| java.lang.Object
 com.sleepycat.je.log.LogBufferPool
| LogBufferPool | | class LogBufferPool (Code) | | LogBufferPool keeps a set of log buffers.
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| getLogBufferSize | | final int getLogBufferSize()(Code) | | |
| getReadBuffer | | LogBuffer getReadBuffer(long lsn) throws DatabaseException(Code) | | Find a buffer that holds this LSN.
the buffer that contains this LSN, latched and ready toread, or return null. |
| getWriteBuffer | | LogBuffer getWriteBuffer(int sizeNeeded, boolean flippedFile) throws IOException, DatabaseException(Code) | | Get a log buffer for writing sizeNeeded bytes. If currentWriteBuffer is
too small or too full, flush currentWriteBuffer and get a new one.
Called within the log write latch.
a buffer that can hold sizeNeeded bytes. |
| reset | | void reset(DbConfigManager configManager) throws DatabaseException(Code) | | Initialize the pool at construction time and when the cache is resized.
This method is called after the memory budget has been calculated.
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| writeBufferToFile | | void writeBufferToFile(int sizeNeeded) throws IOException, DatabaseException(Code) | | Write the contents of the currentWriteBuffer to disk. Leave this buffer
in memory to be available to would be readers. Set up a new
currentWriteBuffer. Assumes the log write latch is held.
Parameters:
sizeNeeded - is the size of the next object we need to write tothe log. May be 0 if this is called on behalf of LogManager.flush(). |
| writeCompleted | | void writeCompleted(long lsn, boolean flushRequired) throws DatabaseException, IOException(Code) | | A loggable object has been freshly marshalled into the write log buffer.
1. Update buffer so it knows what LSNs it contains.
2. If this object requires a flush, write this buffer out to the
backing file.
Assumes log write latch is held.
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