Hi, What a coincidence! I was just wondering the same thing and started looking into what these can do for me...
It seems they provide various ways to get abstracted access to your model objects, in your apps (so you break the coupling between your apps and the components they use). Hmm... Anyway, here's an interesting article by Martin Fowler on the various strategies employed by the containers to break the coupling of components to apps: http://martinfowler.com/articles/injection.html Anyone else got thoughts to share? I can certainly use some more enlightment. :) Regards, Daniel On Wed, 17 Mar 2004, Gerry Duprey wrote: > Howdy, > > Assume for the sake of discussion that I'm trying to figure out why I might > want to use one of the above in a project. As I understand it, these all > basically provide what seems to me to be very simple services: > > - instantiate one or more instances of classes (services) I describe in an XML > config file > > - Provided named lookup services (i.e. give me an instance of whatever class I > bound to the text name "userManager") > > - Provide lifecycle management (which seems to mean creating the instances, > caching them, if appropriate, and whacking them it when no longer valid, all > along calling a set of methods to alert the object of what is happening to it). > > Again, this is a simple summary of what I believe these services provide. > > My question is: why are these services so important that there are multiple, > vigorously supported implementations and things like Turbine are being > rearchitected to support them? > > Sure, they seem useful services, but just not all that world shattering. In > fact, it seems pretty simple stuff (at least conceptually). I can see > projects being created without them (just instantiating classes as needed ad > such) just as easily, maybe more so. > > I'm not trying to denigrate these services - I just feel that the hoopla and > effort expended on them compared to what I understand they offer just doesn't > seem to add up. > > So, in summary, what am I missing here? Clearly something -- lots of smart > folks are using them. I'm hoping by explaining my likely incorrect vision of > what I'm seeing and asking for clarification, I may yet "see the light" on > them. :-) > > Thanks in advance! > > Gerry > > -- > Gerry Duprey > ________________________________________ > SchoolsOPEN, LLC > 123 North Ashley, Suite 120 > Ann Arbor, MI 48104 > Phone (877) 483-1944 Ext. 401 > Fax (734) 661-0819 > > Visit us Online at www.Schools-OPEN.com > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
