public void start()

in deltaspike/modules/scheduler/impl/src/main/java/org/apache/deltaspike/scheduler/impl/AbstractQuartzScheduler.java [70:145]
71 lines of code
11 McCabe index (conditional complexity)

    public void start()
    {
        if (this.scheduler != null)
        {
            throw new UnsupportedOperationException("the scheduler is started already");
        }

        SchedulerFactory schedulerFactory = null;
        try
        {
            Properties properties = new Properties();
            properties.put(StdSchedulerFactory.PROP_SCHED_JOB_FACTORY_CLASS, CdiAwareJobFactory.class.getName());

            try
            {
                ResourceBundle config = loadCustomQuartzConfig();

                Enumeration<String> keys = config.getKeys();
                String key;
                while (keys.hasMoreElements())
                {
                    key = keys.nextElement();
                    properties.put(key, config.getString(key));
                }
            }
            catch (Exception e1)
            {
                LOG.info("no custom quartz-config file found. falling back to the default config provided by quartz.");

                InputStream inputStream = null;
                try
                {
                    inputStream = ClassUtils.getClassLoader(null).getResourceAsStream("org/quartz/quartz.properties");
                    properties.load(inputStream);
                }
                catch (Exception e2)
                {
                    LOG.warning("failed to load quartz default-config");
                    schedulerFactory = new StdSchedulerFactory();
                }
                finally
                {
                    if (inputStream != null)
                    {
                        inputStream.close();
                    }
                }
            }
            if (schedulerFactory == null)
            {
                schedulerFactory = new StdSchedulerFactory(properties);
            }
        }
        catch (Exception e)
        {
            LOG.log(Level.WARNING, "fallback to default scheduler-factory", e);
            schedulerFactory = new StdSchedulerFactory();
        }

        try
        {
            this.scheduler = schedulerFactory.getScheduler();
            if (SchedulerBaseConfig.LifecycleIntegration.START_SCOPES_PER_JOB)
            {
                this.scheduler.getListenerManager().addJobListener(new InjectionAwareJobListener());
            }
            if (!this.scheduler.isStarted())
            {
                this.scheduler.startDelayed(SchedulerBaseConfig.LifecycleIntegration.DELAYED_START_IN_SECONDS);
            }
        }
        catch (SchedulerException e)
        {
            throw ExceptionUtils.throwAsRuntimeException(e);
        }
    }