Can you explain what happens in Dispatcher Servlet Initialization?

INFO: Initializing Spring FrameworkServlet 'dispatcherServlet'
Aug 20, 2012 12:36:47 PM org.springframework.web.servlet.FrameworkServlet initServletBean
INFO: FrameworkServlet 'dispatcherServlet': initialization started
Aug 20, 2012 12:36:47 PM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.web.context.support.XmlWebApplicationContext@302a0a5: display name [WebApplicationContext for namespace 'dispatcherServlet-servlet']; startup date [Mon Aug 20 12:36:47 EDT 2012]; root of context hierarchy
Aug 20, 2012 12:36:47 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/dispatcherServlet-servlet.xml]
Aug 20, 2012 12:36:47 PM org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory
INFO: Bean factory for application context [org.springframework.web.context.support.XmlWebApplicationContext@302a0a5]: org.springframework.beans.factory.support.DefaultListableBeanFactory@6b98e8b4
Aug 20, 2012 12:36:47 PM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@6b98e8b4: defining beans [beanNameUrlMapping,viewResolver,/home.htm]; root of factory hierarchy
Aug 20, 2012 12:36:47 PM org.springframework.web.servlet.FrameworkServlet initServletBean
INFO: FrameworkServlet 'dispatcherServlet': initialization completed in 149 ms