diff options
Diffstat (limited to 'java/sca/modules/sca-client-javascript/src/main/java/org/apache/tuscany/sca/client/javascript/ScriptEngine.java')
| -rw-r--r-- | java/sca/modules/sca-client-javascript/src/main/java/org/apache/tuscany/sca/client/javascript/ScriptEngine.java | 662 |
1 files changed, 0 insertions, 662 deletions
diff --git a/java/sca/modules/sca-client-javascript/src/main/java/org/apache/tuscany/sca/client/javascript/ScriptEngine.java b/java/sca/modules/sca-client-javascript/src/main/java/org/apache/tuscany/sca/client/javascript/ScriptEngine.java deleted file mode 100644 index 92b2d13420..0000000000 --- a/java/sca/modules/sca-client-javascript/src/main/java/org/apache/tuscany/sca/client/javascript/ScriptEngine.java +++ /dev/null @@ -1,662 +0,0 @@ -/**
- *
- * Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
- *
- * Licensed 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.client.javascript;
-
-import java.io.BufferedReader;
-import java.io.CharArrayWriter;
-import java.io.File;
-import java.io.FileReader;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.io.PrintStream;
-import java.io.PrintWriter;
-import java.lang.reflect.Method;
-import java.net.URI;
-import java.net.URL;
-import java.net.URLClassLoader;
-import java.util.List;
-
-import org.apache.tuscany.sca.assembly.AssemblyFactory;
-import org.apache.tuscany.sca.assembly.Endpoint;
-import org.apache.tuscany.sca.assembly.EndpointReference;
-import org.apache.tuscany.sca.client.rmi.SCAClientFactoryImpl;
-import org.apache.tuscany.sca.core.ExtensionPointRegistry;
-import org.apache.tuscany.sca.core.FactoryExtensionPoint;
-import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
-import org.apache.tuscany.sca.runtime.EndpointRegistry;
-
-import sun.org.mozilla.javascript.internal.Context;
-import sun.org.mozilla.javascript.internal.Function;
-import sun.org.mozilla.javascript.internal.Scriptable;
-import sun.org.mozilla.javascript.internal.ScriptableObject;
-import sun.org.mozilla.javascript.internal.WrappedException;
-/**
- *
- * This class implements a Scripting Engine for the Tuscany runitme. This engine
- * uses the Rhino javaScript Engine.
- *
- * <p> The default script functions supported by this engine are the following:
- * <ul>
- * <li>echo</li>
- * <li>version</li>
- * <li>load</li>
- * <li>help</li>
- * <li>exit</li>
- * <li>printStackTrace</li>
- * <li>loadModule</li>
- * <li>listComponents</li>
- * <li>getComponent</li>
- * <li>listServices</li>
- * <li>getService</li>
- * </ul>
- */
-public class ScriptEngine extends ScriptableObject implements Runnable{
- private static final long serialVersionUID = 1L;
-
- /**
- * The context with which this script engine will be run
- */
- private Context jsContext = null;
-
- /**
- * Set of parameters passes to the script engine
- */
- private String[] params = null;
-
- /**
- * instance of Tuscany runtime
- */
- private SCAClientFactoryImpl tuscany;
-
- /**
- * A reference to the old class loader
- */
- private ClassLoader oldClassLoader = null;
-
- /**
- * Flag to indicate, if the shoutdown has requested by the user
- */
- private boolean shutdown;
-
- /**
- * The current output stream
- */
- private static PrintStream out = System.out;
-
- /**
- * The current error output stream
- */
- private PrintStream err = System.err;
-
- /**
- * The current input stream
- */
- private InputStream in = System.in;
-
- /**
- * The prompt used
- */
- private String prompt = "js> ";
-
- /**
- * The last exception that occured, used for debugging
- */
- private Throwable lastException = null;
-
- /**
- * Names of the global functions particular to the shell. Note that these functions
- * are not part of ECMA.
- */
- public static final String[] SCRIPT_FUNCTIONS = {
- "echo",
- "version",
- "load",
- "help",
- "exit",
- "printStackTrace",
- "loadModule",
- "listComponents",
- "getComponent",
- "listServices",
- "getService", };
-
- /**
- * get the class name
- * @return "global"
- */
- @Override
- public String getClassName() {
- return "global";
- }
-
- /**
- * Construct a script engine
- *
- * @param command line arguments
- */
- public ScriptEngine(String[] params) {
- this.params = params;
- }
-
- /**
- * Run the script engine. Invoking this method will initialize the script engine,
- * Tuscany Runtime and load any SCA modules if found in the classpath.
