Adobe® Flex® 4 Language Reference
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mx.data.messages 
UpdateCollectionMessage 
Packagemx.data.messages
Classpublic class UpdateCollectionMessage
InheritanceUpdateCollectionMessage Inheritance DataMessage Inheritance AsyncMessage Inheritance AbstractMessage Inheritance Object

Language Version: ActionScript 3.0
Product Version: LiveCycle Data Services 3
Runtime Versions: Flash Player 9, AIR 1.1

This message is used to establish consistency between the remote sequence and the corresponding local collection. It contains all insert and delete operations that were performed on a collection. Clients send this message when a local collection is updated using the collection API (IListView.removeItemAt(), etc) or the Single Managed Object API (DataService.createItem()). The remote destination sends this message when the remote sequence is updated and items are moved or removed and inserted. This body property contains a list of UpdateCollectionRange objects that indicate just how the collection was modified. Applying the update collection ranges inorder will establish a consistent ordering of the items within the specified collection.



Public Properties
 PropertyDefined By
 Inheritedbody : Object
The body of a message contains the specific data that needs to be delivered to the remote destination.
AbstractMessage
 InheritedclientId : String
The clientId indicates which MessageAgent sent the message.
AbstractMessage
  collectionId : Object
The unique identifier for the collection that was updated.
UpdateCollectionMessage
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
 InheritedcorrelationId : String
Provides access to the correlation id of the message.
AsyncMessage
 Inheriteddestination : String
The message destination.
AbstractMessage
 Inheritedheaders : Object
The headers of a message are an associative array where the key is the header name and the value is the header value.
AbstractMessage
 Inheritedidentity : Object
Provides access to the identity map which defines the unique identity of the item affected by this DataMessage (relevant for create/update/delete but not fill operations).
DataMessage
 InheritedmessageId : String
The unique id for the message.
AbstractMessage
 Inheritedoperation : uint
Provides access to the operation/command of this DataMessage.
DataMessage
 Inheritedprototype : Object
[static] A reference to the prototype object of a class or function object.
Object
  replace : Boolean
Indicates if the entire collection should be replaced by the contents of this message.
UpdateCollectionMessage
 Inheritedtimestamp : Number
Provides access to the time stamp for the message.
AbstractMessage
 InheritedtimeToLive : Number
The time to live value of a message indicates how long the message should be considered valid and deliverable.
AbstractMessage
  updateMode : int
Indicates the state of this update.
UpdateCollectionMessage
Public Methods
 MethodDefined By
  
