spring-framework.md

Spring Framework

IOC容器

接口

BeanFactory获取bean实例
BeanDefinitionRegistry定义bean,实现此接口的类可以增删改查Bean的定义
BeanDefinition代表一个bean的定义
BeanDefinitionBuilder工具类，用于实例化BeanDefinition
ListableBeanFactory可以查询bean可以认为是BeanDefinitionRegistry的扩充
ApplicationContext只有一些getXX方法
ConfigurableApplicationContext相比ApplicationContext增加了可配置的功能

**注：bean的访问和定义是通过两个接口来描述的，**BeanFactory只定义访问bean实例的方法，BeanDefinitionRegistry描述bean的定义。BeanFactory根据BeanDefinitionRegistry的描述来构建bean实例。通常BeanFactory的实现都会实现BeanDefinitionRegistry

工具类

ClassPathScanningCandidateComponentProvide查找包下面的指定的类
BeanWrapperImpl，实际开发中使用PropertyAccessorFactory#forBeanPropertyAccess来获取实例
DataBinder, bind方法使用BeanWrapper来给java bean的字段赋值，

抽象类

AbstractApplicationContext核心类，spring的初始化逻辑都在这里面，查看这个类可以明白spring的各个功能怎么使用。
AbstractRefreshableApplicationContext，支持多次调用refresh方法

Spring xml定义解析

接口

NamespaceHandler处理各个名字空间,如context,aop,tx等等

扩展Spring

BeanFactoryPostProcessor

实现类：PropertySourcesPlaceholderConfigurer，

BeanPostProcessor

Transaction

接口

PlatformTransactionManager核心接口，用于抽象事务操作，目前有3中实现：DataSourceTransactionManager对应与普通的jdbc，JtaTransactionManager对应jta事务管理，HibernateTransactionManager对应hinernate 的事务管理
TransactionDefinition定义一个事务，包括事务的传播，超时，然后使用PlatformTransactionManager创建
TransactionStatus代表一个事务。

开发模式

xml配置或注解的方式

内部实现是依赖spring的aop，将事物管理横切进目标bean。可以使用注解Transactional来定义事务（隔离，传播，回滚规则）
编程的方式操作事务
1. 使用TransactionTemplate
2. 直接使用PlatformTransactionManager

任务执行和调度

接口

TaskExecutor

继承java的Executor接口，所以用法和java的Executor一样
TaskScheduler定义了调度方法。 1. Trigger：触发器，可以定义task执行的条件，由TaskScheduler使用，可以实现crond功能 2. TriggerContext:保存Trigger的上下文信息

实现

实现类

Spring MVC

SpringServletContainerInitializer

servlet 3.0的接口ServletContainerInitializer，用来支持通过程序来配置servler容器，用来替代web.xml

DispatcherServlet初始化时序图

participant ServletContainer
activate ServletContainer

create DispatcherServlet
ServletContainer -> DispatcherServlet : new
activate DispatcherServlet

    ServletContainer -> DispatcherServlet : HttpServletBean#init()

    create BeanWrapper
    DispatcherServlet-> BeanWrapper : new
    activate BeanWrapper
    note right
        学习BeanWrapper的用法
    end note
    DispatcherServlet-> BeanWrapper : setPropertyValues
    BeanWrapper -> DispatcherServlet: setXXX
    deactivate BeanWrapper

    DispatcherServlet -> DispatcherServlet : FrameworkServlet#initServletBean()
    activate DispatcherServlet
        DispatcherServlet -> DispatcherServlet : FrameworkServlet#initWebApplicationContext
        activate DispatcherServlet
            create WebApplicationContext
            DispatcherServlet -> WebApplicationContext: createWebApplicationContext
            activate WebApplicationContext
            note left
                创建webApplicationContext层级，并且刷新
            end note

            DispatcherServlet -> DispatcherServlet : onRefresh
            activate DispatcherServlet
                DispatcherServlet -> DispatcherServlet : initStrategies
                activate DispatcherServlet
                    DispatcherServlet -> DispatcherServlet : initMultipartResolver
                    DispatcherServlet -> DispatcherServlet : initLocaleResolver
                    DispatcherServlet -> DispatcherServlet : initThemeResolver
                    DispatcherServlet -> DispatcherServlet : initHandlerMappings
                    DispatcherServlet -> DispatcherServlet : initHandlerAdapters
                    DispatcherServlet -> DispatcherServlet : initHandlerExceptionResolvers
                    DispatcherServlet -> DispatcherServlet : initRequestToViewNameTranslator
                    DispatcherServlet -> DispatcherServlet : initViewResolvers
                    DispatcherServlet -> DispatcherServlet : initFlashMapManager
                deactivate DispatcherServlet
                DispatcherServlet -> DispatcherServlet : FrameworkServlet#initFrameworkServlet
            deactivate DispatcherServlet
        deactivate DispatcherServlet
    deactivate DispatcherServlet