- *
- */
- public void run() {
- // Associate a new Context with this thread
- jsContext = Context.enter();
- try {
- // initialize standard objects
- jsContext.initStandardObjects(this);
- // define supported script functions
- this.defineFunctionProperties(SCRIPT_FUNCTIONS,
- ScriptEngine.class,
- ScriptableObject.DONTENUM);
-
- // init the tuscany runtime
- this.initTuscanyRuntime();
- // initialize the script engine
- this.startScriptEngine();
- }
- finally {
- tuscany.stop();
- Thread.currentThread().setContextClassLoader(oldClassLoader);
- Context.exit();
- }
- }
-
- /**
- * Print the help message.
- *
- * This method is defined as a script function.
- */
- public void help() {
- final String helpMsg =
- "Command Description \n" +
- "======= =========== \n" +
- "help() Display this message. \n" +
- "load(['f1.js', ...]) Load and execute javaScript source files named f1.js, etc. \n" +
- "echo([expr ...]) Evaluate and print a variable or an expressions. \n" +
- "exit() Exit this shell. \n" +
- "version([number]) Get or set the javaScript version. \n" +
- "printStackTrace() Print the stacktrace of the last exception \n" +
- "loadModule(jar|war) Not yet implemented. \n" +
- "listComponents() Not yet implemented. \n" +
- "getComponent('name') Get an instance of the component with the given name. \n" +
- "listServices() Not yet implemented. \n" +
- "getService('name') Not yet implemented. \n";
-
- out.println();
- out.println(helpMsg);
- }
-
- /**
- * Load a given module with the tuscany runtime
- *
- * This method is defined as a script function.
- *
- * @param moduleName absolute path of the module
- */
- public void loadModule(final String moduleName) {
- try {
- File file = new File(moduleName);
- URL[] urls = new URL[] {file.toURL()};
- final ClassLoader newCL = new URLClassLoader(urls);
- Thread.currentThread().setContextClassLoader(newCL);
- } catch (Exception e) {
- err.println(e.getMessage());
- lastException = e;
- }
- // TODO complete this method
- /*
- ModuleContext context = CurrentModuleContext.getContext();
- out.println(context.toString());
- tuscany.stop();
-
- try {
- File file = new File(moduleName);
- URL[] urls = new URL[] {file.toURL(), };
- final ClassLoader newCL = new URLClassLoader(urls);
- Thread.currentThread().setContextClassLoader(newCL);
-
- //Class c = Class.forName("customerinfo.CustomerInfoClient", true, newCL);
- //out.println("c = " + c);
-
- tuscany = new TuscanyRuntime(moduleName, null);
- tuscany.start();
-
- context = CurrentModuleContext.getContext();
- out.println(context.toString());
-
- //Object component = context.locateService("CustomerInfoServiceComponent");
- //out.println(component);
- }
- catch (Exception e) {
- err.println(e.getMessage());
- lastException = e;
- }
- */
- }
-
- /**
- * List the components available within the current module
- *
- * This method is defined as a script function.
- */
- public void listComponents() {
- // TODO complete this method
- }
-
- /**
- * Get the component available within the current module with a
- * given name
- *
- * This method is defined as a script function.
- *
- * @param name name of the component
- * @return service component object represented by the given name
- */
- public Object getComponent(String name) {
-// ModuleContext tuscanyContext = CurrentModuleContext.getContext();
-// Object component = tuscanyContext.locateService(name);
-
-// return component;
- return null;
- }
-
- /**
- * List the external services available within the current module
- *
- * This method is defined as a script function.
- */
- public void listServices() {
- EndpointRegistry epr = tuscany.getEndpointRegistry();
- for (Endpoint e : epr.getEndpoints()) {
- out.println(e.getURI());
- }
- }
-
- public Object getService(String serviceName) {
- ExtensionPointRegistry extensionsRegistry = tuscany.getExtensionsRegistry();
- FactoryExtensionPoint factories = extensionsRegistry.getExtensionPoint(FactoryExtensionPoint.class);
- AssemblyFactory assemblyFactory = factories.getFactory(AssemblyFactory.class);
-
- EndpointReference endpointReference = assemblyFactory.createEndpointReference();
- endpointReference.setReference(assemblyFactory.createComponentReference());
- Endpoint targetEndpoint = assemblyFactory.createEndpoint();
- targetEndpoint.setURI(serviceName);
- endpointReference.setTargetEndpoint(targetEndpoint);
- EndpointRegistry epr = tuscany.getEndpointRegistry();
- List<Endpoint> er = epr.findEndpoint(endpointReference);
- if (er.size() < 1) {
- err.println("service not found " + serviceName);
- return null;
- }
- JavaInterface ifac = (JavaInterface)er.get(0).getComponentServiceInterfaceContract().getInterface();
- return getService(serviceName, ifac.getName());
- }
-
- /**
- * Get an external service defined within the current module with a given name
- *
- * This method is defined as a script function.
