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Spring Boot 2.7 Release Notes
Test property sources added by @SpringBootTest using either the properties attribute or the @TestPropertySource annotation are now added above the command line property source. If you are in the unlikely situation of having a @SpringBootTest that uses both properties and args (and with the same property name), you may need to change things around.
Spring Boot 2.7 upgrades to Flyway 8.5 (from 8.0). Since the 8.0 release, Flyway’s support for a number of databases has been extracted into new modules:
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flyway-firebird(Firebird) -
flyway-mysql(MariaDB and MySQL) -
flyway-sqlserver(SQL Server)
If you are using Flyway to manage the schema of one of the above databases, add a dependency on the appropriate new module.
Spring Boot 2.7 has upgraded to H2 2.1.120. H2 2.x is backwards incompatible and fixes a number of security vulnerabilities. See the H2 changelog and migration guide for details of the changes and how to handle the upgrade.
There is no open source version of jOOQ that is compatible with both Java 8 and H2 2.x. If you are using Java 11, consider using the jooq.version property to upgrade to jOOQ 3.16 or later. If you are using Java 8 and cannot upgrade, consider purchasing jOOQ Professional Edition, migrating from H2 to another database or, as a last resort, downgrading to H2 1.4.x.
Spring Boot 2.7 has upgrade the MSSQL driver from v9 to v10. The updated driver now enables encryption by default which may break existing applications. You can read about the change in the "Breaking Changes" section of this article.
The recommended advice is to either install a trusted certificate on your server or update your JDBC connection URL to include encrypt=false.
As OkHttp 3 is no longer being maintained, Spring Boot 2.7 has upgraded to OkHTTP 4.
As part of this upgrade, the property used to control OkHttp’s version has changed from okhttp3.version to okhttp.version.
OkHttp 4 is intended to be backwards compatible with OkHttp 3.
If this is not the case in your application or wish to continue using OkHttp 3 for another reason, configure the okttp.version property in your build.
Separate dependency management for netty-tcnative has been removed in favor of the dependency management provided by Netty’s bom.
This ensures that the version of netty-tcnative will align with the version that Netty uses by default.
As a result of this change, the netty-tcnative.version property can no longer be used to override the version of netty-tcnative.
The version can still be overridden by providing your own dependency management but it is recommended that it remains aligned with Netty’s default version.
Embedded Mongo 3.4 has dropped support for configuring Mongo features.
Reflecting this, the spring.mongodb.embedded.features configuration property has been removed.
For advanced configuration where features were being specified to alter the command line used to launch Mongo, a custom MongodConfig bean should be provided instead.
The following Mustache-related properties that are Servlet-specific have been deprecated:
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spring.mustache.allow-request-override -
spring.mustache.allow-session-override -
spring.mustache.cache -
spring.mustache.content-type -
spring.mustache.expose-request-attributes -
spring.mustache.expose-session-attributes -
spring.mustache.expose-spring-macro-helpers
The following replacements have been introduced:
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spring.mustache.servlet.allow-request-override -
spring.mustache.servlet.allow-session-override -
spring.mustache.servlet.cache -
spring.mustache.servlet.content-type -
spring.mustache.servlet.expose-request-attributes -
spring.mustache.servlet.expose-session-attributes -
spring.mustache.servlet.expose-spring-macro-helpers
The default indices options on the auto-configured ReactiveElasticsearchTemplate have changed to align them with Spring Data Elasticsearch.
Previously, the defaults were strictExpandOpenAndForbidClosed.
They are now strictExpandOpenAndForbidClosedIgnoreThrottled.
To restore the old indices options, define your own reactiveElasticsearchTemplate bean:
@Bean
ReactiveElasticsearchTemplate reactiveElasticsearchTemplate(ReactiveElasticsearchClient client,
ElasticsearchConverter converter) {
ReactiveElasticsearchTemplate template = new ReactiveElasticsearchTemplate(client, converter);
template.setIndicesOptions(IndicesOptions.strictExpandOpenAndForbidClosed());
return template;
}Previously, if spring.data.mongodb.uri was configured alongside any of the equivalent separate properties such as spring.data.mongodb.host and spring.data.mongodb.port an exception would be thrown.
The uri property now takes precedence over any of the separate properties – they’re ignored when spring.data.mongodb.uri is set.
This aligns the behavior with other similar properties such as spring.redis.url.
The spring-boot:run and spring-boot:start goals of the Maven Plugin run your application in a forked processed by default.
It is possible to disable this behavior using the fork attribute of the plugin.
This attribute is now deprecated with no replacement.
ExitCodeGenerators are now ordered based on their Ordered implementation and @Order annotation.
The first non-zero exit code that is generated is used.
Metric tag keys that were in camelCase have been renamed to comply with Micrometer’s recommendation to use all lower-case and a . separator.
The following metrics and tag keys are affected:
| Metric | Old Tag Key | New Tag Key |
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If you need to restore the previous names, define a MeterFilter bean that implements the map(Id) method to modify the tag keys.
Elasticsearch has deprecated its RestHighLevelClient.
In alignment with this, Spring Boot’s auto-configuration for RestHighLevelClient has been deprecated.
