ColdFusion Script not work with Httpservice

Question

At first I use PHP to generate xml output on page then use
the data to my httpservice with resultformat e4x. Everything is
fine. But now I want to use coldfusion script since I'm planning to
use ColdFusion as my web server. I have this script located on my
server and generate the data in XML file then the XML file is used
in my web, loaded through httpservice.
My PHP code was like this :
<?php
define( "DATABASE_SERVER", "localhost" );
define( "DATABASE_USERNAME", "root" );
define( "DATABASE_PASSWORD", "" );
define( "DATABASE_NAME", "MyCinema" );
$mysql = mysql_connect(DATABASE_SERVER, DATABASE_USERNAME,
DATABASE_PASSWORD) or die(mysql_error());
mysql_select_db( DATABASE_NAME );
$Query = "SELECT * FROM film";
$Result = mysql_query( $Query );
$Return = "<movies>";
while ( $film = mysql_fetch_object( $Result ) )
$Return .= "<film><judul>".$film->JUDUL.
"</judul><deskripsi>".$film->DESKRIPSI.
"</deskripsi><genre>".$film->GENRE.
"</genre><produser>".$film->PRODUSER.
"</produser><produksi>".$film->PRODUKSI.
"</produksi><homepage>".$film->HOMEPAGE.
"</homepage><durasi>".$film->DURASI.
"</durasi><url>".$film->URL."</url></film>";
$Return .= "</movies>";
mysql_free_result( $Result );
print ($Return);
?>
And now I try to get the same result using coldfusion script.
At first I dont write the XML to file, I just cfoutput it just like
I do with PHP just print result but it doesnt work out with my
HTTPservice. Until I try to write it to XML file then coding my
httpservice to read directly from that XML file. here is my
coldfusion code.
<cfcomponent>
<cffunction name="a" returnType="Void" output="true"
access="remote">
<cfprocessingdirective suppresswhitespace="Yes">
<cfquery name="GetFilm" datasource="myCinemaData">
SELECT b.* FROM playing a, film b
WHERE a.kode_film=b.kode_film AND a.start >
<cfqueryPARAM value = "#DateFormat(Now())#"
CFSQLType = "CF_SQL_STRING">
</cfquery>
<cfxml variable="userXML">
<movies>
<cfloop query="GetFilm">
<cfoutput>
<film>
<judul>#GetFilm.JUDUL#</judul>
<deskripsi>#GetFilm.DESKRIPSI#</deskripsi>
<genre>#GetFilm.GENRE#</genre>
<produser>#GetFilm.PRODUSER#</produser>
<produksi>#GetFilm.PRODUKSI#</produksi>
<homepage>#GetFilm.HOMEPAGE#</homepage>
<durasi>#GetFilm.DURASI#</durasi>
<url>#GetFilm.URL#</url>
</film>
</cfoutput>
</cfloop>
</movies>
</cfxml>
</cfprocessingdirective>
<cffile action="write"
file="#expandPath(".")#\userXML.xml" output="#userXML#">
</cffunction>
</cfcomponent>
Because I need to create the XML files first I try to execute
this coldfusion script first using webservice before I execute my
Httpservice but the XML file creation is slower than the execution
of my httpservice afterthat so it shows an error that my XML file
isn't not available. What can i do? I've tried to show the output
using cfoutput and run that script directly on my httpservice just
like the way I use print result on PHP but it produce an
error.

Answer 1

... I try to execute this coldfusion script first using
webservice before I execute my Httpservice but the
XML file creation is slower than the execution of
my httpservice afterthat so it shows an error
that my XML file isn't not available.
Then it might help to apply a named lock to ensure that the
Httpservice runs only after the web service call is complete. For
example, apply an exclusive named lock on the code that calls the
web service and a readonly lock of the same name to the Coldfusion
code that interacts with the Httpservice.