Example usage for javax.script ScriptEngineManager ScriptEngineManager

Introduction

In this page you can find the example usage for javax.script ScriptEngineManager ScriptEngineManager.

Prototype

public ScriptEngineManager() 

Source Link

Document

The effect of calling this constructor is the same as calling ScriptEngineManager(Thread.currentThread().getContextClassLoader()).

Usage

From source file:Main.java

public static void main(String[] args) throws ScriptException, NoSuchMethodException {
    ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
    engine.eval("function foo(predicate, obj) { return !!(eval(predicate)); };");

    Invocable invocable = (Invocable) engine;

    Person person = new Person();
    person.setName("Hans");

    String predicate = "obj.getLengthOfName() >= 4";
    Object result = invocable.invokeFunction("foo", predicate, person);
    System.out.println(result);//from   w  w  w.ja  v a  2 s . com
}

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From source file:Main.java

public static void main(String[] args) throws Exception {
    ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
    engine.eval(new FileReader("res/nashorn2.js"));
}

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From source file:com.ikanow.aleph2.analytics.spark.assets.SparkJsInterpreterTopology.java

public static void main(String[] args)
        throws InstantiationException, IllegalAccessException, ClassNotFoundException {

    final SetOnce<IBucketLogger> bucket_logger = new SetOnce<>();
    final SetOnce<String> job_name = new SetOnce<>(); // (the string we'll use in logging activities)
    try {/*w  w w .j  a  va2s. co  m*/
        final Tuple2<IAnalyticsContext, Optional<ProcessingTestSpecBean>> aleph2_tuple = SparkTechnologyUtils
                .initializeAleph2(args);
        final IAnalyticsContext context = aleph2_tuple._1();
        final Optional<ProcessingTestSpecBean> test_spec = aleph2_tuple._2();

        bucket_logger.set(context.getLogger(context.getBucket()));
        job_name.set(context.getJob().map(j -> j.name()).orElse("no_name"));

        // Optional: make really really sure it exists after the specified timeout
        SparkTechnologyUtils.registerTestTimeout(test_spec, () -> {
            System.exit(0);
        });

        final SparkTopologyConfigBean config = BeanTemplateUtils
                .from(context.getJob().map(job -> job.config()).orElse(Collections.emptyMap()),
                        SparkTopologyConfigBean.class)
                .get();

        final String js_script = Optional.ofNullable(config.script()).orElse("");

        //INFO:
        System.out.println("Starting " + job_name.get());

        SparkConf spark_context = new SparkConf().setAppName(job_name.get());

        test_spec.ifPresent(spec -> System.out
                .println("OPTIONS: test_spec = " + BeanTemplateUtils.toJson(spec).toString()));

        try (final JavaSparkContext jsc = new JavaSparkContext(spark_context)) {

            final Multimap<String, JavaPairRDD<Object, Tuple2<Long, IBatchRecord>>> inputs = SparkTechnologyUtils
                    .buildBatchSparkInputs(context, test_spec, jsc, Collections.emptySet());
            final JavaPairRDD<Object, Tuple2<Long, IBatchRecord>> all_inputs = inputs.values().stream()
                    .reduce((acc1, acc2) -> acc1.union(acc2)).orElse(null);

            // Load globals:
            ScriptEngineManager manager = new ScriptEngineManager();
            ScriptEngine engine = manager.getEngineByName("JavaScript");
            engine.put("_a2_global_context", context);
            engine.put("_a2_global_bucket", context.getBucket().get());
            engine.put("_a2_global_job", context.getJob().get());
            engine.put("_a2_global_config",
                    BeanTemplateUtils.configureMapper(Optional.empty()).convertValue(config, JsonNode.class));
            engine.put("_a2_global_mapper", BeanTemplateUtils.configureMapper(Optional.empty()));
            //TODO (until bucket logger is serializable, don't allow anywhere)
            //engine.put("_a2_bucket_logger", bucket_logger.optional().orElse(null));
            engine.put("_a2_enrichment_name", job_name.get());
            engine.put("_a2_spark_inputs", inputs);
            engine.put("_a2_spark_inputs_all", all_inputs);
            engine.put("_a2_spark_context", jsc);

