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Add relative ordering to @AutoConfiguration

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The relative ordering is implemented with @AliasFor annotations on the
@AutoConfiguration annotation. The production code already works without
changes, only the test code had to be modified. It now uses
AnnotationMetadata which already knows how to deal with @AliasFor
instead of using the reflection API directly.

See gh-29907
This commit is contained in:
Moritz Halbritter 2022-02-22 13:17:13 +01:00
parent 57cd34be88
commit 9e9049ca7f
4 changed files with 134 additions and 24 deletions
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49
spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/AutoConfiguration.java
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@ -25,8 +25,11 @@ import java.lang.annotation.Target;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.annotation.ImportCandidates;
import org.springframework.context.annotation.AnnotationBeanNameGenerator;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Conditional;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.AliasFor;
import org.springframework.core.io.support.SpringFactoriesLoader;
/**
@ -55,6 +58,52 @@ import org.springframework.core.io.support.SpringFactoriesLoader;
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Configuration(proxyBeanMethods = false)
@AutoConfigureBefore
@AutoConfigureAfter
public @interface AutoConfiguration {
/**
* Explicitly specify the name of the Spring bean definition associated with the
* {@code @AutoConfiguration} class. If left unspecified (the common case), a bean
* name will be automatically generated.
* <p>
* The custom name applies only if the {@code @AutoConfiguration} class is picked up
* via component scanning or supplied directly to an
* {@link AnnotationConfigApplicationContext}. If the {@code @AutoConfiguration} class
* is registered as a traditional XML bean definition, the name/id of the bean element
* will take precedence.
* @return the explicit component name, if any (or empty String otherwise)
* @see AnnotationBeanNameGenerator
*/
@AliasFor(annotation = Configuration.class)
String value() default "";
/**
* The auto-configure classes that should have not yet been applied.
* @return the classes
*/
@AliasFor(annotation = AutoConfigureBefore.class, attribute = "value")
Class<?>[] before() default {};
/**
* The names of the auto-configure classes that should have not yet been applied.
* @return the class names
*/
@AliasFor(annotation = AutoConfigureBefore.class, attribute = "name")
String[] beforeName() default {};
/**
* The auto-configure classes that should have already been applied.
* @return the classes
*/
@AliasFor(annotation = AutoConfigureAfter.class, attribute = "value")
Class<?>[] after() default {};
/**
* The names of the auto-configure classes that should have already been applied.
* @return the class names
*/
@AliasFor(annotation = AutoConfigureAfter.class, attribute = "name")
String[] afterName() default {};
}

2
spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/AutoConfigureAfter.java
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@ -1,5 +1,5 @@
/*
* Copyright 2012-2020 the original author or authors.
* Copyright 2012-2022 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.

2
spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/AutoConfigureBefore.java
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@ -1,5 +1,5 @@
/*
* Copyright 2012-2020 the original author or authors.
* Copyright 2012-2022 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.

105
spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/AutoConfigurationSorterTests.java
View File

