下面列出了javax.script.Invocable#invokeMethod ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
public static void main(final String[] args) throws Exception {
final ScriptEngineManager manager = new ScriptEngineManager();
final ScriptEngine engine = manager.getEngineByName("nashorn");
// JavaScript code in a String. This code defines a script object 'obj'
// with one method called 'hello'.
final String script = "var obj = new Object(); obj.hello = function(name) { print('Hello, ' + name); }";
// evaluate script
engine.eval(script);
// javax.script.Invocable is an optional interface.
// Check whether your script engine implements or not!
// Note that the JavaScript engine implements Invocable interface.
final Invocable inv = (Invocable) engine;
// get script object on which we want to call the method
final Object obj = engine.get("obj");
// invoke the method named "hello" on the script object "obj"
inv.invokeMethod(obj, "hello", "Script Method !!" );
}
public static void main(final String[] args) throws Exception {
final ScriptEngineManager manager = new ScriptEngineManager();
final ScriptEngine engine = manager.getEngineByName("nashorn");
// JavaScript code in a String. This code defines a script object 'obj'
// with one method called 'hello'.
final String script = "var obj = new Object(); obj.hello = function(name) { print('Hello, ' + name); }";
// evaluate script
engine.eval(script);
// javax.script.Invocable is an optional interface.
// Check whether your script engine implements or not!
// Note that the JavaScript engine implements Invocable interface.
final Invocable inv = (Invocable) engine;
// get script object on which we want to call the method
final Object obj = engine.get("obj");
// invoke the method named "hello" on the script object "obj"
inv.invokeMethod(obj, "hello", "Script Method !!" );
}
public static void main(final String[] args) throws Exception {
final ScriptEngineManager manager = new ScriptEngineManager();
final ScriptEngine engine = manager.getEngineByName("nashorn");
// JavaScript code in a String. This code defines a script object 'obj'
// with one method called 'hello'.
final String script = "var obj = new Object(); obj.hello = function(name) { print('Hello, ' + name); }";
// evaluate script
engine.eval(script);
// javax.script.Invocable is an optional interface.
// Check whether your script engine implements or not!
// Note that the JavaScript engine implements Invocable interface.
final Invocable inv = (Invocable) engine;
// get script object on which we want to call the method
final Object obj = engine.get("obj");
// invoke the method named "hello" on the script object "obj"
inv.invokeMethod(obj, "hello", "Script Method !!" );
}
@Override
protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request,
HttpServletResponse response) throws Exception {
try {
ScriptEngine engine = getEngine();
Invocable invocable = (Invocable) engine;
String url = getUrl();
String template = getTemplate(url);
Object html;
if (this.renderObject != null) {
Object thiz = engine.eval(this.renderObject);
html = invocable.invokeMethod(thiz, this.renderFunction, template, model, url);
}
else {
html = invocable.invokeFunction(this.renderFunction, template, model, url);
}
response.getWriter().write(String.valueOf(html));
}
catch (ScriptException ex) {
throw new ServletException("Failed to render script template", new StandardScriptEvalException(ex));
}
}
public static void main(final String[] args) throws Exception {
final ScriptEngineManager manager = new ScriptEngineManager();
final ScriptEngine engine = manager.getEngineByName("nashorn");
// JavaScript code in a String. This code defines a script object 'obj'
// with one method called 'hello'.
final String script = "var obj = new Object(); obj.hello = function(name) { print('Hello, ' + name); }";
// evaluate script
engine.eval(script);
// javax.script.Invocable is an optional interface.
// Check whether your script engine implements or not!
// Note that the JavaScript engine implements Invocable interface.
final Invocable inv = (Invocable) engine;
// get script object on which we want to call the method
final Object obj = engine.get("obj");
// invoke the method named "hello" on the script object "obj"
inv.invokeMethod(obj, "hello", "Script Method !!" );
}
public static void main(String[] args) throws Exception {
System.out.println("\nTest8\n");
ScriptEngineManager m = new ScriptEngineManager();
ScriptEngine e = Helper.getJsEngine(m);
if (e == null) {
System.out.println("Warning: No js engine found; test vacuously passes.");
return;
}
e.eval(new FileReader(
new File(System.getProperty("test.src", "."), "Test8.js")));
Invocable inv = (Invocable)e;
inv.invokeFunction("main", "Mustang");
// use method of a specific script object
Object scriptObj = e.get("scriptObj");
inv.invokeMethod(scriptObj, "main", "Mustang");
}
public static void main(final String[] args) throws Exception {
final ScriptEngineManager manager = new ScriptEngineManager();
final ScriptEngine engine = manager.getEngineByName("nashorn");
// JavaScript code in a String. This code defines a script object 'obj'
// with one method called 'hello'.
final String script = "var obj = new Object(); obj.hello = function(name) { print('Hello, ' + name); }";
// evaluate script
engine.eval(script);
// javax.script.Invocable is an optional interface.