            Stream.concat(config.uploaded_lang_files().stream(),
                    Stream.of("aleph2_sparkjs_globals_before.js", ""))
                    .flatMap(Lambdas.flatWrap_i(import_path -> {
                        try {
                            if (import_path.equals("")) { // also import the user script just before here
                                return js_script;
                            } else
                                return IOUtils.toString(SparkJsInterpreterTopology.class.getClassLoader()
                                        .getResourceAsStream(import_path), "UTF-8");
                        } catch (Throwable e) {
                            bucket_logger.optional()
                                    .ifPresent(l -> l.log(Level.ERROR,
                                            ErrorUtils.lazyBuildMessage(false,
                                                    () -> SparkJsInterpreterTopology.class.getSimpleName(),
                                                    () -> job_name.get() + ".main", () -> null,
                                                    () -> ErrorUtils.get(
                                                            "Error initializing stage {0} (script {1}): {2}",
                                                            job_name.get(), import_path, e.getMessage()),
                                                    () -> ImmutableMap.<String, Object>of("full_error",
                                                            ErrorUtils.getLongForm("{0}", e)))));

                            System.out.println(ErrorUtils.getLongForm("onStageInitialize: {0}", e));
                            throw e; // ignored
                        }
                    })).forEach(Lambdas.wrap_consumer_i(script -> {
                        try {
                            engine.eval(script);
                        } catch (Throwable e) {
                            bucket_logger.optional()
                                    .ifPresent(l -> l.log(Level.ERROR,
                                            ErrorUtils.lazyBuildMessage(false,
                                                    () -> SparkJsInterpreterTopology.class.getSimpleName(),
                                                    () -> job_name.get() + ".main", () -> null,
                                                    () -> ErrorUtils.get(
                                                            "Error initializing stage {0} (main script): {1}",
                                                            job_name.get(), e.getMessage()),
                                                    () -> ImmutableMap.<String, Object>of("full_error",
                                                            ErrorUtils.getLongForm("{0}", e)))));

                            System.out.println(ErrorUtils.getLongForm("onStageInitialize: {0}", e));
                            throw e; // ignored
                        }
                    }));
            ;

            jsc.stop();

            //INFO:
            System.out.println("Finished " + job_name.get());
        }
    } catch (Throwable t) {
        System.out.println(ErrorUtils.getLongForm("ERROR: {0}", t));

        bucket_logger.optional().ifPresent(l -> l.log(Level.ERROR, ErrorUtils.lazyBuildMessage(false,
                () -> SparkJsInterpreterTopology.class.getSimpleName()
                        + job_name.optional().map(j -> "." + j).orElse(""),
                () -> job_name.optional().orElse("global") + ".main", () -> null,
                () -> ErrorUtils.get("Error on batch in job {0}: {1}",
                        job_name.optional().orElse("global") + ".main", t.getMessage()),
                () -> ImmutableMap.<String, Object>of("full_error", ErrorUtils.getLongForm("{0}", t)))));
    }
}

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From source file:com.kactech.otj.examples.App_otj.java

@SuppressWarnings("unchecked")
public static void main(String[] args) throws Exception {
    String command = null;/*from  ww  w .j a  va2 s  .c  o m*/
    String hisacct = null;
    String hisacctName = null;
    String hisacctAsset = null;
    String asset = null;
    String assetName = null;
    List<String> argList = null;
    boolean newAccount = false;
    File dir = null;
    ConnectionInfo connection = null;
    List<ScriptFilter> filters = null;

    CommandLineParser parser = new GnuParser();
    CommandLine cmd = null;
    try {
        cmd = parser.parse(options, args);
    } catch (Exception e) {
        System.err.println("Command-line parsing error: " + e.getMessage());
        help();
        System.exit(-1);
    }
    if (cmd.hasOption('h')) {
        help();
        System.exit(0);
    }
    @SuppressWarnings("unchecked")
    List<String> list = cmd.getArgList();
    if (list.size() > 1) {
        System.err.println("only one command is supported, you've typed " + list);
        help();
        System.exit(-1);
    }
    if (list.size() > 0)
        command = list.get(0).trim();

