MessageBatch

Paket	mx.data
Klass	public class MessageBatch
Arv	MessageBatch EventDispatcher Object
Implementerar	IExternalizable

Språkversion:

ActionScript 3.0

Produktversion:

Adobe Digital Enterprise Platform Data Services for Java EE 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Represents a group of changes: creates, updates, deletes, and update collection messages. There is always at least one open batch accessible via the DataStore.currentBatch property. Changes you make such as property changes detected automatically through data binding, createItem(), updateItem(), or deleteItem() operations are stored in this batch. The current list of uncommitted batches is stored in the uncommittedBatches property. You call createBatch create a new batch which is added to the end of the list. This batch is automatically made the currentBatch. You can commit or revert the set of a changes a batch at a time - in both cases, the batch is automatically removed from the uncommittedBatches list.

When there are dependencies between changes, you should commit and revert changes in order - i.e. commit the oldest batch in the list (uncommittedBatches[0]) and revert the most recent batch - uncommittedBatches[uncommittedBatches.length - 1].

The commitRequired property is set to true when there are any changes in the batch (i.e. items.length > 0). The items property stores the set of DataMessages in this batch.

You can store custom information in a MessageBatch via the properties property. Batches are saved/restored each time you use the saveCache method or automatically when autoSaveCache is true when using the offline feature.

Each batch also has a DataMessage associated with it in the batchMessage property. If you need to communicate information with the server (and you are sending the batch message to the server) you can store info in the headers of this message.

Publika egenskaper

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	Egenskap		Definieras med
		batchMessage : DataMessage This is the data message used to represent the batch being sent to the server.	MessageBatch
		commitRequired : Boolean [skrivskyddad] True if any changes are in this batch.	MessageBatch
		constructor : Object En referens till klassobjektet eller konstruktorfunktionen för en given objektinstans.	Object
		properties : Object = null An optional set of user defined properties you can set for this batch.	MessageBatch

Publika metoder

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	Metod		Definieras med
		MessageBatch() Constructor.	MessageBatch
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void Registrerar ett händelseavlyssnarobjekt för ett EventDispatcher-objekt så att avlyssnaren får meddelanden om händelser.	EventDispatcher
		commit(itemsOrCollections:Array = null, cascadeCommit:Boolean = false):mx.rpc:AsyncToken Commits the changes in the batch.	MessageBatch
		commitRequiredOn(item:Object):Boolean Indicates if there are pending changes for this particular item.	MessageBatch
		dispatchEvent(event:Event):Boolean Skickar en händelse till händelseflödet.	EventDispatcher
		getMessage(messageId:String):DataMessage Returns the message with the given id.	MessageBatch
		hasEventListener(type:String):Boolean Kontrollerar om EventDispatcher-objektet har några avlyssnare registrerade för en viss typ av händelse.	EventDispatcher
		hasOwnProperty(name:String):Boolean Anger om det finns en egenskap angiven för ett objekt.	Object
		isPrototypeOf(theClass:Object):Boolean Anger om en instans av klassen Object finns i prototypkedjan för objektet som anges som parameter.	Object
		propertyIsEnumerable(name:String):Boolean Anger om den angivna egenskapen finns och är uppräkningsbar.	Object
		readExternal(input:IDataInput):void This method deserializes the message batch.	MessageBatch
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Tar bort en avlyssnare från EventDispatcher-objektet.	EventDispatcher
		removeMessage(msg:DataMessage):void Removes the specified message from this batch.	MessageBatch
		revertChanges(item:IManaged = null):Boolean Reverts the changes for this batch, either all changes if no item is supplied, or just the changes for the specified item if it is supplied.	MessageBatch
		revertChangesForCollection(collection:ListCollectionView):Boolean Reverts the changes for all items in the specified managed collection.	MessageBatch
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Anger tillgänglighet för en dynamisk egenskap för slingåtgärder.	Object
		toLocaleString():String Returnerar det här objektets strängrepresentation, formaterad i enlighet med språkspecifika konventioner.	Object
		toString():String [åsidosätt] Returns a String representation of this object.	MessageBatch
		valueOf():Object Returnerar det angivna objektets primitiva värde.	Object
		willTrigger(type:String):Boolean Kontrollerar om en händelseavlyssnare är registrerad för det här EventDispatcher-objektet eller något av dess överordnade objekt för den angivna händelsetypen.	EventDispatcher
		writeExternal(output:IDataOutput):void This method serializes the batch with the following stucture: numberOfElements:int - this is the total number of elements serialized [repeated element (once for every message in the batch)] destination:String - the destination of the associated DataService uid:String - the UID of the associated item message:DataMessage - the message for the associated change Because the message currently contains a copy of the item we don't have to serialize the message in a special way.	MessageBatch

Händelser

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	Händelse		Sammanfattning	Definieras med
		activate	[utsändningshändelse] Skickas när Flash Player eller AIR får operativsystemfokus och blir aktivt.	EventDispatcher
		deactivate	[utsändningshändelse] Skickas när Flash Player eller AIR förlorar operativsystemfokus och blir inaktivt.	EventDispatcher

Publika konstanter

	Konstant		Definieras med
		items : ArrayCollection This stores the list of MessageCacheItem instances which represent the changes in the batch.	MessageBatch

Egenskapsdetaljer

Konstruktordetaljer

Metoddetaljer

Konstantdetaljer

Juridiska meddelanden | Onlinesekretesspolicy

MessageBatch - AS3 ADEP Data Services

Paketx

Språkelement

Bilagor

Paket mx.data

batchMessage

commitRequired

properties

commit

commitRequiredOn

getMessage

readExternal

removeMessage

revertChanges

revertChangesForCollection

toString

writeExternal

items

	`itemsOrCollections:Array` (default = `null`) — If you want to commit only some of the changes in the batch, you can commit changes for an item at a time or a collection of items at a time by setting the `itemsOrCollections` parameter.

	`cascadeCommit:Boolean` (default = `false`) — Set to `true` to ensure that changes to associated items are also included in the commit.