// Check whether your script engine implements or not!
// Note that the JavaScript engine implements Invocable interface.
final Invocable inv = (Invocable) engine;
// get script object on which we want to call the method
final Object obj = engine.get("obj");
// invoke the method named "hello" on the script object "obj"
inv.invokeMethod(obj, "hello", "Script Method !!" );
}
@Override
protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request,
HttpServletResponse response) throws Exception {
try {
ScriptEngine engine = getEngine();
Invocable invocable = (Invocable) engine;
String url = getUrl();
String template = getTemplate(url);
Object html;
if (this.renderObject != null) {
Object thiz = engine.eval(this.renderObject);
html = invocable.invokeMethod(thiz, this.renderFunction, template, model, url);
}
else {
html = invocable.invokeFunction(this.renderFunction, template, model, url);
}
response.getWriter().write(String.valueOf(html));
}
catch (ScriptException ex) {
throw new ServletException("Failed to render script template", new StandardScriptEvalException(ex));
}
}
public static void main(final String[] args) throws Exception {
final ScriptEngineManager manager = new ScriptEngineManager();
final ScriptEngine engine = manager.getEngineByName("nashorn");
// JavaScript code in a String. This code defines a script object 'obj'
// with one method called 'hello'.
final String script = "var obj = new Object(); obj.hello = function(name) { print('Hello, ' + name); }";
// evaluate script
engine.eval(script);
// javax.script.Invocable is an optional interface.
// Check whether your script engine implements or not!
// Note that the JavaScript engine implements Invocable interface.
final Invocable inv = (Invocable) engine;
// get script object on which we want to call the method
final Object obj = engine.get("obj");
// invoke the method named "hello" on the script object "obj"
inv.invokeMethod(obj, "hello", "Script Method !!" );
}
private void invokeScriptedProcessorMethod(String methodName, Object... params) {
// Run the scripted processor's method here, if it exists
if (scriptEngine instanceof Invocable) {
final Invocable invocable = (Invocable) scriptEngine;
final Object obj = scriptEngine.get("processor");
if (obj != null) {
ComponentLog logger = getLogger();
try {
invocable.invokeMethod(obj, methodName, params);
} catch (final NoSuchMethodException nsme) {
if (logger.isDebugEnabled()) {
logger.debug("Configured script Processor does not contain the method " + methodName);
}
} catch (final Exception e) {
// An error occurred during onScheduled, propagate it up
logger.error("Error while executing the scripted processor's method " + methodName, e);
if (e instanceof ProcessException) {
throw (ProcessException) e;
}
throw new ProcessException(e);
}
}
}
}
public void execute(PropertyContext context, Action action, Map<String, Object> facts) {
// Attempt to call a non-ActionHandler interface method (i.e. execute(context, action, facts) from PropertyContextActionHandler)
final Invocable invocable = (Invocable) scriptEngine;
try {
// Get the actual object from the script engine, versus the proxy stored in ActionHandler. The object may have additional methods,
// where ActionHandler is a proxied interface
final Object obj = scriptEngine.get("actionHandler");
if (obj != null) {
try {
invocable.invokeMethod(obj, "execute", context, action, facts);
} catch (final NoSuchMethodException nsme) {
if (getLogger().isDebugEnabled()) {
getLogger().debug("Configured script ActionHandler is not a PropertyContextActionHandler and has no execute(context, action, facts) method, falling back to"
+ "execute(action, facts).");
}
execute(action, facts);
}
} else {
throw new ScriptException("No ActionHandler was defined by the script.");
}
} catch (ScriptException se) {
throw new ProcessException("Error executing onEnabled(context) method: " + se.getMessage(), se);
}
}
@OnDisabled
public void onDisabled(final ConfigurationContext context) {
// Call an non-interface method onDisabled(context), to allow a scripted LookupService the chance to shut down as necessary
final Invocable invocable = (Invocable) scriptEngine;
if (configurationContext != null) {
try {
