Spring Boot 2.1.0 RC1 Release Notes

Upgrading from Spring Boot 2.1.0 M4

See instructions in the 2.1.0.M4 release notes for upgrading from v2.1.0.M4 and earlier.

OAuth2 client configuration

The structure of the spring.security.oauth2.client.registration has been reworked in a single tree rather than having an authorizationcode and clientcredentials sub namespace.

'all' SLA handling

The description of management.metrics.distribution.sla wrongly described that a all meter ID could be used to set a SLA for all metrics. This feature couldn’t be implemented properly given that the unit may differ based on the meter type.

Thymeleaf Spring Security Extras

Dependency management and auto-configuration for Thymeleaf’s Spring Security Extras module has switched from thymeleaf-extras-springsecurity4 to thymeleaf-extras-springsecurity5. If you were using the module, you should update your pom.xml or build.gradle to depend upon thymeleaf-extras-springsecurity5.

Naryana JTA Support

The Naryana support has been removed in favour of the starter from the Naryana team.

InfluxDB HttpClient customization

Previously, declaring a OkHttpClient.Builder bean was enough to customize the client used by InfluxDB. To make sure such customizations are isolated, please define a InfluxDbOkHttpClientBuilderProvider bean instead.

New and Noteworthy

Tip	Check the configuration changelog for a complete overview of the changes in configuration.

Micrometer

Auto-configuration support for new registries

The following metrics registries are now auto-configured when on the classpath:

AppOptics
Humio
KariosDB

Additionally, support for Prometheus push gateway has been added.

Auto-configuration support for new metrics

The following metrics are now available as core metrics when applicable:

Jetty server thread pool metrics
Server-side Jersey HTTP request metrics

Additional histogram configuration properties

New management.metrics.distribution.maximum-expected-value.* and management.metrics.distribution.minimum-expected-value.* properties can be used to control the maximum and minimum expected values on a per-meter basis.

WebFlux.Fn

http.server.request metrics are now tagged with a uri tag based on the router function’s matching pattern.

Hibernate

Spring Boot now registers a BeanContainer implementation that uses the BeanFactory so that converters and entity listeners can use regular dependency injection.

Reloadable `MessageSource`

Resource bundles can be made reloadable by enabling the spring.messages.reloadable property.

Miscellaneous

Apart from the changes listed above, there have also been lots of minor tweaks and improvements including:

A configuration property, spring.webflux.hiddenmethod.filter.enable, can be used to enable or disable the HiddenHttpMethodFilter when using WebFlux.
Flyway’s configuration can now be customized programatically using a FlywayConfigurationCustomizer bean.
DevTools now sets spring.messages.reloadable to true by default.
When using Neo4J and a Caffeine cache, a BookmarkManager will be auto-configured.
Git and Build info support custom encoding.

Deprecations in Spring Boot 2.1.0 RC1

Customization of InfluxDB’s HTTP client via an OkHttpClient.Builder bean has been deprecated. An InfluxDbOkHttpClientBuilderProvider bean should be used instead.
Properties for configuring Cassandra’s retry, reconnection, and load balancing policies have been deprecated. A ClusterBuilderCustomizer bean should be used instead.