Creates a new instance of an empty UpdateCollectionMessage.
UpdateCollectionMessage
 Inherited
[static] Provides a description of the operation specified.
DataMessage
 Inherited
Indicates whether an object has a specified property defined.
Object
 Inherited
Returns true if this is a create operation.
DataMessage
 Inherited
Returns true if this message is both an update and its list of property names has a length of zero.
DataMessage
 Inherited
Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.
Object
 Inherited
Indicates whether the specified property exists and is enumerable.
Object
 Inherited
Sets the availability of a dynamic property for loop operations.
Object
 Inherited
Returns the string representation of this object, formatted according to locale-specific conventions.
Object
 Inherited
Returns a string representation of the message.
AbstractMessage
 Inherited
Returns the primitive value of the specified object.
Object
Public Constants
 ConstantDefined By
 InheritedBATCHED_OPERATION : uint = 5
[static] This operation represents a set of batched operations to be performed as a single unit.
DataMessage
  CLIENT_UPDATE : int = 0
[static] Indicates this update collection message was client generated.
UpdateCollectionMessage
 InheritedCOUNT_OPERATION : uint = 9
[static] This operation requests that a configured <count-method> be invoked on a remote destination.
DataMessage
 InheritedCREATE_AND_SEQUENCE_OPERATION : uint = 11
[static] This operation requests a create of the specified item from a remote destination.
DataMessage
 InheritedCREATE_OPERATION : uint = 0
[static] Indicates a create operation.
DataMessage
 InheritedDELETE_OPERATION : uint = 4
[static] This operation indicates that the specified item should be removed.
DataMessage
 InheritedDESTINATION_CLIENT_ID_HEADER : String = "DSDstClientId"
[static] Messages pushed from the server may arrive in a batch, with messages in the batch potentially targeted to different Consumer instances.
AbstractMessage
 InheritedENDPOINT_HEADER : String = "DSEndpoint"
[static] Messages are tagged with the endpoint id for the Channel they are sent over.
AbstractMessage
 InheritedFILL_OPERATION : uint = 1
[static] This operation requests that the remote destination create a sequence using the remote destination's adapter.
DataMessage
 InheritedFIND_ITEM_OPERATION : uint = 21
[static] Like the FILL_OPERATION but ensures only a single item is returned in the response array.
DataMessage
 InheritedFLEX_CLIENT_ID_HEADER : String = "DSId"
[static] This header is used to transport the global FlexClient Id value in outbound messages once it has been assigned by the server.
AbstractMessage
 InheritedGET_OPERATION : uint = 2
[static] This operation requests that the remote destination get a specific managed object based on its unique ID.
DataMessage
 InheritedGET_OR_CREATE_OPERATION : uint = 10
[static] This operation requests an item with the specified identity from the remote destination.
DataMessage
 InheritedGET_SEQUENCE_ID_OPERATION : uint = 12
[static] This operation requests a sequence id for a set of fill parameters.
DataMessage
 InheritedMULTI_BATCH_OPERATION : uint = 6
[static] This operation represents a set of operations to be performed as a single unit but which may contain multiple batched, create, update or delete operations that involve more than one destination, that is, more than one remote adapter.
DataMessage
 InheritedPAGE_ITEMS_OPERATION : uint = 20
[static] This operation indicates a request for a page of items specified by identities.
DataMessage
 InheritedPAGE_OPERATION : uint = 8
[static] This operation is used to retrieve a page of sequenced content that is delivered across several messages instead of in a single message.
DataMessage
 InheritedPRIORITY_HEADER : String = "DSPriority"
[static] Messages sent by a MessageAgent can have a priority header with a 0-9 numerical value (0 being lowest) and the server can choose to use this numerical value to prioritize messages to clients.
AbstractMessage
 InheritedRELEASE_COLLECTION_OPERATION : uint = 18
[static] This operation indicates that the client is no longer interested in receiving notification of operations performed on the specified collection.
DataMessage
 InheritedRELEASE_ITEM_OPERATION : uint = 19
[static] This operation indicates that the client is no longer interested in receiving notification of operations performed on the specified item.
DataMessage
 InheritedREMOTE_ALIAS : String = "flex.data.messages.DataMessage"
[static] Remote alias specifying the fully qualified server side class corresponding to this class.
DataMessage
 InheritedREMOTE_CREDENTIALS_CHARSET_HEADER : String = "DSRemoteCredentialsCharset"
[static] Messages that need to set remote credentials for a destination may also need to report the character-set encoding that was used to create the credentials String using this header.
AbstractMessage
 InheritedREMOTE_CREDENTIALS_HEADER : String = "DSRemoteCredentials"
[static] Messages that need to set remote credentials for a destination carry the Base64 encoded credentials in this header.
AbstractMessage
 InheritedREQUEST_TIMEOUT_HEADER : String = "DSRequestTimeout"
[static] Messages sent with a defined request timeout use this header.
AbstractMessage
  SERVER_OVERRIDE : int = 2
[static] Indicates this update collection message was client generated and the remote destination determined that it should be reverted on that client.
UpdateCollectionMessage
  SERVER_UPDATE : int = 1
[static] Indicates this update collection message was remotely generated and is based on the current state of the remote sequence.
UpdateCollectionMessage
 InheritedSTATUS_CODE_HEADER : String = "DSStatusCode"
[static] A status code can provide context about the nature of a response message.
AbstractMessage
 InheritedSUBTOPIC_HEADER : String = "DSSubtopic"
[static] Messages sent by a MessageAgent with a defined subtopic property indicate their target subtopic in this header.
AsyncMessage
 InheritedTRANSACTED_OPERATION : uint = 7
[static] This operation is similar to the MULTI_BATCH_OPERATION with the addition that the server should encapsulate the multiple batches of messages within a transaction.
DataMessage
 InheritedUNKNOWN_OPERATION : uint = 1000
[static] Code for an unknown operation type.
DataMessage
 InheritedUPDATE_BODY_CHANGES : uint = 0
[static] This constant is used to access the list of changed property names.
DataMessage
 InheritedUPDATE_BODY_NEW : uint = 2
[static] This constant is used to access the new value of a changed item.
DataMessage
 InheritedUPDATE_BODY_PREV : uint = 1
[static] This constant is used to access the previous value of the changed item.
DataMessage
 InheritedUPDATE_COLLECTION_OPERATION : uint = 17
[static] This operation is sent when a local or remote sequence has been modified by insert(s) or delete(s).
DataMessage
 InheritedUPDATE_OPERATION : uint = 3
[static] This operation indicates an update to data object has been performed.
DataMessage
Property Detail