Where possible, the auto-configured low-level RestClient should be used instead.
Alternatively, consider manually configuring the new client.
In the Borca release, the group ID of r2dbc-postgresql, the driver for PostgreSQL, has changed from io.r2dbc to org.postgresql. r2dbc-mysql, the driver for MySQL, as been removed. Consider using r2dbc-mariadb as a replacement.
Spring Boot 2.7 upgrades to Spring Security 5.7 which has deprecated WebSecurityConfigurerAdapter. When configuring Spring Security without WebSecurityConfigurerAdapter and using Spring Boot’s sliced tests such as @WebMvcTest, you may need to make some changes to your application to make your SecurityFilterChain beans available to your tests by @Import ing your security configuration class. See the reference documentation for further details.
Spring Boot 2.7 has changed the way that auto-configuration and management context classes are discovered.
They are now declared in files named META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports and
META-INF/spring/org.springframework.boot.actuate.autoconfigure.web.ManagementContextConfiguration.imports respectively.
If you are using the maven-shade-plugin and are not depending on spring-boot-starter-parent, add the following AppendingTransformer configuration:
<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
<resource>META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports</resource>
</transformer>
<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
<resource>META-INF/spring/org.springframework.boot.actuate.autoconfigure.web.ManagementContextConfiguration.imports</resource>
</transformer>Add the following configuration to append the .imports files:
tasks.withType(ShadowJar).configureEach {
append("META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports")
append("META-INF/spring/org.springframework.boot.actuate.autoconfigure.web.ManagementContextConfiguration.imports")
}Dependency management for org.jvnet.mimepull:mimepull has been removed.
If you have declared a dependency on mimepull, add a version that meets your needs to that declaration.
Hazelcast 3 support is deprecated.
If you still need to downgrade to Hazelcast 3, hazelcast-client should be added to the classpath to configure a client.
Since Spring Framework 5.1, Spring MVC has supported multiple RequestMappingHandlerMapping beans.
To align with this, Spring Boot 2.7 no longer defines MVC’s main requestMappingHandlerMapping bean as @Primary.
In the unlikely event that you were injecting RequestMappingHandlerMapping, if there are multiple such beans in the context you will now need to use @Qualifier to select the candidate that you wish to be injected.
Alternatively, all candidates can be injected using List<RequestMappingHandlerMapping>.
The coordinates of the MySQL JDBC driver have changed. 8.0.31 is published to com.mysql:mysql-connector-j in addition to mysql:mysql-connector-java. In 8.0.32 and later it is only published to com.mysql:mysql-connector-j. Spring Boot 2.7.8 upgraded to 8.0.32. If you are using the MySQL JDBC driver, update its coordinates accordingly when upgrading to Spring Boot 2.7.8 and later.
Classes, methods and properties that were deprecated in Spring Boot 2.5 have been removed in this release. Please ensure that you aren’t calling deprecated methods before upgrading.
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Tip
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Check the configuration changelog for a complete overview of the changes in configuration. |
Spring Boot 2.7 ships support for the Spring GraphQL project with a new spring-boot-starter-graphql starter. You’ll find more information in the GraphQL section of the Spring Boot reference documentation.
A RabbitStreamTemplate is auto-configured if a stream name is set using the spring.rabbitmq.stream.name property.
A RabbitStreamTemplateConfigurer is provided, similar to RabbitTemplateConfigurer to customize additional instances whilst retaining auto-configuration.
The auto-configured Hazelcast embedded server now uses SpringManagerContext by default.
This makes it possible to inject Spring managed beans into objects instantiated by Hazelcast.
A HazelcastConfigCustomizer callback interface has also been introduced and can be used to further tune the Hazelcast server config.
An OsInfoContributor can expose some information about the Operating System the application is running on:
{
"os": {
"name": "Linux",
"version": "5.4.0-1051-gke",
"arch": "amd64"
}
}This new contributor is disabled by default.
It can be enabled using the management.info.os.enabled property.
The existing JavaInfoContributor has been improved to offer a dedicated section for the vendor information, including the vendor-specific version.
Rather than a top-level vendor simple attribute, it is now a dedicated object with name and version attributes:
{
"java": {
"vendor": {
"name": "Eclipse Adoptium",
"version": "Temurin-17.0.1+12"
},
"..."
}Note that not all vendors expose a java.vendor.version system property so the version attribute may be null.
An RSocket handler method can now inject the @Authenticated Principal:
@MessageMapping ("test")
Mono<String> hello (@Authenticated Principal p){
return Mono.just ("Hello, " + p.getName()) ;
}If you are using opaque token introspection in your OAuth2 resource server, the auto-configured introspector no longer requires a dependency on com.nimbusds:oauth2-oidc-sdk.
Depending on other usages of the SDK, you may be able to remove the dependency from your application.
A new @DataCouchbaseTest annotation for testing applications that use Spring Data Couchbase has been introduced. See the updated reference documentation for details.
A new @DataElasticsearchTest annotation for testing applications that use Spring Data Elasticsearch has been introduced. See the updated reference documentation for details.
