Tune @ConditionalOnMissingBean for interface-based back off

Previously, a number of usages of @ConditionalOnMissingBean prevented
a bean that implements an auto-configured bean's "main" interface from
causing the auto-configuration of the bean to back off. This would
happen when @ConditionalOnMissingBean did not specify a type, the
@Bean method returned the bean's concrete type, and that concreate
type implements a "main" interface.

This commit updates such usages of @ConditionalOnMissingBean to
specify the "main" interface as the type of the bean that must be
missing. This will allow, for example, the auto-configured
MongoTemplate bean to back off when a MongoOperations bean is defined.

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/RabbitAutoConfiguration.java

@@ -28,6 +28,7 @@ import org.springframework.amqp.rabbit.connection.ConnectionNameStrategy;
 import org.springframework.amqp.rabbit.connection.RabbitConnectionFactoryBean;
 import org.springframework.amqp.rabbit.core.RabbitAdmin;
 import org.springframework.amqp.rabbit.core.RabbitMessagingTemplate;
+import org.springframework.amqp.rabbit.core.RabbitOperations;
 import org.springframework.amqp.rabbit.core.RabbitTemplate;
 import org.springframework.amqp.support.converter.MessageConverter;
 import org.springframework.beans.factory.ObjectProvider;
@@ -151,7 +152,7 @@ public class RabbitAutoConfiguration {
 
 		@Bean
 		@ConditionalOnSingleCandidate(ConnectionFactory.class)
-		@ConditionalOnMissingBean
+		@ConditionalOnMissingBean(RabbitOperations.class)
 		public RabbitTemplate rabbitTemplate(RabbitProperties properties,
 				ObjectProvider<MessageConverter> messageConverter,
 				ObjectProvider<RabbitRetryTemplateCustomizer> retryTemplateCustomizers,

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/cassandra/CassandraDataAutoConfiguration.java

@@ -42,6 +42,7 @@ import org.springframework.data.cassandra.config.CassandraEntityClassScanner;
 import org.springframework.data.cassandra.config.CassandraSessionFactoryBean;
 import org.springframework.data.cassandra.config.SchemaAction;
 import org.springframework.data.cassandra.core.CassandraAdminOperations;
+import org.springframework.data.cassandra.core.CassandraOperations;
 import org.springframework.data.cassandra.core.CassandraTemplate;
 import org.springframework.data.cassandra.core.convert.CassandraConverter;
 import org.springframework.data.cassandra.core.convert.CassandraCustomConversions;
@@ -118,7 +119,7 @@ public class CassandraDataAutoConfiguration {
 	}
 
 	@Bean
-	@ConditionalOnMissingBean
+	@ConditionalOnMissingBean(CassandraOperations.class)
 	public CassandraTemplate cassandraTemplate(Session session, CassandraConverter converter) {
 		return new CassandraTemplate(session, converter);
 	}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/cassandra/CassandraReactiveDataAutoConfiguration.java

@@ -29,6 +29,7 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.data.cassandra.ReactiveSession;
 import org.springframework.data.cassandra.ReactiveSessionFactory;
+import org.springframework.data.cassandra.core.ReactiveCassandraOperations;
 import org.springframework.data.cassandra.core.ReactiveCassandraTemplate;
 import org.springframework.data.cassandra.core.convert.CassandraConverter;
 import org.springframework.data.cassandra.core.cql.session.DefaultBridgedReactiveSession;
@@ -60,7 +61,7 @@ public class CassandraReactiveDataAutoConfiguration {
 	}
 
 	@Bean
-	@ConditionalOnMissingBean
+	@ConditionalOnMissingBean(ReactiveCassandraOperations.class)
 	public ReactiveCassandraTemplate reactiveCassandraTemplate(ReactiveSession reactiveCassandraSession,
 			CassandraConverter converter) {
 		return new ReactiveCassandraTemplate(reactiveCassandraSession, converter);

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/mongo/MongoDbFactoryDependentConfiguration.java

@@ -29,6 +29,7 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.dao.DataAccessException;
 import org.springframework.dao.support.PersistenceExceptionTranslator;
 import org.springframework.data.mongodb.MongoDbFactory;
+import org.springframework.data.mongodb.core.MongoOperations;
 import org.springframework.data.mongodb.core.MongoTemplate;
 import org.springframework.data.mongodb.core.convert.DbRefResolver;
 import org.springframework.data.mongodb.core.convert.DefaultDbRefResolver;
@@ -36,6 +37,7 @@ import org.springframework.data.mongodb.core.convert.MappingMongoConverter;
 import org.springframework.data.mongodb.core.convert.MongoConverter;
 import org.springframework.data.mongodb.core.convert.MongoCustomConversions;
 import org.springframework.data.mongodb.core.mapping.MongoMappingContext;
+import org.springframework.data.mongodb.gridfs.GridFsOperations;
 import org.springframework.data.mongodb.gridfs.GridFsTemplate;
 import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;
@@ -56,7 +58,7 @@ class MongoDbFactoryDependentConfiguration {
 	}
 
