On Thu, Nov 12, 2015 at 5:05 AM, Sagara Gunathunga <[email protected]> wrote:
> Use case
> --------------
> MS F/W should support at least two bean lifecycle methods so that one
> method get call during the service start-up while other one get call just
> before the service shutdown. We already have following use cases but this
> should be a much lengthy list when implementing real world use cases.
>
> 1) Service stat publishing - During the service start-up, it should be
> possible to initialize DAS agents and make connections, then during the
> service shutdown it should be possible to terminate DAS agents properly and
> close any connection remains.
>
How are we doing the above now with the metrics component?
>
> 2.) Metadata publishing - During the service start-up, it should be
> possible to publish service and endpoint metadata into a centralized
> metadata repository such as G-Reg and during the service shutdown it should
> be possible to remove/deactivate service or endpoint metadata on metadata
> repository.
>
> 3.) Handle connection establishment and termination for data sources such
> as RSBMS, LDAPs , legacy systems etc.
>
>
> Solution
> --------------
>
> Instead of introducing our own proprietary approaches we could use
> @PostConstruct[1] and @PreDestroy[2] annotations available with JDK.
> Users just need to annotate their init and termination methods as follows.
> Additionally this is a natural choice for those who familiar with
> JAX-WS/JAX-RS programming models where above annotation are used for same
> purpose.
>
> @PostConstruct
> public void init() {
> LOG.info("Helloworld :: calling PostConstruct method");
> }
>
> @PreDestroy
> public void close() {
> LOG.info("Helloworld :: calling PreDestroy method");
> }
>
>
> I have added above 2 annotation support to MS trunk, please refer
> following working sample[3].
>
>
> @IsuruP , since we have service lifecycle support now, we need to refactor
> your analytics sample to use proper annotations and it will become a real
> world sample as well, [3] is too simple to demonstrate real world use
> cases.
>
>
> [1] -
> https://docs.oracle.com/javaee/5/api/javax/annotation/PostConstruct.html
> [2] -
> https://docs.oracle.com/javaee/5/api/javax/annotation/PreDestroy.html
> [3] - https://github.com/wso2/product-mss/tree/master/samples/lifecycle
>
>
> Thanks !
> --
> Sagara Gunathunga
>
> Architect; WSO2, Inc.; http://wso2.com
> V.P Apache Web Services; http://ws.apache.org/
> Linkedin; http://www.linkedin.com/in/ssagara
> Blog ; http://ssagara.blogspot.com
>
>
--
*Afkham Azeez*
Director of Architecture; WSO2, Inc.; http://wso2.com
Member; Apache Software Foundation; http://www.apache.org/
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