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11. Upgrading to 2.x

With the new major release version, the Spring Session team took the opportunity to make some non-passive changes. The focus of these changes is to improve and harmonize Spring Session’s APIs, as well as remove the deprecated components.

11.1 Baseline update

Spring Session 2.0 requires Java 8 and Spring Framework 5.0 as a baseline, since its entire codebase is now based on Java 8 source code. Refer to guide for Upgrading to Spring Framework 5.x for reference on upgrading Spring Framework.

11.2 Replaced and Removed Modules

As a part of the project’s split the modules, the existing spring-session has been replaced with spring-session-core module. The spring-session-core module holds only the common set of APIs and components while other modules contain the implementation of appropriate SessionRepository and functionality related to that data store. This applies to several existing that were previously a simple dependency aggregator helper modules but with new module arrangement actually carry the implementation:

  • Spring Session Data Redis
  • Spring Session JDBC
  • Spring Session Hazelcast

Also the following modules were removed from the main project repository:

  • Spring Session Data MongoDB
  • Spring Session Data GemFire

Note that these two have moved to separate repositories, and will continue to be available albeit under a changed artifact names:

11.3 Replaced and Removed Packages, Classes and Methods

  • ExpiringSession API has been merged into Session API
  • Session API has been enhanced to make full use of Java 8
  • Session API has been extended with changeSessionId support
  • SessionRepository API has been updated to better align with Spring Data method naming conventions
  • AbstractSessionEvent and its subclasses are no longer constructable without an underlying Session object
  • Redis namespace used by RedisOperationsSessionRepository is now fully configurable, instead of being partial configurable
  • Redis configuration support has been updated to avoid registering a Spring Session specific RedisTemplate bean
  • JDBC configuration support has been updated to avoid registering a Spring Session specific JdbcTemplate bean
  • Previously deprecated classes and methods have been removed across the codebase

11.4 Dropped Support

As a part of the changes to HttpSessionStrategy and it’s alignment to the counterpart from the reactive world, the support for managing multiple users' sessions in a single browser instance has been removed. The introduction of a new API to replace this functionality is under consideration for future releases.