diff options
Diffstat (limited to 'branches/java-post-M1/sca/containers/container.rhino/src/main/java/org/apache/tuscany/container/rhino/shell/ScriptEngine.java')
| -rw-r--r-- | branches/java-post-M1/sca/containers/container.rhino/src/main/java/org/apache/tuscany/container/rhino/shell/ScriptEngine.java | 573 |
1 files changed, 0 insertions, 573 deletions
diff --git a/branches/java-post-M1/sca/containers/container.rhino/src/main/java/org/apache/tuscany/container/rhino/shell/ScriptEngine.java b/branches/java-post-M1/sca/containers/container.rhino/src/main/java/org/apache/tuscany/container/rhino/shell/ScriptEngine.java deleted file mode 100644 index e8e6605300..0000000000 --- a/branches/java-post-M1/sca/containers/container.rhino/src/main/java/org/apache/tuscany/container/rhino/shell/ScriptEngine.java +++ /dev/null @@ -1,573 +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.container.rhino.shell;
-
-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.net.URL;
-import java.net.URLClassLoader;
-
-import org.apache.tuscany.core.client.TuscanyRuntime;
-import org.mozilla.javascript.Context;
-import org.mozilla.javascript.Function;
-import org.mozilla.javascript.Scriptable;
-import org.mozilla.javascript.ScriptableObject;
-import org.mozilla.javascript.WrappedException;
-import org.osoa.sca.CurrentModuleContext;
-import org.osoa.sca.ModuleContext;
-
-/**
- *
- * This class implements a Scripting Engine for the Tuscany runitme. This engine uses the Rhino javaScript Engine.
- *
- * <p>
- * The defulat script functions supported by this engine are the follwing:
- * <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>
- *
- * This class was based on ideas in the Rhino shell sample at http://lxr.mozilla.org/mozilla/source/js/rhino/examples/Shell.java
- */
-public class ScriptEngine extends ScriptableObject implements Runnable {
-
- /**
- * 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 TuscanyRuntime 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.startScriptEngin();
- } finally {
- if (tuscany != null) {
- 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) {
- // TODO complete this method
- if (tuscany != null) {
- tuscany.stop();
- }
-
- try {
- File file = new File(moduleName);
- URL[] urls = new URL[] { file.toURL(), };
- final ClassLoader newCL = new URLClassLoader(urls);
- Thread.currentThread().setContextClassLoader(newCL);
-
- tuscany = new TuscanyRuntime(moduleName, null);
- tuscany.start();
-
- } catch (Exception e) {
- e.printStackTrace();
- 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;
- }
-
- /**
- * List the external services available within the current module
- *
- * This method is defined as a script function.
- */
- public void listServices() {
- // TODO complete this method
- }
-
- /**
- * 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
- */
- public Object getService(String name) {
- // get a service proxy
- ModuleContext tuscanyContext = CurrentModuleContext.getContext();
- Object service = tuscanyContext.locateService(name);
- out.println("service obj = " + service);
-
- return service;
- }
-
- /**
- * 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());
-
- // 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 (Exception ce) {
- ce.printStackTrace();
- err.println("Failed to start Tuscany runtime: " + ce.getMessage());
- // ce.printStackTrace(err);
- lastException = ce;
- }
- }
-
- /**
- * start the script engine
- *
- */
- protected void startScriptEngin() {
-
- 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();
- }
-
- public static void main(String args[]) {
- new ScriptEngine(args).run();
- }
-}
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