// Get the actual object from the script engine, versus the proxy stored in lookupService. The object may have additional methods,
// where lookupService is a proxied interface
final Object obj = scriptEngine.get("lookupService");
if (obj != null) {
try {
invocable.invokeMethod(obj, "onDisabled", context);
} catch (final NoSuchMethodException nsme) {
if (getLogger().isDebugEnabled()) {
getLogger().debug("Configured script LookupService does not contain an onDisabled() method.");
}
}
} else {
throw new ScriptException("No LookupService was defined by the script.");
}
} catch (ScriptException se) {
throw new ProcessException("Error executing onDisabled(context) method", se);
}
}
}
public static ScriptEngine buildEngine() throws ScriptException, NoSuchMethodException {
NashornScriptEngineFactory factory = new NashornScriptEngineFactory();
ScriptEngine engine = factory.getScriptEngine(new SafeClassFilter());
Window window = new Window();
Object global = engine.eval("this");
Object jsObject = engine.eval("Object");
Invocable invocable = (Invocable) engine;
invocable.invokeMethod(jsObject, "bindProperties", global, window);
engine.eval("var window = this");
return engine;
}
/**
* 运行一个js方法
*/
public static Object invoke(ExtensionInfo extensionInfo, Event event, Object param, boolean async) throws NoSuchMethodException, ScriptException, FileNotFoundException, InterruptedException {
//初始化js引擎
ScriptEngine engine = ExtensionUtil.buildExtensionRuntimeEngine(extensionInfo);
Invocable invocable = (Invocable) engine;
//执行resolve方法
Object result = invocable.invokeFunction(StringUtils.isEmpty(event.getMethod()) ? event.getOn() : event.getMethod(), param);
//结果为null或者异步调用直接返回
if (result == null || async) {
return result;
}
final Object[] ret = {null};
//判断是不是返回Promise对象
ScriptContext ctx = new SimpleScriptContext();
ctx.setAttribute("result", result, ScriptContext.ENGINE_SCOPE);
boolean isPromise = (boolean) engine.eval("!!result&&typeof result=='object'&&typeof result.then=='function'", ctx);
if (isPromise) {
//如果是返回的Promise则等待执行完成
CountDownLatch countDownLatch = new CountDownLatch(1);
invocable.invokeMethod(result, "then", (Function) o -> {
try {
ret[0] = o;
} catch (Exception e) {
LOGGER.error("An exception occurred while resolve()", e);
} finally {
countDownLatch.countDown();
}
return null;
});
invocable.invokeMethod(result, "catch", (Function) o -> {
countDownLatch.countDown();
return null;
});
//等待解析完成
countDownLatch.await();
} else {
ret[0] = result;
}
return ret[0];
}
@Override
@OnEnabled
public void onEnabled(final ConfigurationContext context) {
synchronized (scriptingComponentHelper.isInitialized) {
if (!scriptingComponentHelper.isInitialized.get()) {
scriptingComponentHelper.createResources();
}
}
super.onEnabled(context);
// Call an non-interface method onEnabled(context), to allow a scripted LookupService the chance to set up as necessary
final Invocable invocable = (Invocable) scriptEngine;
if (configurationContext != null) {
try {
// Get the actual object from the script engine, versus the proxy stored in lookupService. The object may have additional methods,
// where lookupService is a proxied interface
final Object obj = scriptEngine.get("lookupService");
if (obj != null) {
try {
invocable.invokeMethod(obj, "onEnabled", context);
} catch (final NoSuchMethodException nsme) {
if (getLogger().isDebugEnabled()) {
getLogger().debug("Configured script LookupService does not contain an onEnabled() method.");
}
}
} else {
throw new ScriptException("No LookupService was defined by the script.");
}
} catch (ScriptException se) {
throw new ProcessException("Error executing onEnabled(context) method", se);
}
}
}
public String parse(String template) throws ScriptException {
// Hack until NETBEANS-2705 fixed
System.getProperties().setProperty("polyglot.js.nashorn-compat", "true");
String result = null;
try {
if (engine == null) {
engine = createEngine();
}
Object ejs = engine.eval("ejs");
Invocable invocable = (Invocable) engine;
Map<String, Object> options = new HashMap<>();
options.put("filename", "template");
if (importTemplate != null) {
options.put("ext", importTemplate);
}
if (delimiter != null) {
options.put("delimiter", delimiter);
}
