Google Web Toolkit and JRUN

[Ed Zwart-2]

Hi, I'm trying to embed a GWT module in an existing CF app, and I'm using JRUN server included in Adobe CF8 Dev Edition. I'm getting a FileNotFound error and can't figure out what I'm doing wrong.

I've edited WEB-INF/web.xml like so...

<servlet>
        <servlet-name>FNWiz</servlet-name>
        <servlet-class>com.example.MyServiceImpl</servlet-class>
</servlet>

<servlet-mapping>
        <servlet-name>FNWiz</servlet-name>
        <url-pattern>/myapp/GWT_MODULES/com.example.MyApp/FNService</url-pattern>
</servlet-mapping>

The request from (GWT-generated) JavaScript looks like so:

http://localhost:8500/myapp/GWT_MODULES/com.example.MyApp/FNService

Here is the error I get:

404

java.io.FileNotFoundException
        at jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:94)
        at jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42)
        at jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:286)
        at jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:543)
        at jrun.servlet.http.WebService.invokeRunnable(WebService.java:172)
        at jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:320)
        at jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:428)
        at jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:266)
        at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)

Anyone have any idea what I'm doing wrong?  Thanks in advance!

By the way, if I request a URL that hasn't been mapped, the error looks a little different.  Not sure if that's helpful, but I include in case it is...

404

/myapp/GWT_MODULES/com.example.MyApp/FNServiceWRONG_URL


java.io.FileNotFoundException: /myapp/GWT_MODULES/com.example.MyApp/FNServiceWRONG_URL
        at jrun.servlet.file.FileServlet.service(FileServlet.java:349)
        at jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:106)
        at jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42)
        at jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:286)
        at jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:543)
        at jrun.servlet.http.WebService.invokeRunnable(WebService.java:172)
        at jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:320)
        at jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:428)
        at jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:266)
        at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)


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[Charlie Arehart-2]

Ed, you've not said where you put the class or JAR for the servlet. Take a
look at the CF docs on doing Java integration, specifically the ColdFusion
Developers Guide
(http://livedocs.adobe.com/coldfusion/8/htmldocs/Part_4_CF_DevGuide_1.html),
which has a chapter specifically on this topic: Integrating J2EE and Java
Elements in CFML Applications.

It clarifies that you put the servlet CLASS file in the
[CFserver]/WEB-INF/classes directory or a JAR file in
[CFserver]/WEB-INF/lib. Now, you say you're on JRun so I assume you mean
you're using the Multiserver deployment. In that case, my recollection is
that they should go in the web-inf/lib of the CF instance, such as:

c:\jrun4\servers\cfusion\cfusion-ear\cfusion-war\WEB-INF\lib

Can you confirm if any of the above helps?

/charlie


-----Original Message-----
From: Ed Zwart [mailto:ed.zwart@...]
Sent: Wednesday, June 11, 2008 4:35 PM
To: JRun-Talk
Subject: Google Web Toolkit and JRUN

Hi, I'm trying to embed a GWT module in an existing CF app, and I'm using
JRUN server included in Adobe CF8 Dev Edition. I'm getting a FileNotFound
error and can't figure out what I'm doing wrong.

I've edited WEB-INF/web.xml like so...

<servlet>
        <servlet-name>FNWiz</servlet-name>
        <servlet-class>com.example.MyServiceImpl</servlet-class>
</servlet>

<servlet-mapping>
        <servlet-name>FNWiz</servlet-name>
       
<url-pattern>/myapp/GWT_MODULES/com.example.MyApp/FNService</url-pattern>
</servlet-mapping>

The request from (GWT-generated) JavaScript looks like so:

http://localhost:8500/myapp/GWT_MODULES/com.example.MyApp/FNService

Here is the error I get:

404

java.io.FileNotFoundException
        at jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:94)
        at
jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42)
        at
jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:286)
        at
jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:543)
        at jrun.servlet.http.WebService.invokeRunnable(WebService.java:172)
        at
jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:
320)
        at
jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:428
)
        at
jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:26
6)
        at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)

Anyone have any idea what I'm doing wrong?  Thanks in advance!

