+1 for the idea Lakmal! Yes I think it is better to have a call and discuss this before doing any changes.
Thanks On Wed, Feb 11, 2015 at 8:05 AM, Lakmal Warusawithana <lak...@wso2.com> wrote: > Hi Shaheed, > > Will try to explain further but simple and here some workaround solution. > > Previous release we only subscribe to a single cartridge with given > deployment policy. We have re used defined deployment policy. The main > reason that we cloud do, single cartridge has single deployment patten for > a particular deployment. > > If we come to composite application with multiple cartridges we have to > define deployment pattens for each and every cartridge in that composite > application. Defining deployment patten, have to use cartridge alias for > distinguish deferent cartridges because we can't use cartridge type, some > application may have multiple same cartridges and need different deployment > pattens. > > To address particular in your scenario, we can't have two implementation > whether is singleton or a composite group. Here one possible solution, I > believe we can implement, and which will cover your simple scenario as well. > > solution : > > - shall we allow to have global deployment policies (can have many) > which can pre deploy/add. (I will explain what is these global one) > - and will allow, in the defining the deployment policy time to > attached above without defining. (user has both option) > - then deploy the application > > I believed this is what you are looking for > > Let me explain these global deployment policy concept. We have section > call childPolicies which we refer different cartridge alias to define > deployment pattens. > > "childPolicies": [ > > { > > "alias": "mytomcat", > > "networkPartition": [ > > { > > "id": "network-partition-1", > > "partitionAlgo": "one-after-another", > > "partitions": [ > > { > > "id": "partition-1", > > "max": 5 > > } > > ] > > } > > ] > > } > > I like to propose, introduce section call globalPolicies which can define > global deployment pattens which going to apply for all cartridges defining > in that application. If it is single cartridge or not it will use same > deployment patten. > > With this implementation, without changing current design and > implementation we can achieved simple singleton scenario with attaching > same deployment policies without re defining per application > creation/deploy. > > Please share your thoughts > > > > On Wed, Feb 11, 2015 at 7:21 AM, Imesh Gunaratne <im...@apache.org> wrote: > >> Yes, I agree with your concerns Shaheed! Please find my comments below: >> >> On Wed, Feb 11, 2015 at 4:13 AM, Shaheed Haque <shahh...@cisco.com> >> wrote: >> >>> >>> >>> OK, I get that argument. But consider that multiple subscriptions all >>> using a single deployment spec was the previous model, and now we have >>> inverted that cardinality completely. >>> >> >>> >> Not exactly, we support multiple subscriptions for Multi-Tenant >> applications but not for Single-Tenant applications. This is again due to >> the reason I have explained in the previous response. May be we can improve >> this in a minor release. BTW the term Subscription has now being changed to >> Application SignUp. >> >>> >>> >> To my knowledge, in addition to the generic automation of single >>> cartridge subscriptions we provided our Stratos users, at least two users >>> have significant investment in dynamically generating and >>> subscribing/unsubscribing cartridges on-the-fly. Converting these to use >>> single application cartridges is necessary work needed to get to 4.1, but >>> all these usages will now require substantive rework to manage the opposite >>> cardinality w.r.t. deployment policies. >>> >> >>> >> Here we deploy an application in the context of Tenant not for User. Yes >> in this release it is not possible to share Single-Tenant applications >> accross tenants. However each tenant can deploy the same application with a >> different deployment policy by using a different application id. >> >> >>> I'm all in favour of progress, and change where unavoidable, but this >>> seems to gratuitously change the model for the bulk of singleton cartridge >>> users in favour of the currently non-existent grouping users. (And yes, I >>> am aware of the paradox that we are VERY interested in the grouping). >>> >> >> Yes I agree, may be we can have a separate discussion on this and propose >> improvements for the next minor release. >> >> Thanks >> > > > > -- > Lakmal Warusawithana > Vice President, Apache Stratos > Director - Cloud Architecture; WSO2 Inc. > Mobile : +94714289692 > Blog : http://lakmalsview.blogspot.com/ > > -- Imesh Gunaratne Technical Lead, WSO2 Committer & PMC Member, Apache Stratos