Inline Java compilation in ColdFusion 9s VFS with java loader

I was reading over the changes in Mark Mandels latest release of JavaLoader and noticed that it can now compile .java on the fly. That was pretty cool in itself but got me thinking.

I could now theoretically write java code inline, write it out to a file and let javaloader compile and load the class for me then clean up the file for the next run. I tried it and it worked.

I then ask Mark if it works with ColdFusion 9's VFS ( Virtual File System ). Mark hadn't tried this and wasn't sure so I gave it a go.

Guess what. Yep it works perfectly.

Here is the code and an image of the output:

Here is the actual code Running:

http://cf9.kukiel.net/demos/java/



<cfset temp="hash(now())"><br /> <cfdirectory action="create" directory="ram://#temp#/"><br /> <cfdirectory directory="ram:/#temp#/" name="files" recurse="true"><br /> <br /> <cfdump hide="attributes,mode" var="#files#"><br /> <br /> <cfsavecontent variable="source"><br /> public class HelloWorld{<br /> public HelloWorld(){<br /> //do nothing<br /> }<br /> <br /> public String hello(){<br /> return "Hello World from Ram VFS - #temp#";<br /> }<br /> }<br /> </cfsavecontent><br /> <br /> <cffile action="write" file="ram://#temp#/HelloWorld.java" output="#source#"><br /> <br /> <cfdirectory directory="ram://#temp#/" name="files" recurse="true"><br /> <br /> <cfdump hide="attributes,mode" var="#files#"><br /> <br /> <cfscript><br /> /*<br /> An array of source paths to be dynamically compiled by JavaLoader.<br /> In this case we are just loading the ./src directory <br /> */<br /> sourcePaths = ['ram://#temp#/'];<br /> <br /> /*<br /> While we can combine .jar loading and compilation, we are just going to compile <br /> and load our HelloWorld example from its source. <br /> */<br /> loader = createObject("component","jl.JavaLoader").init(sourceDirectories=sourcePaths);<br /> <br /> //create an instance of hello world<br /> VFSJavaObj = loader.create("HelloWorld").init();<br /> </cfscript><br /> <br /> <br /> I say: Hello Java! <br /> <br /> Java says:<br /> <br /> <cfoutput>#VFSJavaObj.hello()#</cfoutput><br /> <br /> <cfdump var="#VFSJavaObj#"><br /> <br />