DispatcherServlet#initHandlerMappings 流程图

(*) --> 开始
if "detectAllHandlerMappings" then
    -->[true] "搜索ApplicationContext中HandlerMapping的实现类,添加到handlerMappings中"
    -->  " "
else
    -->[false] "添加HANDLER_MAPPING_BEAN_NAME名字的bean到handlerMappings中"
    -->  " "

endif

if "handlerMappings==null" then
    -->[true] "读取DispatcherServlet.properties中配置的默认实现类"
    note left
        DispatcherServlet.properties中配置两个默认实现，
        BeanNameUrlHandlerMapping和RequestMappingHandlerMapping
    end note
endif

--> (*)

RequestMappingHandlerMapping初始化时序图

participant WebApplicationContext
activate WebApplicationContext

participant RequestMappingHandlerMapping
activate RequestMappingHandlerMapping

WebApplicationContext -> RequestMappingHandlerMapping: ApplicationObjectSupport#setApplicationContext
activate RequestMappingHandlerMapping
RequestMappingHandlerMapping -> RequestMappingHandlerMapping: AbstractHandlerMapping#initApplicationContext
activate RequestMappingHandlerMapping
RequestMappingHandlerMapping -> RequestMappingHandlerMapping: AbstractHandlerMapping#extendInterceptors
RequestMappingHandlerMapping -> RequestMappingHandlerMapping: AbstractHandlerMapping#detectMappedInterceptors
RequestMappingHandlerMapping -> RequestMappingHandlerMapping: AbstractHandlerMapping#initInterceptors
deactivate RequestMappingHandlerMapping
deactivate RequestMappingHandlerMapping

RequestMappingHandlerMapping -> RequestMappingHandlerMapping: RequestMappingHandlerMapping#afterPropertiesSet
activate RequestMappingHandlerMapping

create RequestMappingInfo.BuilderConfiguration
RequestMappingHandlerMapping -> RequestMappingInfo.BuilderConfiguration: new
activate  RequestMappingInfo.BuilderConfiguration

RequestMappingHandlerMapping -> RequestMappingInfo.BuilderConfiguration: setUrlPathHelper
RequestMappingHandlerMapping -> RequestMappingInfo.BuilderConfiguration: setPathMatcher
RequestMappingHandlerMapping -> RequestMappingInfo.BuilderConfiguration: setSuffixPatternMatch
RequestMappingHandlerMapping -> RequestMappingInfo.BuilderConfiguration: setTrailingSlashMatch
RequestMappingHandlerMapping -> RequestMappingInfo.BuilderConfiguration: setRegisteredSuffixPatternMatch
RequestMappingHandlerMapping -> RequestMappingInfo.BuilderConfiguration: setContentNegotiationManager

RequestMappingHandlerMapping -> RequestMappingHandlerMapping: AbstractHandlerMethodMapping#afterPropertiesSet
activate RequestMappingHandlerMapping
RequestMappingHandlerMapping -> RequestMappingHandlerMapping: AbstractHandlerMethodMapping#initHandlerMethods
note left
扫描applicationContext或祖先Context中的实体，
end note
deactivate RequestMappingHandlerMapping

deactivate RequestMappingHandlerMapping

DispatcherServlet#initHandlerAdapters

与initHandlerMappings的过程类似，默认的HandlerAdapter是
HttpRequestHandlerAdapter
SimpleControllerHandlerAdapter
RequestMappingHandlerAdapter

RequestMappingHandlerAdapter

初始化

participant WebApplicationContext
activate WebApplicationContext

participant RequestMappingHandlerAdapter
activate RequestMappingHandlerAdapter
[-> RequestMappingHandlerAdapter: 构造函数
WebApplicationContext -> RequestMappingHandlerAdapter: afterPropertiesSet

afterPropertiesSet方法流程图

(*) --> initControllerAdviceCache()

if "this.argumentResolvers == null" then
    --> [true] resolvers = getDefaultArgumentResolvers();
    --> argumentResolvers = new HandlerMethodArgumentResolverComposite().addResolvers(resolvers);
    --> " "
else
    --> [false] " "
endif

if "this.initBinderArgumentResolvers == null" then
    --> [true] resolvers = getDefaultInitBinderArgumentResolvers();
    --> initBinderArgumentResolvers = new HandlerMethodArgumentResolverComposite().addResolvers(resolvers);
    --> "  "
else 
    --> [false] "  "
endif

if "this.returnValueHandlers == null" then
    --> [true] handlers = getDefaultReturnValueHandlers();
    --> returnValueHandlers = new HandlerMethodReturnValueHandlerComposite().addHandlers(handlers);
    --> "   "
else
    --> [false] "   "
endif

--> (*)

