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Clarify how to configure a Filter's order

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Closes gh-18266
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Andy Wilkinson
2019-11-05 10:02:08 +00:00
parent 69a95ce5c1
commit 1c6f2af475
1 changed files with 4 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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@@ -2676,7 +2676,10 @@ Here are a few examples of Filters and their respective order (lower order value
It is usually safe to leave Filter beans unordered.
If a specific order is required, you should avoid configuring a Filter that reads the request body at `Ordered.HIGHEST_PRECEDENCE`, since it might go against the character encoding configuration of your application.
If a specific order is required, you should annotate the `Filter` with `@Order` or make it implement `Ordered`.
You cannot configure the order of a `Filter` by annotating its bean method with `@Order`.
If you cannot change the `Filter` class to add `@Order` or implement `Ordered`, you must define a `FilterRegistrationBean` for the `Filter` and set the registration bean's order using the `setOrder(int)` method.
Avoid configuring a Filter that reads the request body at `Ordered.HIGHEST_PRECEDENCE`, since it might go against the character encoding configuration of your application.
If a Servlet filter wraps the request, it should be configured with an order that is less than or equal to `OrderedFilter.REQUEST_WRAPPER_FILTER_MAX_ORDER`.
WARNING: Take care when registering `Filter` beans since they are initialized very early in the application lifectyle.