org.mmbase.datatypes.processors

Class DelayedSetter

java.lang.Object

org.mmbase.datatypes.processors.DelayedSetter

All Implemented Interfaces:

Serializable, Processor

public class DelayedSetter
extends Object
implements Processor

If you use a DelaySetter on a field, than the process of the field will make sure that the field is not actually changed (the original value is returned). In stead, the field is only scheduled for update. If another update for this field occurs, only this scheduled task is changed. This way, very many updates on this field, result in only few updates in the database.

Since:

MMBase-1.9

Version:

$Id$

Author:

Michiel Meeuwissen

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	DelayedSetter.NodeField
protected class	DelayedSetter.Setter
(package private) static class	DelayedSetter.SetThread

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static DelayQueue<DelayedSetter.Setter>	queue
(package private) static Map<DelayedSetter.NodeField,DelayedSetter.Setter>	queued

Constructor Summary

Constructors

Constructor and Description
DelayedSetter()

Method Summary

Modifier and Type	Method and Description
Object	process(Node node, Field field, Object value)
void	setDelay(long d)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

queue

static final DelayQueue<DelayedSetter.Setter> queue

queued

static Map<DelayedSetter.NodeField,DelayedSetter.Setter> queued

Constructor Detail

DelayedSetter

public DelayedSetter()

Method Detail

setDelay

public void setDelay(long d)

process

public final Object process(Node node,
                            Field field,
                            Object value)

Specified by:

process in interface Processor

Parameters:

node - The node object for which the field must be transformed.

field - The field which is set.

value - The (new) field value.

toString

public String toString()

Overrides:

toString in class Object