I am happy to announce the availability of Spring Modulith 1.4 M2, 1.3.3, and 1.2.9. While the latter contain a few bug fixes and the usual dependency upgrades to the latest Spring Boot releases, the milestone release ships a couple of important new features.

• The observability module now automatically creates counters for application events published by modules. A new ModulithEventMetrics API has been introduced and can be used through ModulithEventMetricsCustomizer beans registered in the ApplicationContext (GH-1068).
• The runtime support has been revamped to avoid the dependency on an external library to topologically sort application modules, so that they can be traversed in dependency order (GH-1060). This allows assuming a stable module order in the application metadata file that – previously only created in AOT mode – is now also written when generating documentation (GH-1063). That in turn allows us to avoid the full bootstrap of an ApplicationModules instance at runtime, for example, to execute ApplicationModuleListener beans (GH-1062, GH-1065).
• The event publication infrastructure has been revamped to now also support structurally identical events (GH-1056).

The bugfix releases can be found on Maven Central, the milestone one is available from http://repo.spring.io/milestone. Find more information about the releases in the official change logs for 1.2.9, 1.3.3, and 1.4 M2.