Use Java 11

.github/workflows/ci.yaml

@@ -17,7 +17,7 @@ jobs:
           aws-region: eu-west-1
       - uses: actions/setup-java@v3
         with:
-          java-version: "8"
+          java-version: "11"
           distribution: "corretto"
           cache: "sbt"
       - name: Build the stack

.java-version

@@ -1 +1 @@
-1.8.0_332
+11.0.20.8.1

apps/checker/app/model/MatcherError.scala

@@ -7,7 +7,7 @@ case class MatcherError(error: String, id: Option[String] = None) {
 }
 
 object MatcherError {
-  implicit val writes = new Writes[MatcherError] {
+  implicit val writes: Writes[MatcherError] = new Writes[MatcherError] {
     def writes(response: MatcherError) = Json.obj(
       "type" -> response.`type`,
       "id" -> response.id,

apps/checker/app/model/MatcherResponse.scala

@@ -12,7 +12,7 @@ case class MatcherResponse(
 }
 
 object MatcherResponse {
-  implicit val writes = new Writes[MatcherResponse] {
+  implicit val writes: Writes[MatcherResponse] = new Writes[MatcherResponse] {
     def writes(response: MatcherResponse) = Json.obj(
       "type" -> response.`type`,
       "categoryIds" -> response.categoryIds,

apps/checker/app/model/MatcherWorkComplete.scala

@@ -7,7 +7,7 @@ case class MatcherWorkComplete() {
 }
 
 object MatcherWorkComplete {
-  implicit val writes = new Writes[MatcherWorkComplete] {
+  implicit val writes: Writes[MatcherWorkComplete] = new Writes[MatcherWorkComplete] {
     def writes(model: MatcherWorkComplete) = Json.obj(
       "type" -> model.`type`
     )

apps/checker/test/scala/services/MatcherPoolTest.scala

@@ -20,14 +20,13 @@ import org.scalatest.matchers.should.Matchers
 import com.softwaremill.diffx.scalatest.DiffShouldMatcher._
 import com.softwaremill.diffx.generic.auto._
 
-import scala.concurrent.{ExecutionContext, Promise}
+import scala.concurrent.{ExecutionContext, ExecutionContextExecutor, Future, Promise}
 import scala.util.Failure
 import scala.util.Success
 import play.api.libs.concurrent.DefaultFutures
 import utils.Matcher
 
 import scala.concurrent.duration.FiniteDuration
-import scala.concurrent.Future
 
 /** A mock matcher to test the pool implementation. Doesn't complete work until a response is
   * provided, to test queue behaviour.
@@ -85,8 +84,8 @@ class MockMatcherThatThrows(e: Throwable) extends Matcher {
 
 class MatcherPoolTest extends AsyncFlatSpec with Matchers {
   def timeLimit() = 1 second
-  private implicit val ec = ExecutionContext.global
-  private implicit val system = ActorSystem()
+  private implicit val ec: ExecutionContextExecutor = ExecutionContext.global
+  private implicit val system: ActorSystem = ActorSystem()
 
   private def getResponseRule(id: Int) = RegexRule(
     id = "test-rule",

apps/checker/test/scala/utils/TimerTest.scala

@@ -10,7 +10,7 @@ import scala.concurrent.Await
 import scala.concurrent.duration._
 
 class TimerTest extends AnyFlatSpec with Matchers with IdiomaticMockito {
-  implicit val executionContext = ExecutionContext.Implicits.global
+  implicit val executionContext: ExecutionContext = ExecutionContext.Implicits.global
 
   behavior of "time"
 

apps/common-lib/src/main/scala/com/gu/typerighter/model/CheckerRule.scala

@@ -190,7 +190,7 @@ object LTRule {
     ltRule
   }
 
-  implicit val patternWrites = new Writes[Pattern] {
+  implicit val patternWrites: Writes[Pattern] = new Writes[Pattern] {
     def writes(pattern: Pattern) = JsString(pattern.toString)
   }
   implicit val patternReads: Reads[Pattern] = JsPath.read[String].map { regex =>

apps/common-lib/src/main/scala/com/gu/typerighter/model/Suggestion.scala

@@ -26,7 +26,7 @@ sealed trait Suggestion {
 
 object TextSuggestion {
   implicit val reads: Reads[TextSuggestion] = Json.reads[TextSuggestion]
-  implicit val writes = new Writes[TextSuggestion] {
+  implicit val writes: Writes[TextSuggestion] = new Writes[TextSuggestion] {
     def writes(suggestion: TextSuggestion) = Json.obj(
       "type" -> suggestion.`type`
     ) ++ Json.writes[TextSuggestion].writes(suggestion)