- *
- * @param name name of the service
- * @return service object represented by the given name
- */
- protected Object getService(String serviceName, String type) {
- try {
- ClassLoader cl = Thread.currentThread().getContextClassLoader();
- Class<?> serviceInterface = cl.loadClass(type);
- Object service = tuscany.getService(serviceInterface, serviceName);
- printService(serviceInterface);
- return service;
- } catch (Exception e) {
- err.println(e.getClass().getSimpleName() + ": " + e.getMessage());
- lastException = e;
- return null;
- }
- }
-
- private void printService(Class<?> serviceInterface) {
- out.println(serviceInterface.getName());
- for (Method m : serviceInterface.getMethods()) {
- out.print(" " + m.getReturnType().getName() + " " + m.getName() + "(");
- boolean one = false;
- for (Class arg : m.getParameterTypes()) {
- if (one) {
- out.print(", ");
- }
- out.print(arg.getName());
- one = true;
- }
- out.println(")");
- }
- }
-
- /**
- * Echo a variable or a message.
- *
- * This method is defined as a script function.
- *
- * @param jsContext
- * @param thisObj
- * @param args
- * @param function
- */
- public static void echo(Context jsContext, Scriptable thisObj, Object[] args, Function function)
- {
- if (args.length > 0) {
- out.println(args[0]);
- for (int i=1; i < args.length; i++) {
- out.print(" " + Context.toString(args[i]));
- }
- }
- out.println();
- }
-
- /**
- * print the stacktrace of the last exception
- *
- * This method is defined as a script function.
- */
- public void printStackTrace() {
- if (lastException == null) {
- out.println("No stacktrace available");
- }
- else {
- err.println(getStackTrace(lastException));
- }
- }
-
- /**
- * Exit the shell when it is in the interactive mode.
- *
- * This method is defined as a script function.
- */
- public void exit(){
- shutdown = true;
- }
-
- /**
- * Get and set the language version.
- *
- * This method is defined as a JavaScript function.
- *
- * @param jsContext
- * @param thisObj
- * @param args
- * @param function
- */
- public static double version(Context jsContext, Scriptable thisObj, Object[] args, Function function)
- {
- if (args.length > 0) {
- int i = (int)Context.toNumber(args[0]);
- jsContext.setLanguageVersion(i);
- }
- return (double) jsContext.getLanguageVersion();
- }
-
- /**
- * Load and execute a set of JavaScript source files.
- *
- * This method is defined as a JavaScript function.
- *
- * @param jsContext
- * @param thisObj
- * @param args
- * @param function
- */
- public static void load(Context jsContext, Scriptable thisObj, Object[] args, Function function)
- {
- ScriptEngine engine = (ScriptEngine)getTopLevelScope(thisObj);
- for (int i = 0; i < args.length; i++) {
- engine.processFile(Context.toString(args[i]));
- }
- }
-
- /**
- * Get the current output stream
- *
- * @return current output stream
- */
- public PrintStream getOut() {
- return out;
- }
-
- /**
- * Set the current output stream
- * @param out the new output stream
- */
- public void setOut(PrintStream out) {
- ScriptEngine.out = out;
- }
-
- /**
- * Get the current error output stream
- *
- * @return Returns the current error output stream.
- */
- public PrintStream getErr() {
- return err;
- }
-
- /**
- * Set the current error output stream
- * @param err The new error output stream to set.
- */
- public void setErr(PrintStream err) {
- this.err = err;
- }
-
- /**
- * Get the current input stream
- *
- * @return Returns the current input stream.
- */
- public InputStream getIn() {
- return in;
- }
-
- /**
- * Set the current input stream
- * @param in The new input stream to set.
- */
- public void setIn(InputStream in) {
- this.in = in;
- }
-
- /**
- * initialize the Tuscany runtime
- *
- */
- protected void initTuscanyRuntime() {
-
- // Required to allow the SDO runtime to use the correct classloader
- oldClassLoader = Thread.currentThread().getContextClassLoader();
-// Thread.currentThread().setContextClassLoader(getClass().getClassLoader());
-
- tuscany = new SCAClientFactoryImpl(URI.create("tribes:foo"));
-
-// // Obtain and start the Tuscany runtime
-// try {
-// tuscany = new TuscanyRuntime("TuscanyClient", null);
-// tuscany.start();
-//
-// // this will get the module name; either specified by user or from the classpath
-// String moduleName = getCurrentModuleName();
-// // TODO how do we get all the components, services exposed by this module ?
