MACROMEDIA COLDFUSION MX 7.0.2-USING COLDFUSION MX WITH FLEX..., Руководство пользователя

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42 Using the Flex Data Service Assembler
The sample services-config.xml file is located in the C:\fds2\resources\config folder, and
the web application flex-messaging-service.xml file is located in the
C:\fds2\jrun4\servers\default\samples\WEB-INF\flex folder when you install Flex in the
default location.
2.
(Optional) Turn on the ColdFusion-specific debugging output in the Flex console by
adding the following <pattern> tag in the <filters> tag in the <logging> section of the web
application services-config.xml file:
<pattern>DataService.coldfusion</pattern>
3.
Add the coldfusion-dao adapter to the web application data-management-config.xml (in
the C:\fds2\jrun4\servers\default\samples\WEB-INF\flex folder when you install Flex in
the default location) by adding the following in the <adapters> section:
<adapter-definition id="coldfusion-dao"
class="coldfusion.flex.CFDataServicesAdapter"/>
For more information, see “Configuring the Data Service” in Developing Flex Applications ,
which is included in the Flex documentation.
Writing the ColdFusion CFCs
The Flex Data Management Service recognizes the methods:
fill
,
get
,
sync
, and
count
.
The
fill
method retrieves records from a database and populates an array with the records.
The
get
method retrieves a specific record. The
sync
method lets you keep track of
synchronization conflicts by accepting a change list, which is an array of change objects. The
count
method returns a number that indicates how many records are in a result set. To
perform any of these database tasks, the Flex application calls the appropriate
fill
,
get
,
sync
, or
count
method in the assembler CFC. You can also use a
fillContains
method,
which checks whether to update the results of a fill. For more information, see “Managing
fills” on page 43 .
When you create the ColdFusion CFC, you include the database manipulation in the
methods in the assembler CFC or use the Bean/DAO methodology. For more information,
see
“Selecting a methodology” on page 43 .
NO
TE
The ColdFusion MX Administrator lets you enable or disable Flex Data Management
support. If you are running more than one instance of ColdFuison, you must use a unique
ID to specify each instance of ColdFusion for which you want to enable Flex Data
Management support. You do so by specifying the identity in the <identity> element of the
data-management-config.xml file.