org.apache.cassandra.io.sstable

Class AbstractSSTableSimpleWriter

java.lang.Object

org.apache.cassandra.io.sstable.AbstractSSTableSimpleWriter

Direct Known Subclasses:

SSTableSimpleUnsortedWriter, SSTableSimpleWriter

public abstract class AbstractSSTableSimpleWriter
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
protected ColumnFamily	columnFamily
protected CounterId	counterid
protected DecoratedKey	currentKey
protected java.nio.ByteBuffer	currentSuperColumn
protected java.io.File	directory
protected CFMetaData	metadata

Constructor Summary

Constructors

Constructor and Description
AbstractSSTableSimpleWriter(java.io.File directory, CFMetaData metadata, IPartitioner partitioner)

Method Summary

Methods

Modifier and Type	Method and Description
void	addColumn(java.nio.ByteBuffer name, java.nio.ByteBuffer value, long timestamp) Insert a new "regular" column to the current row (and super column if applicable).
void	addCounterColumn(java.nio.ByteBuffer name, long value) Insert a new counter column to the current row (and super column if applicable).
void	addExpiringColumn(java.nio.ByteBuffer name, java.nio.ByteBuffer value, long timestamp, int ttl, long expirationTimestampMS) Insert a new expiring column to the current row (and super column if applicable).
abstract void	close() Close this writer.
protected abstract ColumnFamily	getColumnFamily()
protected SSTableWriter	getWriter()
protected static java.lang.String	makeFilename(java.io.File directory, java.lang.String keyspace, java.lang.String columnFamily)
void	newRow(java.nio.ByteBuffer key) Start a new row whose key is key.
void	newSuperColumn(java.nio.ByteBuffer name) Start a new super column with name name.
protected abstract void	writeRow(DecoratedKey key, ColumnFamily columnFamily)

Methods inherited from class java.lang.Object

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

Field Detail

directory

protected final java.io.File directory

metadata

protected final CFMetaData metadata

currentKey

protected DecoratedKey currentKey

columnFamily

protected ColumnFamily columnFamily

currentSuperColumn

protected java.nio.ByteBuffer currentSuperColumn

counterid

protected final CounterId counterid

Constructor Detail

AbstractSSTableSimpleWriter

public AbstractSSTableSimpleWriter(java.io.File directory,
                           CFMetaData metadata,
                           IPartitioner partitioner)

Method Detail

getWriter

protected SSTableWriter getWriter()

makeFilename

protected static java.lang.String makeFilename(java.io.File directory,
                            java.lang.String keyspace,
                            java.lang.String columnFamily)

newRow

public void newRow(java.nio.ByteBuffer key)
            throws java.io.IOException

Start a new row whose key is key.

Parameters:

key - the row key

Throws:

java.io.IOException

newSuperColumn

public void newSuperColumn(java.nio.ByteBuffer name)

Start a new super column with name name.

Parameters:

name - the name for the super column

addColumn

public void addColumn(java.nio.ByteBuffer name,
             java.nio.ByteBuffer value,
             long timestamp)

Insert a new "regular" column to the current row (and super column if applicable).

Parameters:

name - the column name

value - the column value

timestamp - the column timestamp

addExpiringColumn

public void addExpiringColumn(java.nio.ByteBuffer name,
                     java.nio.ByteBuffer value,
                     long timestamp,
                     int ttl,
                     long expirationTimestampMS)

Insert a new expiring column to the current row (and super column if applicable).

Parameters:

name - the column name

value - the column value

timestamp - the column timestamp

ttl - the column time to live in seconds

expirationTimestampMS - the local expiration timestamp in milliseconds. This is the server time timestamp used for actually expiring the column, and as a consequence should be synchronized with the cassandra servers time. If timestamp represents the insertion time in microseconds (which is not required), this should be (timestamp / 1000) + (ttl * 1000).

addCounterColumn

public void addCounterColumn(java.nio.ByteBuffer name,
                    long value)

Insert a new counter column to the current row (and super column if applicable).

Parameters:

name - the column name

value - the value of the counter

close

public abstract void close()
                    throws java.io.IOException

Close this writer. This method should be called, otherwise the produced sstables are not guaranteed to be complete (and won't be in practice).

Throws:

java.io.IOException

writeRow

protected abstract void writeRow(DecoratedKey key,
            ColumnFamily columnFamily)
                          throws java.io.IOException

Throws:

java.io.IOException

getColumnFamily

protected abstract ColumnFamily getColumnFamily()