浅谈BeanPostProcessor加载次序及其对Bean造成的影响分析

  @Bean(name="shiroFilter")
  public ShiroFilterFactoryBean shiroFilter(
   @Qualifier("securityManager") SecurityManager manager
   ) {
    ShiroFilterFactoryBean bean=new ShiroFilterFactoryBean();
    bean.setSecurityManager(manager);
    ..............
    return bean;
  }
  //配置核心安全事务管理器
  @Bean(name="securityManager")
  public SecurityManager securityManager(@Qualifier("authRealm") AuthorizingRealm authRealm,
   @Qualifier("sessionManager") SessionManager sessionManager,
   @Qualifier("cookieRememberMeManager") RememberMeManager rememberMeManager,
   @Qualifier("cacheManager") CacheManager cacheManager) {
    System.err.println("--------------shiro已经加载----------------");
    DefaultWebSecurityManager manager=new DefaultWebSecurityManager();
    manager.setRealm(authRealm);
    manager.setSessionManager(sessionManager);
    manager.setRememberMeManager(rememberMeManager);
    manager.setCacheManager(cacheManager);
    return manager;
  }
  //配置自定义权限登录器
  @Bean(name="authRealm")
  public AuthorizingRealm authRealm(IInnerUserService userService) {
   MyRealm myrealm = new MyRealm(IInnerUserService);
   logger.info("authRealm myRealm initiated!");
    return myrealm;
  }
  @Bean
  public LifecycleBeanPostProcessor lifecycleBeanPostProcessor(){
   return new LifecycleBeanPostProcessor(Ordered.LOWEST_PRECEDENCE);
  }

public class MyRealm extends AuthorizingRealm {
 IInnerUserService userService;
 public MyRealm(){
 super();
 }
 public MyRealm(IInnerUserService userService){
 this.userService = userService;
 }
 public IInnerUserService getUserService() {
 return userService;
 }
 public void setUserService(IInnerUserService userService) {
 this.userService = userService;
 }
 @Override
 protected AuthorizationInfo doGetAuthorizationInfo(
  PrincipalCollection principals) {
 //null usernames are invalid
    if (principals == null) {
      throw new AuthorizationException("PrincipalCollection method argument cannot be null.");
    }
    Set<String> roleNames = new HashSet<String>();
    Set<String> permissions = new HashSet<String>();
 User user = (User)getAvailablePrincipal(principals);
 roleNames.add("role1");
 roleNames.add("role2");
 permissions.add("user:create");
 permissions.add("user:update");
 permissions.add("user:delete");
 SimpleAuthorizationInfo info = new SimpleAuthorizationInfo(roleNames);
    info.setStringPermissions(permissions);
    return info;
 }
 
 @Override
 protected AuthenticationInfo doGetAuthenticationInfo(
  AuthenticationToken token) throws AuthenticationException {
 String username = (String)token.getPrincipal(); //得到用户名 
    String password = new String((char[])token.getCredentials()); //得到密码 
    User user = userService.findByUsernameInner(username);
    if(user==null){
     throw new UnknownAccountException();
    }else if(!password.equals(user.getPassword()))
 {
     throw new IncorrectCredentialsException();
 }
    else{
     return new SimpleAuthenticationInfo(user, password, getName());
    }
 }
}

@Service
public class IInnerUserServiceImpl implements IInnerUserService {
 Logger logger = LoggerFactory.getLogger(IInnerUserServiceImpl.class);
 
 @Autowired
 IUserDao userDao;
 
 @Override
 @Cacheable(value = "mycache", key = "#username")
 public User findByUsernameInner(String username) {
 User user = userDao.findByUsername(username);
 logger.info("Real execute find from database, username:{}", username);
 return user;
 }
}

private final List<BeanPostProcessor> beanPostProcessors = new ArrayList<BeanPostProcessor>();

void addBeanPostProcessor(BeanPostProcessor beanPostProcessor);

beanFactory.addBeanPostProcessor(
  new WebApplicationContextServletContextAwareProcessor(this));

beanFactory.addBeanPostProcessor(new ImportAwareBeanPostProcessor(beanFactory));

PostProcessorRegistrationDelegate.registerBeanPostProcessors(beanFactory, this);

 // Separate between BeanPostProcessors that implement PriorityOrdered,
 // Ordered, and the rest.
 List<BeanPostProcessor> priorityOrderedPostProcessors = new ArrayList<BeanPostProcessor>();
 List<BeanPostProcessor> internalPostProcessors = new ArrayList<BeanPostProcessor>();
 List<String> orderedPostProcessorNames = new ArrayList<String>();
 List<String> nonOrderedPostProcessorNames = new ArrayList<String>();
 for (String ppName : postProcessorNames) {
  if (beanFactory.isTypeMatch(ppName, PriorityOrdered.class)) {
  BeanPostProcessor pp = beanFactory.getBean(ppName, BeanPostProcessor.class);
  priorityOrderedPostProcessors.add(pp);
  if (pp instanceof MergedBeanDefinitionPostProcessor) {
   internalPostProcessors.add(pp);
  }
  }
  else if (beanFactory.isTypeMatch(ppName, Ordered.class)) {
  orderedPostProcessorNames.add(ppName);
  }
  else {
  nonOrderedPostProcessorNames.add(ppName);
  }
 }
 