    List<SampleAccount> accounts = ExamplesUtils.getSampleAccounts();

    if (cmd.hasOption('s')) {
        String v = cmd.getOptionValue('s').trim();
        connection = ExamplesUtils.findServer(v);
        if (connection == null) {
            System.err.println("unknown server: " + v);
            System.exit(-1);
        }
    } else {
        connection = ExamplesUtils.findServer(DEF_SERVER_NAME);
        if (connection == null) {
            System.err.println("default server not found server: " + DEF_SERVER_NAME);
            System.exit(-1);
        }
    }

    if (cmd.hasOption('t')) {
        String v = cmd.getOptionValue('t');
        for (SampleAccount ac : accounts)
            if (ac.accountName.startsWith(v)) {
                hisacct = ac.accountID;
                hisacctName = ac.accountName;
                hisacctAsset = ac.assetID;
                break;
            }
        if (hisacct == null)
            if (mayBeValid(v))
                hisacct = v;
            else {
                System.err.println("invalid hisacct: " + v);
                System.exit(-1);
            }
    }
    if (cmd.hasOption('p')) {
        String v = cmd.getOptionValue('p');
        for (SampleAccount ac : accounts)
            if (ac.assetName.startsWith(v)) {
                asset = ac.assetID;
                assetName = ac.assetName;
                break;
            }
        if (asset == null)
            if (mayBeValid(v))
                asset = v;
            else {
                System.err.println("invalid asset: " + v);
                System.exit(-1);
            }
    }

    if (cmd.hasOption('a')) {
        String v = cmd.getOptionValue('a');
        argList = new ArrayList<String>();
        boolean q = false;
        StringBuilder b = new StringBuilder();
        for (int i = 0; i < v.length(); i++) {
            char c = v.charAt(i);
            if (c == '"') {
                if (q) {
                    argList.add(b.toString());
                    b = null;
                    q = false;
                    continue;
                }
                if (b != null)
                    argList.add(b.toString());
                b = new StringBuilder();
                q = true;
                continue;
            }
            if (c == ' ' || c == '\t') {
                if (q) {
                    b.append(c);
                    continue;
                }
                if (b != null)
                    argList.add(b.toString());
                b = null;
                continue;
            }
            if (b == null)
                b = new StringBuilder();
            b.append(c);
        }
        if (b != null)
            argList.add(b.toString());
        if (q) {
            System.err.println("unclosed quote in args: " + v);
            System.exit(-1);
        }
    }

    dir = new File(cmd.hasOption('d') ? cmd.getOptionValue('d') : DEF_CLIENT_DIR);

    if (cmd.hasOption('x'))
        del(dir);

    newAccount = cmd.hasOption('n');

    if (cmd.hasOption('f')) {
        filters = new ArrayList<ScriptFilter>();
        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = manager.getEngineByName("JavaScript");
        Compilable compilingEngine = (Compilable) engine;
        for (String fn : cmd.getOptionValue('f').split(",")) {
            fn = fn.trim();
            if (fn.isEmpty())
                continue;
            fn += ".js";
            Reader r = null;
            try {
                r = new InputStreamReader(new FileInputStream(new File("filters", fn)), Utils.UTF8);
            } catch (Exception e) {
                try {
                    r = new InputStreamReader(
                            App_otj.class.getResourceAsStream("/com/kactech/otj/examples/filters/" + fn));
                } catch (Exception e2) {
                }
            }
            if (r == null) {
                System.err.println("filter not found: " + fn);
                System.exit(-1);
            } else
                try {
                    CompiledScript compiled = compilingEngine.compile(r);
                    ScriptFilter sf = new ScriptFilter(compiled);
                    filters.add(sf);
                } catch (Exception ex) {
                    System.err.println("error while loading " + fn + ": " + ex);
                    System.exit(-1);
                }
        }
    }

    System.out.println("server: " + connection.getEndpoint() + " " + connection.getID());
    System.out.println("command: '" + command + "'");
    System.out.println("args: " + argList);
    System.out.println("hisacct: " + hisacct);
    System.out.println("hisacctName: " + hisacctName);
    System.out.println("hisacctAsset: " + hisacctAsset);
    System.out.println("asset: " + asset);
    System.out.println("assetName: " + assetName);

    if (asset != null && hisacctAsset != null && !asset.equals(hisacctAsset)) {
        System.err.println("asset differs from hisacctAsset");
        System.exit(-1);
    }

