reactive & spring-webflux basic operation

reactive-spring-webflux

• Spring Webflux
  • flux 常用操作
    • map
      • transforming operator n->n synchronously
    • flatmap
      • asynchronously 1 -> 0/n
    • flatMapSequential
      • asynchronously but keeping the original ordering
    • filter
    • reduce
    • concatMap
      • asynchronously
    • transform
      • receive a function and return a flux object
    • concat
      • 合并两个flux对象
    • concatWith
      • 静态方法合并两个flux
    • merge
    • zip
      • 最大操作8个元素，Tuple8
    • zipWith
  • mono 常用操作
    • flatMap
      • asynchronously operator
    • flatMapMany
      • convert Mono object to Flux object
    • concatWith
      • 将两个对象合并成flux对象
    • fromCallable
      • 调用函数
    • zipWith

issues

• when using embed mongodb I got the following erro log

  [org/springframework/boot/autoconfigure/mongo/embedded/EmbeddedMongoAutoConfiguration.class]: Unsatisfied dependency expressed through method 'embeddedMongoServer' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'embeddedMongoConfiguration' defined in class path resource [org/springframework/boot/autoconfigure/mongo/embedded/EmbeddedMongoAutoConfiguration.class]: Bean instantiation via factory method failed; 
  nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [de.flapdoodle.embed.mongo.config.MongodConfig]: Factory method 'embeddedMongoConfiguration' threw exception; nested exception is java.lang.IllegalStateException: Set the spring.mongodb.embedded.version property or define your own MongodConfig bean to use embedded MongoDB```
  

• solved by: adding annotation: @ImportAutoConfiguration(exclude = EmbeddedMongoAutoConfiguration.class)
  or @DataMongoTest(excludeAutoConfiguration = EmbeddedMongoAutoConfiguration.class)

• figure out the difference between spring web and spring reactive web

• 

• route的匹配等级

  • RouterFunctionMapping
  • RequestMappingHandlerMapping

Mono & Flux basic operation
webflux api