Installation guide

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Execution of CFASSERT (and the assert() function) is controlled by the “Enable Asser-

tions” setting on the “Debug Settings” page of the BlueDragon Administration console.

After changing this setting, you must restart the server.

If the “Enable Assertions” option is checked, then

CFASSERT tags and assert() func-

tions are enabled, otherwise they are not and are simply ignored when encountered. This

means that assertions can be left in code placed into production, where the Admin setting

would be set to disable assertions. There is no cost to assertions existing in code when

they are disabled. Assertions are supported in all editions of BlueDragon.

4.5.2 CFBASE

CFBASE is a CFML tag introduced by BlueDragon that is primarily intended for use in

BlueDragon for J2EE Servers. The CFBASE tag can be used to create an absolute URL

that serves as the base for resolving relative URLs within a CFML page (such as in

IMG

tags). The absolute URL created by the

CFBASE tag includes the J2EE web application

context path. See the document

Deploying CFML on Application J2EE Servers for a detailed

discussion of

CFBASE.

4.5.3 CFCONSTRUCTOR

BlueDragon has added a feature to make creation of “constructor” logic in CFCs more

explicit with

CFCONSTRUCTOR. An example follows:

</cfconstructor>

</cffunction>

</cfcomponent>

The semantics are similar to how a Java object works in that you use init() to explicitly

call the constructor. If you don't call it explicitly, it is implicitly called the first time you

use a method. As with Java objects, defining a constructor and a method named init is

not supported. (A method named

init is permissible in a CFC, to remain backward com-

patible with CFMX, unless you use

CFCONSTRUCTOR.)

If a component uses

CFCONSTRUCTOR, its code will be executed (constructed) either

implicitly upon first access or explicitly by invoking an

init method when invoking the

CFC.

CFCONSTRUCTOR creates a specially flagged init method. Components that simply

have

init methods without using CFCONSTRUCTOR do not get implicit construction.

Also, BlueDragon supports the implicit constructor notion offered by CFMX, where any

code inside a component that’s not within a

CFFUNCTION is also executed the first time

any method in a component is called.

For additional information on CFC method processing, see Section 6.5.

BlueDragon 6.1 CFML Compatibility and Reference Guide 24