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From: hivemind-cvs@jakarta.apache.org
To: hivemind-cvs@jakarta.apache.org
Subject: 
 =?iso-8859-1?q?=5BJakarta_HiveMind_Wiki=5D_New=3A__FrequentlyAskedQuestio?=
 =?iso-8859-1?q?ns?=
Date: Mon, 21 Jun 2004 14:55:03 -0000
Message-ID: <20040621145503.91553.51197@minotaur.apache.org>

   Date: 2004-06-21T07:55:02
   Editor: 200.63.136.102 <>
   Wiki: Jakarta HiveMind Wiki
   Page: FrequentlyAskedQuestions
   URL: http://wiki.apache.org/jakarta-hivemind/FrequentlyAskedQuestions

   no comment

New Page:

=3D Frequently Asked Questions =3D

This page will eventually become the !HiveMind FAQ.  The idea is that peopl=
e ask questions and that other !HiveMind users and developers respond and c=
omment until a "accepted solution" is reached.  Eventually we will be able =
to compile a list of questions and accepted solutions into a more official =
FAQ for the !HiveMind website.


Q. (DanielFeist 21/06/2004)  =


''(Maybe this is a ChangeProposal rather than a question.  That depends on =
the answer  ...  lets wait and see and possibly move it is it doesn't belon=
g here)''

Is there anyway to inject a service, using the BuilderFactory, with an obje=
ct obtained by invoking a method of another service.  I can think of many c=
ases were this would be very useful but it doesn't seem to be possible.  Co=
ncrete examples are as follows:

'Example 1':  I have a Mailer service which depends on, and uses, a datasou=
rce to obtain email address.  This datasource is to be obtained via JNDI so=
 i decide to use the NameLookup service to obtain the datasource.  As the d=
atasource is not a service but rather the result from executing a lookup me=
thod of a service it seems i am limited from injecting it into my Mailer se=
rvice through declarative configuration in the hivemodule.sdl.

'Example 2':  I have a Mailer service which uses a Properties to obtain ema=
il address.  The backing store of the properties has to be flexible and con=
figurable so i decide to create a !PropertyFactory service that returns a P=
roperties object for a given locator and whose backing store is defined and=
 configured through a configuration point.  This is a good solution to my p=
roblem but as in example 1 I cannot inject this properties into my Mailer S=
ervice.

On a side note: If this type of injection is possible then a clean solution=
 to my change proposal ModuleResourcesProposal is very simple.   Resources =
would be created using a factory specifically designed to do this (much lik=
e the BeanFactory) which would also manage backing-store type and synchroni=
zation issues.  These resources could then be injected into services by usi=
ng ResourceFactory's get method to obtain the resource.

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