 
 // First, register the BeanPostProcessors that implement PriorityOrdered.
 sortPostProcessors(priorityOrderedPostProcessors, beanFactory);
 registerBeanPostProcessors(beanFactory, priorityOrderedPostProcessors);
 
 
 // Next, register the BeanPostProcessors that implement Ordered.
 List<BeanPostProcessor> orderedPostProcessors = new ArrayList<BeanPostProcessor>();
 for (String ppName : orderedPostProcessorNames) {
  BeanPostProcessor pp = beanFactory.getBean(ppName, BeanPostProcessor.class);
  orderedPostProcessors.add(pp);
  if (pp instanceof MergedBeanDefinitionPostProcessor) {
  internalPostProcessors.add(pp);
  }
 }
 sortPostProcessors(orderedPostProcessors, beanFactory);
 registerBeanPostProcessors(beanFactory, orderedPostProcessors);
 
 
 // Now, register all regular BeanPostProcessors.
 List<BeanPostProcessor> nonOrderedPostProcessors = new ArrayList<BeanPostProcessor>();
 for (String ppName : nonOrderedPostProcessorNames) {
  BeanPostProcessor pp = beanFactory.getBean(ppName, BeanPostProcessor.class);
  nonOrderedPostProcessors.add(pp);
  if (pp instanceof MergedBeanDefinitionPostProcessor) {
  internalPostProcessors.add(pp);
  }
 }
 registerBeanPostProcessors(beanFactory, nonOrderedPostProcessors);
 
 
 // Finally, re-register all internal BeanPostProcessors.
 sortPostProcessors(internalPostProcessors, beanFactory);
 registerBeanPostProcessors(beanFactory, internalPostProcessors);
 
 
 // Re-register post-processor for detecting inner beans as ApplicationListeners,
 // moving it to the end of the processor chain (for picking up proxies etc).
 beanFactory.addBeanPostProcessor(new ApplicationListenerDetector(applicationContext));

 public boolean isTypeMatch(String name, ResolvableType typeToMatch) throws NoSuchBeanDefinitionException{
 .....................
 // Check bean class whether we're dealing with a FactoryBean.
 if (FactoryBean.class.isAssignableFrom(beanType)) { //（1）判断名称对应的Bean是否是一个FactoryBean，若是FactoryBean才执行本句
  if (!BeanFactoryUtils.isFactoryDereference(name)) {
  // If it's a FactoryBean, we want to look at what it creates, not the factory class.
  beanType = getTypeForFactoryBean(beanName, mbd);
  if (beanType == null) {
   return false;
  }
  }
 } 
 .....................
 }

 @Override
 protected Class<?> getTypeForFactoryBean(String beanName, RootBeanDefinition mbd) {
 String factoryBeanName = mbd.getFactoryBeanName();
 String factoryMethodName = mbd.getFactoryMethodName();
 
 
 if (factoryBeanName != null) {
  if (factoryMethodName != null) {
  // Try to obtain the FactoryBean's object type from its factory method declaration
  // without instantiating the containing bean at all.
  BeanDefinition fbDef = getBeanDefinition(factoryBeanName);
  if (fbDef instanceof AbstractBeanDefinition) {
   AbstractBeanDefinition afbDef = (AbstractBeanDefinition) fbDef;
   if (afbDef.hasBeanClass()) {
   Class<?> result = getTypeForFactoryBeanFromMethod(afbDef.getBeanClass(), factoryMethodName);
   if (result != null) {
    return result;
   }
   }
  }
  }
  // If not resolvable above and the referenced factory bean doesn't exist yet,
  // exit here - we don't want to force the creation of another bean just to
  // obtain a FactoryBean's object type...
  if (!isBeanEligibleForMetadataCaching(factoryBeanName)) {  //（2）判断该bean对应的factoryBeanName是否已经初始化了，如果没有，就返回。如果有，则继续
  return null;
  }
 }
 
 
 // Let's obtain a shortcut instance for an early getObjectType() call...
 FactoryBean<?> fb = (mbd.isSingleton() ?
  getSingletonFactoryBeanForTypeCheck(beanName, mbd) :
  getNonSingletonFactoryBeanForTypeCheck(beanName, mbd));
 
 
 ......................
 }

    // If not resolvable above and the referenced factory bean doesn't exist yet,
 // exit here - we don't want to force the creation of another bean just to
 // obtain a FactoryBean's object type...
 if (!isBeanEligibleForMetadataCaching(factoryBeanName)) {
 return null;
 }