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+/*
+ * 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.script;
+
+import java.io.StringReader;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+import javax.script.Invocable;
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineManager;
+import javax.script.ScriptException;
+
+import org.apache.axiom.om.OMElement;
+import org.apache.bsf.xml.XMLHelper;
+import org.apache.tuscany.sca.assembly.ComponentReference;
+import org.apache.tuscany.sca.assembly.ComponentType;
+import org.apache.tuscany.sca.assembly.Property;
+import org.apache.tuscany.sca.assembly.Reference;
+import org.apache.tuscany.sca.assembly.Service;
+import org.apache.tuscany.sca.core.factory.ObjectCreationException;
+import org.apache.tuscany.sca.core.factory.ObjectFactory;
+import org.apache.tuscany.sca.extension.helper.InvokerFactory;
+import org.apache.tuscany.sca.extension.helper.utils.PropertyValueObjectFactory;
+import org.apache.tuscany.sca.implementation.script.engines.TuscanyJRubyScriptEngine;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+/**
+ *
+ * @version $Rev$ $Date$
+ */
+public class ScriptInvokerFactory implements InvokerFactory {
+
+ protected ScriptEngine scriptEngine;
+ protected XMLHelper xmlHelper;
+
+ protected RuntimeComponent rc;
+ protected ComponentType ct;
+ protected ScriptImplementation implementation;
+ protected PropertyValueObjectFactory propertyFactory;
+
+
+ /**
+ * @param rc
+ * @param ct
+ * @param implementation
+ * @param propertyFactory
+ */
+ public ScriptInvokerFactory(RuntimeComponent rc,
+ ComponentType ct,
+ ScriptImplementation implementation,
+ PropertyValueObjectFactory propertyFactory) {
+ super();
+ this.rc = rc;
+ this.ct = ct;
+ this.implementation = implementation;
+ this.propertyFactory = propertyFactory;
+ }
+
+ public Invoker createInvoker(Operation operation) {
+ init(rc, ct, implementation, propertyFactory);
+ return new ScriptInvoker(scriptEngine, xmlHelper, operation);
+ }
+
+ protected synchronized void init(RuntimeComponent rc, ComponentType ct, ScriptImplementation implementation, PropertyValueObjectFactory propertyFactory) {
+ if(scriptEngine!=null) {
+ return;
+ }
+ try {
+ scriptEngine = getScriptEngineByExtension(implementation.getScriptLanguage());
+ if (scriptEngine == null) {
+ throw new ObjectCreationException("no script engine found for language: " + implementation.getScriptLanguage());
+ }
+ if (!(scriptEngine instanceof Invocable)) {
+ throw new ObjectCreationException("script engine does not support Invocable: " + scriptEngine);
+ }
+
+ for (Reference reference : ct.getReferences()) {
+ scriptEngine.put(reference.getName(), createReferenceProxy(reference.getName(), rc));
+ }
+
+ for (Property property : ct.getProperties()) {
+ ObjectFactory<?> propertyValueFactory = propertyFactory.createValueFactory(property);
+ if ( propertyValueFactory != null) {
+ scriptEngine.put(property.getName(), propertyValueFactory.getInstance());
+ }
+ }
+
+ scriptEngine.eval(new StringReader(implementation.getScriptSrc()));
+
+ } catch (ScriptException e) {
+ throw new ObjectCreationException(e);
+ }
+
+ // set the databinding and XMLHelper for WSDL interfaces
+ for (Service service : rc.getServices()) {
+ InterfaceContract ic = service.getInterfaceContract();
+ if ("org.apache.tuscany.sca.interfacedef.wsdl.WSDLInterfaceContract".equals(ic.getClass())) {
+ // Set to use the Axiom data binding
+ ic.getInterface().resetDataBinding(OMElement.class.getName());
+ xmlHelper = XMLHelper.getArgHelper(scriptEngine);
+ }
+ }
+ }
+
+ /**
+ * TODO: RuntimeComponent should provide a method like this
+ */
+ @SuppressWarnings("unchecked")
+ protected Object createReferenceProxy(String name, RuntimeComponent component) {
+ for (ComponentReference reference : component.getReferences()) {
+ if (reference.getName().equals(name)) {
+ Class iface = ((JavaInterface)reference.getInterfaceContract().getInterface()).getJavaClass();
+ return component.getComponentContext().getService(iface, name);
+ }
+ }
+ throw new IllegalArgumentException("reference " + name + " not found on component: " + component);
+ }
+
+ /**
+ * Hack for now to work around a problem with the JRuby script engine
+ */
+ protected ScriptEngine getScriptEngineByExtension(String scriptExtn) {
+ if ("rb".equals(scriptExtn)) {
+ return new TuscanyJRubyScriptEngine();
+ } else {
+ if ("py".equals(scriptExtn)) {
+ pythonCachedir();
+ }
+ // Allow privileged access to run access classes. Requires RuntimePermission
+ // for accessClassInPackage.sun.misc.
+ ScriptEngineManager scriptEngineManager =
+ AccessController.doPrivileged(new PrivilegedAction<ScriptEngineManager>() {
+ public ScriptEngineManager run() {
+ return new ScriptEngineManager();
+ }
+ });
+ return scriptEngineManager.getEngineByExtension(scriptExtn);
+ }
+ }
+
+ /**
+ * If the Python home isn't set then let Tuscany suppress messages other than errors
+ * See TUSCANY-1950
+ */
+ protected void pythonCachedir() {
+ if (System.getProperty("python.home") == null) {
+ System.setProperty("python.verbose", "error");
+ }
+ }
+}