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WSO2 AppFactory - Using ESB Apptype

In next version of WSO2 AppFactory (2.2.0), it's going to introduce a new apptype ESB apptype. With this apptype, it's going allow users to develop WSO2 ESB Capps (CAR) with WSO2 AppFactory. In this article I will give you a guide line to follow when you are developing a Capp using WSO2 AppFactory.

WSO2 AppFactory ESB apptype is the first multi module apptype supported by it. It will contain 4 modules in the sample project. They are as below.

  1. Resources module
  2. Resources CAR module
  3. Synapse Config (Proxy Service) module
  4. Main Car module

Development

There are several rules that developer should obey when developing an ESB type application. Which are as follows.

  • Developers can add any number of modules to the project. But always there should only be two CAR modules. Which should be resources CAR and main CAR which will contain all synapse configs.
  • All synapse config names should contain the version number. Like foosequence-1.0.0. And the synapse config file name also should contain the version number in the same manner.
  • All modules should start with the application ID. This rule is not to conflict artifacts in between applications. If two applications contained artifacts in same name they could conflict.
  • Main Car module artifact id should be similar to the application ID.

It is recommended to use WSO2 Developer Studio to develop WSO2 AppFactory ESB type application. Developer Studio will validate the project structure and it will help developer to follow above rules. If some one is going to edit it by some other method, before accepting the commit it will check whether the required structure is there and will decide to accept it or reject it.

LifeCycle Management and Resources Management

When the ESB application is promoted it will still keep using the development endpoints / resources which is mentioned in the Resources CAR module. So the users in next stage (QA / DevOps) will need to update this resources CAR. So there will be an UI to upload a resources CAR for ESB applications. QAs and DevOps will need to checkout the code from the source code location which is mentioned in the Application Home page and they will need to edit registry resources and endpoints to match their endpoints and then they can build it and upload there Resources CAR so it will get deployed and main car will change it's endpoints to new ones.


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