Let me thank you again -- it seems it works great!
One small glitch though: before I get the exception in catch() and can process
it, someone up there (looks like the frontbase JDBC adaptor) logs out heaps and
heaps of things, which start with
===
20:56:06.567 ERROR Missing EOFailedAdaptorOperationKey or
EOFailedDatabaseOperationKey in
com.webobjects.eoaccess.EOGeneralAdaptorException: EvaluateExpression failed:
<com.webobjects.jdbcadaptor.FrontbasePlugIn$FrontbaseExpression: "INSERT INTO
"T_DF_FIELD"("C_TEMPLATE_ID", "C_CONTENT_DATA", "C_TYPE", "C_UID", "C_TITLE",
"C_DESCRIPTION", "C_LOCKED", "C_ORDER", "C_CREATION_DATE", "C_IDENTIFIER")
VALUES (100, NULL, 'DFListField', 119, 'EditorsUpravují', 'Selected user roles
can create/edit users through this prototypeVybrané uživatelské role mohou
upravovat uživatele podle tohoto vzoru', NULL, 9, TIMESTAMP '2014-11-25
20:56:03.358', 'userRoleEditors')" withBindings: >:
Next exception:SQL State:23 subclass = 00 -- error code: 358 -- msg:
Exception condition 358. Integrity constraint violation (PRIMARY KEY,
T_DF_FIELD._C70(C_UID=119)).
Next exception:SQL State:40 subclass = 00 -- error code: 363 -- msg:
Exception condition 363. Transaction rollback.: {EOAdaptorOperationsKey = (
{_exception = Exception condition 358. Integrity constraint violation (PRIMARY
KEY, T_DF_FIELD._C70(C_UID=119)).at
com.frontbase.jdbc.FBJErrorMetaData.errorMessageAtIndex(FBJErrorMetaData.java:162)
at
com.frontbase.jdbc.FBJErrorMetaData.getExceptionChain(FBJErrorMetaData.java:194)
at com.frontbase.jdbc.FBJStatement.checkMetaData(FBJStatement.java:472)
at com.frontbase.jdbc.FBJStatement.execute(FBJStatement.java:185)
at
com.webobjects.jdbcadaptor.JDBCChannel._bindInputVariablesWithBindingsAndExecute(JDBCChannel.java:272)
at
com.webobjects.jdbcadaptor.JDBCChannel._evaluateExpression(JDBCChannel.java:337)
...
...
===
and go on for a long long time.
Is there a way to suppress this log? Not only it clutters the log files, but
it's long enough to make the application perceptibly slower.
Thanks a lot,
OC
On 25. 11. 2014, at 19:11, Chuck Hill <[email protected]> wrote:
>> (b) concurrent inserts
>>
>> This problem is caused by my using fixed PKs (though if I did not, I might
>> be getting duplicated EOs instead). If two instances try to insert a new EO
>> with the same PK, I'm (naturally) getting a constraint PK violation
>> exception from the database.
>>
>> And I can't find a way to solve it :(
>>
>> I can (and do) try to fetch the offending object -- and since the other
>> instance committed meantime, I get it all right:
>>
>> ===
>> ... code as above ...
>> if (ocs_is_primary_key_constraint(exception) &&
>> adaptorOp.adaptorOperator()==EODatabaseOperation.AdaptorInsertOperator) {
>> NSArray pka=entity.primaryKeyAttributes()
>> EOQualifier
>> pkq=ERXEOAccessUtilities.qualifierFromAttributes(pka,adaptorOp.changedValues())
>> // contains the PK
>> EOFetchSpecification fs=new EOFetchSpecification(entityName,pkq,null)
>> fs.setRefreshesRefetchedObjects(YES)
>> NSArray objs=ec.objectsWithFetchSpecification(fs)
>> if (objs.count()==1) {
>> // OK, my code does get here, the object inserted by other instance is
>> fetched all right. But what now?!?
>> ???
>> _saveTolerantlyChangesInEC(ec) // let's try again
>> ... ...
>> ===
>>
>> What to do at the ??? place? If I do nothing, the insert operation stays in
>> EC and fails again.
>>
>> I've tried to remove the newly added object from ec.insertedObjects.
>> Strangely enough it did work (i.e., it has been removed -- self evidently,
>> internally insertedObjects is a mutable array), but did not help -- this way
>> led to the dreaded "rowDiffsForAttributes: snapshot in
>> com.webobjects.eoaccess.EODatabaseOperation {_dbSnapshot = {}; ..."
>> exceptions.
>>
>> Currently I am recording the PK and entity, and in my
>> databaseContextWillOrderAdaptorOperations I do not add adaptor operation for
>> such an insert. This seems to sort of work, but is TERRIBLY convoluted --
>> there must be a better solution?
>>
> Set the relationships for any other objects into the EC to the one fetched,
> not the one just created and then ec.deleteObject(dupicate object))
>
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