public boolean start()

in src/main/java/org/apache/sling/launchpad/base/app/MainDelegate.java [124:208]
54 lines of code
11 McCabe index (conditional complexity)

    public boolean start() {

        Map<String, String> props = new HashMap<String, String>();

        // parse the command line (exit in case of failure)
        if (commandLine == null) {
            setCommandLine(new HashMap<String, String>());
        }

        // if sling.home was set on the command line, set it in the properties
        if (slingHome != null) {
            props.put(SharedConstants.SLING_HOME, slingHome);
        } else if (commandLine.containsKey(SharedConstants.SLING_HOME)) {
            props.put(SharedConstants.SLING_HOME,
                commandLine.get(SharedConstants.SLING_HOME));
        }

        // ensure sling.launchpad is set
        if (!commandLine.containsKey(SharedConstants.SLING_LAUNCHPAD)) {
            commandLine.put(SharedConstants.SLING_LAUNCHPAD, slingHome);
        }

        // check sling.properties in the command line
        final String slingPropertiesProp = commandLine.remove(SharedConstants.SLING_PROPERTIES);
        if (slingPropertiesProp != null) {
            props.put(SharedConstants.SLING_PROPERTIES, slingPropertiesProp);
        }

        // set up and configure Felix Logger
        int logLevel;
        if (!commandLine.containsKey(PROP_LOG_LEVEL)) {
            logLevel = DEFAULT_LOG_LEVEL;
        } else {
            logLevel = toLogLevelInt(commandLine.get(PROP_LOG_LEVEL),
                DEFAULT_LOG_LEVEL);
            commandLine.put(LOG_LEVEL_PROP, String.valueOf(logLevel));
        }
        final Logger logger = new SlingLogger();

        // default log level: prevent tons of needless WARN from the framework
        logger.setLogLevel(Logger.LOG_ERROR);
        if ( System.getProperty(PROP_BOOT_LOG_LEVEL) != null ) {
            try {
                logger.setLogLevel(
                    Integer.parseInt(System.getProperty(PROP_BOOT_LOG_LEVEL)));
            } catch (final NumberFormatException ex) {
                // just ignore
            }
        }

        try {
            LaunchpadContentProvider resProvider = new ClassLoaderResourceProvider(
                getClass().getClassLoader());

            // creating the instance launches the framework and we are done here
            // ..
            sling = new Sling(notifiable, logger, resProvider, props) {

                // overwrite the loadPropertiesOverride method to inject the
                // command line arguments unconditionally. These will not be
                // persisted in any properties file, though
                @Override
                protected void loadPropertiesOverride(
                        Map<String, String> properties) {
                    if (commandLine != null) {
                        properties.putAll(commandLine);
                    }

                    // Display port number on console, in case HttpService doesn't. This is logged as late as
                    // possible in order to pick up defaults from the Sling property files, although system
                    // property substitutions will be missed.
                    info("HTTP server port: " + properties.get(PROP_PORT), null);
                }
            };

            // we successfully started it
            return true;

        } catch (BundleException be) {
            error("Failed to Start OSGi framework", be);
        }

        // we failed to start
        return false;
    }