me.prettyprint.cassandra.service.template
Class SuperCfUpdater<K,SN,N>

java.lang.Object
  me.prettyprint.cassandra.service.template.AbstractTemplateUpdater<K,N>
      me.prettyprint.cassandra.service.template.SuperCfUpdater<K,SN,N>

Type Parameters:

K - the key's data type

SN - the standard or super column's data type

N - the child column name type in a super column

V - the object instance to persist

public class SuperCfUpdater<K,SN,N>
extends AbstractTemplateUpdater<K,N>

This provides an interface of updating a specified row, most likely with the contents of an object. This would likely by implemented as an anonymous inner class with access to a final object in scope. It would update the given row with the object's data. This is currently implemented as an abstract base class instead of an interface. This could change in the future. Being an abstract base class allows CassandraTemplate to initialize this instance through package scope field access. This means that implementation of update() simply makes consecutive calls to various set****() methods which already have the contextual information they need to update the correct row. The downside of this approach is that the updater is essentially stateful and cannot be used concurrently. The alternative is to pass an object in to update() as a parameter with the setter methods, leaving the updater to be stateless.

Since:

Mar 10, 2011

Author:

david

Field Summary

protected SuperCfTemplate<K,SN,N>

template

Fields inherited from class me.prettyprint.cassandra.service.template.AbstractTemplateUpdater

columnFactory, keyPos, keys, mutator

Constructor Summary

SuperCfUpdater(SuperCfTemplate<K,SN,N> sTemplate, ColumnFactory columnFactory)

Method Summary

SuperCfUpdater<K,SN,N>	addKey(K key)
SuperCfUpdater<K,SN,N>	addSuperColumn(SN sColumnName)
void	deleteSubColumn(N columnName)
void	deleteSuperColumn() Deletes the super column and all of its sub columns
SN	getCurrentSuperColumn()
void	setBoolean(N subColumnName, Boolean value)
void	setByteArray(N subColumnName, byte[] value)
void	setByteBuffer(N subColumnName, ByteBuffer value)
void	setDate(N subColumnName, Date value)
void	setDouble(N subColumnName, Double value)
void	setInteger(N subColumnName, Integer value)
void	setLong(N subColumnName, Long value)
void	setString(N subColumnName, String value)
void	setUUID(N subColumnName, UUID value)
<V> void	setValue(N subColumnName, V value, Serializer<V> serializer)

Methods inherited from class me.prettyprint.cassandra.service.template.AbstractTemplateUpdater

getCurrentKey, getCurrentMutator, update

Methods inherited from class java.lang.Object

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

Field Detail

template

protected SuperCfTemplate<K,SN,N> template

Constructor Detail

SuperCfUpdater

public SuperCfUpdater(SuperCfTemplate<K,SN,N> sTemplate,
                      ColumnFactory columnFactory)

Method Detail

addKey

public SuperCfUpdater<K,SN,N> addKey(K key)

Overrides:

addKey in class AbstractTemplateUpdater<K,N>

addSuperColumn

public SuperCfUpdater<K,SN,N> addSuperColumn(SN sColumnName)

getCurrentSuperColumn

public SN getCurrentSuperColumn()

deleteSuperColumn

public void deleteSuperColumn()

Deletes the super column and all of its sub columns

deleteSubColumn

public void deleteSubColumn(N columnName)

setString

public void setString(N subColumnName,
                      String value)

setUUID

public void setUUID(N subColumnName,
                    UUID value)

setLong

public void setLong(N subColumnName,
                    Long value)

setInteger

public void setInteger(N subColumnName,
                       Integer value)

setBoolean

public void setBoolean(N subColumnName,
                       Boolean value)

setByteArray

public void setByteArray(N subColumnName,
                         byte[] value)

setByteBuffer

public void setByteBuffer(N subColumnName,
                          ByteBuffer value)

setDate

public void setDate(N subColumnName,
                    Date value)

setDouble

public void setDouble(N subColumnName,
                      Double value)

setValue

public <V> void setValue(N subColumnName,
                         V value,
                         Serializer<V> serializer)