Re: Sharing an EO model between applications... ?

Subject: Re: Sharing an EO model between applications... ?
From: Chuck Hill <email@hidden>
Date: Wed, 23 Jul 2014 00:29:58 +0000
Thread-topic: Sharing an EO model between applications... ?

Hi Chris,

The word you are looking for is “framework”. Put the model and EO classes and anything else you want shared in a framework project and include that in the two application projects.

http://wiki.wocommunity.org/display/documentation/Development-Frameworks

http://wiki.wocommunity.org/display/WEB/Your+First+Framework

http://wiki.wocommunity.org/display/documentation/Add+a+Framework+Dependency

As for locking… do you run more than one instance of your application now? If so, you should not run into any new problems. If not, it is possible that your code is relying on there being only one process updating the database and that a second app could result in optimistic locking failures that you will need to now handle and will result in data freshness concerns that you will need to accommodate.

http://wiki.wocommunity.org/display/documentation/EOF-Using+EOF-Optimistic+Locking

http://wiki.wocommunity.org/display/documentation/EOF-Using+EOF-Concurrency

http://wiki.wocommunity.org/display/documentation/EOF-Using+EOF-Problems

http://wiki.wocommunity.org/display/documentation/EOF-Using+EOF-Caching+and+Freshness

Chuck

Chuck Hill

Executive Managing Partner, VP Development and Technical Services

Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.

http://www.global-village.net/gvc/practical_webobjects

Global Village Consulting ranks 13th in 2012 in BIV's Top 100 Fastest Growing Companies in B.C!

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On 2014-07-22, 5:03 PM, "Chris Klein/IcontactWeb" wrote:

Folks,

I have a webobjects application that I want to split into two

separate applications: one to do slow, batch-oriented tasks; the

second to manage simple, fast user queries.

Ideally, the two applications would exchange data through a

database using a common EO model. However, I have no idea

whether the WO runtime provides any kind of concurrency/locking

protection for this scenario.

I have a rudimentary understanding of locking, but this is way

beyond my understanding, and I haven't found any hints on-line.

Any help, including a pointer to somewhere that this may have

already have been answered, would be greatly appreciated.

WebObjects 5.3.3

OS X 10.4.11

XCode 2.4.1

(I know, old-timey)

Thanks in advance.

Chris Klein

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	>Sharing an EO model between applications... ? (From: Chris Klein/IcontactWeb <email@hidden>)

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