collectionId

property
public var collectionId:Object

Language Version: ActionScript 3.0
Product Version: LiveCycle Data Services 3
Runtime Versions: Flash Player 9, AIR 1.1

The unique identifier for the collection that was updated. For a collection filled with the DataService.fill() method this contains and Array of the parameters specified.

replace

property 
public var replace:Boolean

Language Version: ActionScript 3.0
Product Version: LiveCycle Data Services 3
Runtime Versions: Flash Player 9, AIR 1.1

Indicates if the entire collection should be replaced by the contents of this message. When the number of changes to a remote sequence have reached a tipping point a replace message is generated as an optimization. When true the body property contains an Array of item identities that should replace any existing items.

updateMode

property 
public var updateMode:int

Language Version: ActionScript 3.0
Product Version: LiveCycle Data Services 3
Runtime Versions: Flash Player 9, AIR 1.1

Indicates the state of this update. The remote destination sends update collection messages to clients with one of three update modes:

  • UpdateCollectionMessage.SERVER_UPDATE - client applies this update collection unconditionally
  • UpdateCollectionMessage.CLIENT_UPDATE - the committing client does not need to process this update collection.
  • UpdateCollectionMessage.SERVER_OVERRIDEN - the remote destination modified the update collection message sent by the client and the committing client must revert this update collection.

Constructor Detail

UpdateCollectionMessage

()Constructor
public function UpdateCollectionMessage()

Language Version: ActionScript 3.0
Product Version: LiveCycle Data Services 3
Runtime Versions: Flash Player 9, AIR 1.1

Creates a new instance of an empty UpdateCollectionMessage.

Constant Detail

CLIENT_UPDATE

Constant
public static const CLIENT_UPDATE:int = 0

Language Version: ActionScript 3.0
Product Version: LiveCycle Data Services 3
Runtime Versions: Flash Player 9, AIR 1.1

Indicates this update collection message was client generated.

See also

SERVER_OVERRIDE

Constant 
public static const SERVER_OVERRIDE:int = 2

Language Version: ActionScript 3.0
Product Version: LiveCycle Data Services 3
Runtime Versions: Flash Player 9, AIR 1.1

Indicates this update collection message was client generated and the remote destination determined that it should be reverted on that client. A subsequent update collection message will follow containing the correct values to apply getting the client collection back to a consistent state with the remote one.

See also

SERVER_UPDATE

Constant 
public static const SERVER_UPDATE:int = 1

Language Version: ActionScript 3.0
Product Version: LiveCycle Data Services 3
Runtime Versions: Flash Player 9, AIR 1.1

Indicates this update collection message was remotely generated and is based on the current state of the remote sequence.

See also