-//
-// }
-// catch (ConfigurationException ce) {
-// err.println("Failed to start Tuscany runtime: " + ce.getMessage());
-// //ce.printStackTrace(err);
-// lastException = ce;
-// }
- }
-
-
- /**
- * start the script engine
- *
- */
- protected void startScriptEngine() {
-
- out.println("Tuscany SCA Shell 0.1, type help() for a list of supported functions.");
-
- // set up "arguments" in the global scope
- if (params.length > 1) {
- int length = params.length - 1;
- Object obj[] = new Object[length];
- System.arraycopy(params, 1, obj, 0, length);
-
- Scriptable argsObj = jsContext.newArray(this, obj);
- this.defineProperty("arguments", argsObj, ScriptableObject.DONTENUM);
- }
-
- if (params.length == 0) {
- // no file name specified, go to interactive mode
- this.startInteractiveMode();
- }
- else {
- // TODO this could be a jar file or a script file
- // process the specified file
- this.processFile(params[0]);
- }
- System.gc();
- }
-
-
-
- /**
- * Evaluate JavaScript source in the interactive mode.
- *
- */
- private void startInteractiveMode()
- {
- // see if org.mozilla.javascript.tools.shell.Main.processSource() can handle this
- //Main.setErr(this.getErr());
- //Main.setOut(this.getOut());
- //Main.setIn(this.getIn());
- //Main.processSource(jsContext, filename);
-
- BufferedReader reader = new BufferedReader(new InputStreamReader(in));
- int currentLine = 1;
- boolean done = false;
- while (!shutdown && !done) {
- out.print(prompt);
- out.flush();
- int lineToCompile = currentLine;
- try {
- StringBuffer source = new StringBuffer();
- // read the next line entered by user
- boolean compilable = false;
- while(!compilable) {
- String nextLine = reader.readLine();
- if (nextLine != null) {
- currentLine += 1;
- source.append(nextLine).append("\n");
- compilable = jsContext.stringIsCompilableUnit(source.toString());
- }
- else {
- // TODO check if this can handle Ctrl+C
- System.out.println("=== Ctrl+C pressed ==");
- // break both the loops
- done = true;
- compilable = true;
- }
- }
- Object result = jsContext.evaluateString(this, source.toString(), "<stdin>", lineToCompile, null);
- if (result != Context.getUndefinedValue()) {
- out.println(Context.toString(result));
- }
- }
- catch (Exception e) {
- if (e instanceof WrappedException) {
- WrappedException we = (WrappedException)e;
- err.println(we.getWrappedException().getMessage());
- }
- err.println(e.getMessage());
- //e.printStackTrace(err);
- lastException = e;
- }
- }
- out.println();
- }
-
- /**
- * Read the contents from a script file and execute it.
- *
- * @param filename the name of the file to compile
- */
- private void processFile(String fileName) {
- BufferedReader reader = null;
- try {
- reader = new BufferedReader(new FileReader(fileName));
- jsContext.evaluateReader(this, reader, fileName, 1, null);
- }
- catch (Exception e) {
- if (e instanceof WrappedException) {
- WrappedException we = (WrappedException)e;
- err.println(we.getWrappedException().getMessage());
- }
- err.println(e.getLocalizedMessage());
- //e.printStackTrace(err);
- lastException = e;
- }
- finally {
- try {
- reader.close();
- }
- catch (IOException ioe) {
- err.println(ioe.getLocalizedMessage());
- //ioe.printStackTrace(err);
- lastException = ioe;
- }
- }
- }
-
- /**
- * Find the SCA module name. If the user have specified one, use that,
- * otherwise, if there is a module definition in the path, pick it up.
- *
- * @return name of the module
- */
- private String getCurrentModuleName() {
- String moduleName = "";
-
- // TODO parse the arguments to see if there is an SCA module name
- return moduleName;
- }
-
- /**
- * Get the stacktrace for a give exception
- *
- * @param t Throwable from which the stacktrace need to be obtained
- * @return char array containing the stack trace
- */
- private char[] getStackTrace(Throwable t) {
- CharArrayWriter charWriter = new CharArrayWriter(2048);
- PrintWriter writer = new PrintWriter(charWriter);
- t.printStackTrace(writer);
-
- return charWriter.toCharArray();
- }
-}
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