List of usage examples for javax.script ScriptEngineManager getEngineByExtension
public ScriptEngine getEngineByExtension(String extension)
ScriptEngine for a given extension. From source file:org.jwebsocket.plugins.scripting.ScriptingPlugIn.java
private void execAppBeforeLoadChecks(final String aAppName, String aAppPath) throws Exception { // parsing app manifest File lManifestFile = new File(aAppPath + "/manifest.json"); if (!lManifestFile.exists() || !lManifestFile.canRead()) { String lMsg = "Unable to load '" + aAppName + "' application. Manifest file no found!"; mLog.error(lMsg);//from w ww .j av a 2 s . c om throw new FileNotFoundException(lMsg); } // parsing app manifest file ObjectMapper lMapper = new ObjectMapper(); Map<String, Object> lTree = lMapper.readValue(lManifestFile, Map.class); Token lManifestJSON = TokenFactory.createToken(); lManifestJSON.setMap(lTree); // getting script language extension String lExt = lManifestJSON.getString(Manifest.LANGUAGE_EXT, "js"); // checking jWebSocket version Manifest.checkJwsVersion(lManifestJSON.getString(Manifest.JWEBSOCKET_VERSION, "1.0.0")); // checking jWebSocket plug-ins dependencies Manifest.checkJwsDependencies( lManifestJSON.getList(Manifest.JWEBSOCKET_PLUGINS_DEPENDENCIES, new ArrayList<String>())); // checking sandbox permissions dependency Manifest.checkPermissions(lManifestJSON.getList(Manifest.PERMISSIONS, new ArrayList()), mSettings.getAppPermissions(aAppName, aAppPath), aAppPath); // validating bootstrap file final File lBootstrap = new File(aAppPath + "/App." + lExt); if (!lBootstrap.exists() || !lBootstrap.canRead()) { String lMsg = "Unable to load '" + aAppName + "' application. Bootstrap file not found!"; mLog.error(lMsg); throw new FileNotFoundException(lMsg); } LocalLoader lClassLoader = new LocalLoader((URLClassLoader) ClassLoader.getSystemClassLoader()); ScriptEngineManager lManager = new ScriptEngineManager(lClassLoader); final ScriptEngine lScriptApp; final BaseScriptApp lApp; if ("js".equals(lExt)) { // making "nashorn" the default engine for JavaScript if (null != lManager.getEngineByName("nashorn")) { lScriptApp = lManager.getEngineByName("nashorn"); } else { lScriptApp = lManager.getEngineByExtension(lExt); } } else { lScriptApp = lManager.getEngineByExtension(lExt); } // creating the high level script app instance if ("js".equals(lExt)) { lApp = new JavaScriptApp(this, aAppName, aAppPath, lScriptApp, lClassLoader); } else { String lMsg = "The extension '" + lExt + "' is not currently supported!"; mLog.error(lMsg); throw new Exception(lMsg); } // loading application into security sandbox Tools.doPrivileged(mSettings.getAppPermissions(aAppName, aAppPath), new PrivilegedAction<Object>() { @Override public Object run() { try { // evaluating app content lScriptApp.eval(FileUtils.readFileToString(lBootstrap)); return null; } catch (Exception lEx) { String lAction = (mApps.containsKey(aAppName)) ? "reloaded" : "loaded"; String lMsg = "Script applicaton '" + aAppName + "' not " + lAction + " because it failed the 'before-load' checks: " + lEx.getMessage(); mLog.info(lMsg); throw new RuntimeException(lMsg); } } }); if (mLog.isDebugEnabled()) { mLog.debug(aAppName + "(" + lExt + ") application passed the 'before-load' checks successfully!"); } }
From source file:org.jwebsocket.plugins.scripting.ScriptingPlugIn.java
/** * Loads an script application./*from w w w. j a va2 s .c o m*/ * * @param aAppName The application name * @param aAppPath The application home path * @param aHotLoad * @return * @throws Exception */ private void loadApp(final String aAppName, String aAppPath, boolean aHotLoad) throws Exception { // notifying before app reload event here BaseScriptApp lScript = mApps.get(aAppName); if (null != lScript) { lScript.notifyEvent(BaseScriptApp.EVENT_BEFORE_APP_RELOAD, new Object[] { aHotLoad }); if (!aHotLoad) { destroyAppBeans(lScript); } } // parsing app manifest File lManifestFile = new File(aAppPath + "/manifest.json"); // parsing app manifest file ObjectMapper lMapper = new ObjectMapper(); Map<String, Object> lTree = lMapper.readValue(lManifestFile, Map.class); Token lManifestJSON = TokenFactory.createToken(); lManifestJSON.setMap(lTree); // getting script language extension String lExt = lManifestJSON.getString(Manifest.LANGUAGE_EXT, "js"); // validating bootstrap file final File lBootstrap = new File(aAppPath + "/App." + lExt); // support hot app load if (aHotLoad && mApps.containsKey(aAppName)) { try { // loading app mApps.get(aAppName).eval(lBootstrap.getPath()); } catch (ScriptException lEx) { mLog.error("Script applicaton '" + aAppName + "' failed to start: " + lEx.getMessage()); mApps.remove(aAppName); throw new ScriptException(lEx.getMessage()); } } else { LocalLoader lClassLoader = new LocalLoader((URLClassLoader) ClassLoader.getSystemClassLoader()); ScriptEngineManager lManager = new ScriptEngineManager(lClassLoader); final ScriptEngine