public void execute()

in tooling/camel-karaf-maven-plugin/src/main/java/org/apache/camel/maven/KarafRunMojo.java [365:443]
63 lines of code
10 McCabe index (conditional complexity)

    public void execute() throws MojoExecutionException, MojoFailureException {
        List<String> args = parseArguments();
        arguments = new String[args.size()];
        args.toArray(arguments);

        if (getLog().isDebugEnabled()) {
            StringBuilder msg = new StringBuilder("Invoking: ");
            msg.append(mainClass);
            msg.append(".main(");
            for (int i = 0; i < arguments.length; i++) {
                if (i > 0) {
                    msg.append(", ");
                }
                msg.append(arguments[i]);
            }
            msg.append(")");
            getLog().debug(msg);
        }

        final ClassLoader loader = getClassLoader();
        KarafRunMojo.IsolatedThreadGroup threadGroup = new KarafRunMojo.IsolatedThreadGroup(mainClass /* name */);

        final Thread bootstrapThread = new Thread(threadGroup, new Runnable() {
            public void run() {
                try {
                    beforeBootstrapCamel();

                    getLog().info("Starting Camel ...");
                    Method main = Thread.currentThread().getContextClassLoader()
                            .loadClass(mainClass).getMethod("main", String[].class);
                    main.invoke(null, new Object[] { arguments });

                    afterBootstrapCamel();
                } catch (Exception e) { // just pass it on
                    // let it be printed so end users can see the exception on the console
                    getLog().error("*************************************");
                    getLog().error("Error occurred while running main from: " + mainClass);
                    getLog().error(e);
                    getLog().error("*************************************");
                    Thread.currentThread().getThreadGroup().uncaughtException(Thread.currentThread(), e);
                }
            }
        }, mainClass + ".main()");

        bootstrapThread.setContextClassLoader(loader);
        setSystemProperties();

        bootstrapThread.start();
        joinNonDaemonThreads(threadGroup);
        // It's plausible that spontaneously a non-daemon thread might be
        // created as we try and shut down,
        // but it's too late since the termination condition (only daemon
        // threads) has been triggered.
        if (keepAlive) {
            getLog().warn("Warning: keepAlive is now deprecated and obsolete. Do you need it? Please comment on MEXEC-6.");
            waitFor(0);
        }

        if (cleanupDaemonThreads) {
            terminateThreads(threadGroup);
            try {
                threadGroup.destroy();
            } catch (IllegalThreadStateException e) {
                getLog().warn("Couldn't destroy threadgroup " + threadGroup, e);
            }
        }

        if (originalSystemProperties != null) {
            System.setProperties(originalSystemProperties);
        }

        synchronized (threadGroup) {
            if (threadGroup.uncaughtException != null) {
                throw new MojoExecutionException(null, threadGroup.uncaughtException);
            }
        }

        registerSourceRoots();
    }