If you use Spring Security’s SAML2 support, you can configure RP-initiated or AP-initiated logout via configuration properties. See the updated reference documentation for details.
If you have created your own auto-configurations, you should move the registration from spring.factories under the org.springframework.boot.autoconfigure.EnableAutoConfiguration key to a new file named META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports. Rather than a single comma-separate list, each line contains the fully qualified name of an auto-configuration class. See the included auto-configurations for an example.
For backwards compatibility, entries in spring.factories will still be honored.
Furthermore, entries can be listed in both files and will be de-duplicated.
This allows a library to target versions of Spring Boot that only support spring.factories and versions of Spring Boot that only support AutoConfiguration.imports.
A new @AutoConfiguration annotation has been introduced. It should be used to annotate top-level auto-configuration classes that are listed in the new META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports file, replacing @Configuration. Configuration classes that are nested within or imported by an @AutoConfiguration class should continue to use @Configuration as before.
For your convenience, @AutoConfiguration also supports auto-configuration ordering via the after, afterNames, before and beforeNames attributes. This can be used as a replacement for @AutoConfigureAfter and @AutoConfigureBefore.
If you have created your own test-slices, you should move the registration from spring.factories to the new place under META-INF/spring/<name of your test slice annotation>.imports. The format is the same as the new file described in the "Auto-configuration Registration" section, see above.
FailureAnalyzer implementations can now get access to the BeanFactory and Environment of the current application context by providing a constructor that takes one or both of these values as a parameter. Support for injecting the BeanFactory by implementing BeanFactoryAware and injecting the Environment by implementing EnvironmentAware in a FailureAnalyzer is deprecated and will be removed in a future release.
Support for specifying a username for authenticating to Sentinel(s) has been added using the spring.redis.sentinel.username property.
SanitizingFunction beans are now called in order, stopping once a function has changed the value of the SanitizableData.
If no SanitizingFunction bean sanitizes the value, the built-in key-based sanitization is performed.
Functions are ordered through their @Order annotations or their Ordered implementation.
Dependency management and auto-configuration for Cache2k has been added.
Default cache settings can be customized by defining a Cache2kBuilderCustomizer bean.
Auto-configuration for Jackson will now scan your application’s packages for classes annotated with @JsonMixin.
Any class that are found are automatically registered as mixins with the auto-configured ObjectMapper.
Embedded web servers can be configured to use SSL with PEM-encoded certificate and private key files using the properties server.ssl.certificate and server.ssl.certificate-private-key, as well as the optional server.ssl.trust-certificate and server.ssl.trust-certificate-private-key. Management endpoints can be secured using similar management.server.ssl.* properties.
See the documentation for an example.
This is provided as an alternative to configuring SSL with Java KeyStore files.
Spring Boot 2.7 moves to new versions of several Spring projects:
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Spring Session 2021.2
Numerous third-party dependencies have also been updated, some of the more noteworthy of which are the following:
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Elasticsearch 7.17
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Flyway 8.5
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H2 2.1
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Json 2.9
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Json Path 2.7
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Kafka 3.1
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MariaDB 3.0
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MongoDB 4.5
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OkHTTP 4.9
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REST Assured 4.5
Apart from the changes listed above, there have also been lots of minor tweaks and improvements including:
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Kafka
idlePartitionEventIntervalcan be configured using thespring.kafka.listener.idle-partition-event-intervalproperty. -
KafkaTemplatetransactionIdPrefixproperty can be configured using thespring.kafka.template.transaction-id-prefixproperty. -
Netty
maxKeepAliveRequestscan be configured using theserver.netty.max-keep-alive-requestsproperty. -
@DataJdbcTestautomatically scans forAbstractJdbcConfigurationbeans. -
A
UserDetailsServicebean is no longer auto-configured when SAML 2.0 Login is being used. -
The transaction isolation level of Spring Batch can be configured using the
spring.batch.jdbc.isolation-level-for-createproperty. -
The filter used to record Spring MVC metrics can now be replaced by defining your own
FilterRegistrationBean<WebMvcMetricsFilter>bean. -
The ID of
DatabaseDriver.MARIADBhas changed frommysqltomariadb -
The
InputStreamreturned byRandomAccessDataFileinspring-boot-loadernow implementsavailable(). -
Spring Kafka’s
immediateStopis configurable using thespring.kafka.listener.immediate-stopproperty. -
A new property,
spring.mustache.reactive.media-types, can be used to configure the media types supported by a reactive Mustache view. -
Elasticsearch
RestClientBuilderandRestClientbeans are now auto-configured whenelasticsearch-rest-clientis on the classpath. Ifelasticsearch-rest-high-level-clientis on the classpath, aRestHighLevelClientbean will still be auto-configured as before, but note that support forRestHighLevelClientis now deprecated.
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Loading auto-configurations from
spring.factoriesis deprecated. See above for more details. -
DatabaseDriver.GAE -
Properties under
spring.security.saml2.relyingparty.registration.{id}.identityproviderhave been moved tospring.security.saml2.relyingparty.registration.{id}.assertingparty. Using the old property names result in log messages on WARN level on startup.