I’m doing some research for an article I’m writing for Macromedia Devnet (hopefully to be published in May or June). I won’t go into the details of the article, but part of it deals (tangentially) with CFMX and Java integration. Specifically, I’m using CFMX to call a relatively simple Java API that consists of a couple methods, ie:

doSomething(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res, long someObject)

Looks pretty imposing doesn’t it? It’s actually pretty easy to call using CFMX.

<cfscript>
myObject = CreateObject(“java”, “com.thirdpartyApp.OtherClass”);
// retrieve the long value from the third party class
t = CreateObject(“java”, “com.thirdpartyApp.Class”);
longValue = t.SOME_CONSTANT;

// get a javax.servlet.http.HttpServletRequest object from CFMX
req = getPageContext().getRequest();

// get a javax.servlet.http.HttpServletResponse object from CFMX
res = getPageContext().getResponse();

myObject.doSomething(req, res, longValue);
</cfscript>

One interesting to note is that if you do getClass() on the req and res objects like this:

<cfoutput>#req.getClass()#</cfoutput>
<cfoutput>#res.getClass()#</cfoutput>

above you get the following class names:

req = jrun.servlet.ForwardRequest
res = coldfusion.jsp.JspWriterIncludeResponse

and although they don’t look like javax.servlet.http.HttpServletResponse and javax.servlet.http.HttpServletRequest objects, they actually extend the javax.servlet.ServletRequestWrapper and javax.servlet.ServletResponseWrapper classes, which are wrappers (as their names imply) for the javax.servlet.ServletRequest and javax.servlet.ServetResponse interfaces.

Anyway, interesting journey.. great help from Sean Corfield for his post about the getClass() method you can use to find out the type of an object and to Charlie Arehart for his comprehensive Java/CFMX archive.