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Fix subsection style in WebFlux Concurrency Model 

The block title style previously used was not rendered in HTML and the
title couldn't be differentiated from the text. Though, it was in the
PDF, as italics.

Introducing delimited blocks in the open (`--`) style did introduce
styling, but the vertical alignment isn't great.

This commit turns these block titles to actual (deep) section titles.
In the final HTML, at this depth there is no numbering but bold styling
is there. The PDF rendering has also been verified to have relevant
style.

Closes gh-29694
This commit is contained in:
Simon Baslé 2022-12-15 15:47:57 +01:00 committed by Sam Brannen
parent a3a94950f6
commit fbd4463f20
1 changed files with 7 additions and 4 deletions
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11
framework-docs/src/docs/asciidoc/web/webflux.adoc
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@ -248,20 +248,22 @@ current thread (and rely on callbacks instead) means that you do not need extra
there are no blocking calls to absorb.
==== Invoking a Blocking API
.Invoking a Blocking API
What if you do need to use a blocking library? Both Reactor and RxJava provide the
`publishOn` operator to continue processing on a different thread. That means there is an
easy escape hatch. Keep in mind, however, that blocking APIs are not a good fit for
this concurrency model.
.Mutable State
==== Mutable State
In Reactor and RxJava, you declare logic through operators. At runtime, a reactive
pipeline is formed where data is processed sequentially, in distinct stages. A key benefit
of this is that it frees applications from having to protect mutable state because
application code within that pipeline is never invoked concurrently.
.Threading Model
==== Threading Model
What threads should you expect to see on a server running with Spring WebFlux?
* On a "`vanilla`" Spring WebFlux server (for example, no data access nor other optional
@ -285,7 +287,8 @@ specific thread pool `Scheduler` strategy.
* Data access libraries and other third party dependencies can also create and use threads
of their own.
.Configuring
==== Configuring
The Spring Framework does not provide support for starting and stopping
<<webflux-server-choice, servers>>. To configure the threading model for a server,
you need to use server-specific configuration APIs, or, if you use Spring Boot,