Help neede on a kind of server push

[terrordrone]

Hello,

 

I have the following issue.. and i need some advice and ideas on how do i accomplish this.

 

Lets say i simple java program that i can run on a server (prog A) which outputs 1 to N on the console with a delay of approx 1sec after each number.

 

Now from prog B .. i do system.getruntime().exec("java progA 10") (N = 10)

im able to capture the output of progA in progB using a buffered reader

 

assuming progA and progB are on the server.. how do i make progB's output visible on the client in real time.. (something like a push from progB)

 

The client has to be a browser.

 

Ideas, pointers, tutorials etc will help me a great deal.

 

Thanks in advance.

[corbin]

Not sure if this should technically be in Other Languages (since it appears to pertain to Java), but I know for sure it shouldn't have been in Client->Other.

 

Anyway, you will not be able to use a buffered reader.  (Well, not in the sense you mean anyway.)

 

Not sure how this would work in Java, but you will need to open a stream from the program (never done it before in Java).  In other words stdout (or what ever it's called in Java) from progA will need to be piped to a stream in progB some how...

 

 

Oh, here's a question by the way...  Is progB constantly running, or does it only run once?  If it only runs once, you could do:

 

progA 10 | progB

 

And progA's stdout would be piped into progB's stdin.

 

 

 

Anyway, once you figure out how to pipe output from progA's stdout into a stream in progB (sorry I can't help you with that x.x), then you can just use a blocking stream and read and output 1 byte at a time.

 

 

You'll want to come up with a better solution though, like checking how much data is available and reading that or using non blocking reading if you're even going to transfer a lot of data since reading 1 byte at a time isn't exactly optimal.