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  1. EOF-Using EOF-The EOF Commandments

    Some things to avoid when working with EOF. Some of these things are contraindicated in Apple documentation, others are not. But all are things that experience shows EOF does not expect, and can lead to all sorts of trouble, including mysterious exceptions, and EOF getting confused about what changes must be saved
    DocumentationJul 07, 2013
  2. EOF-Using EOF-EOF Performance Tuning

    EOF Performance Tuning EOF does many nice things for you. But many people learn some things the hard way; like that a relational>object mapping library can … . There are other techniques as well; using the little lock attrubute in EOModeler to make many more items opaque (or non mutable) to EOF. EOF compares those
    DocumentationSep 03, 2007
  3. EOF-Using EOF-Breaking EOF

    of how this happens. It is not consistent . If you want to know the cause of these, go look in a mirror! EOF is not broken, you are abusing it and it is fighting back. Here is what to check: The EOF Commandments Context and Database Locking (wikidiscard > This information seems too specific and provides no context. I
    DocumentationOct 03, 2011
  4. EOF-Using EOF-Problems

    Problems This section describes some problems and bugs that sometimes occur when using Enterprise Objects Framework. EOF fails to initialize models when … Solution: I've finally found that this problem is related to the models load and initialization order. Most of the time, EOF is able to initialize a group
    DocumentationSep 03, 2007
  5. EOF-Using EOF-Common Pitfalls and Troubleshooting

    Missing Primary Key If you are subclassing across EO models and EOF is not generating a primary key in SQL when you insert your subclass (the result would be an integrity violation for a null primary key), then you have likely run into the annoying behavior of EOF when dealing with models that have SLIGHTLY different
    DocumentationSep 03, 2007
  6. EOF-Using EOF-EOF Best Practices

    Overview First, do no harm Read and obey The EOF Commandments before reading this. Creating EOEnterpriseObjects Rather than use MyEO eo = new MyEO … which has not been inserted into an EOEditingContext (see The EOF Commandments). Two, it supports the case where two or more entities in the EOModel(s
    DocumentationSep 03, 2007
  7. EOF-Using EOF-Optimistic Locking

    Overview Note that this section covers the locking strategy EOF uses at the databases layer as opposed to EOEditingContext locking which happens much higher … changes to the resources without an explicit lock, assuming success, and fails only if the changes actually cause a conflict. EOF takes the optimistic approach
    DocumentationSep 03, 2007
  8. EOF-Using EOF-Caching and Freshness

    understand that EOF is attempting to be efficient and not go to the database more often than neccesary — since a db transaction is relatively expensive. Every choice … . A chapter on OptimisticLockingTechniques in WO/EOF would be welcome, because effectively using optimistic locking (taking account both of values changed by other
    DocumentationMar 09, 2013
  9. EOF-Using EOF-Multiple Stacks or Instances

    Multiple EOF Stacks The problem is synchronzing multiple EOF stacks is essentially the same as synchronizing multiple instances of your WebObjects application … architectures where the database is the private store of one application (or a set of related applications built using the same technology WO/EOF in our case
    DocumentationJul 20, 2012
  10. EOF-Classes-Guide-MS.pdf

    coordinator Related to Subclass of parentObjectStore rootObjectStore EOF