DispatcherServlet处理http get请求

participant DispatcherServlet
activate DispatcherServlet

participant HttpServletRequest
activate HttpServletRequest

participant WebApplicationContext
activate WebApplicationContext

participant HandlerExecutionChain
activate HandlerExecutionChain

participant HandlerAdapter
activate HandlerAdapter

[-> DispatcherServlet: doService
activate DispatcherServlet
    DispatcherServlet -> HttpServletRequest: setAttribute(WEB_APPLICATION_CONTEXT_ATTRIBUTE, applicationContext)
    DispatcherServlet -> HttpServletRequest: setAttribute 设置其他属性值
    DispatcherServlet -> DispatcherServlet: doDispatch
    activate DispatcherServlet
        DispatcherServlet -> DispatcherServlet: checkMultipart
        note left
            调用MultipartResolver，并返回MultipartHttpServletRequest
        end note

        DispatcherServlet -> DispatcherServlet: getHandler

        DispatcherServlet -> DispatcherServlet: getHandlerAdapter

        DispatcherServlet -> HandlerExecutionChain: applyPreHandle
        HandlerExecutionChain --> DispatcherServlet: true | false

        DispatcherServlet -> HandlerAdapter: handle
        HandlerAdapter --> DispatcherServlet: ModelAndView mv

        DispatcherServlet -> DispatcherServlet: applyDefaultViewName
        DispatcherServlet -> HandlerExecutionChain: applyPostHandle
        DispatcherServlet -> DispatcherServlet: processDispatchResult
    deactivate DispatcherServlet
deactivate DispatcherServlet

DispatcherServlet#getHandler流程

循环调用handlerMappings中的HandlerMapping#getHandler()方法，直到有HandlerMapping返回非空
对象退出循环，返回HandlerMapping#getHandler()返回的HandlerExecutionChain对象

RequestMappingHandlerMapping类图

AbstractHandlerMapping <|-- AbstractHandlerMethodMapping
AbstractHandlerMethodMapping <|-- RequestMappingInfoHandlerMapping
RequestMappingInfoHandlerMapping <|-- RequestMappingHandlerMapping

abstract class AbstractHandlerMapping {
    +getHandler()
    {abstract} #getHandlerInternal()
}

AbstractHandlerMapping#getHandler流程

(*) --> handler = getHandlerInternal(request)

if "handler==null" then
    --> [true] "handler = getDefaultHandler()"
    if "handler==null" then
        --> [true] (*)
    else
        --> [false] " "
    endif
else
    --> [false] " "
    if "handler instanceof String" then
    note left
        如果是字符串就认为是bean name，需要从applicationContext从取出
    end note
        -->[true] handlerName = (String) handler;
        --> handler = obtainApplicationContext().getBean(handlerName);
        --> "  "
    else
        --> [false] "  "
    endif

    --> executionChain = getHandlerExecutionChain(handler, request);
    --> return executionChain

endif

--> (*)

ModelAndView

包含Object view ，ModelMap model， HttpStatus status三个字段。其中ModelMap直接集成LinkedHashMap保存键值对

RequestMappingHandlerMapping

通过注解RequestMapping创建RequestMappingInfo，RequestMappingHandlerMapping#createRequestMappingInfo

ORM

JPA

使用

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Spring Framework

IOC容器

接口

工具类

抽象类

Spring xml定义解析

接口

扩展Spring

BeanFactoryPostProcessor

BeanPostProcessor

Transaction

接口

开发模式

任务执行和调度

接口

Spring MVC

SpringServletContainerInitializer

DispatcherServlet初始化时序图

DispatcherServlet#initHandlerMappings 流程图

RequestMappingHandlerMapping初始化时序图

DispatcherServlet#initHandlerAdapters

RequestMappingHandlerAdapter

DispatcherServlet处理http get请求

DispatcherServlet#getHandler流程

RequestMappingHandlerMapping类图

AbstractHandlerMapping#getHandler流程

ModelAndView

RequestMappingHandlerMapping

ORM

JPA

FilesExpand file tree

spring-framework.md

Latest commit

History

spring-framework.md

File metadata and controls

Spring Framework

IOC容器

接口

工具类

抽象类

Spring xml定义解析

接口

扩展Spring

BeanFactoryPostProcessor

BeanPostProcessor

Transaction

接口

开发模式

任务执行和调度

接口

Spring MVC

SpringServletContainerInitializer

DispatcherServlet初始化时序图

DispatcherServlet#initHandlerMappings 流程图

RequestMappingHandlerMapping初始化时序图

DispatcherServlet#initHandlerAdapters

RequestMappingHandlerAdapter

DispatcherServlet处理http get请求

DispatcherServlet#getHandler流程

RequestMappingHandlerMapping类图

AbstractHandlerMapping#getHandler流程

ModelAndView

RequestMappingHandlerMapping

ORM

JPA