com.streambase.liveview.client

Class TupleUpdatedEvent

java.lang.Object

java.util.EventObject

com.streambase.liveview.client.AbstractQueryEvent

com.streambase.liveview.client.AbstractTupleEvent

com.streambase.liveview.client.TupleUpdatedEvent

All Implemented Interfaces:

Serializable

public final class TupleUpdatedEvent
extends AbstractTupleEvent

The event dispatched when an existing Tuple is updated. The method TupleUpdatedEvent.getOld() will return null unless the event was propagated from a LiveResult. The LiveResult will propagate the old tuple since it maintains a local copy of all tuples in the query result.

See Also:

Serialized Form

Field Summary

Fields inherited from class com.streambase.liveview.client.AbstractTupleEvent

keyData, tuple

Fields inherited from class java.util.EventObject

source

Constructor Summary

Constructors

Constructor and Description
TupleUpdatedEvent(Object source, Long key, Tuple oldTuple, Tuple newTuple, List<Schema.Field> changedFields) Deprecated.
TupleUpdatedEvent(Object source, Long oldKey, Tuple oldTuple, Tuple newTuple, Tuple keyData, List<Schema.Field> changedFields, List<com.streambase.liveview.client.internal.TupleFieldComparator> fieldComparators)

Method Summary

Modifier and Type	Method and Description
void	dispatch(QueryListener listener) Dispatches this event to the listener
List<Schema.Field>	getChangedFields() Retrieve a list of the fields that changed in this update
Tuple	getOld() Retrieve the old version of the tuple.
boolean	hasOld() See if the old tuple was included in this event

Methods inherited from class com.streambase.liveview.client.AbstractTupleEvent

getKey, getKeyValue, getTuple

Methods inherited from class java.util.EventObject

getSource, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

TupleUpdatedEvent

public TupleUpdatedEvent(Object source,
                         Long key,
                         Tuple oldTuple,
                         Tuple newTuple,
                         List<Schema.Field> changedFields)

Deprecated.

Parameters:

source - the source of the event

key - the unique key of the tuple

oldTuple - the old tuple (may be null)

newTuple - the updated tuple

changedFields - the list of changed fields

TupleUpdatedEvent

public TupleUpdatedEvent(Object source,
                         Long oldKey,
                         Tuple oldTuple,
                         Tuple newTuple,
                         Tuple keyData,
                         List<Schema.Field> changedFields,
                         List<com.streambase.liveview.client.internal.TupleFieldComparator> fieldComparators)

Parameters:

source - the source of the event

oldKey - the unique key of the tuple

oldTuple - the old tuple (may be null)

newTuple - the updated tuple

keyData - The data for the full key. May be null only if oldKey is not 0.

changedFields - the list of changed fields

fieldComparators - The pre-built set of comparators for comparing complex keys. May be null only if oldKey is not 0.

Method Detail

getOld

public Tuple getOld()

Retrieve the old version of the tuple. This will return null in all cases unless it is being propagated from a LiveResult

Returns:

The old tuple

hasOld

public boolean hasOld()

See if the old tuple was included in this event

Returns:

true if old tuple is not null

getChangedFields

public List<Schema.Field> getChangedFields()

Retrieve a list of the fields that changed in this update

Returns:

field list of changed fields

dispatch

public void dispatch(QueryListener listener)

Dispatches this event to the listener

Specified by:

dispatch in class AbstractQueryEvent

Parameters:

listener - the query listener