| Adobe® Flex® 4 Beta Language Reference | All Packages | All Classes | Language Elements | Index | Appendixes | Conventions | Show Frames Hide Frames |  | |
| URLMonitor | Properties | Methods | Events | ||
| Package | air.net |
| Class | public class URLMonitor |
| Inheritance | URLMonitor  ServiceMonitor EventDispatcher Object |
| Runtime Versions: | AIR 1.0 |
This class is included in the ServiceMonitor.swc file. Adobe® Flash® Builder™ loads this class automatically when you create a project for Adobe® AIR®. The Adobe® Flex® SDK also includes this servicemonitor.swc file, which you should include when compiling the application if you are using the Flex SDK.
| Property | Defined By | ||
|---|---|---|---|
 acceptableStatusCodes : Array
The numeric status codes representing a successful result. | URLMonitor | ||
 | available : Boolean
Whether the service is currently considered "available."
The initial value is false until either a status check sets the
property to true or the property is initialized to true explicitly.
Typically, this property is set by the checkStatus() implementation in a subclass or specializer,
but if the application has independent information about a service's availability (for example, a request just succeeded
or failed), the property can be set explicitly.
| ServiceMonitor | |
| constructor : Object
A reference to the class object or constructor function for a given object instance. | Object | |
| lastStatusUpdate : Date [read-only]
The time of the last status update. | ServiceMonitor | |
| pollInterval : Number
The interval, in milliseconds, for polling the server. | ServiceMonitor | |
| prototype : Object [static]
A reference to the prototype object of a class or function object. | Object | |
| running : Boolean [read-only]
Whether the monitor has been started. | ServiceMonitor | |
| urlRequest : URLRequest [read-only]
The URLRequest object representing the probe request. | URLMonitor | ||
| Method | Defined By | ||
|---|---|---|---|
Creates a URLMonitor Object for a specified HTTP- or HTTPS-based service. | URLMonitor | ||
| 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 | |
|
Dispatches an event into the event flow. | EventDispatcher | |
|
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 | |
|
Indicates whether an instance of the Object class is in the prototype chain of the object specified
as the parameter. | Object | |
| [static]
Adds public ServiceMonitor methods to a JavaScript constructor function's prototype. | ServiceMonitor | |
|
Indicates whether the specified property exists and is enumerable. | Object | |
|
Removes a listener from the EventDispatcher object. | EventDispatcher | |
|
Sets the availability of a dynamic property for loop operations. | Object | |
|
Starts the service monitor. | ServiceMonitor | |
|
Stops monitoring the service. | ServiceMonitor | |
|
Returns the string representation of this object, formatted according to locale-specific conventions. | Object | |
[override]
Returns the string representation of the specified object. | URLMonitor | ||
|
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]
Attempts to load content from a URL in the background, to check for a
returned HTTP status code. | URLMonitor | ||
| acceptableStatusCodes | property |
Hide Inherited Public Properties
Show Inherited Public PropertiesacceptableStatusCodes:Array| Runtime Versions: | AIR 1.0 |
The numeric status codes representing a successful result.
public function get acceptableStatusCodes():Array public function set acceptableStatusCodes(value:Array):void| urlRequest | property |
urlRequest:URLRequest [read-only] | Runtime Versions: | AIR 1.0 |
The URLRequest object representing the probe request.
public function get urlRequest():URLRequest| URLMonitor | () | Constructor |
public function URLMonitor(urlRequest:URLRequest, acceptableStatusCodes:Array = null)| Runtime Versions: | AIR 1.0 |
Creates a URLMonitor Object for a specified HTTP- or HTTPS-based service.
After creating a URLMonitor, the caller should call the start()
method to begin monitoring the status of the service.
As with the Timer object, the caller should maintain a reference to the URLMonitor object. Otherwise the runtime could delete the object, thereby ending the monitoring.
A URLRequest parameter specifies the probe request for polling the server.
Typically, the request method will be either "GET" or "HEAD".
urlRequest:URLRequest — The URLRequest object representing a probe request for polling the server.
| |
acceptableStatusCodes:Array (default = null)If you do not specify a value for the
|
| checkStatus | () | method |
override protected function checkStatus():void| Runtime Versions: | AIR 1.0 |
Attempts to load content from a URL in the background, to check for a returned HTTP status code.
If it receives a status code that is listed in the acceptableStatusCodes
property, the available property will be set to true.
If it receives a status code that is not in the acceptableStatusCodes
list, or if there is a security error or I/O error, the available
property will be set to false.
| toString | () | method |
override public function toString():String| Runtime Versions: | AIR 1.0 |
Returns the string representation of the specified object.
Note: Methods of the Object class are dynamically created on Object's prototype. To redefine this method in a subclass of Object, do not use the override keyword. For example, a subclass of Object implements function toString():String instead of using an override of the base class.
String — A string representation of the object.
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