add federation 2.6 support, update gateway dependencies

examples/src/main/resources/gateway_v2/gateway.js

@@ -1,6 +1,7 @@
-const {ApolloServer} = require('apollo-server');
-const {ApolloServerPluginInlineTrace} = require('apollo-server-core')
-const {ApolloGateway, IntrospectAndCompose} = require('@apollo/gateway');
+import { ApolloServer } from '@apollo/server';
+import { ApolloServerPluginInlineTrace } from '@apollo/server/plugin/inlineTrace'
+import { ApolloGateway, IntrospectAndCompose } from '@apollo/gateway';
+import {startStandaloneServer} from "@apollo/server/standalone";
 
 const gateway = new ApolloGateway({
   supergraphSdl: new IntrospectAndCompose({
@@ -21,7 +22,9 @@ const gateway = new ApolloGateway({
     ]
   });
 
-  server.listen().then(({url}) => {
-    console.log(`🚀 Server ready at ${url}`)
+  const { url } = await startStandaloneServer(server, {
+    listen: { port: 4000 }
   })
+
+  console.log(`🚀 Server ready at ${url}`)
 })();

examples/src/main/resources/gateway_v2/package.json

@@ -2,15 +2,16 @@
   "name": "federated-gateway",
   "version": "1.0.0",
   "description": "",
+  "type": "module",
   "main": "gateway.js",
   "scripts": {
     "start": "node gateway.js"
   },
   "keywords": [],
   "license": "MIT",
   "dependencies": {
-    "apollo-server": "3.6.7",
-    "@apollo/gateway": "2.0.1",
-    "graphql": "16.3.0"
+    "@apollo/server": "4.9.5",
+    "@apollo/gateway": "2.6.2",
+    "graphql": "16.8.1"
   }
 }

examples/src/main/scala/example/federation/FederatedApp.scala

@@ -1,75 +1,19 @@
 package example.federation
 
+import caliban.quick._
 import example.federation.FederationData.characters.sampleCharacters
 import example.federation.FederationData.episodes.sampleEpisodes
-import caliban.Http4sAdapter
-import caliban.interop.tapir.HttpInterpreter
-import cats.data.Kleisli
-import com.comcast.ip4s._
-import fs2.io.net.Network
-import org.http4s.StaticFile
-import org.http4s.implicits._
-import org.http4s.server.Router
-import org.http4s.ember.server.EmberServerBuilder
-import org.http4s.server.middleware.CORS
 import zio._
-import zio.interop.catz._
 
-object FederatedApp extends CatsApp {
-  import sttp.tapir.json.circe._
+object FederatedApp extends ZIOAppDefault {
 
-  type ExampleTask[A] = RIO[Any, A]
-
-  private implicit val network: Network[ExampleTask] = Network.forAsync
-
-  val service1 =
-    CharacterService
-      .make(sampleCharacters)
-      .memoize
-      .flatMap(layer =>
-        for {
-          interpreter <- FederatedApi.Characters.api.interpreter.map(_.provideLayer(layer))
-          _           <- EmberServerBuilder
-                           .default[ExampleTask]
-                           .withHost(host"localhost")
-                           .withPort(port"8089")
-                           .withHttpApp(
-                             Router[ExampleTask](
-                               "/api/graphql" -> CORS.policy(Http4sAdapter.makeHttpService(HttpInterpreter(interpreter))),
-                               "/graphiql"    -> Kleisli.liftF(StaticFile.fromResource("/graphiql.html", None))
-                             ).orNotFound
-                           )
-                           .build
-                           .toScopedZIO
-          _           <- Console.printLine("Server online at http://localhost:8089/\nPress RETURN to stop...")
-          _           <- Console.readLine
-        } yield ()
-      )
-
-  val service2 =
-    EpisodeService
-      .make(sampleEpisodes)
-      .memoize
-      .flatMap(layer =>
-        for {
-          interpreter <- FederatedApi.Episodes.api.interpreter.map(_.provideLayer(layer))
-          _           <- EmberServerBuilder
-                           .default[ExampleTask]
-                           .withHost(host"localhost")
-                           .withPort(port"8088")
-                           .withHttpApp(
-                             Router[ExampleTask](
-                               "/api/graphql" -> CORS.policy(Http4sAdapter.makeHttpService(HttpInterpreter(interpreter))),
-                               "/graphiql"    -> Kleisli.liftF(StaticFile.fromResource("/graphiql.html", None))
-                             ).orNotFound
-                           )
-                           .build
-                           .toScopedZIO
-          _           <- Console.printLine("Server online at http://localhost:8088/\nPress RETURN to stop...")
-          _           <- Console.readLine
-        } yield ()
-      )
+  val episodesApi   = FederatedApi.Episodes.api.runServer(8089, "/api/graphql", Some("/graphiql"))
+  val charactersApi = FederatedApi.Characters.api.runServer(8088, "/api/graphql", Some("/graphiql"))
 