 	@Bean
-	@ConditionalOnMissingBean
+	@ConditionalOnMissingBean(MongoOperations.class)
 	MongoTemplate mongoTemplate(MongoDbFactory mongoDbFactory, MongoConverter converter) {
 		return new MongoTemplate(mongoDbFactory, converter);
 	}
@@ -72,7 +74,7 @@ class MongoDbFactoryDependentConfiguration {
 	}
 
 	@Bean
-	@ConditionalOnMissingBean
+	@ConditionalOnMissingBean(GridFsOperations.class)
 	GridFsTemplate gridFsTemplate(MongoDbFactory mongoDbFactory, MongoTemplate mongoTemplate) {
 		return new GridFsTemplate(new GridFsMongoDbFactory(mongoDbFactory, this.properties),
 				mongoTemplate.getConverter());

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/mongo/MongoReactiveDataAutoConfiguration.java

@@ -32,6 +32,7 @@ import org.springframework.context.annotation.Import;
 import org.springframework.core.io.buffer.DataBufferFactory;
 import org.springframework.core.io.buffer.DefaultDataBufferFactory;
 import org.springframework.data.mongodb.ReactiveMongoDatabaseFactory;
+import org.springframework.data.mongodb.core.ReactiveMongoOperations;
 import org.springframework.data.mongodb.core.ReactiveMongoTemplate;
 import org.springframework.data.mongodb.core.SimpleReactiveMongoDatabaseFactory;
 import org.springframework.data.mongodb.core.convert.MappingMongoConverter;
@@ -39,6 +40,7 @@ import org.springframework.data.mongodb.core.convert.MongoConverter;
 import org.springframework.data.mongodb.core.convert.MongoCustomConversions;
 import org.springframework.data.mongodb.core.convert.NoOpDbRefResolver;
 import org.springframework.data.mongodb.core.mapping.MongoMappingContext;
+import org.springframework.data.mongodb.gridfs.ReactiveGridFsOperations;
 import org.springframework.data.mongodb.gridfs.ReactiveGridFsTemplate;
 
 /**
@@ -72,7 +74,7 @@ public class MongoReactiveDataAutoConfiguration {
 	}
 
 	@Bean
-	@ConditionalOnMissingBean
+	@ConditionalOnMissingBean(ReactiveMongoOperations.class)
 	public ReactiveMongoTemplate reactiveMongoTemplate(ReactiveMongoDatabaseFactory reactiveMongoDatabaseFactory,
 			MongoConverter converter) {
 		return new ReactiveMongoTemplate(reactiveMongoDatabaseFactory, converter);
@@ -88,13 +90,13 @@ public class MongoReactiveDataAutoConfiguration {
 	}
 
 	@Bean
-	@ConditionalOnMissingBean
+	@ConditionalOnMissingBean(DataBufferFactory.class)
 	public DefaultDataBufferFactory dataBufferFactory() {
 		return new DefaultDataBufferFactory();
 	}
 
 	@Bean
-	@ConditionalOnMissingBean
+	@ConditionalOnMissingBean(ReactiveGridFsOperations.class)
 	public ReactiveGridFsTemplate reactiveGridFsTemplate(ReactiveMongoDatabaseFactory reactiveMongoDbFactory,
 			MappingMongoConverter mappingMongoConverter, DataBufferFactory dataBufferFactory) {
 		return new ReactiveGridFsTemplate(dataBufferFactory, reactiveMongoDbFactory, mappingMongoConverter, null);

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jms/JmsAutoConfiguration.java

@@ -34,7 +34,9 @@ import org.springframework.boot.context.properties.PropertyMapper;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
+import org.springframework.jms.core.JmsMessageOperations;
 import org.springframework.jms.core.JmsMessagingTemplate;
+import org.springframework.jms.core.JmsOperations;
 import org.springframework.jms.core.JmsTemplate;
 import org.springframework.jms.support.converter.MessageConverter;
 import org.springframework.jms.support.destination.DestinationResolver;
@@ -71,7 +73,7 @@ public class JmsAutoConfiguration {
 		}
 
 		@Bean
-		@ConditionalOnMissingBean
+		@ConditionalOnMissingBean(JmsOperations.class)
 		@ConditionalOnSingleCandidate(ConnectionFactory.class)
 		public JmsTemplate jmsTemplate(ConnectionFactory connectionFactory) {
 			PropertyMapper map = PropertyMapper.get();
@@ -104,7 +106,7 @@ public class JmsAutoConfiguration {
 	protected static class MessagingTemplateConfiguration {
 
 		@Bean
-		@ConditionalOnMissingBean
+		@ConditionalOnMissingBean(JmsMessageOperations.class)
 		@ConditionalOnSingleCandidate(JmsTemplate.class)
 		public JmsMessagingTemplate jmsMessagingTemplate(JmsProperties properties, JmsTemplate jmsTemplate) {
 			JmsMessagingTemplate messagingTemplate = new JmsMessagingTemplate(jmsTemplate);

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jooq/JooqAutoConfiguration.java

@@ -64,7 +64,7 @@ import org.springframework.transaction.PlatformTransactionManager;
 public class JooqAutoConfiguration {
 