    EClient client = new EClient(dir, connection);
    client.setAssetType(asset != null ? asset : hisacctAsset);
    client.setCreateNewAccount(newAccount);
    if (filters != null)
        client.setFilters(filters);

    try {
        Utils.init();
        Client.DEBUG_JSON = true;
        client.init();

        if ("balance".equals(command))
            System.out.println("Balance: " + client.getAccount().getBalance().getAmount());
        else if ("acceptall".equals(command))
            client.processInbox();
        else if ("transfer".equals(command)) {
            if (hisacct == null)
                System.err.println("please specify --hisacct");
            else {
                int idx = argList != null ? argList.indexOf("amount") : -1;
                if (idx < 0)
                    System.err.println("please specify amount");
                else if (idx == argList.size())
                    System.err.println("amount argument needs value");
                else {
                    Long amount = -1l;
                    try {
                        amount = new Long(argList.get(idx + 1));
                    } catch (Exception e) {

                    }
                    if (amount <= 0)
                        System.err.println("invalid amount");
                    else {
                        client.notarizeTransaction(hisacct, amount);
                    }
                }
            }
        } else if ("reload".equals(command))
            client.reloadState();
        else if ("procnym".equals(command))
            client.processNymbox();
    } finally {
        client.saveState();
        client.close();
    }
}

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From source file:Main.java

public static Object getValue(String filepath, String key) {
    try {//  w  w  w.j  a  v  a 2  s .com
        ScriptEngineManager sem = new ScriptEngineManager();
        ScriptEngine jsEngine = sem.getEngineByName("js");
        jsEngine.eval(new FileReader(filepath));
        return jsEngine.get(key);
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return null;
}

---

From source file:Main.java

public static String evalScript(String engineName, String script) throws Exception {
    //System.out.println("evaluating "+script);
    ScriptEngineManager mgr = new ScriptEngineManager();
    ScriptEngine engine = mgr.getEngineByName("JavaScript");
    String result = "" + engine.eval(script);
    return result;
}

---

From source file:Main.java

public static Object invokeFunction(String filepath, String funcname, Object... params) {
    try {//from ww  w  .  j  a v a 2s  .  co m
        ScriptEngineManager sem = new ScriptEngineManager();
        ScriptEngine jsEngine = sem.getEngineByName("js");
        jsEngine.eval(new FileReader(filepath));
        Invocable invocable = (Invocable) jsEngine;
        return invocable.invokeFunction(funcname, params);
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return null;
}

---

From source file:JavaScriptUtils.java

public static void eval(JavaScript script) throws ScriptException {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("js");
    engine.eval(script.value());/*from   w  w w  .j av  a 2 s .c  o  m*/
}

---

From source file:com.espertech.esper.epl.script.jsr223.JSR223Helper.java

public static CompiledScript verifyCompileScript(ExpressionScriptProvided script, String dialect)
        throws ExprValidationException {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName(dialect);
    if (engine == null) {
        throw new ExprValidationException("Failed to obtain script engine for dialect '" + dialect
                + "' for script '" + script.getName() + "'");
    }/*from  w ww . j  a v a  2  s  . co  m*/
    engine.put(ScriptEngine.FILENAME, script.getName());

    Compilable compilingEngine = (Compilable) engine;
    try {
        return compilingEngine.compile(script.getExpression());
    } catch (ScriptException ex) {
        String message = "Exception compiling script '" + script.getName() + "' of dialect '" + dialect + "': "
                + getScriptCompileMsg(ex);
        log.info(message, ex);
        throw new ExprValidationException(message, ex);
    }
}

---

From source file:fr.assoba.open.sel.generator.LanguageExecutor.java

public static void execute(List<Namespace> namespaceList, IO io, String... languages)
        throws IOException, ScriptException {
    ScriptEngineManager factory = new ScriptEngineManager();
    ScriptEngine jsEngine = factory.getEngineByName("JavaScript");
    jsEngine.put("IO", io);
    jsEngine.eval(io.readFile("underscore.js"));
    jsEngine.eval(io.readFile("handlebars-v1.3.0.js"));
    ObjectMapper mapper = new ObjectMapper();
    jsEngine.eval("namespaces=" + mapper.writeValueAsString(namespaceList));
    for (String lang : languages) {
        if (generatorMap.containsKey(lang)) {
            generatorMap.get(lang).generate(namespaceList, io);
        } else {/*from www.  j a v  a  2 s  .co  m*/
            jsEngine.eval(io.readFile(lang + ".js"));
        }
    }
}

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