Ignasi Marimon-Clos |

Lagom 1.5.0-M4 released!

We are happy to announce the availability of Lagom 1.5.0-M4. This new milestone towards the releasing of Lagom 1.5.0 continues to improve support for gRPC in Lagom. This release includes Play 2.7.0-M4, Akka 2.5.17 and Akka-HTTP 10.1.5.

Note that ConductR will not be supported for Lagom 1.5.0. Also note that this is an unsupported, pre-release milestone and we don’t guarantee API stability or binary compatibility between milestones.


Updates Play and Akka


Previous milestones of Lagom 1.5.0 started laying the groundwork for integration with Akka gRPC to add it as a transport alternative. In Lagom 1.5.0-M4 we’ve improved the Lagom testkit so you can also test the gRPC of your Lagom application.

In this release, the following are introduced as part of the effort to support gRPC:

  • It is now possible to run the TestServer with SSL enabled and build a gRPC client to interact with the gRPC endpoints offered.
  • Lagom 1.5.0-M3 enabled SSL by default in Lagom’s Dev Mode. In Lagom 1.5.0-M4 we’ve restored the previous behavior where only HTTP is used in Dev Mode and made SSL an Opt-In feature in Dev Mode. Use lagomServiceEnableSsl in ThisBuild := true to start your service with both HTTP and HTTPS ports bound.

Miscellaneous improvements

This release includes a few other small improvements:

  • 1475 handle no body as a valid input contributed by Ido Shamun
  • 1572 which improves Dev Mode’s Service Gateway to stack Host header into X-Forwarded-Host so the target service running behind service Gateway still sees the data sent on the original request.

See GitHub for the full list of commits and the issues and pull requests assigned to the 1.5.0-M4 milestone.

Updating a Lagom project to version 1.5.0-M4

To update an sbt project, change the version of lagom-sbt-plugin in your project/plugins.sbt file.

To update a Maven project, change the lagom.version property in your top-level pom.xml.

After updating, it is recommended to fix any new deprecation warnings you see when compiling or running your services.


Thanks to the community for their detailed bug reports and contributions.

Thanks to Lightbend for their continued sponsorship of the Lagom core team’s efforts. Lightbend offers commercial support for Lagom.

Special thanks to the following contributors who helped with this release:

commits  added  removed  author    
    8     347      94    Ignasi Marimon-Clos
    6     342     242    Dale Wijnand
    4     515      77    Renato Cavalcanti
    2      68      10    Marcos Pereira
    2       2       2    Martijn Riemers
    1       1       1    Ravi Thinakkal
    1     148     146    Kunal sethi
    1     156       2    Ido Shamun