >>>>> Upon the first call to the app, we fetch the relevant webapp object >>>>> and store it as the aforementioned instance variable. >>>>> >>>>> Since there are more than one handlers which need to deal with the >>>>> webapp object we need to do above step in each of those handlers. >>>>> >>>>> We are thinking of having an init handler which does the service call >>>>> and fetch the domain object and share it with the other handlers in the >>>>> chain. The purspose of evaluating this is to, increase the code >>>>> maintainability and improve the performance to some extent. >>>>> >>>>> In order to do that we need to have the domain object in the message >>>>> context. But then again consume a lot of memory when there is a high load. >>>>> >>>>> One solution to above issue to create a new thin domain object with >>>>> only the necessary fields for the gateway. >>>>> >>>>> Thoughts please ? >>>>> >>>>> >>>>> >>>>> -- >>>>> *Best Regards* >>>>> >>>>> *Rushmin Fernando* >>>>> *Technical Lead* >>>>> >>>>> WSO2 Inc. <http://wso2.com/> - Lean . Enterprise . Middleware >>>>> >>>>> mobile : +94772891266 >>>>> >>>>> >>>>> >>>> >>>> >>>> -- >>>> *Isuru Udana* >>>> Technical Lead >>>> WSO2 Inc.; http://wso2.com >>>> email: [email protected] >>>> <javascript:_e(%7B%7D,'cvml','[email protected]');> cell: +94 77 3791887 >>>> blog: http://mytecheye.blogspot.com/ >>>> >>> >>> >>> >>> -- >>> *Best Regards* >>> >>> *Rushmin Fernando* >>> *Technical Lead* >>> >>> WSO2 Inc. <http://wso2.com/> - Lean . Enterprise . Middleware >>> >>> mobile : +94772891266 >>> >>> >>> >> >> >> -- >> *Best Regards* >> >> *Rushmin Fernando* >> *Technical Lead* >> >> WSO2 Inc. <http://wso2.com/> - Lean . Enterprise . Middleware >> >> mobile : +94772891266 >> >> >> >> _______________________________________________ >> Architecture mailing list >> [email protected] >> <javascript:_e(%7B%7D,'cvml','[email protected]');> >> https://mail.wso2.org/cgi-bin/mailman/listinfo/architecture >> >> > -- *Imesh Gunaratne* Software Architect WSO2 Inc: http://wso2.com T: +94 11 214 5345 M: +94 77 374 2057 W: https://medium.com/@imesh TW: @imesh lean. enterprise. middleware
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