MACROMEDIA FLASH COMMUNICATION SERVER MX-SERVER-SIDE COMMUNICATION ACTIONSCRIPT DICTIONARY Uživatelský manuál stáhnout pdf (Strana 50)

Every shared object is identified by a unique name and contains a list of name-value pairs, called

properties, just like any other ActionScript object. A name must be a unique string and a value can

be any ActionScript data type. (For more information about data types, see Using Flash MX.) All

shared objects have a data property. Any property of the data property can be shared and is called

a slot.

A shared object can be owned by the current (local) application instance or by a different (remote)

application instance. The remote application instance can be on the same server or on a different

server. References to shared objects that are owned by a remote application instance are called

proxied shared objects.

The slot of a shared object owned by the local instance can be modified by multiple clients or by

the server simultaneously; there is no conflict on the server side when a shared object is modified.

For example, a call to

SharedObject.getProperty returns the latest value and setting a new

value assigns a new value for the named slot and updates the object version. If you write a server-

side script that modifies multiple properties, you can prevent other clients from modifying the

object during the update, by calling the

SharedObject.lock method before updating the object.

Then you can call SharedObject.unlock to commit the changes and allow other changes to be

made. Any change to a shared object results in notification to all the clients that are currently

subscribed to the shared object.

When you get a reference to a shared object owned by a remote application instance, any changes

made to the object are sent to the instance that owns the object. The success or failure of any

changes are sent using the

SharedObject.onSync event handler, if it is defined. Also, the

SharedObject.lock and SharedObject.unlock methods cannot be used to lock or unlock

proxied shared objects.

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 79 80

Žádné komentáře

MACROMEDIA FLASH COMMUNICATION SERVER MX-SERVER-SIDE COMMUNICATION ACTIONSCRIPT DICTIONARY Uživatelský manuál Strana 50