MACROMEDIA FLASH REMOTING MX-USING FLASH REMOTING FOR FLASH MX 2004 ACTIONSCRIPT 2.0 Spezifikationen PDF herunterladen (Seite 23)

This is the Title of the Book, eMatter Edition

Hello World

Section 1 of Example 1-1 includes the NetServices.as library, which contains the code

necessary to connect to a Flash Remoting–enabled server from Flash. If you do not

include NetServices.as, the example will not work, but you will not receive any errors

within the authoring environment.

Section 2 initializes two variables:

myURL and myServicePath.ThemyURL variable will

be used to create a NetConnection object that points to the server. The

myServicePath

variable will be used to create a service object that points to the service that will be

called.

The

myURL variable specifies the URL to the Flash Remoting gateway installed on the

server. If the Flash Remoting gateway is installed on a Microsoft .NET server, the

URL will point to the .aspx file for the gateway. Similarly, if you are using AMFPHP,

the URL will point to a gateway.php file on your server.

The

myServicePath variable specifies the path on the server to the remote service that

will be called. The naming convention is similar to a Java package, with each section

representing a directory on the server and the last section pointing to the actual ser-

vice. If the remote service is a Microsoft .NET DLL,

myServicePath should refer to

the DLL’s namespace and class name. Similarly, if the remote service is a Java class,

the

myServicePath variable will refer to the package name and class name of the Java

class. If the remote service is a web service,

myServicePath should contain the path to

the web service’s WSDL file.

Calls from the Flash Player to the application server via the Flash Remoting gateway

are asynchronous. Code execution within the Flash Player continues while data is

being loaded, which is similar to loading XML into the Flash Player. You must define

callback functions, which will be called automatically when the data loads from the

server.

A callback function is a function that is called when a specific event

occurs. For example, attaching a callback function to an object’s

onClick property causes the callback function to execute whenever the

object is clicked. Similarly, a remote service call causes a specific event

to occur, which can have a callback function associated with it.

In ActionScript, callback functions can be attached as properties to a generic object

(instantiated from the Object class). The functions are used to catch data and mes-

sages sent back from the server.

Section 3 of Example 1-1 creates an object and attaches two callback functions to it.

The onResult( ) callback function is called when data is returned from the remote

var myService = myServer.getService(myServicePath, myResult);

myService.sayHello( );

Example 1-1. Client-side ActionScript code (HelloWorld.fla) (continued)

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 39 40

Kommentare zu diesen Handbüchern

Keine Kommentare

MACROMEDIA FLASH REMOTING MX-USING FLASH REMOTING FOR FLASH MX 2004 ACTIONSCRIPT 2.0 Spezifikationen Seite 23

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Software-Handbücher MACROMEDIA FLASH REMOTING MX-USING FLASH REMOTING FOR FLASH MX 2004 ACTIONSCRIPT 2.0