@ -1,5 +1,5 @@
/*
* Copyright 2012-2019 the original author or authors.
* Copyright 2012-2022 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -21,6 +21,7 @@ import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
@ -28,6 +29,7 @@ import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.springframework.core.Ordered;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.core.type.classreading.CachingMetadataReaderFactory;
import org.springframework.core.type.classreading.MetadataReader;
import org.springframework.core.type.classreading.MetadataReaderFactory;
@ -43,6 +45,7 @@ import static org.mockito.Mockito.mock;
*
* @author Phillip Webb
* @author Andy Wilkinson
* @author Moritz Halbritter
*/
class AutoConfigurationSorterTests {
@ -54,8 +57,14 @@ class AutoConfigurationSorterTests {
private static final String A = AutoConfigureA.class.getName();
private static final String A2 = AutoConfigureA2.class.getName();
private static final String A3 = AutoConfigureA3.class.getName();
private static final String B = AutoConfigureB.class.getName();
private static final String B2 = AutoConfigureB2.class.getName();
private static final String C = AutoConfigureC.class.getName();
private static final String D = AutoConfigureD.class.getName();
@ -64,15 +73,17 @@ class AutoConfigurationSorterTests {
private static final String W = AutoConfigureW.class.getName();
private static final String W2 = AutoConfigureW2.class.getName();
private static final String X = AutoConfigureX.class.getName();
private static final String Y = AutoConfigureY.class.getName();
private static final String Y2 = AutoConfigureY2.class.getName();
private static final String Z = AutoConfigureZ.class.getName();
private static final String A2 = AutoConfigureA2.class.getName();
private static final String W2 = AutoConfigureW2.class.getName();
private static final String Z2 = AutoConfigureZ2.class.getName();
private AutoConfigurationSorter sorter;
@ -95,12 +106,24 @@ class AutoConfigurationSorterTests {
assertThat(actual).containsExactly(C, B, A);
}
@Test
void byAutoConfigureAfterAliasFor() {
List<String> actual = this.sorter.getInPriorityOrder(Arrays.asList(A3, B2, C));
assertThat(actual).containsExactly(C, B2, A3);
}
@Test
void byAutoConfigureBefore() {
List<String> actual = this.sorter.getInPriorityOrder(Arrays.asList(X, Y, Z));
assertThat(actual).containsExactly(Z, Y, X);
}
@Test
void byAutoConfigureBeforeAliasFor() {
List<String> actual = this.sorter.getInPriorityOrder(Arrays.asList(X, Y2, Z2));
assertThat(actual).containsExactly(Z2, Y2, X);
}
@Test
void byAutoConfigureAfterDoubles() {
List<String> actual = this.sorter.getInPriorityOrder(Arrays.asList(A, B, C, E));
@ -170,29 +193,47 @@ class AutoConfigurationSorterTests {
for (String className : classNames) {
Class<?> type = ClassUtils.forName(className, null);
properties.put(type.getName(), "");
AutoConfigureOrder order = type.getDeclaredAnnotation(AutoConfigureOrder.class);
if (order != null) {
properties.put(className + ".AutoConfigureOrder", String.valueOf(order.value()));
}
AutoConfigureBefore autoConfigureBefore = type.getDeclaredAnnotation(AutoConfigureBefore.class);
if (autoConfigureBefore != null) {
properties.put(className + ".AutoConfigureBefore",
merge(autoConfigureBefore.value(), autoConfigureBefore.name()));
}
AutoConfigureAfter autoConfigureAfter = type.getDeclaredAnnotation(AutoConfigureAfter.class);
if (autoConfigureAfter != null) {
properties.put(className + ".AutoConfigureAfter",
merge(autoConfigureAfter.value(), autoConfigureAfter.name()));
}
AnnotationMetadata annotationMetadata = AnnotationMetadata.introspect(type);
addAutoConfigureOrder(properties, className, annotationMetadata);
addAutoConfigureBefore(properties, className, annotationMetadata);
addAutoConfigureAfter(properties, className, annotationMetadata);
}
return AutoConfigurationMetadataLoader.loadMetadata(properties);
}
private String merge(Class<?>[] value, String[] name) {
Set<String> items = new LinkedHashSet<>();
for (Class<?> type : value) {
items.add(type.getName());
private void addAutoConfigureAfter(Properties properties, String className, AnnotationMetadata annotationMetadata) {
Map<String, Object> autoConfigureAfter = annotationMetadata
.getAnnotationAttributes(AutoConfigureAfter.class.getName(), true);
if (autoConfigureAfter != null) {
properties.put(className + ".AutoConfigureAfter",
merge((String[]) autoConfigureAfter.get("value"), (String[]) autoConfigureAfter.get("name")));
}
}
private void addAutoConfigureBefore(Properties properties, String className,
AnnotationMetadata annotationMetadata) {
Map<String, Object> autoConfigureBefore = annotationMetadata
.getAnnotationAttributes(AutoConfigureBefore.class.getName(), true);
if (autoConfigureBefore != null) {
properties.put(className + ".AutoConfigureBefore",
merge((String[]) autoConfigureBefore.get("value"), (String[]) autoConfigureBefore.get("name")));
}
}
private void addAutoConfigureOrder(Properties properties, String className, AnnotationMetadata annotationMetadata) {
Map<String, Object> autoConfigureOrder = annotationMetadata
.getAnnotationAttributes(AutoConfigureOrder.class.getName());
if (autoConfigureOrder != null) {
Integer order = (Integer) autoConfigureOrder.get("order");
if (order != null) {
properties.put(className + ".AutoConfigureOrder", String.valueOf(order));
}
}
}
private String merge(String[] value, String[] name) {
Set<String> items = new LinkedHashSet<>();
Collections.addAll(items, value);
Collections.addAll(items, name);
return StringUtils.collectionToCommaDelimitedString(items);
}
@ -222,11 +263,21 @@ class AutoConfigurationSorterTests {
}
@AutoConfiguration(after = AutoConfigureB2.class)
static class AutoConfigureA3 {
}
@AutoConfigureAfter({ AutoConfigureC.class, AutoConfigureD.class, AutoConfigureE.class })
static class AutoConfigureB {
}
@AutoConfiguration(after = { AutoConfigureC.class, AutoConfigureD.class, AutoConfigureE.class })
static class AutoConfigureB2 {
}
static class AutoConfigureC {
}
@ -259,11 +310,21 @@ class AutoConfigurationSorterTests {
}
@AutoConfiguration(before = AutoConfigureX.class)
static class AutoConfigureY2 {
}
@AutoConfigureBefore(AutoConfigureY.class)
static class AutoConfigureZ {
}
@AutoConfiguration(before = AutoConfigureY2.class)
static class AutoConfigureZ2 {
}
static class SkipCycleMetadataReaderFactory extends CachingMetadataReaderFactory {
@Override