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https://issues.apache.org/jira/browse/IO-92?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michele Mazzucco updated IO-92:
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Attachment: DeferredPeriodicOutputStreamTest.java
DeferredPeriodicOutputStream.java
I've updated the class because of a bug which happens when one tries to write a
chunk of data (altogether) which is bigger than the threshold. In this case the
"temporary" arrays grows, while it shouldn't.
I've fixed the problem by overriding the write(byte[] b) and write(byte[] b,
int off, int len) methods.
p.s. I've implemented also a version which uses a ByteBuffer attached to a
FileChannel, but I've found out that it generally performs worst.
> Add DeferredPeriodicOutputStream
> --------------------------------
>
> Key: IO-92
> URL: https://issues.apache.org/jira/browse/IO-92
> Project: Commons IO
> Issue Type: New Feature
> Components: Streams/Writers
> Environment: Windows XP SP2, jdk 1.5
> Reporter: Michele Mazzucco
> Fix For: 1.4
>
> Attachments: DeferredPeriodicOutputStream.java,
> DeferredPeriodicOutputStream.java, DeferredPeriodicOutputStream.java,
> DeferredPeriodicOutputStreamTest.java, DeferredPeriodicOutputStreamTest.java,
> DeferredPeriodicOutputStreamTest.java
>
>
> I've extended the ThresholdingOutputStream class with a new class which
> behaves different from DeferredFileOutputStream:
> - when the stream is closed, the content stored in memory is *always* flushed
> to disk (in DeferredFileOutputStream, instead, if the treshold
> is not reached data is lost)
> - DeferredFileOutputStream maintains data in memory only until the treshold
> value has been reached, then it immediately writes every byte
> to disk. This new implementation, instead, caches treshold bytes in memory,
> and every time that value is reached (that is, treshold, 2 * threshold, etc),
> it flushes data to disk. In other words it acts as a cache.
> - It implements the java.io.DataOutput interface, that is, it provides
> utility methods to write all primitive types (e.g. short, byte, char, int,
> float, long, double and String in different formats)
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