 	@Bean
-	@ConditionalOnMissingBean
+	@ConditionalOnMissingBean(ConnectionProvider.class)
 	public DataSourceConnectionProvider dataSourceConnectionProvider(DataSource dataSource) {
 		return new DataSourceConnectionProvider(new TransactionAwareDataSourceProxy(dataSource));
 	}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/mail/MailSenderPropertiesConfiguration.java

@@ -24,6 +24,7 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.mail.MailSender;
+import org.springframework.mail.javamail.JavaMailSender;
 import org.springframework.mail.javamail.JavaMailSenderImpl;
 
 /**
@@ -38,7 +39,7 @@ import org.springframework.mail.javamail.JavaMailSenderImpl;
 class MailSenderPropertiesConfiguration {
 
 	@Bean
-	@ConditionalOnMissingBean
+	@ConditionalOnMissingBean(JavaMailSender.class)
 	JavaMailSenderImpl mailSender(MailProperties properties) {
 		JavaMailSenderImpl sender = new JavaMailSenderImpl();
 		applyProperties(properties, sender);

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/sendgrid/SendGridAutoConfiguration.java

@@ -18,6 +18,7 @@ package org.springframework.boot.autoconfigure.sendgrid;
 
 import com.sendgrid.Client;
 import com.sendgrid.SendGrid;
+import com.sendgrid.SendGridAPI;
 import org.apache.http.HttpHost;
 import org.apache.http.impl.client.HttpClientBuilder;
 
@@ -44,7 +45,7 @@ import org.springframework.context.annotation.Configuration;
 public class SendGridAutoConfiguration {
 
 	@Bean
-	@ConditionalOnMissingBean
+	@ConditionalOnMissingBean(SendGridAPI.class)
 	public SendGrid sendGrid(SendGridProperties properties) {
 		if (properties.isProxyConfigured()) {
 			HttpHost proxy = new HttpHost(properties.getProxy().getHost(), properties.getProxy().getPort());

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/thymeleaf/ThymeleafAutoConfiguration.java

@@ -28,6 +28,7 @@ import org.apache.commons.logging.LogFactory;
 import org.thymeleaf.dialect.IDialect;
 import org.thymeleaf.extras.java8time.dialect.Java8TimeDialect;
 import org.thymeleaf.extras.springsecurity5.dialect.SpringSecurityDialect;
+import org.thymeleaf.spring5.ISpringTemplateEngine;
 import org.thymeleaf.spring5.ISpringWebFluxTemplateEngine;
 import org.thymeleaf.spring5.SpringTemplateEngine;
 import org.thymeleaf.spring5.SpringWebFluxTemplateEngine;
@@ -133,7 +134,7 @@ public class ThymeleafAutoConfiguration {
 	protected static class ThymeleafDefaultConfiguration {
 
 		@Bean
-		@ConditionalOnMissingBean
+		@ConditionalOnMissingBean(ISpringTemplateEngine.class)
 		SpringTemplateEngine templateEngine(ThymeleafProperties properties,
 				ObjectProvider<ITemplateResolver> templateResolvers, ObjectProvider<IDialect> dialects) {
 			SpringTemplateEngine engine = new SpringTemplateEngine();

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/transaction/TransactionAutoConfiguration.java

@@ -35,6 +35,7 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.transaction.PlatformTransactionManager;
 import org.springframework.transaction.annotation.AbstractTransactionManagementConfiguration;
 import org.springframework.transaction.annotation.EnableTransactionManagement;
+import org.springframework.transaction.support.TransactionOperations;
 import org.springframework.transaction.support.TransactionTemplate;
 
 /**
@@ -63,7 +64,7 @@ public class TransactionAutoConfiguration {
 	public static class TransactionTemplateConfiguration {
 
 		@Bean
-		@ConditionalOnMissingBean
+		@ConditionalOnMissingBean(TransactionOperations.class)
 		public TransactionTemplate transactionTemplate(PlatformTransactionManager transactionManager) {
 			return new TransactionTemplate(transactionManager);
 		}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/transaction/jta/AtomikosJtaConfiguration.java

@@ -82,7 +82,7 @@ class AtomikosJtaConfiguration {
 	}
 
 	@Bean(initMethod = "init", destroyMethod = "close")
-	@ConditionalOnMissingBean
+	@ConditionalOnMissingBean(TransactionManager.class)
 	UserTransactionManager atomikosTransactionManager(UserTransactionService userTransactionService) throws Exception {
 		UserTransactionManager manager = new UserTransactionManager();
 		manager.setStartupTransactionService(false);

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/servlet/error/ErrorMvcAutoConfiguration.java

@@ -136,7 +136,7 @@ public class ErrorMvcAutoConfiguration {
 
 		@Bean
 		@ConditionalOnBean(DispatcherServlet.class)
-		@ConditionalOnMissingBean
+		@ConditionalOnMissingBean(ErrorViewResolver.class)
 		DefaultErrorViewResolver conventionErrorViewResolver() {
 			return new DefaultErrorViewResolver(this.applicationContext, this.resourceProperties);
 		}