Adobe® Flex® 4 Language Reference
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mx.rpc.http 
Operation 
Packagemx.rpc.http
Classpublic class Operation
InheritanceOperation Inheritance AbstractOperation Inheritance AbstractOperation Inheritance AbstractInvoker Inheritance EventDispatcher Inheritance Object

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

An Operation used specifically by an HTTPMultiService. An Operation is an individual operation on a service usually corresponding to a single operation on the server side. An Operation can be called either by invoking the function of the same name on the service or by accessing the Operation as a property on the service and calling the send(param1, param2) method. HTTP services also support a sendBody method which allows you to directly specify the body of the HTTP response. If you use the send(param1, param2) method, the body is typically formed by combining the argumentNames property of the operation with the parameters sent. An Object is created which uses the argumentNames[i] as the key and the corresponding parameter as the value.

The exact way in which the HTTP operation arguments is put into the HTTP body is determined by the serializationFilter used.



Public Properties
 PropertyDefined By
 InheritedargumentNames : Array
An ordered list of the names of the arguments to pass to a method invocation.
AbstractOperation
 Inheritedarguments : Object
The arguments to pass to the Operation when it is invoked.
AbstractOperation
  concurrency : String
[override] Value that indicates how to handle multiple calls to the same service operation.
Operation
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
  contentType : String
[override] Type of content for service requests.
Operation
 Inheritedheaders : Object
Custom HTTP headers to be sent to the third party endpoint.
AbstractOperation
 InheritedlastResult : Object
[read-only] The result of the last invocation.
AbstractInvoker
  makeObjectsBindable : Boolean
[override] When this value is true, anonymous objects returned are forced to bindable objects.
Operation
  method : String
[override] HTTP method for sending the request.
Operation
 Inheritedname : String
The name of this Operation.
AbstractOperation
 InheritedoperationManager : Function
This property is set usually by framework code which wants to modify the behavior of a service invocation without modifying the way in which the service is called externally.
AbstractInvoker
 Inheritedproperties : Object
This is a hook primarily for framework developers to register additional user specified properties for your operation.
AbstractOperation
 Inheritedprototype : Object
[static] A reference to the prototype object of a class or function object.
Object
 Inheritedrequest : Object
Object of name-value pairs used as parameters to the URL.
AbstractOperation
 InheritedresultElementType : Class
Like resultType, used to define the ActionScript class used by a given operation though this property only applies to operations which return a multi-valued result (e.g.
AbstractInvoker
  resultFormat : String
[override] Value that indicates how you want to deserialize the result returned by the HTTP call.
Operation
 InheritedresultType : Class
Specifies an optional return type for the operation.
AbstractInvoker
  rootURL : String
[override] The rootURL is used to compute the URL for an HTTP service operation when the a relative URL is specified for the operation.
Operation
 InheritedserializationFilter : SerializationFilter
A SerializationFilter can control how the arguments are formatted to form the content of the HTTP request.
AbstractOperation
 Inheritedservice : AbstractService
[read-only] Provides convenient access to the service on which the Operation is being invoked.
AbstractOperation
  showBusyCursor : Boolean
[override] If true, a busy cursor is displayed while a service is executing.
Operation
 Inheritedurl : String
Location of the service.
AbstractOperation
  useProxy : Boolean
[override] Specifies whether to use the Flex proxy service.
Operation
 InheritedxmlDecode : Function
ActionScript function used to decode a service result from XML.
AbstractOperation
 InheritedxmlEncode : Function
ActionScript function used to encode a service request as XML.
AbstractOperation
Public Methods
 MethodDefined By
  
Operation(service:mx.rpc.http:HTTPMultiService = null, name:String = null)
Creates a new Operation.
Operation
 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
Cancels the last service invocation or an invokation with the specified ID.
AbstractInvoker
 Inherited
clearResult(fireBindingEvent:Boolean = true):void
Sets the result property of the invoker to null.
AbstractInvoker
 Inherited
Dispatches an event into the event flow.
EventDispatcher
 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
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
  
[override] Executes the http operation.
Operation
 Inherited
AbstractOperation
 Inherited
Sets the availability of a dynamic property for loop operations.
Object
 Inherited
This hook is exposed to update the lastResult property.
AbstractInvoker
 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
Returns the HTTP request headers.
AbstractOperation
 Inherited
Returns the serialization filter.
AbstractOperation
Events
 Event Summary Defined By
 Inherited[broadcast event] Dispatched when the Flash Player or AIR application gains operating system focus and becomes active.EventDispatcher
 Inherited[broadcast event] Dispatched when the Flash Player or AIR application operating loses system focus and is becoming inactive.EventDispatcher
 InheritedDispatched when an Operation call fails.AbstractOperation
 InheritedDispatched when an Operation invocation successfully returns.AbstractOperation
Property Detail

concurrency

property
concurrency:String[override]

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Value that indicates how to handle multiple calls to the same service operation. The default value is multiple. The following values are permitted:

  • multiple Existing requests are not cancelled, and the developer is responsible for ensuring the consistency of returned data by carefully managing the event stream. This is the default value.
  • single Only a single request at a time is allowed on the operation; multiple requests generate a fault.
  • last Making a request cancels any existing request.