result = (String) invocable.invokeMethod(ejs, "render", template, null, options);
} catch (NoSuchMethodException ex) {
Exceptions.printStackTrace(ex);
}
// Hack until NETBEANS-2705 fixed
System.getProperties().remove("polyglot.js.nashorn-compat");
return result;
}
public Object reduce(Object callback, Object initialValue) throws Exception {
ObjectMapper mapper = new ObjectMapper();
Invocable invocable = (Invocable) this.engine;
Object parser = this.engine.eval("JSON");
Object result = initialValue;
for (BattleLogDetail log : this.details) {
BattleLog battleLog = BattleLogs.read(log.getDate());
String json = mapper.writeValueAsString(battleLog);
Object obj = invocable.invokeMethod(parser, "parse", json);
result = ((JSObject) callback).call(null, result, obj);
}
return result;
}
@Override
@OnEnabled
public void onEnabled(final ConfigurationContext context) {
synchronized (scriptingComponentHelper.isInitialized) {
if (!scriptingComponentHelper.isInitialized.get()) {
scriptingComponentHelper.createResources();
}
}
super.onEnabled(context);
// Call an non-interface method onEnabled(context), to allow a scripted RulesEngineService the chance to set up as necessary
final Invocable invocable = (Invocable) scriptEngine;
if (configurationContext != null) {
try {
// Get the actual object from the script engine, versus the proxy stored in RulesEngineService. The object may have additional methods,
// where RulesEngineService is a proxied interface
final Object obj = scriptEngine.get("rulesEngine");
if (obj != null) {
try {
invocable.invokeMethod(obj, "onEnabled", context);
} catch (final NoSuchMethodException nsme) {
if (getLogger().isDebugEnabled()) {
getLogger().debug("Configured script RulesEngineService does not contain an onEnabled() method.");
}
}
} else {
throw new ScriptException("No RulesEngineService was defined by the script.");
}
} catch (ScriptException se) {
throw new ProcessException("Error executing onEnabled(context) method: " + se.getMessage(), se);
}
}
}
@Override
@OnEnabled
public void onEnabled(final ConfigurationContext context) {
synchronized (scriptingComponentHelper.isInitialized) {
if (!scriptingComponentHelper.isInitialized.get()) {
scriptingComponentHelper.createResources();
}
}
super.onEnabled(context);
// Call an non-interface method onEnabled(context), to allow a scripted ActionHandler the chance to set up as necessary
final Invocable invocable = (Invocable) scriptEngine;
if (configurationContext != null) {
try {
// Get the actual object from the script engine, versus the proxy stored in ActionHandler. The object may have additional methods,
// where ActionHandler is a proxied interface
final Object obj = scriptEngine.get("actionHandler");
if (obj != null) {
try {
invocable.invokeMethod(obj, "onEnabled", context);
} catch (final NoSuchMethodException nsme) {
if (getLogger().isDebugEnabled()) {
getLogger().debug("Configured script ActionHandler does not contain an onEnabled() method.");
}
}
} else {
throw new ScriptException("No ActionHandler was defined by the script.");
}
} catch (ScriptException se) {
throw new ProcessException("Error executing onEnabled(context) method", se);
}
}
}
public void callJavaScriptClassFactoryFromJava() throws Exception {
String src = "\n"
+ "(function() {\n"
+ " class JSIncrementor {\n"
+ " constructor(init) {\n"
+ " this.value = init;\n"
+ " }\n"
+ " inc() {\n"
+ " return ++this.value;\n"
+ " }\n"
+ " dec() {\n"
+ " return --this.value;\n"
+ " }\n"
+ " }\n"
+ " return function(init) {\n"
+ " return new JSIncrementor(init);\n"
+ " }\n"
+ "})\n";
// Evaluate JavaScript function definition
Object jsFunction = engine.eval(src);
final Invocable inv = (Invocable) engine;
// Execute the JavaScript function
Object jsFactory = inv.invokeMethod(jsFunction, "call");
// Execute the JavaScript factory to create Java objects
Incrementor initFive = inv.getInterface(
inv.invokeMethod(jsFactory, "call", null, 5),
Incrementor.class
);
Incrementor initTen = inv.getInterface(
inv.invokeMethod(jsFactory, "call", null, 10),
Incrementor.class
);
initFive.inc();
assertEquals("Now at seven", 7, initFive.inc());
initTen.dec();
assertEquals("Now at eight", 8, initTen.dec());
initTen.dec();
assertEquals("Values are the same", initFive.value(), initTen.value());
}