| Package | mx.messaging |
| Class | public class MultiTopicConsumer |
| Inheritance | MultiTopicConsumer  AbstractConsumer MessageAgent EventDispatcher Object |
| Language Version: | ActionScript 3.0 |
| Product Versions: | BlazeDS 4, Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
Like the regular Consumer, the MultiTopicConsumer sends subscribe and unsubscribe messages which generate a MessageAckEvent or MessageFaultEvent depending upon whether the operation was successful or not. Once subscribed, a MultiTopicConsumer dispatches a MessageEvent for each message it receives.
MXML Syntax
Show MXML Syntax
Hide MXML SyntaxThe <mx:MultiTopicConsumer> tag has these properties:
<mx:Consumer
Properties
subscriptions=""an empty ArrayCollection of SubscriptionInfo objects"
resubscribeAttempts="5"
resubscribeInterval="5000"
timestamp="No default."
/>
| Property | Defined By | ||
|---|---|---|---|
 | authenticated : Boolean [read-only]
Indicates if this MessageAgent is using an authenticated connection to
its destination. | MessageAgent | |
| channelSet : ChannelSet
Provides access to the ChannelSet used by the MessageAgent. | MessageAgent | |
| clientId : String [read-only]
Provides access to the client id for the MessageAgent. | MessageAgent | |
| connected : Boolean [read-only]
Indicates whether this MessageAgent is currently connected to its
destination via its ChannelSet. | MessageAgent | |
| constructor : Object
A reference to the class object or constructor function for a given object instance. | Object | |
| destination : String
Provides access to the destination for the MessageAgent. | MessageAgent | |
| maxFrequency : uint
Determines the maximum number of messages per second the Consumer wants
to receive. | AbstractConsumer | |
| requestTimeout : int
Provides access to the request timeout in seconds for sent messages. | MessageAgent | |
| resubscribeAttempts : int
The number of resubscribe attempts that the Consumer makes in the event
that the destination is unavailable or the connection to the destination fails. | AbstractConsumer | |
| resubscribeInterval : int
The number of milliseconds between resubscribe attempts. | AbstractConsumer | |
| subscribed : Boolean [read-only]
Indicates whether the Consumer is currently subscribed. | AbstractConsumer | |
| subscriptions : ArrayCollection
Stores an Array of SubscriptionInfo objects. | MultiTopicConsumer | ||
| timestamp : Number
Contains the timestamp of the most recent message this Consumer
has received. | AbstractConsumer | |
| Method | Defined By | ||
|---|---|---|---|
Constructor. | MultiTopicConsumer | ||
|
Invoked by a MessageResponder upon receiving a result for a sent
message. | MessageAgent | |
| 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 | |
This is a convenience method for adding a new subscription. | MultiTopicConsumer | ||
|
Handles a CONNECT ChannelEvent. | MessageAgent | |
|
Handles a DISCONNECT ChannelEvent. | MessageAgent | |
|
Handles a ChannelFaultEvent. | MessageAgent | |
| [override]
Disconnects the Consumer from its remote destination. | AbstractConsumer | |
|
Dispatches an event into the event flow. | EventDispatcher | |
|
Invoked by a MessageResponder upon receiving a fault for a sent message. | MessageAgent | |
|
Checks whether the EventDispatcher object has any listeners registered for a specific type
of event. | EventDispatcher | |
|
Indicates whether an object has a specified property defined. | Object | |
|
Returns true if there are any pending requests for the passed in message. | MessageAgent | |
|
Called after the implementing object has been created
and all properties specified on the tag have been assigned. | MessageAgent | |
|
Indicates whether an instance of the Object class is in the prototype chain of the object specified
as the parameter. | Object | |
|
Logs the MessageAgent out from its remote destination. | MessageAgent | |
|
Indicates whether the specified property exists and is enumerable. | Object | |
|
Requests any messages that are queued for this Consumer on the server. | AbstractConsumer | |
|
Removes a listener from the EventDispatcher object. | EventDispatcher | |
This method removes the subscription specified by the subtopic
and selector. | MultiTopicConsumer | ||
|
Sets the credentials that the MessageAgent uses to authenticate to
destinations. | MessageAgent | |
|
Sets the availability of a dynamic property for loop operations. | Object | |
|
Sets the remote credentials that will be passed through to the remote destination
for authenticating to secondary systems. | MessageAgent | |
|
Subscribes to the remote destination. | AbstractConsumer | |
|
Returns the string representation of this object, formatted according to locale-specific conventions. | Object | |
|
Returns the string representation of the specified object. | Object | |
|
Unsubscribes from the remote destination. | AbstractConsumer | |
|
Returns the primitive value of the specified object. | Object | |
|
Checks whether an event listener is registered with this EventDispatcher object or any of
its ancestors for the specified event type. | EventDispatcher | |
| Method | Defined By | ||
|---|---|---|---|
[override]
Returns a subscribe message. | MultiTopicConsumer | ||
[override]
Returns an unsubscribe mesage. | MultiTopicConsumer | ||
|
Handles the authentication fault on the server. | MessageAgent | |
|
Used to automatically initialize the channelSet property for the
MessageAgent before it connects for the first time. | MessageAgent | |
|
Sends a Message from the MessageAgent to its destination using the
agent's ChannelSet. | MessageAgent | |
|
This function should be overriden by sublasses to implement reauthentication due to
server session time-out behavior specific to them. | MessageAgent | |
| Event | Summary | Defined By | ||
|---|---|---|---|---|
| Dispatched when an acknowledge message is received for a sent message. | MessageAgent | ||
| [broadcast event] Dispatched when the Flash Player or AIR application gains operating system focus and becomes active. | EventDispatcher | ||
| Dispatched when the underlying Channel the MessageAgent is using connects. | MessageAgent | ||
| Dispatched when the underlying Channel the MessageAgent is using disconnects. | MessageAgent | ||
| Dispatched when the underlying Channel the MessageAgent is using faults. | MessageAgent | ||
| [broadcast event] Dispatched when the Flash Player or AIR application operating loses system focus and is becoming inactive. | EventDispatcher | ||
| Dispatched when a message fault occurs. | MessageAgent | ||
| Dispatched when a message is received by the Consumer. | MultiTopicConsumer | |||
| Dispatched when the connected property of the MessageAgent changes. | MessageAgent | ||
subscriptions | property |
subscriptions:ArrayCollection| Language Version: | ActionScript 3.0 |
| Product Versions: | BlazeDS 4, Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
Stores an Array of SubscriptionInfo objects. Each subscription contains a subtopic and a selector each of which can be null. A subscription with a non-null subtopic restricts the subscription to messages delivered with only that subtopic. If a subtopic is null, it uses the selector with no subtopic. If the selector and the subtopic is null, the subscription receives any messages targeted at the destination with no subtopic. The subtopic can contain a wildcard specification.