   override def run =
-    (service1 race service2).exitCode
+    (episodesApi zipPar charactersApi)
+      .provide(
+        EpisodeService.make(sampleEpisodes),
+        CharacterService.make(sampleCharacters)
+      )
 }

examples/src/main/scala/example/federation/v2/FederatedApi.scala

@@ -3,7 +3,7 @@ package example.federation.v2
 import caliban._
 import caliban.federation.EntityResolver
 import caliban.federation.tracing.ApolloFederatedTracing
-import caliban.federation.v2_0.{ federated, GQLKey }
+import caliban.federation.v2_6.{ federated, GQLKey }
 import caliban.schema.Annotations.{ GQLDeprecated, GQLDescription }
 import caliban.schema.{ ArgBuilder, GenericSchema, Schema }
 import caliban.schema.ArgBuilder.auto._

examples/src/main/scala/example/federation/v2/FederationData.scala

@@ -1,6 +1,6 @@
 package example.federation.v2
 
-import caliban.federation.v2_0._
+import caliban.federation.v2_6._
 import zio.query.ZQuery
 
 object FederationData {

federation/src/main/scala/caliban/federation/FederationSupport.scala

@@ -76,11 +76,10 @@ abstract class FederationSupport(
        * @param value a value of type `T`
        */
       override def resolve(value: _Entity): Step[R] =
-        QueryStep(
-          _entityMap
-            .get(value.__typename)
-            .fold[ZQuery[R, CalibanError, Step[R]]](ZQuery.succeed(Step.NullStep))(_.resolve(value.value))
-        )
+        _entityMap
+          .get(value.__typename)
+          .fold[Step[R]](Step.NullStep)(resolver => QueryStep(resolver.resolve(value.value)))
+
     }
 
     case class Query(

federation/src/main/scala/caliban/federation/package.scala

@@ -1,6 +1,12 @@
 package caliban
 
-import caliban.federation.v2x.{ FederationDirectivesV2_3, FederationDirectivesV2_5, FederationV2, Versions }
+import caliban.federation.v2x.{
+  FederationDirectivesV2_3,
+  FederationDirectivesV2_5,
+  FederationDirectivesV2_6,
+  FederationV2,
+  Versions
+}
 
 package object federation {
 
@@ -10,5 +16,6 @@ package object federation {
   lazy val v2_3 = new FederationV2(List(Versions.v2_3)) with FederationDirectivesV2_3
   lazy val v2_4 = new FederationV2(List(Versions.v2_4)) with FederationDirectivesV2_3
   lazy val v2_5 = new FederationV2(List(Versions.v2_5)) with FederationDirectivesV2_5
+  lazy val v2_6 = new FederationV2(List(Versions.v2_6)) with FederationDirectivesV2_6
 
 }

federation/src/main/scala/caliban/federation/v2x/FederationDirectivesV2_6.scala

@@ -0,0 +1,15 @@
+package caliban.federation.v2x
+
+import caliban.InputValue.ListValue
+import caliban.Value.StringValue
+import caliban.parsing.adt.Directive
+import caliban.schema.Annotations.GQLDirective
+
+trait FederationDirectivesV2_6 extends FederationDirectivesV2_5 {
+
+  def Policy(policies: List[List[String]]) =
+    Directive("policy", Map("policies" -> ListValue(policies.map(s => ListValue(s.map(s => StringValue(s)))))))
+
+  case class GQLPolicy(policies: List[List[String]]) extends GQLDirective(Policy(policies))
+
+}

federation/src/main/scala/caliban/federation/v2x/FederationV2.scala

@@ -47,4 +47,9 @@ object FederationV2 {
     `import` = v2_4.`import` :+ Import("@authenticated") :+ Import("@requiresScopes")
   )
 
+  private[v2x] val v2_6 = Link(
+    url = s"$federationV2Url/v2.6",
+    `import` = v2_5.`import` :+ Import("@policy")
+  )
+
 }

federation/src/main/scala/caliban/federation/v2x/Versions.scala

@@ -7,5 +7,6 @@ object Versions {
   val v2_3 = FederationV2.v2_3
   val v2_4 = FederationV2.v2_4
   val v2_5 = FederationV2.v2_5
+  val v2_6 = FederationV2.v2_6
 
 }