Calling a Java program in Ruby and getting output

Question

I want my Rails app to call a Java program to do some labor-intensive work. What's the best way to get the output from the Java program into Ruby? The output is text, about 60,000 chars per query.

Is there a better way than writing/reading from textfiles?

I don't want to use JRuby.

Does "labor-intensive" mean you want it to happen asynchronously? — Abe Voelker
– Abe Voelker, Commented Apr 19, 2012 at 17:39
I think he means the java program does a lot of repetitive work. — SwiftMango
– SwiftMango, Commented Apr 19, 2012 at 17:44

SwiftMango · Accepted Answer · 2012-04-19 17:21:03Z

2

output = %x{java your_program.java}

answered Apr 19, 2012 at 17:21

SwiftMango

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bevanb Over a year ago

Nice. Thanks @texasbruce, just what I was looking for.

verrdon · Accepted Answer · 2012-04-19 18:01:45Z

1

Depends on scale. It could be worth actually setting up a messaging protocol such as RabbitMQ.

If you are just setting up a monitor or other script driven process, you could look at ruby's IO.popen, but that would still leave you parsing text streams.

answered Apr 19, 2012 at 18:01

verrdon

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