Implementation
    override public function get concurrency():String
    override public function set concurrency(value:String):void

contentType

property 
contentType:String[override]

Type of content for service requests. The default is application/x-www-form-urlencoded which sends requests like a normal HTTP POST with name-value pairs. application/xml send requests as XML.



Implementation
    override public function get contentType():String
    override public function set contentType(value:String):void

makeObjectsBindable

property 
makeObjectsBindable:Boolean[override]

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

When this value is true, anonymous objects returned are forced to bindable objects.



Implementation
    override public function get makeObjectsBindable():Boolean
    override public function set makeObjectsBindable(value:Boolean):void

method

property 
method:String[override]

HTTP method for sending the request. Permitted values are GET, POST, HEAD, OPTIONS, PUT, TRACE and DELETE. Lowercase letters are converted to uppercase letters. The default value is GET.



Implementation
    override public function get method():String
    override public function set method(value:String):void

resultFormat

property 
resultFormat:String[override]

Value that indicates how you want to deserialize the result returned by the HTTP call. The value for this is based on the following:

  • Whether you are returning XML or name/value pairs.
  • How you want to access the results; you can access results as an object, text, or XML.

The default value is object. The following values are permitted:

  • object The value returned is XML and is parsed as a tree of ActionScript objects. This is the default.
  • array The value returned is XML and is parsed as a tree of ActionScript objects however if the top level object is not an Array, a new Array is created and the result set as the first item. If makeObjectsBindable is true then the Array will be wrapped in an ArrayCollection.
  • xml The value returned is XML and is returned as literal XML in an ActionScript XMLnode object.
  • flashvars The value returned is text containing name=value pairs separated by ampersands, which is parsed into an ActionScript object.
  • text The value returned is text, and is left raw.
  • e4x The value returned is XML and is returned as literal XML in an ActionScript XML object, which can be accessed using ECMAScript for XML (E4X) expressions.



Implementation
    override public function get resultFormat():String
    override public function set resultFormat(value:String):void

rootURL

property 
rootURL:String[override]

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The rootURL is used to compute the URL for an HTTP service operation when the a relative URL is specified for the operation. The directory name of the rootURL is prepended to any relative URLs for the operation. It is typically more convenient to set the baseURL since baseURL specifies the directory name directly whereas rootURL specifies the name of a file whose directory name is prepended. If neither rootURL nor baseURL are set explicitly, the directory name of the .swf file is prepended to relative paths.



Implementation
    override public function get rootURL():String
    override public function set rootURL(value:String):void

showBusyCursor

property 
showBusyCursor:Boolean[override]

If true, a busy cursor is displayed while a service is executing. The default value is false.



Implementation
    override public function get showBusyCursor():Boolean
    override public function set showBusyCursor(value:Boolean):void

useProxy

property 
useProxy:Boolean[override]

Specifies whether to use the Flex proxy service. The default value is false. If you do not specify true to proxy requests though the Flex server, you must ensure that the player can reach the target URL. You also cannot use destinations defined in the services-config.xml file if the useProxy property is set to false.



Implementation
    override public function get useProxy():Boolean
    override public function set useProxy(value:Boolean):void
Constructor Detail

Operation

()Constructor
public function Operation(service:mx.rpc.http:HTTPMultiService = null, name:String = null)

Language Version: ActionScript 3.0
Product Version: Flex 3 Creates a new Operation.
Runtime Versions: Flash Player 9, AIR 1.1

Creates a new Operation.

Parameters
service:mx.rpc.http:HTTPMultiService (default = null) — The HTTPMultiService object defining the service.
 
name:String (default = null) — The name of the service.
Method Detail

send

()method
override public function send(... args):mx.rpc:AsyncToken

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Executes the http operation. Any arguments passed in are passed along as part of the operation call. If there are no arguments passed, the arguments property of class is used as the source of parameters. HTTP operations commonly take named parameters, not positional parameters. To supply the names for these parameters, you can also set the argumentNames property to an array of the property names.

Parameters

... args — Optional arguments passed in as part of the method call. If there are no arguments passed, the arguments object is used as the source of parameters.

Returns
mx.rpc:AsyncToken — AsyncToken Call using the asynchronous completion token pattern. The same object is available in the result and fault events from the token property.