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Synchronization

The Shared Cursor is a great component to demonstrate synchronization using the Flash Communication Server. The concept is this: When data changes, everything connected to the application (with security) must respond to the change. That response is completely up to you. Macromedia has used the object framework to allow you ultimate flexibility in handling data change.

There are at least two relationships that you can achieve with synchronization. These forms relate to how you set up the application. A subscriber/publisher relationship can have two forms. A one-way format has no interaction. This is similar to a presentation or a TV-type show with no return channel to receive input from the remote players. Another format for this relationship is similar to a classroom model with a group of students and a teacher facilitating a discussion. The teacher controls time where the participation is a one-way discussion and times where students can interact (multiple-way). Both formats in this relationship usually have two separate Flash movies communicating with a common Server application instance. One Flash movie would have publishing controls built-in such as enabling NetStream publishing for video conferencing, or moderating discussion for a chat window. One very common approach is running a slide presentation, where one Flash movie has the capability to advance slides and publish an audio video stream, while a second (public) Flash movie cannot do anything but watch the presentation.


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