Re: [jakartaee-platform-dev] Question about meaning of `initialize-in-or

["Kevin Sutter" <sutter@xxxxxxxxxx>]

Scott,
I think the original
purpose of <initialize-in-order>was to provide order where none was previously defined.  The module
initialization was (and still is) undefined back in Java EE 5/6 days.  By
introducing this element, the user has some control over the ordering of
the module initialization for their application.  A common usage was
to initialize some database tables with an early initialized module and
then these would be ready for use by the later modules.

Since it's defined
by the spec, I bet most (all?) of the major implementations provide this
functionality.  But, since these implementations also most likely
provide their own deployment mechanisms, they probably also provide other
mechanisms to control the ordering of module initialization.  Does
the TCK have tests for this element?

---------------------------------------------------
Kevin Sutter 
STSM, Jakarta EE and MicroProfile architect @ IBM
e-mail:  sutter@xxxxxxxxxx     Twitter:  @kwsutter
phone: tl-553-3620 (office), 507-253-3620 (office)    
LinkedIn: https://www.linkedin.com/in/kevinwsutter

Part-time schedule: Tue, Wed, Thu (off on Mon and Fri)



From:
       "Scott
Marlow" <smarlow@xxxxxxxxxx>
To:
       "jakartaee-platform
developer discussions" <jakartaee-platform-dev@xxxxxxxxxxx>
Date:
       08/03/2021
15:59
Subject:
       [EXTERNAL]
[jakartaee-platform-dev] Question about meaning of `initialize-in-order`
when application deployment may be multi-threaded...
Sent
by:        "jakartaee-platform-dev"
<jakartaee-platform-dev-bounces@xxxxxxxxxxx>

---

Hi,
I am trying to understand the original
purpose of `initialize-in-order` [1] which seems likely to be implementation
specific.  It is pretty clearly written to assume that top/sub modules
are deployed in a specific ordering that the user specifies but there are
no Jakarta EE Platform requirements that a single deployment thread is
used, so its not really clear how [1] should be accomplished when multiple
threads are used for deployment.
Do any EE implementations that handle
deployment via multiple threads also support `initialize-in-order` [1]
controlling the order that the multiple threads deploy each (sub)module
in? 
Scott 
[1] https://jakarta.ee/specifications/platform/8/platform-spec-8.html#a3201_______________________________________________
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