User development, A new message was posted in the thread "Undemanding Dependencies":
http://community.jboss.org/message/521552#521552 Author : David Lloyd Profile : http://community.jboss.org/people/[email protected] Message: -------------------------------------------------------------- > mailto:[email protected] wrote: > > > mailto:[email protected] wrote: > > > > > mailto:[email protected] wrote: > > > > > > Editor, ate my post again. ;-) > > > > > > Following the last comment, I'm not sure you wouldn't want more fine > > > grained control on > > > which dependencies start your bean? > > > > > > <bean name="A" mode="On Demand"> > > > <property name="b"><inject bean="B" > > > transitive-start="true"/></property> > > > <bean> > > > > > > <bean name="B" mode="On Demand"/> > > Ah, that would be neat. Let me see if I can wrap my brain around that... > > > > So in this example, transitive-start would really mean that the targeted > > bean would control when this bean starts. So the question is, if you had > > two such injected bean properties, when would A start? When either > > injection is started, or only when both are? > You could make a configuration option, e.g. something like > > Require both dependencies to start: > > <bean name="A" mode="On Demand"> > <property name="b"><inject bean="B" > transitive-start="required"/></property> > <property name="c"><inject bean="C" > transitive-start="required"/></property> > <bean> > > Any one > > <bean name="A" mode="On Demand"> > <property name="b"><inject bean="B" > transitive-start="optional"/></property> > <property name="c"><inject bean="C" > transitive-start="optional"/></property> > <bean> > > > But unless starting A triggers some other knock-on effects, the second > example is likely to stall with a missing dependency anyway. ;-) > So I think you'd probably want all the dependencies marked transitive-start > anyway? The effect I'm envisioning for the latter case would run like this: 1. Something ("D") depending on C is started 2. This causes A to want to be demanded 3. A then demands that B start, since A has been demanded 4. A, B, and C are all started because D depended on C Not sure if that really makes sense in terms of use case though. Also (disclaimer!) I'm not sure that I'm using the term "demand" correctly in this context. -------------------------------------------------------------- To reply to this message visit the message page: http://community.jboss.org/message/521552#521552
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