org.apache.cassandra.db
Class EchoedRow

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

public class EchoedRow
extends AbstractCompactedRow

A CompactedRow implementation that just echos the original row bytes without deserializing. Currently only used by cleanup.

Field Summary

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

key

Constructor Summary

EchoedRow(SSTableIdentityIterator row)

Method Summary

int	columnCount()
boolean	isEmpty()
long	maxTimestamp()
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

EchoedRow

public EchoedRow(SSTableIdentityIterator row)

Method Detail

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 or Long.MIN_VALUE if computing this value would require extra effort we're not willing to make.