By the way, if I request a URL that hasn't been mapped, the error looks a
little different.  Not sure if that's helpful, but I include in case it
is...

404

/myapp/GWT_MODULES/com.example.MyApp/FNServiceWRONG_URL


java.io.FileNotFoundException:
/myapp/GWT_MODULES/com.example.MyApp/FNServiceWRONG_URL
        at jrun.servlet.file.FileServlet.service(FileServlet.java:349)
        at jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:106)
        at
jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42)
        at
jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:286)
        at
jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:543)
        at jrun.servlet.http.WebService.invokeRunnable(WebService.java:172)
        at
jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:
320)
        at
jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:428
)
        at
jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:26
6)
        at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)




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[Ed Zwart-2]

Hey Charlie, thanks for the help.

Problem solved!!  Embarrassing, but potentially useful to someone, so
here goes...

I am using the single server instance, by the way, and was putting my
jar file in WEB-INF/lib, as you said.

The problem was with the jar file.  I was teaching myself Ant at the
same time, and just assumed that part was okay, but I had been jar'ing
the src folder instead of the bin one.  OOPS!

How I came to the solution though was by switching from CF 8 Dev (with
JRUN) to Open Blue Dragon (with Jetty).  Starting Jetty from the
command line gave me instant feedback about what was wrong, whereas
when I started CF as a Windows service (which starts JRUN), there's no
feedback to help lead me to the problem.

Thanks again for your help!  Nice to meet you.

e.





On Sat, Jun 14, 2008 at 4:51 PM, Charlie Arehart <charlie@...> wrote:

> Ed, you've not said where you put the class or JAR for the servlet. Take a
> look at the CF docs on doing Java integration, specifically the ColdFusion
> Developers Guide
> (http://livedocs.adobe.com/coldfusion/8/htmldocs/Part_4_CF_DevGuide_1.html),
> which has a chapter specifically on this topic: Integrating J2EE and Java
> Elements in CFML Applications.
>
> It clarifies that you put the servlet CLASS file in the
> [CFserver]/WEB-INF/classes directory or a JAR file in
> [CFserver]/WEB-INF/lib. Now, you say you're on JRun so I assume you mean
> you're using the Multiserver deployment. In that case, my recollection is
> that they should go in the web-inf/lib of the CF instance, such as:
>
> c:\jrun4\servers\cfusion\cfusion-ear\cfusion-war\WEB-INF\lib
>
> Can you confirm if any of the above helps?
>
> /charlie
>
>
> -----Original Message-----
> From: Ed Zwart [mailto:ed.zwart@...]
> Sent: Wednesday, June 11, 2008 4:35 PM
> To: JRun-Talk
> Subject: Google Web Toolkit and JRUN
>
> Hi, I'm trying to embed a GWT module in an existing CF app, and I'm using
> JRUN server included in Adobe CF8 Dev Edition. I'm getting a FileNotFound
> error and can't figure out what I'm doing wrong.
>
> I've edited WEB-INF/web.xml like so...
>
> <servlet>
>        <servlet-name>FNWiz</servlet-name>
>        <servlet-class>com.example.MyServiceImpl</servlet-class>
> </servlet>
>
> <servlet-mapping>
>        <servlet-name>FNWiz</servlet-name>
>
> <url-pattern>/myapp/GWT_MODULES/com.example.MyApp/FNService</url-pattern>
> </servlet-mapping>
>
> The request from (GWT-generated) JavaScript looks like so:
>
> http://localhost:8500/myapp/GWT_MODULES/com.example.MyApp/FNService
>
> Here is the error I get:
>
> 404
>
> java.io.FileNotFoundException
>        at jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:94)
>        at
> jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42)
>        at
> jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:286)
>        at
> jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:543)
>        at jrun.servlet.http.WebService.invokeRunnable(WebService.java:172)
>        at
> jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:
> 320)
>        at
> jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:428
> )
>        at
> jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:26
> 6)
>        at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)
>
> Anyone have any idea what I'm doing wrong?  Thanks in advance!
>
> By the way, if I request a URL that hasn't been mapped, the error looks a
> little different.  Not sure if that's helpful, but I include in case it
> is...
>
> 404
>
> /myapp/GWT_MODULES/com.example.MyApp/FNServiceWRONG_URL
>
>
> java.io.FileNotFoundException:
> /myapp/GWT_MODULES/com.example.MyApp/FNServiceWRONG_URL
>        at jrun.servlet.file.FileServlet.service(FileServlet.java:349)
>        at jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:106)
>        at
> jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42)
>        at
> jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:286)
>        at
> jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:543)
>        at jrun.servlet.http.WebService.invokeRunnable(WebService.java:172)
>        at
> jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:
> 320)
>        at
> jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:428
> )
>        at
> jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:26
> 6)
>        at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)
>
>
>
>
>

