Package org.apache.cayenne.access.util

Class DefaultOperationObserver

java.lang.Object

org.apache.cayenne.access.util.DefaultOperationObserver

All Implemented Interfaces:

OperationHints, OperationObserver

Direct Known Subclasses:

IteratedSelectObserver

public class DefaultOperationObserver
extends Object
implements OperationObserver

Simple implementation of OperationObserver interface. Useful as a superclass of other implementations of OperationObserver. This implementation only tracks transaction events and exceptions.

This operation observer is unsafe to use in application, since it doesn't rethrow the exceptions immediately, and may cause the database to hang.

Field Summary

Fields

Modifier and Type	Field	Description
protected List<Throwable>	globalExceptions
protected Map<Query,Throwable>	queryExceptions

Constructor Summary

Constructors

Constructor	Description
DefaultOperationObserver()

Method Summary

Modifier and Type	Method	Description
List<Throwable>	getGlobalExceptions()	Returns a list of global exceptions that occured during data operation run.
Map<Query,Throwable>	getQueryExceptions()	Returns a list of exceptions that occured during data operation run by query.
boolean	hasExceptions()	Returns true if at least one exception was registered during query execution.
boolean	isIteratedResult()	Returns false.
void	nextBatchCount(Query query, int[] resultCount)	Callback method invoked after a batch update is executed.
void	nextCount(Query query, int resultCount)	Callback method invoked after an updating query is executed.
void	nextGeneratedRows(Query query, ResultIterator<?> keys, List<ObjectId> idsToUpdate)	Closes ResultIterator without reading its data.
void	nextGlobalException(Exception ex)	Callback method invoked on exceptions that are not tied to a specific query execution, such as JDBC connection exceptions, etc.
void	nextQueryException(Query query, Exception ex)	Callback method invoked on exceptions that happen during an execution of a specific query.
void	nextRows(Query query, List<?> dataRows)	Callback method invoked for each processed ResultSet.
void	nextRows(Query query, ResultIterator it)	Closes ResultIterator without reading its data.
void	printExceptions(PrintWriter out)	Prints the information about query and global exceptions.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.cayenne.access.OperationObserver

nextGeneratedRows

Field Details

globalExceptions

protected List<Throwable> globalExceptions

queryExceptions

protected Map<Query,Throwable> queryExceptions

Constructor Details

DefaultOperationObserver

public DefaultOperationObserver()

Method Details

printExceptions

public void printExceptions(PrintWriter out)

Prints the information about query and global exceptions.

getGlobalExceptions

public List<Throwable> getGlobalExceptions()

Returns a list of global exceptions that occured during data operation run.

getQueryExceptions

public Map<Query,Throwable> getQueryExceptions()

Returns a list of exceptions that occured during data operation run by query.

hasExceptions

public boolean hasExceptions()

Returns true if at least one exception was registered during query execution.

nextCount

public void nextCount(Query query,
 int resultCount)

Description copied from interface: OperationObserver

Callback method invoked after an updating query is executed.

Specified by:

nextCount in interface OperationObserver

nextBatchCount

public void nextBatchCount(Query query,
 int[] resultCount)

Description copied from interface: OperationObserver

Callback method invoked after a batch update is executed.

Specified by:

nextBatchCount in interface OperationObserver

nextRows

public void nextRows(Query query,
 List<?> dataRows)

Description copied from interface: OperationObserver

Callback method invoked for each processed ResultSet.

Specified by:

nextRows in interface OperationObserver

nextRows

public void nextRows(Query query,
 ResultIterator it)

Closes ResultIterator without reading its data. If you implement a custom subclass, only call super if closing the iterator is what you need.

Specified by:

nextRows in interface OperationObserver

nextGeneratedRows

public void nextGeneratedRows(Query query,
 ResultIterator<?> keys,
 List<ObjectId> idsToUpdate)

Closes ResultIterator without reading its data. If you implement a custom subclass, only call super if closing the iterator is what you need.

Specified by:

nextGeneratedRows in interface OperationObserver

Since:

4.0

nextQueryException

public void nextQueryException(Query query,
 Exception ex)

Description copied from interface: OperationObserver

Callback method invoked on exceptions that happen during an execution of a specific query.

Specified by:

nextQueryException in interface OperationObserver

nextGlobalException

public void nextGlobalException(Exception ex)

Description copied from interface: OperationObserver

Callback method invoked on exceptions that are not tied to a specific query execution, such as JDBC connection exceptions, etc.

Specified by:

nextGlobalException in interface OperationObserver

isIteratedResult

public boolean isIteratedResult()

Returns false.

Specified by:

isIteratedResult in interface OperationHints