On Sat, Sep 20, 2014 at 11:19 PM, Chamila De Alwis <chami...@wso2.com> wrote:
> Hi, > > I'm in the process of writing the cartridge agent in Python. When > executing the extensions on tenant event listeners, specifically > SubscriptionDomainAddedEvent and SubscriptionDomainRemovedEvent, tenant > domain name should be passed as parameters. Currently CartridgeAgent gets > the tenant information from TenantManager which collects tenant information > through the event listener model in messaging. > > At this point, I'm stuck at how to get the tenant information for a given > tenant ID in Python Cartridge Agent. I could execute a REST call to get the > tenant details[1], but it will involve iterating through the list of > tenants provided. And, it is a deviation from the design the current agent > follows. > > Second option is to implement a message processing queue, which is the > approach in the Java cartridge agent, in Python and maintain a tenant > information context, which would hold all the tenants' details. > > Third option is to simply listen to the > TenantCreatedEvent/TenantSubscribedEvent and add the tenant data to a > tenant information context. The added information should also be removed at > a TenantRemovedEvent/TenantUnsubscribedEvent. > You may not get TenantCreate event, because cartridge may not exist at that time. Then you have to listen to full tenant event (which sending periodically) first and update tenant context. But IMO, if we can use metadata service to get tenant information, it would be the best. > > I'm inclined to follow the third approach, which is much more simpler, and > works naturally with the Paho mqtt library that is used for communication > in Python cartridge agent. WDYT? > > [1] - > https://cwiki.apache.org/confluence/display/STRATOS/4.0.0+Listing+Tenants > > Regards, > Chamila de Alwis > Software Engineer | WSO2 | +94772207163 > Blog: code.chamiladealwis.com > > > -- Lakmal Warusawithana Vice President, Apache Stratos Director - Cloud Architecture; WSO2 Inc. Mobile : +94714289692 Blog : http://lakmalsview.blogspot.com/
