Examples of org.apache.bsf.BSFManager

org.apache.bsf.BSFManager
This class is the entry point to the bean scripting framework. An application wishing to integrate scripting to a Java app would place an instance of a BSFManager in their code and use its services to register the beans they want to make available for scripting, load scripting engines, and run scripts.
BSFManager serves as the registry of available scripting engines as well. Loading and unloading of scripting engines is supported as well. Each BSFManager loads one engine per language. Several BSFManagers can be created per JVM. @author Sanjiva Weerawarana @author Matthew J. Duftler @author Sam Ruby @author Olivier Gruber (added original debugging support) @author Don Schwarz (added support for registering languages dynamically)

     * Test of apply method, of class JRubyEngine.
     */
    @Test
    public void testApply() throws BSFException {
        logger1.info("apply");
        BSFManager manager = new BSFManager();
        JRubyEngine instance = new JRubyEngine();
        instance.initialize(manager, "jruby", null);
        String file = "";
        int line = 0;
        int col = 0;

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     */
    @Test
    public void testEval() throws Exception {
        logger1.info("eval");
        BSFManager.registerScriptingEngine("jruby", "org.jruby.embed.bsf.JRubyEngine", new String[] {"rb"});
        BSFManager manager = new BSFManager();
        JRubyEngine instance = new JRubyEngine();
        instance.initialize(manager, "jruby", null);
        String file = "";
        int line = 0;
        int col = 0;
        Object expr = null;
        Object expResult = null;
        Object result = instance.eval(file, line, col, expr);
        assertEquals(expResult, result);


        expResult = "HELLO WORLD!";
        result = instance.eval("<script>", 0, 0, "message=\"Hello \" + \"World!\"\nmessage.upcase");
        assertEquals(expResult, result);


        manager.declareBean("greet", "Heeey", String.class);
        result = manager.eval("jruby", "<script>", 0, 0, "message=$greet + \" World!\"");
        expResult = "Heeey World!";
        assertEquals(expResult, result);
    }

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     * Test of exec method, of class JRubyEngine.
     */
    @Test
    public void testExec() throws Exception {
        logger1.info("exec");
        BSFManager manager = new BSFManager();
        JRubyEngine instance = new JRubyEngine();
        instance.initialize(manager, "jruby", null);
        String file = "";
        int line = 0;
        int col = 0;

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     */
    @Test
    public void testCall() throws Exception {
        logger1.info("call");
        BSFManager.registerScriptingEngine("jruby", "org.jruby.embed.bsf.JRubyEngine", new String[] {"rb"});
        BSFManager manager = new BSFManager();
        JRubyEngine instance = (JRubyEngine) manager.loadScriptingEngine("jruby");
        instance.initialize(manager, "jruby", null);
        Object recv = null;
        String method = "";
        Object[] args = null;
        Object expResult = null;
        Object result = instance.call(recv, method, args);
        assertEquals(expResult, result);


        String script =
                "# Radioactive decay\n" +
                "def amount_after_years(q0, t)\n" +
                  "q0 * Math.exp(1.0 / $h * Math.log(1.0/2.0) * t)\n" +
                "end\n" +
                "def years_to_amount(q0, q)\n" +
                  "$h * (Math.log(q) - Math.log(q0)) / Math.log(1.0/2.0)\n" +
                "end";
        recv = manager.eval("jruby", "radioactive_decay", 0, 0, script);
        method = "amount_after_years";
        args = new Object[2];
        args[0] = 10.0; args[1] = 1000;
        
        // Radium
        manager.declareBean("h", 1599, Long.class);
        result = instance.call(recv, method, args);
        assertEquals(6.482, (Double)result, 0.001);


        method = "years_to_amount";
        args[0] = 10.0; args[1] = 1.0;

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     * Test of initialize method, of class JRubyEngine.
     */
    @Test
    public void testInitialize() throws Exception {
        logger1.info("initialize");
        BSFManager manager = new BSFManager();;
        String language = "";
        Vector someDeclaredBeans = null;
        JRubyEngine instance = new JRubyEngine();
        instance.initialize(manager, language, someDeclaredBeans);
    }

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     * Test of declareBean method, of class JRubyEngine.
     */
    @Test
    public void testDeclareBean() throws Exception {
        logger1.info("declareBean");
        BSFManager manager = new BSFManager();
        JRubyEngine instance = new JRubyEngine();
        instance.initialize(manager, "jruby", null);
        manager.declareBean("abc", "aaabbbccc", String.class);
        BSFDeclaredBean bean = (BSFDeclaredBean) manager.getObjectRegistry().lookup("abc");
        instance.declareBean(bean);
    }

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     * Test of undeclareBean method, of class JRubyEngine.
     */
    @Test
    public void testUndeclareBean() throws Exception {
        logger1.info("undeclareBean");
        BSFManager manager = new BSFManager();
        JRubyEngine instance = new JRubyEngine();
        instance.initialize(manager, "jruby", null);
        manager.declareBean("abc", "aaabbbccc", String.class);
        BSFDeclaredBean bean = (BSFDeclaredBean) manager.getObjectRegistry().lookup("abc");
        instance.undeclareBean(bean);
    }

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     * Test of handleException method, of class JRubyEngine.
     */
    @Test
    public void testHandleException() throws BSFException {
        logger1.info("handleException");
        BSFManager manager = new BSFManager();
        JRubyEngine instance = new JRubyEngine();
        instance.initialize(manager, "jruby", null);
        BSFException bsfExcptn = new BSFException(BSFException.REASON_EXECUTION_ERROR, "test", new NullPointerException());
        instance.handleException(bsfExcptn);
    }

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    public void setUp() throws Exception {
        super.setUp();
        BSFManager.registerScriptingEngine("ruby", "org.jruby.javasupport.bsf.JRubyEngine", new String[] { "rb" });
        
        manager = new BSFManager();
        String expression = loadScript(RUBY_SCRIPT);
        assertNotNull("Script loaded from " + RUBY_SCRIPT + " should exist", expression);
        manager.exec("ruby", "(java)", 1, 1, expression);
    }

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    private static final long serialVersionUID = 234L;


    public void sampleOccurred(SampleEvent event) {
        try {
            BSFManager mgr = getManager();
            if (mgr == null) {
                log.error("Problem creating BSF manager");
                return;
            }
            mgr.declareBean("sampleEvent", event, SampleEvent.class);
            SampleResult result = event.getResult();
            mgr.declareBean("sampleResult", result, SampleResult.class);
            processFileOrScript(mgr);
            mgr.terminate();
        } catch (BSFException e) {
            log.warn("Problem in BSF script "+e);
        }
    }

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