Adobe® Flex® 4 Language Reference
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mx.messaging.channels 
StreamingAMFChannel 
Packagemx.messaging.channels
Classpublic class StreamingAMFChannel
InheritanceStreamingAMFChannel Inheritance AMFChannel Inheritance NetConnectionChannel Inheritance PollingChannel Inheritance Channel Inheritance EventDispatcher Inheritance Object
Subclasses SecureStreamingAMFChannel

Language Version: ActionScript 3.0
Product Versions: BlazeDS 4, LiveCycle Data Services 3
Runtime Versions: Flash Player 9, AIR 1.1

The StreamingAMFChannel class provides support for messaging and offers a different push model than the base AMFChannel. Rather than polling for data from the server, the streaming channel opens an internal HTTP connection to the server that is held open to allow the server to stream data down to the client with no poll overhead.

Messages sent by this channel to the server are sent using a NetConnection which uses an HTTP connection internally for the duration of the operation. Once the message is sent and an acknowledgement or fault is returned the HTTP connection used by NetConnection is released by the channel. These client-to-server messages are not sent over the streaming HTTP connection that the channel holds open to receive server pushed data.

Although this class extends the base AMFChannel to inherit the regular AMF handling, it does not support polling.



Public Properties
 PropertyDefined By
 Inheritedauthenticated : Boolean
[read-only] Indicates if this channel is authenticated.
Channel
 InheritedchannelSets : Array
[read-only] Provides access to the ChannelSets connected to the Channel.
Channel
 Inheritedconnected : Boolean
[read-only] Indicates whether this channel has established a connection to the remote destination.
Channel
 InheritedconnectTimeout : int
Provides access to the connect timeout in seconds for the channel.
Channel
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
 Inheritedendpoint : String
[read-only] Provides access to the endpoint for this channel.
Channel
 InheritedfailoverURIs : Array
Provides access to the set of endpoint URIs that this channel can attempt to failover to if the endpoint is clustered.
Channel
 Inheritedid : String
Provides access to the id of this channel.
Channel
 InheritednetConnection : NetConnection
[read-only] Provides access to the associated NetConnection for this Channel.
NetConnectionChannel
 InheritedpiggybackingEnabled : Boolean
Indicates whether this channel will piggyback poll requests along with regular outbound messages when an outstanding poll is not in progress.
AMFChannel
 Inheritedpolling : Boolean
[read-only] Reports whether the channel is actively polling.
AMFChannel
 InheritedpollingEnabled : Boolean
Indicates whether this channel is enabled to poll.
AMFChannel
 InheritedpollingInterval : Number
Provides access to the polling interval for this Channel.
AMFChannel
 Inheritedprotocol : String
[override] [read-only] Returns the protocol for this channel (http).
AMFChannel
 Inheritedprototype : Object
[static] A reference to the prototype object of a class or function object.
Object
 Inheritedreconnecting : Boolean
[read-only] Indicates whether this channel is in the process of reconnecting to an alternate endpoint.
Channel
 InheritedrecordMessageSizes : Boolean
[read-only] Channel property determines the level of performance information injection - whether we inject message sizes or not.
Channel
 InheritedrecordMessageTimes : Boolean
[read-only] Channel property determines the level of performance information injection - whether we inject timestamps or not.
Channel
 InheritedrequestTimeout : int
Provides access to the default request timeout in seconds for the channel.
Channel
 Inheriteduri : String
Provides access to the URI used to create the whole endpoint URI for this channel.
Channel
Protected Properties
 PropertyDefined By
 InheritedshouldBeConnected : Boolean
[read-only] Indicates whether this channel should be connected to its endpoint.
Channel
Public Methods
 MethodDefined By
  
