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add Kotlin examples for Spring Data Integration of servlet application

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Talerngpong Virojwutikul 2022-02-14 23:15:27 +07:00 committed by Marcus Da Coregio
parent 606bd120fb
commit 386e8a86a1
1 changed files with 27 additions and 7 deletions
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34
docs/modules/ROOT/pages/servlet/integrations/data.adoc
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@ -2,22 +2,31 @@
= Spring Data Integration
Spring Security provides Spring Data integration that allows referring to the current user within your queries.
It is not only useful but necessary to include the user in the queries to support paged results, since filtering the results afterwards would not scale.
It is not only useful but necessary to include the user in the queries to support paged results since filtering the results afterwards would not scale.
[[data-configuration]]
== Spring Data & Spring Security Configuration
To use this support, add the `org.springframework.security:spring-security-data` dependency and provide a bean of type `SecurityEvaluationContextExtension`.
In Java configuration, this would look like:
To use this support, add `org.springframework.security:spring-security-data` dependency and provide a bean of type `SecurityEvaluationContextExtension`:
====
[source,java]
.Java
[source,java,role="primary"]
----
@Bean
public SecurityEvaluationContextExtension securityEvaluationContextExtension() {
return new SecurityEvaluationContextExtension();
}
----
.Kotlin
[source,kotlin,role="secondary"]
----
@Bean
fun securityEvaluationContextExtension(): SecurityEvaluationContextExtension {
return SecurityEvaluationContextExtension()
}
----
====
In XML Configuration, this would look like:
@ -35,7 +44,8 @@ In XML Configuration, this would look like:
Now you can use Spring Security within your queries:
====
[source,java]
.Java
[source,java,role="primary"]
----
@Repository
public interface MessageRepository extends PagingAndSortingRepository<Message,Long> {
@ -43,8 +53,18 @@ public interface MessageRepository extends PagingAndSortingRepository<Message,Lo
Page<Message> findInbox(Pageable pageable);
}
----
.Kotlin
[source,kotlin,role="secondary"]
----
@Repository
interface MessageRepository : PagingAndSortingRepository<Message,Long> {
@Query("select m from Message m where m.to.id = ?#{ principal?.id }")
fun findInbox(pageable: Pageable): Page<Message>
}
----
====
This checks to see if the `Authentication.getPrincipal().getId()` is equal to the recipient of the `Message`.
Note that this example assumes you have customized the principal to be an `Object` that has an `id` property.
By exposing the `SecurityEvaluationContextExtension` bean, all of the xref:servlet/authorization/expression-based.adoc#common-expressions[Common Security Expressions] are available within the query.
Note that this example assumes you have customized the principal to be an Object that has an id property.
By exposing the `SecurityEvaluationContextExtension` bean, all of the xref:servlet/authorization/expression-based.adoc#common-expressions[Common Security Expressions] are available within the Query.