Before a call to the subscribe() method, this property
can be set with no side effects.
After the MultiTopicConsumer has subscribed to its destination, changing this
value has the side effect of updating the MultiTopicConsumer's subscription to
include any new subscriptions and remove any subscriptions you deleted from
the ArrayCollection.
The remote destination must understand the value of the selector expression.
This property can be used as the source for data binding. When this property is modified, it dispatches the propertyChange event.
Implementation
public function get subscriptions():ArrayCollection public function set subscriptions(value:ArrayCollection):voidMultiTopicConsumer | () | Constructor |
public function MultiTopicConsumer()| Language Version: | ActionScript 3.0 |
| Product Versions: | BlazeDS 4, Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
Constructor.
Example ( How to use this example )
function initConsumer():void
{
var consumer:Consumer = new MultiTopicConsumer();
consumer.destination = "NASDAQ";
consumer.addEventListener(MessageEvent.MESSAGE, messageHandler);
consumer.addSubscription("myStock1", "operation IN ('BID', 'Ask')");
consumer.addSubscription("myStock2", "operation IN ('BID', 'Ask')");
consumer.subscribe();
}
function messageHandler(event:MessageEvent):void
{
var msg:IMessage = event.message;
var info:Object = msg.body;
trace("-App recieved message: " + msg.toString());
}
addSubscription | () | method |
public function addSubscription(subtopic:String = null, selector:String = null, maxFrequency:uint = 0):void| Language Version: | ActionScript 3.0 |
| Product Versions: | BlazeDS 4, Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
This is a convenience method for adding a new subscription. It just creates a new SubscriptionInfo object and adds it to the subscriptions property. To call this method, you provide the subtopic and selector string for the new subscription. If the subtopic is null, the subscription applies to messages which do not have a subtopic set in the producer. If the selector string is null, all messages sent which match the subtopic string are received by this consumer.
Parameters
subtopic:String (default = null) | |
selector:String (default = null) | |
maxFrequency:uint (default = 0) |
buildSubscribeMessage | () | method |
override protected function buildSubscribeMessage():CommandMessage| Language Version: | ActionScript 3.0 |
| Product Versions: | BlazeDS 4, Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
Returns a subscribe message.
ReturnsCommandMessage — The subscribe CommandMessage.
|
buildUnsubscribeMessage | () | method |
override protected function buildUnsubscribeMessage(preserveDurable:Boolean):CommandMessage| Language Version: | ActionScript 3.0 |
| Product Versions: | BlazeDS 4, Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
Returns an unsubscribe mesage.
Parameters
preserveDurable:Boolean — When true, durable JMS subscriptions are
not destroyed, allowing consumers to later resubscribe and
receive missed messages.
|
CommandMessage — The unsubscribe CommandMessage.
|
removeSubscription | () | method |
public function removeSubscription(subtopic:String = null, selector:String = null):void| Language Version: | ActionScript 3.0 |
| Product Versions: | BlazeDS 4, Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
This method removes the subscription specified by the subtopic and selector.
Parameters
subtopic:String (default = null) | |
selector:String (default = null) |
message | Event |
mx.messaging.events.MessageEventproperty MessageEvent.type =
mx.messaging.events.MessageEvent.MESSAGE| Language Version: | ActionScript 3.0 |
| Product Versions: | BlazeDS 4, Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
Dispatched when a message is received by the Consumer.
The MESSAGE event type; dispatched upon receipt of a message.The value of this constant is "message".
The properties of the event object have the following values:
| Property | Value |
|---|---|
bubbles | false |
cancelable | false |
currentTarget | The Object that defines the
event listener that handles the event. For example, if you use
myButton.addEventListener() to register an event listener,
myButton is the value of the currentTarget. |
message | The message associated with this event. |
target | The Object that dispatched the event;
it is not always the Object listening for the event.
Use the currentTarget property to always access the
Object listening for the event. |
Thu Dec 6 2018, 01:12 PM -08:00