StreamingAMFChannel(id:String = null, uri:String = null)
Constructor.
StreamingAMFChannel
 Inherited
addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registers an event listener object with an EventDispatcher object so that the listener receives notification of an event.
EventDispatcher
 Inherited
Subclasses should override this method to apply any settings that may be necessary for an individual channel.
Channel
 Inherited
connect(channelSet:ChannelSet):void
Connects the ChannelSet to the Channel.
Channel
 Inherited
Disables polling based on the number of times enablePolling() and disablePolling() have been invoked.
PollingChannel
 Inherited
Disconnects the ChannelSet from the Channel.
Channel
 Inherited
Dispatches an event into the event flow.
EventDispatcher
 Inherited
Enables polling based on the number of times enablePolling() and disablePolling() have been invoked.
PollingChannel
 Inherited
Checks whether the EventDispatcher object has any listeners registered for a specific type of event.
EventDispatcher
 Inherited
Indicates whether an object has a specified property defined.
Object
 Inherited
Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.
Object
 Inherited
Sends a CommandMessage to the server to logout if the Channel is connected.
Channel
  
[override] Polling is not supported by this channel.
StreamingAMFChannel
 Inherited
Indicates whether the specified property exists and is enumerable.
Object
 Inherited
removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
Removes a listener from the EventDispatcher object.
EventDispatcher
 Inherited
send(agent:MessageAgent, message:IMessage):void
[override] Sends the specified message to its target destination.
PollingChannel
 Inherited
setCredentials(credentials:String, agent:MessageAgent = null, charset:String = null):void
Sets the credentials to the specified value.
Channel
 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 the string representation of the specified object.
Object
 Inherited
Returns the primitive value of the specified object.
Object
 Inherited
Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type.
EventDispatcher
Protected Methods
 MethodDefined By
 Inherited
Applies the client load balancing urls if they exists.
Channel
 Inherited
Processes a failed internal connect and dispatches the FAULT event for the channel.
Channel
 Inherited
Processes a successful internal connect and dispatches the CONNECT event for the Channel.
Channel
 Inherited
Handles a connect timeout by dispatching a ChannelFaultEvent.
Channel
 Inherited
Processes a failed internal disconnect and dispatches the FAULT event for the channel.
Channel
 Inherited
disconnectSuccess(rejected:Boolean = false):void
Processes a successful internal disconnect and dispatches the DISCONNECT event for the Channel.
Channel
 Inherited
Handles a change to the guard condition for managing initial Channel connect for the application.
Channel
 Inherited
Returns the appropriate MessageResponder for the Channel's send() method.
Channel
 Inherited
Connects the Channel to its endpoint.
Channel
 Inherited
internalDisconnect(rejected:Boolean = false):void
Disconnects the Channel from its endpoint.
Channel
 Inherited
Sends the Message out over the Channel and routes the response to the responder.
Channel
Events
 Event Summary Defined By
 Inherited[broadcast event] Dispatched when the Flash Player or AIR application gains operating system focus and becomes active.EventDispatcher
 InheritedDispatched after the channel has connected to its endpoint.Channel
 InheritedDispatched after the channel has disconnected from its endpoint.Channel
 InheritedDispatched after the channel has faulted.Channel
 Inherited[broadcast event] Dispatched when the Flash Player or AIR application operating loses system focus and is becoming inactive.EventDispatcher
 InheritedDispatched when a channel receives a message from its endpoint.Channel
 InheritedDispatched when a property of the channel changes.Channel
Constructor Detail

StreamingAMFChannel

()Constructor
public function StreamingAMFChannel(id:String = null, uri:String = null)

Language Version: ActionScript 3.0
Product Versions: BlazeDS 4, LiveCycle Data Services 3
Runtime Versions: Flash Player 9, AIR 1.1

Constructor.

Parameters
id:String (default = null) — The id of this Channel.
 
uri:String (default = null) — The uri for this Channel.
Method Detail

poll

()method
override public function poll():void

Language Version: ActionScript 3.0
Product Versions: BlazeDS 4, LiveCycle Data Services 3
Runtime Versions: Flash Player 9, AIR 1.1

Polling is not supported by this channel.