1. DispatcherServlet
protected void onRefresh(ApplicationContext context)
{
initStrategies(context);
}
protected void initStrategies(ApplicationContext context)
{
initMultipartResolver(context);
initLocaleResolver(context);
initThemeResolver(context);
initHandlerMappings(context);
initHandlerAdapters(context);
initHandlerExceptionResolvers(context);
initRequestToViewNameTranslator(context);
initViewResolvers(context);
initFlashMapManager(context);
}2. FrameworkServlet
protected final void initServletBean()
throws ServletException
{
getServletContext().log("Initializing Spring FrameworkServlet '" + getServletName() + "'");
if (this.logger.isInfoEnabled()) {
this.logger.info("FrameworkServlet '" + getServletName() + "': initialization started");
}
long startTime = System.currentTimeMillis();
try
{
this.webApplicationContext = initWebApplicationContext();
initFrameworkServlet();
}
catch (ServletException ex)
{
this.logger.error("Context initialization failed", ex);
throw ex;
}
catch (RuntimeException ex)
{
this.logger.error("Context initialization failed", ex);
throw ex;
}
if (this.logger.isInfoEnabled())
{
long elapsedTime = System.currentTimeMillis() - startTime;
this.logger.info("FrameworkServlet '" + getServletName() + "': initialization completed in " + elapsedTime + " ms");
}
}initWebApplicationContext
protected WebApplicationContext initWebApplicationContext()
{
WebApplicationContext rootContext = WebApplicationContextUtils.getWebApplicationContext(getServletContext());
WebApplicationContext wac = null;
if (this.webApplicationContext != null)
{
wac = this.webApplicationContext;
if ((wac instanceof ConfigurableWebApplicationContext))
{
ConfigurableWebApplicationContext cwac = (ConfigurableWebApplicationContext)wac;
if (!cwac.isActive())
{
if (cwac.getParent() == null) {
cwac.setParent(rootContext);
}
configureAndRefreshWebApplicationContext(cwac);
}
}
}
if (wac == null) {
wac = findWebApplicationContext();
}
if (wac == null) {
wac = createWebApplicationContext(rootContext);
}
if (!this.refreshEventReceived) {
onRefresh(wac);
}
if (this.publishContext)
{
String attrName = getServletContextAttributeName();
getServletContext().setAttribute(attrName, wac);
if (this.logger.isDebugEnabled()) {
this.logger.debug("Published WebApplicationContext of servlet '" + getServletName() + "' as ServletContext attribute with name [" + attrName + "]");
}
}
return wac;
}configureRefreshWebApplicationContext:
protected void configureAndRefreshWebApplicationContext(ConfigurableWebApplicationContext wac)
{
if (ObjectUtils.identityToString(wac).equals(wac.getId())) {
if (this.contextId != null) {
wac.setId(this.contextId);
} else {
wac.setId(ConfigurableWebApplicationContext.APPLICATION_CONTEXT_ID_PREFIX +
ObjectUtils.getDisplayString(getServletContext().getContextPath()) + "/" + getServletName());
}
}
wac.setServletContext(getServletContext());
wac.setServletConfig(getServletConfig());
wac.setNamespace(getNamespace());
wac.addApplicationListener(new SourceFilteringListener(wac, new ContextRefreshListener(null)));
ConfigurableEnvironment env = wac.getEnvironment();
if ((env instanceof ConfigurableWebEnvironment)) {
((ConfigurableWebEnvironment)env).initPropertySources(getServletContext(), getServletConfig());
}
postProcessWebApplicationContext(wac);
applyInitializers(wac);
wac.refresh();
}3. HttpServletBean
public final void init()
throws ServletException
{
if (this.logger.isDebugEnabled()) {
this.logger.debug("Initializing servlet '" + getServletName() + "'");
}
try
{
PropertyValues pvs =
new ServletConfigPropertyValues(getServletConfig(), this.requiredProperties);
BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(this);
ResourceLoader resourceLoader = new ServletContextResourceLoader(getServletContext());
bw.registerCustomEditor(Resource.class, new ResourceEditor(resourceLoader, getEnvironment()));
initBeanWrapper(bw);
bw.setPropertyValues(pvs, true);
}
catch (BeansException ex)
{
this.logger.error("Failed to set bean properties on servlet '" + getServletName() + "'", ex);
throw ex;
}
initServletBean();
if (this.logger.isDebugEnabled()) {
this.logger.debug("Servlet '" + getServletName() + "' configured successfully");
}
}