Time out inside a servlet

[Frank Hamilton]

Hi,

I need to implement a time out system inside a doget servlet method. This method try to connect with a nfs server, if It not respond in 5 second then i need to redirect a error.jsp page.
Can somebody tell my what is the best way to do this work.
Thank so much.

[Jatin Dhingra]

As I guess, you would be using while(true) loop to get connected to the server. Make a variable that holds system time when servlet was instantiated( out of while loop) and make other variable that notes system time each time while loop is executed ( it will be inside while loop). Then inside while loop, check condition that if difference between two "time variables" is more than 5 seconds execute a break statement.

does that sound helpful ?

[Frank Hamilton]

thank so much Jatin,

I think this solution not work for me.
Inside my servlet I use WEBNFS for creating a nfs client and access to a remote directory. I need a time out if the nfs server is down but I think this api don't give me any mechanism for me pourpose. Therefore I think any mechanism, maybe a thread, can help me.
This is my code:

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
     String user=properties.getProperty("user");
     String serverPath=properties.getProperty("nfshome");
     String initialUser=user.substring(0, 1);
     String filePaht=year+"/"+month+"/"+initialUser+"/"+user+".pdf";
     XFile file = new XFile(serverPath+filePaht);
     boolean exists=file.exists();
}

I think your solution not work because the file.exist() method wait for the connexion and the time variable inside the while never increment.

Anybody can help me with this problem?. I think nsf is over tcp protocolo and maybe can use some tcp connector method try to connect with nfs server and if the server is down this method throw a timeout.

[Madhan Sundararajan Devaki]

Please initiate/run a TimerTask from your Servlet, for the duration required and try to get a feedback from it. Based on what it returns, you can take the next step.

[Frank Hamilton]

Hi Madhan, thanks for your replay.

I solved my problem with the information in this post http://www.coderanch.com/t/533484/java/java/NFS-time-out, it's work fine for me. I'll probe TimerTask when I have same time, it's looking good.

Thank.