MACROMEDIA COLDFUSION MX 7.0.2-USING COLDFUSION MX WITH FLEX 2 Betriebsanweisung Seite 25

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Flex deployment models 25
Support for large data sets Enterprise data applications often handle large data sets that
must be transmitted to the client from the server, or transmitted to the server from the client.
These large data sets can overwhelm the bandwidth of your network, and lead to sluggish
application performance. Flex Data Management Services, a feature of Flex Data Services, lets
you break large data sets into smaller units so that no single client can monopolize the
network.
Real-time data push Applications often share data among multiple clients. For example, an
inventory management system must keep all clients synchronized on product availability. One
way to implement this type of system is to have the clients poll the server at regular intervals
to check for updates. However, this design uses unnecessary network bandwidth and
processing cycles when no updates are available. Instead, Flex Data Services lets clients
subscribe to data objects on the server. When the server updates a data object, it then pushes
those updates out to all subscribing clients.
Occasionally connected clients Remote clients may not be able to maintain a connection
to the server at all times. These clients are called occasionally connected clients. Flex Data
Services let client applications perform offline data manipulation, and then automatically
send updates to the server when the connection is restored.
Flex deployment models
The Flex platform supports a range of deployment models:
Client-side only Applications run on the client and use no server resources.
Access server data through simple RPC services Applications interact with remote data
through web services and HTTP services.
Flex Data Services Applications use the enhanced data architecture of Flex Data Services
to provide advanced features, such as data synchronization, security, and messaging.
These models are discussed in the following sections, following a discussion of how you use
Flash Player with Flex.
Deploying Flex applications on Flash Player
The target of a Flex application is Flash Player. Flex supports two versions of Flash Player. Flex
application users install the standard Flash Player to run Flex applications. Flex also supports
the debug version of Flash Player, called Flash Debug Player. Flex application developers use
Flash Debug Player during the development process. Flash Debug Player, which is installed by
default with Flex Builder and Flex Data Services, supports important features for developers,
including the following:
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