MACROMEDIA COLDFUSION 4.5-DEVELOPING WEB Develop Manual page 230

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dynamic value for the NAME attribute to allow protection of a file with any given
name.
<CFLOCK NAME=#FileName# TIMEOUT=60 TYPE="Exclusive">
<CFFILE ACTION="Append"
</CFLOCK>
Example of protecting ColdFusion Extensions
This example illustrates how a custom tag wrapper can be built around CFXs that are
not thread-safe. The wrapper simply forwards attributes to the non thread-safe CFX
that is used inside a CFLOCK tag. An anonymous lock is used here because this is the
only place from which the CFX will be invoked.
<CFPARAM NAME="Attributes.AttributeOne" Default="">
<CFPARAM NAME="Attributes.AttributeTwo" Default="">
<CFPARAM NAME="Attributes.AttributeThree" Default="">
<CFLOCK TIMEOUT=10 TYPE="Exclusive">
<CFX_NOT_THREAD_SAFE AttributeOne=#Attributes.AttributeOne#
</CFLOCK>
Note
For more information
See the CFML Language Reference for more information on using CFLOCK.
FILE=#FileName#
OUTPUT=#TextToAppend#>
AttributeTwo=#Attributes.AttributeTwo#
AttributeThree=#Attributes.AttributeThree#>
This example assumes that this is the only instance this CFX is used in the
application. To lock a non-thread safe CFX that used multiple times in an
application, used named locking rather than anonymous locking,
specifying the same name for each lock.
Developing Web Applications with ColdFusion