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* MappedByteBuffer*Stream:Sven Gothel2014-10-031-4/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Validate active and GC'ed mapped-buffer count in cleanAllSlices() via close() .. - Fix missing unmapping last buffer in notifyLengthChangeImpl(), branch criteria was off by one. - cleanSlice(..) now also issues cleanBuffer(..) on the GC'ed entry, hence if WeakReference is still alive, enforce it's release. - cleanBuffer(..) reverts FLUSH_PRE_HARD -> FLUSH_PRE_SOFT in case of an error. - flush() -> flush(boolean metaData) to expose FileChannel.force(metaData). - Add synchronous mode, flushing/syncing the mapped buffers when in READ_WRITE mapping mode and issue FileChannel.force() if not READ_ONLY. Above is implemented via flush()/flushImpl(..) for buffers and FileChannel, as well as in syncSlice(..) for buffers only. flush*()/syncSlice() is covered by: - setLength() - notifyLengthChange*(..) - nextSlice() Always issue flushImpl() in close(). - Windows: Clean all buffers in setLength(), otherwise Windows will report: - Windows: Catch MappedByteBuffer.force() IOException - Optimization of position(..) position(..) is now standalone to allow issuing flushSlice(..) before gathering the new mapped buffer. This shall avoid one extra cache miss. Hence rename positionImpl(..) -> position2(..). - All MappedByteBufferOutputStream.write(..) methods issue syncSlice(..) on the last written current slice to ensure new 'synchronous' mode is honored. +++ Unit tests: - Ensure test files are being deleted - TestByteBufferCopyStream: Reduced test file size to more sensible values. -
* Bug 1080 - Refine MappedByteBuffer*Stream impl. and API [doc], adding stream ↵Sven Gothel2014-09-291-15/+169
| | | | to stream copy as well as direct memory mapped ByteBuffer access
* Bug 1080 - Add write support for memory mapped big file I/O via specialized ↵Sven Gothel2014-09-261-0/+156
OutputStream impl. Added MappedByteBufferOutputStream as a child instance of MappedByteBufferInputStream, since the latter already manages the file's mapped buffer slices. Current design is: - MappedByteBufferInputStream (parent) - MappedByteBufferOutputStream this is due to InputStream and OutputStream not being interfaces, but most functionality is provided in one class. We could redesign both as follows: - MappedByteBufferIOStream (parent) - MappedByteBufferInputStream - MappedByteBufferOutputStream This might visualize things better .. dunno whether its worth the extra redirection. +++ MappedByteBufferInputStream: - Adding [file] resize support via custom FileResizeOp - All construction happens via ctors - Handle refCount, incr. by ctor and getOutputStream(..), decr by close - Check whether stream is closed already -> IOException - Simplify / Reuse code MappedByteBufferOutputStream: - Adding simple write operations