Short answer -
Often the service layer proxies the gateway, but not always.
Also, there is no reason a archive layer couldn't communicate to multiple
gateways and/or services.
Mark
Sent from my mobile doohickey.
On Jan 4, 2012 11:46 AM, Gavin Baumanis beauecli...@gmail.com wrote:
Hi Everyone,
I was recently chatting at work about how we might go about architecting a
new application.
I suggested that we have;
Objects,
Service Managers
and Gateways.
Whereby the ServiceManager is the public API for the gateway.
Then I got asked , Why?
I explained that it was good practice to separate out the plublic API from
the gateway and gave the example of changing database providers.
Eg. Swapping from MS-SQL server to PostGreSQL.
With my architecture proposal, you only need to change the gateway
(perhaps some minor tweaks to the ServiceManager CFCs.
So far so goo... Until I got asked Why again.
You still need to change the code somewhere for the new database flavour.
What is the ServiceManager doing for us, it seems like a redundant
duplication of code?
Subsequently, I have been thinking about it more - and can't come up with
a good reason.
I could be doing it completely wrong...
But for the most part, my Service layer becomes a duplicate of the Gateway.
* Ensure we have the required arguments for the gateway,
* Call the gateway functions, using the supplied arguments
* Return exactly the gateway's return value(s) to the consumer.
99.9% of the time the arguments are exactly the same,
The data / structure (whatever) that is returned from the gateway, is
returned unaltered to the consumer, too.
For the very small number of times that I might do some data
transformation (in the ServiceManager) before it is returned... well I
could simply create THAT method in my gateway and have;
* Call the this.GETTER method
* Transform the data as required
* Return the transformed data
So am I missing something? Or have I just talked myself out of the
requirement for (perhaps, excluding web-services) of ever needing to have a
separate service layer to a Gateway CFC?
Gavin.
--
You received this message because you are subscribed to the Google Groups
cfaussie group.
To view this discussion on the web visit
https://groups.google.com/d/msg/cfaussie/-/TMMO_W0Au4gJ.
To post to this group, send email to cfaussie@googlegroups.com.
To unsubscribe from this group, send email to
cfaussie+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/cfaussie?hl=en.
--
You received this message because you are subscribed to the Google Groups
cfaussie group.
To post to this group, send email to cfaussie@googlegroups.com.
To unsubscribe from this group, send email to
cfaussie+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/cfaussie?hl=en.