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Improve TaskExecution documentation with custom Executor and Spring MVC 

Closes gh-15447
This commit is contained in:
Stephane Nicoll 2019-01-07 13:59:42 +01:00
parent 6ad01a6dfc
commit d4992777b9
1 changed files with 14 additions and 1 deletions
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spring-boot-project/spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc
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@ -6359,11 +6359,24 @@ in a similar manner, as shown in the following example:
[[boot-features-task-execution-scheduling]]
== Task Execution and Scheduling
In the absence of a `TaskExecutor` bean in the context, Spring Boot auto-configures a
In the absence of an `Executor` bean in the context, Spring Boot auto-configures a
`ThreadPoolTaskExecutor` with sensible defaults that can be automatically associated to
asynchronous task execution (`@EnableAsync`) and Spring MVC asynchronous request
processing.
[TIP]
====
If you have defined a custom `Executor` in the context, regular task execution (i.e.
`@EnableAsync`) will use it transparently but the Spring MVC support will not be
configured as it requires an `AsyncTaskExecutor` implementation (named
`applicationTaskExecutor`). Depending on your target arrangement, you could change your
`Executor` into a `ThreadPoolTaskExecutor` or define both a `ThreadPoolTaskExecutor` and
an `AsyncConfigurer` wrapping your custom `Executor`.
The auto-configured `TaskExecutorBuilder` allows you to easily create instances that
reproduces what the auto-configuration does by default.
====
The thread pool uses 8 core threads that can grow and shrink according to the load. Those
default settings can be fine-tuned using the `spring.task.execution` namespace as shown in
the following example: