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Diffstat (limited to '')
-rw-r--r-- | sca-java-2.x/tags/2.0-Beta1-RC2/modules/implementation-script-runtime/src/main/java/org/apache/tuscany/sca/implementation/script/provider/ScriptImplementationProvider.java | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0-Beta1-RC2/modules/implementation-script-runtime/src/main/java/org/apache/tuscany/sca/implementation/script/provider/ScriptImplementationProvider.java b/sca-java-2.x/tags/2.0-Beta1-RC2/modules/implementation-script-runtime/src/main/java/org/apache/tuscany/sca/implementation/script/provider/ScriptImplementationProvider.java new file mode 100644 index 0000000000..0938462c49 --- /dev/null +++ b/sca-java-2.x/tags/2.0-Beta1-RC2/modules/implementation-script-runtime/src/main/java/org/apache/tuscany/sca/implementation/script/provider/ScriptImplementationProvider.java @@ -0,0 +1,174 @@ +/* + * 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.provider; + +import java.io.IOException; +import java.io.InputStreamReader; +import java.net.URL; +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.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.implementation.script.ScriptImplementation; +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.interfacedef.wsdl.WSDLInterfaceContract; +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; + +/** + * An ImplementationProvider for Script implementations. + * + * @version $Rev$ $Date$ + */ +public class ScriptImplementationProvider implements ImplementationProvider { + + private RuntimeComponent component; + private ScriptImplementation implementation; + private ScriptPropertyFactory propertyFactory; + private ScriptEngine scriptEngine; + private XMLHelper xmlHelper; + + public ScriptImplementationProvider(RuntimeComponent component, ScriptImplementation implementation, ScriptPropertyFactory propertyFactory) { + this.component = component; + this.implementation = implementation; + this.propertyFactory = propertyFactory; + + // Set the databinding and XMLHelper for WSDL interfaces + for (Service service : component.getServices()) { + InterfaceContract ic = service.getInterfaceContract(); + if (ic instanceof WSDLInterfaceContract) { + ic.getInterface().resetDataBinding(OMElement.class.getName()); + xmlHelper = XMLHelper.getArgHelper(scriptEngine); + } + } + } + + public void start() { + try { + String language = implementation.getLanguage(); + if (language == null) { + language = implementation.getScript(); + language = language.substring(language.lastIndexOf('.') +1); + } + scriptEngine = scriptEngine(language); + if (scriptEngine == null) { + throw new ObjectCreationException("no script engine found for language: " + implementation.getLanguage()); + } + if (!(scriptEngine instanceof Invocable)) { + throw new ObjectCreationException("script engine does not support Invocable: " + scriptEngine); + } + + for (Reference reference : implementation.getReferences()) { + scriptEngine.put(reference.getName(), getProxy(reference.getName())); + } + + for (Property property : implementation.getProperties()) { + ObjectFactory<?> valueFactory = propertyFactory.createValueFactory(property); + if (valueFactory != null) { + scriptEngine.put(property.getName(), valueFactory.getInstance()); + } + } + + URL url = new URL(implementation.getLocation()); + InputStreamReader reader = new InputStreamReader(url.openStream()); + scriptEngine.eval(reader); + reader.close(); + + } catch (IOException e) { + throw new IllegalArgumentException(e); + } catch (ScriptException e) { + throw new IllegalArgumentException(e); + } + } + + public void stop() { + } + + public boolean supportsOneWayInvocation() { + return false; + } + + public Invoker createInvoker(RuntimeComponentService service, Operation operation) { + return new ScriptInvoker(scriptEngine, xmlHelper, operation); + } + + private Object getProxy(String name) { + 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); + } + + /** + * Returns the script engine for the given language. + * + * @param language + * @return + */ + private ScriptEngine scriptEngine(String language) { + if ("rb".equals(language)) { + + // Hack for now to work around a problem with the JRuby script engine + // return new TuscanyJRubyScriptEngine(); + } else { + if ("py".equals(language)) { + 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(language); + } + + /** + * If the Python home isn't set then let Tuscany suppress messages other than errors + * See TUSCANY-1950 + */ + private static void pythonCachedir() { + if (System.getProperty("python.home") == null) { + System.setProperty("python.verbose", "error"); + } + } +} |