private static void doStart()

in winegrower-extension/winegrower-agent/src/main/java/org/apache/winegrower/extension/agent/WinegrowerAgent.java [114:152]
34 lines of code
5 McCabe index (conditional complexity)

    private static void doStart(final String agentArgs, final Instrumentation instrumentation) throws Throwable {
        final ClassLoader loader = Thread.currentThread().getContextClassLoader();
        final Class<?> bundleClass = loader.loadClass("org.osgi.framework.Bundle");
        final Class<?> ripenerImplClass = loader.loadClass("org.apache.winegrower.Ripener$Impl");
        final Class<?> ripenerConfigurationClass = loader.loadClass("org.apache.winegrower.Ripener$Configuration");

        final Object ripener = ripenerImplClass.getConstructor(ripenerConfigurationClass)
                                               .newInstance(createConfiguration(ripenerConfigurationClass, agentArgs));

        // before start - avoids reload/refresh
        final Object services = ripenerImplClass.getMethod("getServices").invoke(ripener);
        final Object bundleRegistry = ripenerImplClass.getMethod("getRegistry").invoke(ripener);
        final Object bundleLifecycle0 = Map.class.cast(bundleRegistry.getClass().getMethod("getBundles").invoke(bundleRegistry)).get(0L);
        final Object bundle0 = bundleLifecycle0.getClass().getMethod("getBundle").invoke(bundleLifecycle0);
        services.getClass().getMethod("registerService", String[].class, Object.class, Dictionary.class, bundleClass)
                .invoke(services, new String[]{Instrumentation.class.getName()}, instrumentation, new Hashtable<>(), bundle0);

        doCall(ripener, "start", new Class<?>[0], new Object[0]);
        System.setProperty("winegrower.agent.started", "true");
        final Thread stopThread = new Thread(() -> {
            try {
                doCall(ripener, "stop", new Class<?>[0], new Object[0]);
            } catch (final Throwable throwable) {
                if (DEBUG) {
                    throwable.printStackTrace();
                } // else: not that important
            } finally {
                if (WinegrowerAgentClassLoader.class.isInstance(loader)) {
                    try {
                        WinegrowerAgentClassLoader.class.cast(loader).close();
                    } catch (final IOException e) {
                        // no-op
                    }
                }
            }
        }, WinegrowerAgent.class.getName() + "-shutdown");
        stopThread.setContextClassLoader(loader);
        Runtime.getRuntime().addShutdownHook(stopThread);
    }