Re: call python from java - what strategy do you use?

[Andi Vajda]

 Hi Roman,
On Wed, 12 Jan 2011, Roman Chyla wrote:

Thanks for the help, now I was able to run the java and loaded
PythonVM. I then built the python egg, after a bit of fiddling with
parameters, it seems ok. I can import the jcc wrapped python class and
call it:

In [1]: from solrpie_java import emql

Why are you calling your class EMQL ? (this name was just an example culled 
from my code).

In [2]: em = emql.Emql()

In [3]: em.javaTestPrint()
java is printing

In [4]: em.pythonTestPrint()
just a test

But I haven't found out how to call the same from java.

Ah, yes, I forgot to tell you how to pull that in.
In Java, you import that 'EMQL' java class and instantiate it by way of the 
PythonVM instance's instantiate() call:

            import org.blah.blah.EMQL;
            import org.apache.jcc.PythonVM;

            .............

            PythonVM vm = PythonVM.get();

            emql = (EMQL) vm.instantiate("jemql.emql", "emql");
            ... call method on emql instance just created ...

The instantiate("foo", "bar") method in effect asks Python to run
  "from foo import bar"
  "return bar()"

Andi..