Re: newbie question: the steps of a making a ping service

From: Raymond DeCampo (rdecampo_at_spam.twcny.spam.rr.spam.com.spam)
Date: 07/25/04 

Date: Sat, 24 Jul 2004 22:22:15 GMT

lawrence wrote:
> I want to store a list of web addresses in a flat file, and then, once
> a week, have an application open that flat file, read the addresses
> into an array, then loop though that array and open the pages. The
> point of this service is mostly to call certain PHP scripts that are
> in certain web pages. I could do this as a shell script called by
> cron, but I think doing this in Java would be more portable, and I
> need to use this service from several servers.
>
> So I'm asking what are the steps involved in making this script?
>
> I need an application that runs forever on the server.
>
> It needs a timer to call it once a week.

Personally, I would defer this part to cron (Unix) or Scheduled Tasks
(Windows). If you are determined to do it in Java, look at
java.util.Timer or roll your own using Thread.sleep().

>
> It need to open a flat file.

Look at the java.io package.

>
> It needs to read a list into an array.

This is straight-forward. You may want to consider using a java.util.List.

>
> It needs to loop through that array.
>
> It needs to attempt to open the pages at the addresses in that array.

Look at java.net.URL.

>
> I've nearly no experiences with Java, so whatever advice you can give
> a beginner, I'm grateful.

I assume you have some experience in other languages. If so, this
should make a good first project for Java.

HTH,
Ray 

-- 
XML is the programmer's duct tape.

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