lScriptApp; if ("js".equals(lExt)) { // making "nashorn" the default engine for JavaScript if (null != lManager.getEngineByName("nashorn")) { lScriptApp = lManager.getEngineByName("nashorn"); } else { lScriptApp = lManager.getEngineByExtension(lExt); } } else { lScriptApp = lManager.getEngineByExtension(lExt); } // crating the high level script app instance if ("js".equals(lExt)) { mApps.put(aAppName, new JavaScriptApp(this, aAppName, aAppPath, lScriptApp, lClassLoader)); } else { String lMsg = "The extension '" + lExt + "' is not currently supported!"; mLog.error(lMsg); throw new Exception(lMsg); } final BaseScriptApp lApp = mApps.get(aAppName); // loading application into security sandbox Tools.doPrivileged(mSettings.getAppPermissions(aAppName, aAppPath), new PrivilegedAction<Object>() { @Override public Object run() { try { // loading app lApp.eval(lBootstrap.getPath()); return null; } catch (Exception lEx) { mLog.error("Script applicaton '" + aAppName + "' failed to start: " + lEx.getMessage()); mApps.remove(aAppName); throw new RuntimeException(lEx); } } }); } // notifying app loaded event mApps.get(aAppName).notifyEvent(BaseScriptApp.EVENT_APP_LOADED, new Object[] { aHotLoad }); if (mLog.isDebugEnabled()) { mLog.debug(aAppName + "(" + lExt + ") application loaded successfully!"); } }
From source file:org.openhab.core.jsr223.internal.engine.scriptmanager.Script.java
public void loadScript(File file) throws FileNotFoundException, ScriptException, NoSuchMethodException { logger.info("Loading Script " + file.getName()); String extension = getFileExtension(file); ScriptEngineManager factory = new ScriptEngineManager(); engine = factory.getEngineByExtension(extension); if (engine != null) { logger.info("EngineName: " + engine.getFactory().getEngineName()); initializeSciptGlobals();//from w ww . j a v a 2s . c o m engine.eval(new FileReader(file)); Invocable inv = (Invocable) engine; RuleSet ruleSet = (RuleSet) inv.invokeFunction("getRules"); rules.addAll(ruleSet.getRules()); } }
From source file:org.opennms.opennms.pris.plugins.script.util.ScriptManager.java
public static Object execute(final InstanceConfiguration config, final Map<String, Object> bindings) throws IOException, ScriptException { Requisition requisition = null;/*w w w .j av a2s . com*/ // Get the path to the script final List<Path> scripts = config.getPaths("file"); // Get the script engine by language defined in config or by extension if it // is not defined in the config final ScriptEngineManager SCRIPT_ENGINE_MANAGER = new ScriptEngineManager( ScriptManager.class.getClassLoader()); for (Path script : scripts) { final ScriptEngine scriptEngine = config.containsKey("lang") ? SCRIPT_ENGINE_MANAGER.getEngineByName(config.getString("lang")) : SCRIPT_ENGINE_MANAGER.getEngineByExtension(FilenameUtils.getExtension(script.toString())); if (scriptEngine == null) { throw new RuntimeException("Script engine implementation not found"); } // Create some bindings for values available in the script final Bindings scriptBindings = scriptEngine.createBindings(); scriptBindings.put("script", script); scriptBindings.put("logger", LoggerFactory.getLogger(script.toString())); scriptBindings.put("config", config); scriptBindings.put("instance", config.getInstanceIdentifier()); scriptBindings.put("interfaceUtils", new InterfaceUtils(config)); scriptBindings.putAll(bindings); // Overwrite initial requisition with the requisition from the previous script, if there was any. if (requisition != null) { scriptBindings.put("requisition", requisition); } // Evaluate the script and return the requisition created in the script try (final Reader scriptReader = Files.newBufferedReader(script, StandardCharsets.UTF_8)) { LOGGER.debug("Start Script {}", script); requisition = (Requisition) scriptEngine.eval(scriptReader, scriptBindings); LOGGER.debug("Done Script {}", script); } } return requisition; }
From source file:org.springframework.data.hadoop.scripting.Jsr223ScriptEvaluator.java
protected ScriptEngine discoverEngine(ScriptSource script, Map<String, Object> arguments) { ScriptEngineManager engineManager = new ScriptEngineManager(classLoader); ScriptEngine engine = null;//w ww. j a va 2 s . c om if (StringUtils.hasText(language)) { engine = engineManager.getEngineByName(language); } else { // make use the extension (enhanced ScriptSource interface) Assert.hasText(extension, "no language or extension specified"); engine = engineManager.getEngineByExtension(extension); } Assert.notNull(engine, "No suitable engine found for " + (StringUtils.hasText(language) ? "language " + language : "extension " + extension)); if (log.isDebugEnabled()) { ScriptEngineFactory factory = engine.getFactory(); log.debug(String.format("Using ScriptEngine %s (%s), language %s (%s)", factory.getEngineName(), factory.getEngineVersion(), factory.getLanguageName(), factory.getLanguageVersion())); } return engine; }