Package org.apache.cassandra.index.sai.disk.v1.bitpack

Class AbstractBlockPackedWriter

java.lang.Object

org.apache.cassandra.index.sai.disk.v1.bitpack.AbstractBlockPackedWriter

Direct Known Subclasses:

BlockPackedWriter, MonotonicBlockPackedWriter

public abstract class AbstractBlockPackedWriter
extends Object

Modified copy of org.apache.lucene.util.packed.AbstractBlockPackedWriter to use DirectWriter for optimised reads that doesn't require seeking through the whole file to open a thread-exclusive reader.

Field Summary

Fields

Modifier and Type	Field	Description
protected int	blockIndex
protected final ResettableByteBuffersIndexOutput	blockMetaWriter
protected final long[]	blockValues
protected boolean	finished
protected final org.apache.lucene.store.IndexOutput	indexOutput

Method Summary

Modifier and Type	Method	Description
void	add(long l)	Append a new long.
long	finish()	Flush all buffered data to disk.
protected abstract void	flushBlock()

Methods inherited from class java.lang.Object

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

Field Details

indexOutput

protected final org.apache.lucene.store.IndexOutput indexOutput

blockValues

protected final long[] blockValues

blockMetaWriter

protected final ResettableByteBuffersIndexOutput blockMetaWriter

blockIndex

protected int blockIndex

finished

protected boolean finished

Method Details

add

public void add(long l)
         throws IOException

Append a new long.

Throws:

IOException

finish

public long finish()
            throws IOException

Flush all buffered data to disk. This instance is not usable anymore after this method has been called.

Returns:

a file offset to the block metadata

Throws:

IOException

flushBlock

protected abstract void flushBlock()
                            throws IOException

Throws:

IOException