php java批处理

Question

I work in Linux. I have 3 file (about 2Gb each containing human genome sequence). I have java codes to process those files via web interface developed in PHP. The processing time is about 24 hours or even more.

How can i run the Java code from PHP so that the processing does not terminate when I close the browser.

Since the processing time is so long, it is not practicable to keep the browser open until the process get completed.

I assume it requires batch processing.

Answer 1

As far as I understand your question you want to call your java code from the PHP? correct? so here is the solution

<?php
    //use system call to execute java class or jar
    system('java yourclass', $retval);
?>

use the above php script. to execute your java code.

To get the process inforamtion see follwoing

PHP getting process information

Answer 2

May I suggest that if you have access to the source code, you can actually make use of Java RMI and the launch all your processing from within RMI. That way you can remove PHP from the equation.

Then again, if you really need the PHP to set some variables or settings before you begin, you can write those to a file before you use Java RMI to begin your processing.

If you need a tutorial on how to get RMI working you can refer to:

http://download.oracle.com/javase/tutorial/rmi/index.html

Cheers!

Answer 3

This is my proposed solution:

1) Create a db table or a config file where to store a flag, "add_process_to_queue" for example.

2) From your PHP panel, you could set this flag to 1

3) Set up a cron job that checks for this flag and if it is set to 1, the job resets to 0 and starts the Java program

Answer 4

Based on your comment, the approach used in the accepted answer for php execute a background process should do just fine. Just start the process, fetch the process id and store it in a DB together with the user that started the process (or use a filename that can be used to identify the user that started it). Using the isRunning method provided (that just does a ps for the process id provided) you can check if the process is still running.

Answer 5

In Unix/Linux, if you want to start a process that runs on the background, you must add & character at the end of the command.

> java blabla &

so, call shell_execute() like this:

shell_execute('java blabla &')

So it will continue processing after your script ended.