Thread: Re: [tcljava-user] A question involving expect,java and tcl

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Hello Venugopal,
My understanding is that your requirement is to use the java based telnet client as like any other telnet client.
Also, you are not going to add any extra code to this client for any added functionality.
I believe, from your example, all you want to do is automate the telnet process what you are doing manually now.

If this is the case, you dont have to use TclBlend for this purpose.
A simple expect script will serve the purpose.

-Shibu

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Today's Topics:

   1. A question involving expect,java and tcl
      (ven...@wi...)
   2. Re: A question involving expect,java and tcl (Tom Poindexter)
   3. Re: A question involving expect,java and tcl (Patrick Finnegan)

----------------------------------------------------------------------

Message: 1
Date: Wed, 5 Mar 2008 18:34:05 +0530
From: <ven...@wi...>
Subject: [tcljava-user] A question involving expect,java and tcl
To: <tcl...@li...>
Message-ID:
    <7F24577C3B4C0F4191E30AC803615978024E4201@BLR-EC-MBX01.wipro.com>
Content-Type: text/plain; charset="iso-8859-1"

Hi,

I have a telnet client application written in java.

The telnet application which is written in java is generally invoked from my Windows PC as below:
java -jar telnetserver.jar <portnumber of the server>

I want to interact with this telnet client in a tcl script using Expect.
I read some articles informing that Tclblend allows me to interact with java application from a Tcl script.
But I couldn't find exact information about how Expect can be used along with java application inside a Tcl script.

Please let me know how can I accomplish this task.

The below snippet is what I'm thinking of using to perform this task.
Please correct me incase I miss something.

++++++++++++++++++++++++++++++
package require Expect
package require Java

#Spawn a telnet session to the telnet server running on the target device
spawn java -jar telnetserver.jar <port number where Telnet server is listening>

expect "*in:"
send "<username>\r"
expect "*Password:"
send "<password>\r"

#Put a expression which you expect at the command prompt
# For example:
# A prompt like "[anil@Testers anil]$" requires
# expect "*anil]$ " 
expect "<expression which we expect at the command prompt><space>"
++++++++++++++++++++++++++++++++++

Thanks In Advance,
Venu Gopal V
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Message: 2
Date: Wed, 5 Mar 2008 07:21:48 -0700
From: Tom Poindexter <tpo...@ny...>
Subject: Re: [tcljava-user] A question involving expect,java and tcl
To: A list for users of tcljava <tcl...@li...>
Message-ID: <200...@ny...>
Content-Type: text/plain; charset=us-ascii

On Wed, Mar 05, 2008 at 06:34:05PM +0530, ven...@wi... wrote:

> I want to interact with this telnet client in a tcl script using Expect.
> I read some articles informing that Tclblend allows me to interact with java application from a Tcl script.
> But I couldn't find exact information about how Expect can be used along with java application inside a Tcl script.

There is already a port of Expect for Jacl, see the message from
Justin Ryan in this thread:

http://sourceforge.net/mailarchive/forum.php?thread_name=67e5f3da0711080735k4820242ascc219f87c52ac45d%40mail.gmail.com&forum_name=tcljava-user

Justin's code is available at:
http://code.google.com/p/expect4j/

-- 
Tom Poindexter
tpo...@ny...

------------------------------

Message: 3
Date: Wed, 5 Mar 2008 15:24:53 +0000
From: Patrick Finnegan <pfi...@oz...>
Subject: Re: [tcljava-user] A question involving expect,java and tcl
To: A list for users of tcljava <tcl...@li...>
Message-ID: <200...@oz...>
Content-Type: text/plain;  charset="iso-8859-15"

On Wednesday 05 March 2008 13:04:05 ven...@wi... wrote:
> Hi,
>
> I have a telnet client application written in java.
>
> The telnet application which is written in java is generally invoked from
> my Windows PC as below: java -jar telnetserver.jar <portnumber of the
> server>
>
> I want to interact with this telnet client in a tcl script using Expect.
> I read some articles informing that Tclblend allows me to interact with
> java application from a Tcl script. But I couldn't find exact information
> about how Expect can be used along with java application inside a Tcl
> script.
>
> Please let me know how can I accomplish this task.
>
> The below snippet is what I'm thinking of using to perform this task.
> Please correct me incase I miss something.
>
> ++++++++++++++++++++++++++++++
> package require Expect
> package require Java
>
> #Spawn a telnet session to the telnet server running on the target device
> spawn java -jar telnetserver.jar <port number where Telnet server is
> listening>
>
> expect "*in:"
> send "<username>\r"
> expect "*Password:"
> send "<password>\r"
>
> #Put a expression which you expect at the command prompt
> # For example:
> # A prompt like "[anil@Testers anil]$" requires
> # expect "*anil]$ "
> expect "<expression which we expect at the command prompt><space>"
> ++++++++++++++++++++++++++++++++++
>
> Thanks In Advance,
> Venu Gopal V

TclBlend launches it's own Jvm and can act as a java client to a remote java 
application only if Jvm interprocess communication is available i.e. where an 
application running on the remote Jvm is configured to listen on a specific 
port.  In your case it seems that the application "telnetserver.jar" runs in 
a remote Jvm launched by the " java -jar telnetserver.jar" command and 
listens for telnet connections.  Just use expect as the telnet client and 
spawn a connection to the remote java telnet server from Tcl Blend.   

package require Expect

spawn telnet $host 

On the other hand if you want to manipulate "telnetserver.jar" then it needs a 
programming api or a jmx management interface.  

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