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Upgrading to Play 3.0 #4

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rtyley opened this issue Feb 21, 2024 · 0 comments
Open

Upgrading to Play 3.0 #4

rtyley opened this issue Feb 21, 2024 · 0 comments
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Play Upgrading Playframework

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@rtyley
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rtyley commented Feb 21, 2024 •
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Base assumption: Project is already on Play 2.8 or above

  • A key benefit of Play 3.0 over previous versions of Play is the Akka → Pekko #5 transition, removing the Akka BSL licensing concerns.
  • All the steps in Upgrading to Play 2.9 #1 will need to be completed first, though you may be able to skip straight from Play 2.8 to 3.0. You might want to go via Play 2.9 if the project upgrade is large and you want to break the upgrade process down into smaller chunks, saving the Akka→Pekko transition till last.
  • Note that as the Maven group id of Playframework has changed (com.typesafe.play → org.playframework), there's the potential for scary runtime errors if, for instance, both old and new versions of the play-json library are imported - sbt won't detect the collision, as the artifacts will have different group ids. See, eg, Remove play-json from dependencies mobile-notifications-content#82

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This was referenced Feb 21, 2024
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rtyley added a commit to guardian/facia-scala-client that referenced this issue Feb 28, 2024
@rtyley
Add Play v2.9 support to aid Facia Tool upgrade
34c196b 
Whether you get benefit from going 2.8->2.9->3.0 (over just going 2.8->3.0) is probably a factor
of how big and complicated the project being upgraded is - I'd guess Facia Tool is quite big, so
breaking the changes down into smaller chunks might be worth it in terms of avoiding risk.

Note also that Play 2.9 actually uses Play-Json *2.10*, which is a bit surprising!

See also guardian/maintaining-scala-projects#4
@rtyley rtyley mentioned this issue Feb 28, 2024
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@rtyley rtyley mentioned this issue Mar 12, 2024
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This was referenced Oct 23, 2024
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@rtyley rtyley added the Play Upgrading Playframework label Oct 30, 2024
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