org.apache.cassandra.db.compaction
Class PrecompactedRow

java.lang.Object
  org.apache.cassandra.db.compaction.AbstractCompactedRow
      org.apache.cassandra.db.compaction.PrecompactedRow

public class PrecompactedRow
extends AbstractCompactedRow

PrecompactedRow merges its rows in its constructor in memory.

Field Summary

Fields inherited from class org.apache.cassandra.db.compaction.AbstractCompactedRow

key

Constructor Summary

PrecompactedRow(CompactionController controller, java.util.List<SSTableIdentityIterator> rows)

PrecompactedRow(DecoratedKey<?> key, ColumnFamily compacted)

PrecompactedRow(DecoratedKey<?> key, CompactionController controller, ColumnFamily cf)
it is caller's responsibility to call removeDeleted + removeOldShards from the cf before calling this constructor

Method Summary

int	columnCount()
ColumnFamily	getFullColumnFamily()
boolean	isEmpty()
long	maxTimestamp()
static ColumnFamily	removeDeletedAndOldShards(boolean shouldPurge, CompactionController controller, ColumnFamily cf)
static ColumnFamily	removeDeletedAndOldShards(DecoratedKey<?> key, CompactionController controller, ColumnFamily cf)
void	update(java.security.MessageDigest digest) update @param digest with the data bytes of the row (not including row key or row size).
long	write(java.io.DataOutput out) write the row (size + column index + filter + column data, but NOT row key) to @param out.

Methods inherited from class java.lang.Object

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

Constructor Detail

PrecompactedRow

public PrecompactedRow(DecoratedKey<?> key,
                       ColumnFamily compacted)

PrecompactedRow

public PrecompactedRow(DecoratedKey<?> key,
                       CompactionController controller,
                       ColumnFamily cf)

it is caller's responsibility to call removeDeleted + removeOldShards from the cf before calling this constructor

PrecompactedRow

public PrecompactedRow(CompactionController controller,
                       java.util.List<SSTableIdentityIterator> rows)

Method Detail

removeDeletedAndOldShards

public static ColumnFamily removeDeletedAndOldShards(DecoratedKey<?> key,
                                                     CompactionController controller,
                                                     ColumnFamily cf)

removeDeletedAndOldShards

public static ColumnFamily removeDeletedAndOldShards(boolean shouldPurge,
                                                     CompactionController controller,
                                                     ColumnFamily cf)

write

public long write(java.io.DataOutput out)
           throws java.io.IOException

Description copied from class: AbstractCompactedRow

write the row (size + column index + filter + column data, but NOT row key) to @param out. It is an error to call this if isEmpty is false. (Because the key is appended first, so we'd have an incomplete row written.) write() may change internal state; it is NOT valid to call write() or update() a second time.

Specified by:

write in class AbstractCompactedRow

Throws:

java.io.IOException

update

public void update(java.security.MessageDigest digest)

Description copied from class: AbstractCompactedRow

update @param digest with the data bytes of the row (not including row key or row size). May be called even if empty. update() may change internal state; it is NOT valid to call write() or update() a second time.

Specified by:

update in class AbstractCompactedRow

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in class AbstractCompactedRow

Returns:

true if there are no columns in the row AND there are no row-level tombstones to be preserved

columnCount

public int columnCount()

Specified by:

columnCount in class AbstractCompactedRow

Returns:

the number of columns in the row

maxTimestamp

public long maxTimestamp()

Specified by:

maxTimestamp in class AbstractCompactedRow

Returns:

the max column timestamp in the row

getFullColumnFamily

public ColumnFamily getFullColumnFamily()
                                 throws java.io.IOException

Returns:

the full column family represented by this compacted row. We do not provide this method for other AbstractCompactedRow, because this fits the whole row into memory and don't make sense for those other implementations.

Throws:

java.io.IOException