Class ExceptionHandlerQueueThenThrowAfter
- All Implemented Interfaces:
CsvExceptionHandler
An exception handler that queues the first x exceptions, then throws any further exceptions.
Note: when testing this on systems with a high number of cores/threads under load we noted discrepancies between the number of exceptions counted and the number exceptions queued. If it is actually important to see the exceptions thrown then we would heavily recommend you use the single threaded iterator() in CsvToBean and collecting the exceptions yourself.
- Since:
- 5.2
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionDetermines how opencsv will handle exceptions that crop up during bean creation or writing.
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Field Details
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count
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maxExceptions
private final int maxExceptions
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Constructor Details
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ExceptionHandlerQueueThenThrowAfter
public ExceptionHandlerQueueThenThrowAfter(int maxExceptions) Creates an instance.- Parameters:
maxExceptions
- The number of exceptions that will be queued. Any exception handled after this limit will be thrown.
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Method Details
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handleException
Description copied from interface:CsvExceptionHandler
Determines how opencsv will handle exceptions that crop up during bean creation or writing. There are three ways of dealing with an exception:
- Ignore the exception. In this case, return
null
. - Queue the exception. In this case, return either the original exception thrown, or a new exception that meets your needs better.
- Halt processing by throwing the exception. In this case, throw the exception or a new exception that meets your needs better.
Please be cautioned: Due to the multi-threaded nature of opencsv's conversion routines, there is no guarantee that the exception thrown, if your chosen error handler throws exceptions, is the error in the input that would have caused the exception to be thrown if the input were processed in strict sequential order. That is, if there are four errors in the input and your error handler queues the first three but throws the fourth, the exception thrown might relate to any of the four errors in the input.
If your exception handler queues a certain number of exceptions before throwing one, opencsv makes a best-faith effort to make sure all of the exceptions marked for queueing are actually available via
CsvToBean.getCapturedExceptions()
orStatefulBeanToCsv.getCapturedExceptions()
after processing, but there are no absolute guarantees.This method must be thread-safe.
- Specified by:
handleException
in interfaceCsvExceptionHandler
- Parameters:
e
- The exception that was thrown- Returns:
- The exception to be queued, or
null
if the exception should be ignored - Throws:
CsvException
- If a halt to all processing is desired
- Ignore the exception. In this case, return
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