Webmaster Forum / ColdFusion / Advanced Techniques / February 2008

I'm having some trouble with .Net Integration. I have a .Net class that has one
function that takes a 3 parameters. It works fine from .Net. However, when I
try from ColdFusion, it can instantiate the object just fine (cfdump dumps the
object functions with the correct data types as parameters), but when I call
it, I just a very generic error. In fact, the error is so generic that it
offers no error details at all. All it gives me is the line number.

I even went so far as to remove 2 of the parameters from the .Net object so I
could remove any possible complexity. But I still get the same error.

The function basically takes the input strings and creates another .Net object
based on the input, which it then inserts into the Microsoft Messaging Queue.
The functionality of the classes work perfect in .Net. When I rebuild the
solution after I make changes, the changes are represented in the CFDump, so it
doesn't seem like it is trying to use a cached version of the .Net dll (but I'm
not 100% sure of that -- is there a way of clearing any cached .net objects? I
noticed the following directory:
Y:\ColdFusion8\wwwroot\WEB-INF\cfclasses\dotNetProxy which seems to have some
jar files with dates that match my .Net objects).

I just can't seem to figure out what is causing the error. The fact that it
doesn't tell me anything doesn't help! Here is the extent of the error message:

---------------------------------------------------------------
The error occurred in D:\Inetpub\NIAC-ANI-Core\TEST\MSMQ.cfm: line 37
 
35 :
36 : <!--- send message using the AMS Queue Manager --->
37 : [b]<cfset foo = obj_AMSQM.SendMessage( "hello" )>[/b]
38 :
39 :
---------------------------------------------------------------
 
In the past, when I've tried to pass in mis-typed or unhandled data-types into
the function it gave me this error:

------------------------------
Either there are no methods with the specified method name and argument types,
or the Set_MessageBody method is overloaded with argument types that ColdFusion
cannot decipher reliably. ColdFusion found 0 methods that matched the provided
arguments. If this is a Java object and you verified that the method exists,
you may need to use the javacast function to reduce ambiguity.
------------------------------

So, I don't think it I'm trying to pass a mistyped variable into the function.
But without error details, I'm not sure how to figure out what's wrong! I've
attached the CF code I'm using below.

This is the function output from the CF dump:
==================================================================
Class Name: MessageQueue.AMSQueueManager

Method            Return Type
--------------------------------------    ----------------------
SendMessage(java.lang.String)    boolean

==================================================================
 
I've also tried to implement some error logging within the .Net object to try
to capture the error as if it occurs in the .Net object, but log entries never
appear. That makes me think that the error is in CF before it even gets to the
.Net object.

In addition, I've also successfully loaded the other .Net class into CF (which
builds the object to be passed to the message queue passed on the params passed
into the first object). The CF Dump correctly displays the available functions.
Most of the SET functions work properly. But I have two different SETs that
pass in STRINGS. One of them works just fine, while the other gives me the same
generic, not details error. All of the GETs seem to work just fine, except the
one that is associated with the SET that is failing.

This is the CFDump info from the second object I tried:
==================================================================
Class Name: MessageQueue.AMSQueueMessage

Method                    Return Type
--------------------------------------                                   
----------------------
Get_MessageBody()                 System.Xml.XmlDocument
Get_MessageBodyStr()             java.lang.String
Get_MessageDate()                 System.DateTime
Get_MessageType()                 java.lang.String
Set_MessageBody(System.Xml.XmlDocument)     void
Set_MessageBodyStr(java.lang.String)                    void
Set_MessageDate(System.DateTime)         void
Set_MessageType(java.lang.String)         void

==================================================================

I'm able to use the Set_MessageType just fine, but the Set_MessageBodyStr
fails with the generic, no details error. To me, they look exactly the same. I
had one of our senior .Net guys look at my code (since I'm mainly CF with only
a bit of .Net) and he says it's perfect. I've attached the CF code I'm using
below.

I guess I'm looking for any info on either what I'm doing wrong or how to
track down the error...

Thanks!
Kevin

OBJECT 1
==============================\

<cfobject     name        = "obj_AMSQM"
            type        = ".NET"
            class        = "MessageQueue.AMSQueueManager"
            assembly    =
"D:\Inetpub\DotNetWebServices\MessageQueue\Real3\bin\MessageQueue.dll,C:\WINNT\M
icrosoft.NET\Framework\v2.0.50727\System.dll,C:\WINNT\Microsoft.NET\Framework\v2
.0.50727\System.Data.dll,C:\WINNT\Microsoft.NET\Framework\v2.0.50727\System.XML.
dll" />

<cfset foo = obj_AMSQM.SendMessage( javacast( "String", "hello" ) )><!--- this
fails --->
<cfset foo = obj_AMSQM.SendMessage( "hello" )><!--- this fails --->

OBJECT 2
==============================

<cfobject     name        = "obj_AMSQMess"
            type        = ".NET"
            class        = "MessageQueue.AMSQueueMessage"
            assembly    =
"D:\Inetpub\DotNetWebServices\MessageQueue\Real3\bin\MessageQueue.dll,C:\WINNT\M
icrosoft.NET\Framework\v2.0.50727\System.dll,C:\WINNT\Microsoft.NET\Framework\v2
.0.50727\System.Data.dll,C:\WINNT\Microsoft.NET\Framework\v2.0.50727\System.XML.
dll" />

<cfset obj_AMSQMess.Set_MessageType( "hello" )>
<cfset obj_AMSQMess.Set_MessageDate( Now() )>
<cfset obj_AMSQMess.Set_MessageBodyStr( "hello" )><!--- this fails --->

<cfoutput>
Message Type = "#obj_AMSQMess.Get_MessageType()#"<hr/>
Message Date = "#obj_AMSQMess.Get_MessageDate()#"<hr/>
Message Body = "#obj_AMSQMess.Get_MessageBodyStr()#"<hr/> <!--- this fails --->
Message Body = "#obj_AMSQMess.Get_MessageBody()#"<hr/>
</cfoutput>