spring reference 阅读笔记

synchronized (this.startupShutdownMonitor) {
          
         prepareRefresh();
            // Tell the subclass to refresh the internal bean factory.
          ConfigurableListableBeanFactory beanFactory = obtainFreshBeanFactory();
          // Prepare the bean factory for use in this context.
            prepareBeanFactory(beanFactory);
         try {
               // Allows post-processing of the bean factory in context subclasses.
                postProcessBeanFactory(beanFactory);
             // Invoke factory processors registered as beans in the context.
                invokeBeanFactoryPostProcessors(beanFactory);
                // Register bean processors that intercept bean creation.
               registerBeanPostProcessors(beanFactory);ff
               // Initialize message source for this context.
              initMessageSource();
             // Initialize event multicaster for this context.
               initApplicationEventMulticaster();
               // Initialize other special beans in specific context subclasses.
               onRefresh();
             // Check for listener beans and register them.
              registerListeners();
             // Instantiate all remaining (non-lazy-init) singletons.
                finishBeanFactoryInitialization(beanFactory);
                // Last step: publish corresponding event.
              finishRefresh();
         }
            catch (BeansException ex) {
             if (logger.isWarnEnabled()) {
                   logger.warn("Exception encountered during context initialization - " +
                           "cancelling refresh attempt: " + ex);
                }
                // Destroy already created singletons to avoid dangling resources.
              destroyBeans();
              // Reset 'active' flag.
             cancelRefresh(ex);
               // Propagate exception to caller.
               throw ex;
           }
            finally {
               // Reset common introspection caches in Spring's core, since we
             // might not ever need metadata for singleton beans anymore...
              resetCommonCaches();
         }
        }