| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.tuscany.sca.implementation.python.provider; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.tuscany.sca.assembly.ComponentProperty; |
| import org.apache.tuscany.sca.assembly.ComponentReference; |
| import org.apache.tuscany.sca.core.invocation.ProxyFactory; |
| import org.apache.tuscany.sca.implementation.python.PythonEval; |
| import org.apache.tuscany.sca.implementation.python.PythonImplementation; |
| import org.apache.tuscany.sca.implementation.python.PythonProperty; |
| import org.apache.tuscany.sca.interfacedef.Operation; |
| import org.apache.tuscany.sca.invocation.Invoker; |
| import org.apache.tuscany.sca.provider.ImplementationProvider; |
| import org.apache.tuscany.sca.runtime.RuntimeComponent; |
| import org.apache.tuscany.sca.runtime.RuntimeComponentService; |
| import org.apache.tuscany.sca.runtime.RuntimeEndpointReference; |
| import org.python.core.Py; |
| import org.python.core.PyObject; |
| import org.python.core.PyString; |
| import org.python.core.PySystemState; |
| import org.python.core.PyTuple; |
| import org.python.util.PythonInterpreter; |
| |
| /** |
| * Implementation provider for Python component implementations. |
| * |
| * @version $Rev$ $Date$ |
| */ |
| class PythonImplementationProvider implements ImplementationProvider { |
| final RuntimeComponent component; |
| final PythonImplementation implementation; |
| PythonInterpreter python; |
| PyObject callable; |
| ProxyFactory pxFactory; |
| |
| PythonImplementationProvider(final RuntimeComponent comp, final PythonImplementation impl, ProxyFactory pxf) { |
| component = comp; |
| implementation = impl; |
| pxFactory = pxf; |
| } |
| |
| public void start() { |
| final PySystemState pss = new PySystemState(); |
| pss.path.insert(0, new PyString(implementation.getLocation())); |
| pss.path.insert(0, new PyString(getClass().getProtectionDomain().getCodeSource().getLocation().getFile())); |
| python = new PythonInterpreter(null, pss); |
| python.exec("from invoker import *"); |
| |
| final List<PyObject> px = new ArrayList<PyObject>(); |
| for(final ComponentReference r: component.getReferences()) { |
| final PythonEval pe = pxFactory.createProxy(PythonEval.class, (RuntimeEndpointReference)r.getEndpointReferences().get(0)); |
| px.add(Py.java2py(new PythonEval() { |
| @Override |
| public String eval(final String args) throws Exception { |
| final String v = pe.eval(args); |
| return v; |
| } |
| })); |
| } |
| final List<PyObject> pr = new ArrayList<PyObject>(); |
| for(final ComponentProperty p: component.getProperties()) { |
| final String v = String.valueOf(p.getValue()); |
| pr.add(Py.java2py(new PythonProperty() { |
| @Override |
| public String eval() { |
| return v; |
| } |
| })); |
| } |
| |
| PyObject mkc = python.get("mkcomponent"); |
| callable = mkc.__call__(new PyString(component.getName()), new PyString(implementation.getScript()), new PyTuple(px.toArray(new PyObject[0])), new PyTuple(pr.toArray(new PyObject[0]))); |
| } |
| |
| public void stop() { |
| python.cleanup(); |
| } |
| |
| public boolean supportsOneWayInvocation() { |
| return false; |
| } |
| |
| public Invoker createInvoker(final RuntimeComponentService s, final Operation op) { |
| return new PythonInvoker(python, callable, op); |
| } |
| } |