public void start()

in jndi/jndi-core/src/main/java/org/apache/aries/jndi/startup/Activator.java [120:203]
72 lines of code
12 McCabe index (conditional complexity)

    public void start(BundleContext context) {
        instance = this;
        BundleContext trackerBundleContext;
        /* Use system context to allow trackers full bundle/service visibility. */
        if ( !Boolean.getBoolean("org.apache.aries.jndi.trackersUseLocalContext") ){
        	trackerBundleContext = context.getBundle(Constants.SYSTEM_BUNDLE_LOCATION).getBundleContext();
        	if (trackerBundleContext==null) {
                throw new IllegalStateException("Bundle could not aquire system bundle context.");
        	}
        }
        else {
        	trackerBundleContext = context;
        }
        
        bundleServiceCaches = 
        		new BundleTracker<ServiceCache>(trackerBundleContext, Bundle.STARTING | Bundle.ACTIVE | Bundle.STOPPING , null) {
            @Override
            public ServiceCache addingBundle(Bundle bundle, BundleEvent event) {
                return new ServiceCache(bundle.getBundleContext());
            }
            @Override
            public void modifiedBundle(Bundle bundle, BundleEvent event, ServiceCache object) {
            }
        };
        bundleServiceCaches.open();

        initialContextFactories = new CachingServiceTracker<>(trackerBundleContext, InitialContextFactory.class, Activator::getInitialContextFactoryInterfaces);
        objectFactories = new CachingServiceTracker<>(trackerBundleContext, ObjectFactory.class, Activator::getObjectFactorySchemes);
        icfBuilders = new CachingServiceTracker<>(trackerBundleContext, InitialContextFactoryBuilder.class);
        urlObjectFactoryFinders = new CachingServiceTracker<>(trackerBundleContext, URLObjectFactoryFinder.class);

        if (!isPropertyEnabled(context, DISABLE_BUILDER)) {
            try {
                OSGiInitialContextFactoryBuilder builder = new OSGiInitialContextFactoryBuilder();
                try {
                    NamingManager.setInitialContextFactoryBuilder(builder);
                } catch (IllegalStateException e) {
                    // use reflection to force the builder to be used
                    if (isPropertyEnabled(context, FORCE_BUILDER)) {
                        originalICFBuilder = swapStaticField(InitialContextFactoryBuilder.class, builder);
                    }
                }
                icfBuilder = builder;
            } catch (NamingException e) {
                LOGGER.debug("A failure occurred when attempting to register an InitialContextFactoryBuilder with the NamingManager. " +
                        "Support for calling new InitialContext() will not be enabled.", e);
            } catch (IllegalStateException e) {
                // Log the problem at info level, but only log the exception at debug level, as in many cases this is not a real issue and people
                // don't want to see stack traces at info level when everything it working as expected.
                String msg = "It was not possible to register an InitialContextFactoryBuilder with the NamingManager because " +
                        "another builder called " + getClassName(InitialContextFactoryBuilder.class) + " was already registered. Support for calling new InitialContext() will not be enabled.";
                LOGGER.info(msg);
                LOGGER.debug(msg, e);
            }

            try {
                OSGiObjectFactoryBuilder builder = new OSGiObjectFactoryBuilder(context);
                try {
                    NamingManager.setObjectFactoryBuilder(builder);
                } catch (IllegalStateException e) {
                    // use reflection to force the builder to be used
                    if (isPropertyEnabled(context, FORCE_BUILDER)) {
                        originalOFBuilder = swapStaticField(ObjectFactoryBuilder.class, builder);
                    }
                }
                ofBuilder = builder;
            } catch (NamingException e) {
                LOGGER.info("A failure occurred when attempting to register an ObjectFactoryBuilder with the NamingManager. " +
                        "Looking up certain objects may not work correctly.", e);
            } catch (IllegalStateException e) {
                // Log the problem at info level, but only log the exception at debug level, as in many cases this is not a real issue and people
                // don't want to see stack traces at info level when everything it working as expected.
                String msg = "It was not possible to register an ObjectFactoryBuilder with the NamingManager because " +
                        "another builder called " + getClassName(ObjectFactoryBuilder.class) + " was already registered. Looking up certain objects may not work correctly.";
                LOGGER.info(msg);
                LOGGER.debug(msg, e);
            }
        }

        context.registerService(JNDIProviderAdmin.class.getName(), new ProviderAdminServiceFactory(context), null);
        context.registerService(InitialContextFactoryBuilder.class.getName(), new JREInitialContextFactoryBuilder(), null);
        context.registerService(JNDIContextManager.class.getName(), new ContextManagerServiceFactory(), null);
        context.registerService(AugmenterInvoker.class.getName(), augmenterInvoker = new AugmenterInvokerImpl(context), null);
    }