public synchronized void shutDown()

in commons-jcs3-core/src/main/java/org/apache/commons/jcs3/engine/control/CompositeCacheManager.java [587:663]
56 lines of code
9 McCabe index (conditional complexity)

    public synchronized void shutDown()
    {
        // shutdown element event queue
        if (this.elementEventQueue != null)
        {
            this.elementEventQueue.dispose();
        }

        // notify any observers
        IShutdownObserver observer = null;
        while ((observer = shutdownObservers.poll()) != null)
        {
            observer.shutdown();
        }

        // Unregister JMX bean
        if (isJMXRegistered)
        {
            final MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
            try
            {
                final ObjectName jmxObjectName = new ObjectName(jmxName);
                mbs.unregisterMBean(jmxObjectName);
            }
            catch (final Exception e)
            {
                log.warn( "Could not unregister JMX bean.", e );
            }

            isJMXRegistered = false;
        }

        // do the traditional shutdown of the regions.
        getCacheNames().forEach(this::freeCache);

        // shut down auxiliaries
        for (final String key : auxiliaryCaches.keySet())
        {
            try
            {
                freeAuxiliaryCache(key);
            }
            catch (final IOException e)
            {
                log.warn("Auxiliary cache {0} failed to shut down", key, e);
            }
        }

        // shut down factories
        auxiliaryFactoryRegistry.values().forEach(AuxiliaryCacheFactory::dispose);

        auxiliaryAttributeRegistry.clear();
        auxiliaryFactoryRegistry.clear();

        // shutdown all scheduled jobs
        this.scheduledExecutor.shutdownNow();

        // shutdown all thread pools
        ThreadPoolManager.dispose();

        if (shutdownHook != null)
        {
            try
            {
                Runtime.getRuntime().removeShutdownHook(shutdownHook);
            }
            catch (final IllegalStateException e)
            {
                // May fail if the JVM is already shutting down
            }

            this.shutdownHook = null;
        }

        isConfigured = false;
        isInitialized = false;
    }