provides functions like async { } and types like Flow. Spring Framework provides support for Coroutines on the following scope: • Deferred and Flow return values support in Spring MVC and WebFlux annotated WebFlux client and server functional API. • WebFlux.fn coRouter { } DSL • Suspending function and Flow support in RSocket @MessageMapping annotated methods 8 • Extensions for RSocketRequester 1.8.1 (with the advantage of being more statically typed) • fun handler(): Flux becomes fun handler(): Flow For input parameters: • If laziness is not needed, fun handler(mono: Mono) becomes fun handler(value:

provides functions like async { } and types like Flow. Spring Framework provides support for Coroutines on the following scope: • Deferred and Flow return values support in Spring MVC and WebFlux annotated WebFlux client and server functional API. • WebFlux.fn coRouter { } DSL • Suspending function and Flow support in RSocket @MessageMapping annotated methods 8 • Extensions for RSocketRequester 1.8.1 (with the advantage of being more statically typed) • fun handler(): Flux becomes fun handler(): Flow For input parameters: • If laziness is not needed, fun handler(mono: Mono) becomes fun handler(value:

access multipart data sequentially, in streaming fashion, you can use @RequestBody with Flux (or Flow in Kotlin) instead, as the following example shows: Java @PostMapping("/") public String handle(@RequestBody { ① // ... } ① Using @RequestBody. Kotlin @PostMapping("/") fun handle(@RequestBody parts: Flow): String { ① // ... } ① Using @RequestBody. @RequestBody Web MVC You can use the @RequestBody Mono account) { // ... } Kotlin @PostMapping("/accounts") fun handle(@RequestBody accounts: Flow) { // ... } You can use the HTTP message codecs option of the WebFlux Config to configure

Static pointcuts Regular expression pointcuts Attribute-driven pointcuts Dynamic pointcuts Control flow pointcuts Pointcut superclasses Custom pointcuts Advice API in Spring Advice lifecycles Advice Client STOMP Over WebSocket Messaging Architecture Overview of STOMP Enable STOMP over WebSocket Flow of Messages Annotation Message Handling Sending Messages Simple Broker Full-Featured Broker Connections Static pointcuts Regular expression pointcuts Attribute-driven pointcuts Dynamic pointcuts Control flow pointcuts Pointcut superclasses Custom pointcuts Advice API in Spring Advice lifecycles Advice

Static pointcuts Regular expression pointcuts Attribute-driven pointcuts Dynamic pointcuts Control flow pointcuts Pointcut superclasses Custom pointcuts Advice API in Spring Advice lifecycles Advice Heartbeats Client disconnects SockJS and CORS SockJsClient STOMP Overview Benefits Enable STOMP Flow of Messages Annotated Controllers @MessageMapping @SubscribeMapping @MessageExceptionHandler Send Static pointcuts Regular expression pointcuts Attribute-driven pointcuts Dynamic pointcuts Control flow pointcuts Pointcut superclasses Custom pointcuts Advice API in Spring Advice lifecycles Advice

Enable STOMP over WebSocket ..................................................................... 637 Flow of Messages ..................................................................................... SpEL expression string as part of a configuration file, for example for Spring bean or Spring Web Flow definitions. In this case, the parser, evaluation context, root object and any predefined variables Advice that executes before a join point, but which does not have the ability to prevent execution flow proceeding to the join point (unless it throws an exception). • After returning advice: Advice to

............................................................................................ 644 Flow of Messages ..................................................................................... Advice that executes before a join point, but which does not have the ability to prevent execution flow proceeding to the join point (unless it throws an exception). • After returning advice: Advice to cannot be cached, as arguments will vary. The main example is the control flow pointcut. Control flow pointcuts Spring control flow pointcuts are conceptually similar to AspectJ cflow pointcuts, although

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 4.4.5. Flow of Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WebSockets, there is usually only one URL for the initial connect. Subsequently, all application messages flow on that same TCP connection. This points to an entirely different asynchronous, event-driven, messaging as a["message1","message2"] (JSON-encoded array), the letter h (“heartbeat” frame) if no messages flow for 25 seconds (by default), and the letter c (“close” frame) to close the session. To learn more

Advice that executes before a join point, but which does not have the ability to prevent execution flow proceeding to the join point (unless it throws an exception). • After returning advice: Advice to cached, as arguments will vary. The main example is the control flow pointcut. 7.2.4.2.1. Control flow pointcuts Spring control flow pointcuts are conceptually similar to AspectJ cflow pointcuts, although control flow pointcut matches the current call stack. For example, it might fire if the join point was invoked by a method in the com.mycompany.web package, or by the SomeCaller class. Control flow pointcuts

Advice that executes before a join point, but which does not have the ability to prevent execution flow proceeding to the join point (unless it throws an exception). • After returning advice: Advice to will vary. The main example is the control flow pointcut. 7.2.4.2.1. Control flow pointcuts Spring AOP APIs Spring Framework (2.5.5) 173 Spring control flow pointcuts are conceptually similar to AspectJ control flow pointcut matches the current call stack. For example, it might fire if the join point was invoked by a method in the com.mycompany.web package, or by the SomeCaller class. Control flow pointcuts