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

[Patrick F. <pfi...@oz...>]

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.