MACROMEDIA FLASH MEDIA SERVER 2-SERVER MANAGEMENT ACTIONSCRIPT LANGUAGE Manuale Utente Scaricare il pdf (Pagina 89)

ADOBE FLASH MEDIA INTERACTIVE SERVER

Server-Side ActionScript Language Reference

An event handler invoked when a shared object receives a message with the same name from the client-side

SharedObject.send() method. You must define a Function object and assign it to the event handler.

The

this keyword used in the body of the function is set to the shared object instance returned by

SharedObject.get().

If you don’t want the server to receive a particular message, do not define this handler.

Availability

Flash Communication Server 1

Parameters

p1, ..., pN Optional parameters passed to the handler method if the message contains user-defined parameters.

These parameters are the user-defined objects that are passed to the

SharedObject.send() method.

Returns

Any return value is ignored by the server.

Example

The following example defines an event handler called

traceArgs:

var so = SharedObject.get("userList", false);

so.traceArgs = function(msg1, msg2){

trace(msg1 + " : " + msg2);

};

SharedObject.isDirty

so.isDirty

Read-only; a boolean value indicating whether a persistent shared object has been modified since the last time it was

stored (

true) or not (false). The SharedObject.commit() method stores shared objects with an isDirty

property that is

true.

This property is always

false for nonpersistent shared objects.

Availability

Flash Media Server 2

Example

The following example saves the

so shared object if it has been changed:

var so = SharedObject.get("foo", true);

if (so.isDirty){

SharedObject.commit(so.name);

}

SharedObject.lock()

so.lock()

Locks a shared object. This method gives the server-side script exclusive access to the shared object; when the

SharedObject.unlock() method is called, all changes are batched and one update message is sent through the

SharedObject.onSync() handler to all the clients that subscribe to this shared object. If you nest the

SharedObject.lock() and SharedObject.unlock() methods, make sure that there is an unlock() method for

every

lock() method; otherwise, clients are blocked from accessing the shared object.

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