Package org.apache.cayenne.access
Interface OperationObserver
- All Superinterfaces:
- OperationHints
- All Known Implementing Classes:
- DefaultOperationObserver,- DoNothingOperationObserver,- IteratedSelectObserver
public interface OperationObserver extends OperationHints
Defines a set of callback methods that allow 
QueryEngine to pass back query
 results and notify caller about exceptions.- 
Method SummaryModifier and Type Method Description voidnextBatchCount(Query query, int[] resultCount)Callback method invoked after a batch update is executed.voidnextCount(Query query, int resultCount)Callback method invoked after an updating query is executed.voidnextGeneratedRows(Query query, ResultIterator<?> keys, ObjectId idToUpdate)Callback method invoked after each batch of generated values is read during an update.voidnextGlobalException(Exception ex)Callback method invoked on exceptions that are not tied to a specific query execution, such as JDBC connection exceptions, etc.voidnextQueryException(Query query, Exception ex)Callback method invoked on exceptions that happen during an execution of a specific query.voidnextRows(Query query, List<?> dataRows)Callback method invoked for each processed ResultSet.voidnextRows(Query q, ResultIterator<?> it)Callback method invoked for each opened ResultIterator.Methods inherited from interface org.apache.cayenne.access.OperationHintsisIteratedResult
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Method Details- 
nextCountCallback method invoked after an updating query is executed.
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nextBatchCountCallback method invoked after a batch update is executed.
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nextRowsCallback method invoked for each processed ResultSet.- Since:
- 3.0
 
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nextRowsCallback method invoked for each opened ResultIterator. If this observer requested results to be returned as a ResultIterator, this method is invoked instead ofnextRows(Query, List).- Since:
- 3.0
 
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nextGeneratedRowsCallback method invoked after each batch of generated values is read during an update.- Since:
- 4.0
 
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nextQueryExceptionCallback method invoked on exceptions that happen during an execution of a specific query.
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nextGlobalExceptionCallback method invoked on exceptions that are not tied to a specific query execution, such as JDBC connection exceptions, etc.
 
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