[Jython-dev] Singleton instances of PySystemState and "__import__" in a Multi-Thread Environment

[Rotsen M. <rot...@gm...>]

Hi guys,

A question about thread-safety:

>From a concurrency point of view, is it safe to have singleton instances of
PySystemState and "__import__"
serving parallel requests coming from different Threads?

Something like the code bellow (based on
http://www.jython.org/jythonbook/en/1.0/JythonAndJavaIntegration.html#more-efficient-version-of-loosely-coupled-object-factory
*)*:


import org.python.core.Py;
import org.python.core.PyObject;
import org.python.core.PySystemState;

public class JythonBeanFactory {

    private static PySystemState state = new PySystemState();
    private static PyObject importer =
state.getBuiltins().__getitem__(Py.newString("__import__"));

    public Object createObject(String moduleName, String className) {
        PyObject module = importer.__call__(Py.newString(moduleName));
        PyObject klass = module.__getattr__(className);
        return klass.__call__().__tojava__(Object.class);
    }
}

Thank you,

Rotsen