Example usage for javax.script ScriptEngine eval

Introduction

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

Prototype

public Object eval(Reader reader, Bindings n) throws ScriptException;

Source Link

Document

Same as eval(String, Bindings) except that the source of the script is provided as a Reader.

Usage

From source file:org.jahia.services.content.rules.RulesNotificationService.java

private void sendMail(String template, Object user, String toMail, String fromMail, String ccList,
        String bcclist, Locale locale, KnowledgeHelper drools)
        throws RepositoryException, ScriptException, IOException {
    if (!notificationService.isEnabled()) {
        return;//from ww w.  j a  v  a  2 s .  c  o m
    }
    if (StringUtils.isEmpty(toMail)) {
        logger.warn("A mail couldn't be sent because to: has no recipient");
        return;
    }

    // Resolve template :
    String extension = StringUtils.substringAfterLast(template, ".");
    ScriptEngine scriptEngine = scriptEngineUtils.scriptEngine(extension);
    ScriptContext scriptContext = new SimpleScriptContext();
    final Bindings bindings = new SimpleBindings();
    bindings.put("currentUser", user);
    bindings.put("contextPath", Jahia.getContextPath());
    bindings.put("currentLocale", locale);
    final Object object = drools.getMatch().getTuple().getHandle().getObject();
    JCRNodeWrapper node = null;
    if (object instanceof AbstractNodeFact) {
        node = ((AbstractNodeFact) object).getNode();
        bindings.put("currentNode", node);
        final int siteURLPortOverride = SettingsBean.getInstance().getSiteURLPortOverride();
        bindings.put("servername",
                "http" + (siteURLPortOverride == 443 ? "s" : "") + "://" + node.getResolveSite().getServerName()
                        + ((siteURLPortOverride != 0 && siteURLPortOverride != 80 && siteURLPortOverride != 443)
                                ? ":" + siteURLPortOverride
                                : ""));
    }
    InputStream scriptInputStream = JahiaContextLoaderListener.getServletContext()
            .getResourceAsStream(template);
    if (scriptInputStream == null && node != null) {
        RulesListener rulesListener = RulesListener.getInstance(node.getSession().getWorkspace().getName());
        String packageName = drools.getRule().getPackageName();
        JahiaTemplateManagerService jahiaTemplateManagerService = ServicesRegistry.getInstance()
                .getJahiaTemplateManagerService();
        for (Map.Entry<String, String> entry : rulesListener.getModulePackageNameMap().entrySet()) {
            if (packageName.equals(entry.getValue())) {
                JahiaTemplatesPackage templatePackage = jahiaTemplateManagerService
                        .getTemplatePackage(entry.getKey());
                Resource resource = templatePackage.getResource(template);
                if (resource != null) {
                    scriptInputStream = resource.getInputStream();
                    break;
                }
            }
        }
    }
    if (scriptInputStream != null) {
        String resourceBundleName = StringUtils.substringBeforeLast(Patterns.SLASH
                .matcher(StringUtils.substringAfter(Patterns.WEB_INF.matcher(template).replaceAll(""), "/"))
                .replaceAll("."), ".");
        String subject = "";
        try {
            ResourceBundle resourceBundle = ResourceBundles.get(resourceBundleName, locale);
            bindings.put("bundle", resourceBundle);
            subject = resourceBundle.getString("subject");
        } catch (MissingResourceException e) {
            if (node != null) {
                final Value[] values = node.getResolveSite().getProperty("j:installedModules").getValues();
                for (Value value : values) {
                    try {
                        ResourceBundle resourceBundle = ResourceBundles
                                .get(ServicesRegistry.getInstance().getJahiaTemplateManagerService()
                                        .getTemplatePackageById(value.getString()).getName(), locale);
                        subject = resourceBundle.getString(
                                drools.getRule().getName().toLowerCase().replaceAll(" ", ".") + ".subject");
                        bindings.put("bundle", resourceBundle);
                    } catch (MissingResourceException ee) {
                        // Do nothing
                    }
                }
            }
        }
        Reader scriptContent = null;
        try {
            scriptContent = new InputStreamReader(scriptInputStream);
            scriptContext.setWriter(new StringWriter());
            // The following binding is necessary for Javascript, which doesn't offer a console by default.
            bindings.put("out", new PrintWriter(scriptContext.getWriter()));
            scriptContext.setBindings(bindings, ScriptContext.ENGINE_SCOPE);
            scriptContext.setBindings(scriptEngine.getContext().getBindings(ScriptContext.GLOBAL_SCOPE),
                    ScriptContext.GLOBAL_SCOPE);
            scriptEngine.eval(scriptContent, scriptContext);
            StringWriter writer = (StringWriter) scriptContext.getWriter();
            String body = writer.toString();
            notificationService.sendMessage(fromMail, toMail, ccList, bcclist, subject, null, body);
        } finally {
            if (scriptContent != null) {
                IOUtils.closeQuietly(scriptContent);
            }
        }
    }
}