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[Ed Zwart-2]

Hey Charlie, thanks for the help.

Problem solved!!  Embarrassing, but potentially useful to someone, so
here goes...

I am using the single server instance, by the way, and was putting my
jar file in WEB-INF/lib, as you said.

The problem was with the jar file.  I was teaching myself Ant at the
same time, and just assumed that part was okay, but I had been jar'ing
the src folder instead of the bin one.  OOPS!

How I came to the solution though was by switching from CF 8 Dev (with
JRUN) to Open Blue Dragon (with Jetty).  Starting Jetty from the
command line gave me instant feedback about what was wrong, whereas
when I started CF as a Windows service (which starts JRUN), there's no
feedback to help lead me to the problem.

Thanks again for your help!  Nice to meet you.

e.

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[Dave Watts]

> How I came to the solution though was by switching from CF 8 Dev (with
> JRUN) to Open Blue Dragon (with Jetty).  Starting Jetty from
> the command line gave me instant feedback about what was
> wrong, whereas when I started CF as a Windows service (which
> starts JRUN), there's no feedback to help lead me to the problem.

You can start CF from the command line in the same way.

jrun -start instancename (typically "cfusion" or "coldfusion")

Dave Watts, CTO, Fig Leaf Software
http://www.figleaf.com/

Fig Leaf Software provides the highest caliber vendor-authorized
instruction at our training centers in Washington DC, Atlanta,
Chicago, Baltimore, Northern Virginia, or on-site at your location.
Visit http://training.figleaf.com/ for more information!

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[Ed Zwart-2]

I'm sure JRUN/CF can be started from the command line!

I should have said "_Being forced_ to start Jetty from the command
line...".  Feedback about failure when starting a Windows service
would still be useful though.  Although, that's probably an issue for
Windows and not JRUN.

Anyway, thanks for the heads up!

e.

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[Charlie Arehart-2]

Just a point of clarification. Even if you do run it as a service, the same
errors you would have seen at the command line are in the logs--not the CF
logs, but rather the [jrun]/logs (or in a standalone deployment of CF, it
would be the [cf]/runtime/logs), where you will find files like
cfusion-out.log (or in standalone, coldfusion-out.log.) Many do miss those
logs and they're very valuable. Granted, it's still on you to think to look
at them even if you know they exist! :-) And that's just not as easy as them
popping up in the command line, but as Dave showed that's possible too.
Still, the info is indeed there even when run as a service.

Hope that's helpful.

/charlie


-----Original Message-----
From: Ed Zwart [mailto:ed.zwart@...]
Sent: Monday, June 16, 2008 3:42 PM
To: JRun-Talk
Subject: Re: Google Web Toolkit and JRUN

I'm sure JRUN/CF can be started from the command line!

I should have said "_Being forced_ to start Jetty from the command
line...".  Feedback about failure when starting a Windows service
would still be useful though.  Although, that's probably an issue for
Windows and not JRUN.

Anyway, thanks for the heads up!

e.



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