apps/common-lib/src/main/scala/com/gu/typerighter/model/TextRange.scala

@@ -1,10 +1,10 @@
 package com.gu.typerighter.model
 
-import play.api.libs.json.Json
+import play.api.libs.json.{Json, OWrites, Reads}
 
 object TextRange {
-  implicit val reads = Json.reads[TextRange]
-  implicit val writes = Json.writes[TextRange]
+  implicit val reads: Reads[TextRange] = Json.reads[TextRange]
+  implicit val writes: OWrites[TextRange] = Json.writes[TextRange]
 }
 
 case class TextRange(from: Int, to: Int) {

apps/rule-manager/app/service/RuleManager.scala

@@ -14,11 +14,11 @@ import db.{DbRuleDraft, DbRuleLive, RuleTagDraft, RuleTagLive}
 import db.DbRuleDraft.autoSession
 import model.{LTRuleCoreForm, LTRuleXMLForm, RegexRuleForm}
 import play.api.data.FormError
-import play.api.libs.json.Json
+import play.api.libs.json.{Json, OWrites}
 import scalikejdbc.DBSession
 
 object AllRuleData {
-  implicit val writes = Json.writes[AllRuleData]
+  implicit val writes: OWrites[AllRuleData] = Json.writes[AllRuleData]
 }
 
 /* All the data associated with a rule, including the current draft rule, the active

apps/rule-manager/test/db/DBTest.scala

@@ -6,7 +6,7 @@ import play.api.db.Databases
 import play.api.db.evolutions.{Evolutions, InconsistentDatabase}
 
 trait DBTest extends BeforeAndAfter { self: Suite =>
-  private implicit val loader = ConfigLoader.stringLoader
+  private implicit val loader: ConfigLoader[String] = ConfigLoader.stringLoader
   private val config = Configuration.load(Environment.simple(), Map.empty)
 
   private val url = config.get("db.default.url")

apps/rule-manager/test/service/RuleTestingSpec.scala

@@ -18,12 +18,12 @@ import play.core.server.Server
 import play.api.test._
 
 import scala.concurrent.duration.DurationInt
-import scala.concurrent.{Await, ExecutionContext, Future}
+import scala.concurrent.{Await, ExecutionContext, ExecutionContextExecutor, Future}
 
 class RuleTestingSpec extends AnyFlatSpec with Matchers with IdiomaticMockito {
   val as: ActorSystem = ActorSystem()
   implicit val materializer: Materializer = Materializer(as)
-  private implicit val ec = ExecutionContext.global
+  private implicit val ec: ExecutionContextExecutor = ExecutionContext.global
 
   /** Mock responses from our CAPI client and checker service when parsing responses.
     *

build.sbt

@@ -3,12 +3,12 @@ import sys.process._
 
 name := "typerighter"
 ThisBuild / organization := "com.gu"
-ThisBuild / scalaVersion := "2.13.7"
+ThisBuild / scalaVersion := "2.13.11"
 ThisBuild / version := "1.0-SNAPSHOT"
 ThisBuild / scalacOptions := Seq(
   "-encoding",
   "UTF-8",
-  "-target:jvm-1.8",
+  "-release:11",
   "-deprecation",
   "-Xfatal-warnings",
   "-Xlint:unused",
@@ -104,7 +104,6 @@ def playProject(label: String, projectName: String, domainPrefix: String, devHtt
         "-J-XX:InitialRAMFraction=2",
         "-J-XX:MaxMetaspaceSize=300m",
         "-J-XX:+PrintGCDetails",
-        "-J-XX:+PrintGCDateStamps",
         s"-J-Dlogs.home=/var/log/${packageName.value}",
         s"-J-Xloggc:/var/log/${packageName.value}/gc.log"
       ),

riff-raff.yaml

@@ -19,10 +19,10 @@ deployments:
       prependStackToCloudFormationStackName: false
       amiParametersToTags:
         AMITyperighterchecker:
-          Recipe: editorial-tools-focal-java8-ngrams-ARM-cdk-base
+          Recipe: editorial-tools-focal-java11-ngrams-ARM-cdk-base
           BuiltBy: amigo
         AMITyperighterrulemanager:
-          Recipe: editorial-tools-focal-java8-ngrams-ARM-cdk-base
+          Recipe: editorial-tools-focal-java11-ARM-WITH-cdk-base
           BuiltBy: amigo
       amiEncrypted: true
       templateStagePaths: