Hey Mike! On 17/May/2010, at 4:24 PM, Mike Schrag wrote: > so here's your challenge ... make this fail with an optimistic lock exception > when EC2 saves (which is what would happen if EC1 was in another instance):
But that's the point... When an EO in your application changes, you are notified via the delegate! You don't have to wait until you try to saveChanges and get the exception. I agree with what others have posted recently on this topic, getting notified of a collision at the earliest point is much preferred! As to the rest of it, I think that you're making it way too complicated... My delegate works just fine at caching the changes and applying them later:
MarksDelegate.java
Description: Binary data
This is what I've used in the past (since ObjC days) and I don't know of a case where it fails. M. P.S. My run log looks like this (after the 100 objects are created): May 17 19:28:06 UseTheDelegate[49584] DEBUG NSLog - evaluateExpression: <com.webobjects.jdbcadaptor.MySQLPlugIn$MySQLExpression: "SELECT t0.id, RTRIM(t0.name) FROM Company t0" withBindings: > May 17 19:28:06 UseTheDelegate[49584] DEBUG NSLog - 100 row(s) processed May 17 19:28:06 UseTheDelegate[49584] DEBUG NSLog - === Commit Internal Transaction Application.Application: ec0 = er.extensions.eof.er...@7fd88db7 Application.Application: ec1 = er.extensions.eof.er...@524c71d2 Application.Application: ec2 = er.extensions.eof.er...@49198ff2 Application.Application: Company 98 Application.Application: Company 98 Application.Application: Company 98 C1 updated, not saved. Application.Application: Company 98 Application.Application: C1 1274149686265 Application.Application: Company 98 C2 updated, not saved. Application.Application: Company 98 Application.Application: C1 1274149686265 Application.Application: C2 1274149686265 May 17 19:28:06 UseTheDelegate[49584] DEBUG NSLog - === Begin Internal Transaction May 17 19:28:06 UseTheDelegate[49584] DEBUG NSLog - evaluateExpression: <com.webobjects.jdbcadaptor.MySQLPlugIn$MySQLExpression: "UPDATE Company SET name = ? WHERE (id = ? AND name = ?)" withBindings: 1:"C1 1274149686265"(name), 2:89(id), 3:"Company 98"(name)> May 17 19:28:06 UseTheDelegate[49584] DEBUG NSLog - === Commit Internal Transaction MarksDelegate.editingContext: er.extensions.eof.er...@49198ff2 shouldMergeChangesForObject: eo = <your.app.eo.Company 2d397e5c _EOIntegralKeyGlobalID[Company (java.lang.Integer)89]> MarksDelegate.editingContext: er.extensions.eof.er...@49198ff2 didMergeChanges: MarksDelegate.editingContext: er.extensions.eof.er...@7fd88db7 shouldInvalidateObject: eo = <your.app.eo.Company 51701bdc _EOIntegralKeyGlobalID[Company (java.lang.Integer)89]> MarksDelegate.editingContext: er.extensions.eof.er...@7fd88db7 didMergeChanges: MarksDelegate.editingContext: er.extensions.eof.er...@524c71d2 shouldInvalidateObject: eo = <your.app.eo.Company 1c2006a0 _EOIntegralKeyGlobalID[Company (java.lang.Integer)89]> MarksDelegate.editingContext: er.extensions.eof.er...@524c71d2 didMergeChanges: C1 saved. Application.Application: C1 1274149686265 Application.Application: C1 1274149686265 Application.Application: C2 1274149686265 May 17 19:28:06 UseTheDelegate[49584] DEBUG NSLog - === Begin Internal Transaction May 17 19:28:06 UseTheDelegate[49584] DEBUG NSLog - evaluateExpression: <com.webobjects.jdbcadaptor.MySQLPlugIn$MySQLExpression: "UPDATE Company SET name = ? WHERE (id = ? AND name = ?)" withBindings: 1:"C2 1274149686265"(name), 2:89(id), 3:"C1 1274149686265"(name)> May 17 19:28:06 UseTheDelegate[49584] DEBUG NSLog - === Commit Internal Transaction MarksDelegate.editingContext: er.extensions.eof.er...@524c71d2 shouldInvalidateObject: eo = <your.app.eo.Company 1c2006a0 _EOIntegralKeyGlobalID[Company (java.lang.Integer)89]> MarksDelegate.editingContext: er.extensions.eof.er...@524c71d2 didMergeChanges: MarksDelegate.editingContext: er.extensions.eof.er...@7fd88db7 shouldInvalidateObject: eo = <your.app.eo.Company 51701bdc _EOIntegralKeyGlobalID[Company (java.lang.Integer)89]> MarksDelegate.editingContext: er.extensions.eof.er...@7fd88db7 didMergeChanges: MarksDelegate.editingContext: er.extensions.eof.er...@49198ff2 shouldInvalidateObject: eo = <your.app.eo.Company 2d397e5c _EOIntegralKeyGlobalID[Company (java.lang.Integer)89]> MarksDelegate.editingContext: er.extensions.eof.er...@49198ff2 didMergeChanges: May 17 19:28:06 UseTheDelegate[49584] DEBUG NSLog - === Begin Internal Transaction May 17 19:28:06 UseTheDelegate[49584] DEBUG NSLog - evaluateExpression: <com.webobjects.jdbcadaptor.MySQLPlugIn$MySQLExpression: "SELECT t0.id, RTRIM(t0.name) FROM Company t0 WHERE t0.id = ?" withBindings: 1:89(id)> May 17 19:28:06 UseTheDelegate[49584] DEBUG NSLog - 1 row(s) processed May 17 19:28:06 UseTheDelegate[49584] DEBUG NSLog - === Commit Internal Transaction C2 saved. Application.Application: C2 1274149686265 Application.Application: C2 1274149686265 Application.Application: C2 1274149686265 May 17 19:28:06 UseTheDelegate[49584] DEBUG NSLog - The URL for webserver connect is: http://17.246.48.60/cgi-bin/WebObjects/UseTheDelegate.woa/-49584 The URL for direct connect is: http://17.246.48.60:49584/cgi-bin/WebObjects/UseTheDelegate.woa May 17 19:28:06 UseTheDelegate[49584] WARN NSLog - May 17 19:28:06 UseTheDelegate[49584] WARN er.extensions.appserver.ERXApplication - You are running in development mode with WOAutoOpenInBrowser = false. No browser will open and it will look like the application is hung, but it's not. There's just not a browser opening automatically. May 17 19:28:06 UseTheDelegate[49584] DEBUG NSLog - Waiting for requests...
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