Splitting design into separate services

.gitignore

@@ -11,7 +11,10 @@
 
 # Test binary, built with `go test -c`
 *.test
-gen
+bin
+**/cmd
+**/gen
+api-cli
 
 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out

design/design.go

@@ -4,20 +4,7 @@ import (
 	. "goa.design/goa/v3/dsl"
 )
 
-var _ = API("api", func() {
+var Item = Type("item", func() {
-	Title("API Service")
-	Description("An HTTP/JSON front service which provides an API to manipulate the characters, their inventories, and the items that exist")
-    Server("api", func() {
-        Host("localhost", func() {
-            URI("http://localhost:8000")
-            URI("grpc://localhost:8080")
-        })
-    })
-})
-
-var empty = Type("empty")
-
-var item = Type("item", func() {
 	Field(1, "id", Int)
 	Field(2, "name", String)
 	Field(3, "description", String)
@@ -26,228 +13,10 @@ var item = Type("item", func() {
 	Required("name", "description", "multiplier", "type")
 })
 
-var character = Type("character", func() {
+var Character = Type("character", func() {
 	Field(1, "id", Int)
 	Field(2, "name", String)
 	Field(3, "description", String)
 	Field(4, "class", String)
 	Required("name", "description", "class")
 })
-
-var _ = Service("item", func() {
-	Description("A GRPC back service that handles CRUD operations for the items that exist and their attributes")
-
-	Method("getItem", func() {
-		Payload(Int)
-		Result(item)
-		Error("NotFound")
-
-		HTTP(func() {
-			GET("/item/{id}")
-			Response(StatusOK)
-			Response(StatusBadRequest)
-			Response(StatusNotFound)
-		})
-
-		GRPC(func() {
-			Response(CodeOK)
-		})
-	})
-
-	// Method("listItems", func() {
-	// })
-
-	Method("createItem", func() {
-		Payload(item)
-		Result(item)
-		Error("BadRequest")
-
-		HTTP(func() {
-			POST("/item")
-			Body(item)
-			Response(StatusOK)
-			Response(StatusBadRequest)
-		})
-
-		GRPC(func() {
-			Response(CodeOK)
-		})
-	})
-
-	Method("updateItem", func() {
-		Payload(item)
-		Result(item)
-		Error("NotFound")
-		Error("BadRequest")
-
-		HTTP(func() {
-			PUT("/item/{id}")
-			Body(item)
-			Response(StatusOK)
-			Response(StatusBadRequest)
-			Response(StatusNotFound)
-		})
-
-		GRPC(func() {
-			Response(CodeOK)
-		})
-	})
-
-	Method("deleteItem", func() {
-		Payload(Int)
-		Result(empty)
-		Error("NotFound")
-		Error("BadRequest")
-
-		HTTP(func() {
-			POST("/item/{id}")
-			Response(StatusOK)
-			Response(StatusBadRequest)
-			Response(StatusNotFound)
-		})
-
-		GRPC(func() {
-			Response(CodeOK)
-			Response("NotFound", CodeNotFound)
-			Response("BadRequest", CodeInvalidArgument)
-		})
-	})
-
-	Files("/openapi.json", "./gen/http/openapi.json")
-})
-
-var _ = Service("character", func() {
-	Description("A GRPC back service that handles CRUD operations for the characters and their attributes")
-
-	Method("getCharacter", func() {
-		Payload(Int)
-		Result(character)
-		Error("NotFound")
-		Error("BadRequest")
-
-		HTTP(func() {
-			GET("/character/{id}")
-			Response(StatusOK)
-			Response(StatusBadRequest)
-			Response(StatusNotFound)
-		})
-
-		GRPC(func() {
-			Response(CodeOK)
-			Response("NotFound", CodeNotFound)
-			Response("BadRequest", CodeInvalidArgument)
-		})
-	})
-
-	// Method("listCharacters", func() {
-	// })
-
-	Method("createCharacter", func() {
-		Payload(character)
-		Result(character)
-		Error("BadRequest")
-		Error("NotFound")
-
-		HTTP(func() {
-			POST("/character")
-			Body(character)
-			Response(StatusBadRequest)
-			Response(StatusOK)
-			Response(StatusInternalServerError)
-		})
-
-		GRPC(func() {
-			Response(CodeOK)
-			Response("NotFound", CodeNotFound)
-			Response("BadRequest", CodeInvalidArgument)
-		})
-	})
-
-	Method("updateCharacter", func() {
-		Payload(character)
-		Result(character)
-		Error("NotFound")
-		Error("BadRequest")
-
-		HTTP(func() {
-			PUT("/character/{id}")
-			Body(character)
-			Response(StatusOK)
-			Response(StatusBadRequest)
-			Response(StatusNotFound)
-		})
-
-		GRPC(func() {
-			Response(CodeOK)
-			Response("NotFound", CodeNotFound)
-			Response("BadRequest", CodeInvalidArgument)
-		})
-	})
-
-	Method("deleteCharacter", func() {
-		Payload(Int)
-		Result(empty)
-		Error("NotFound")
-		Error("BadRequest")
-
-		HTTP(func() {
-			POST("/character/{id}")
-			Response(StatusOK)
-			Response(StatusBadRequest)
-			Response(StatusNotFound)
-		})
-
-		GRPC(func() {
-			Response(CodeOK)
-			Response("NotFound", CodeNotFound)
-			Response("BadRequest", CodeInvalidArgument)
-		})
-	})
-
-	Files("/openapi.json", "./gen/http/openapi.json")
-})
-
-var _ = Service("inventory", func() {
-	Description("A GRPC back service that handles CRUD operations for the characters’ inventories")
-
-	// Method("listItems", func() {
-	// })
-
-	Method("addItem", func() {
-		Payload(Int)
-		Result(empty)
-		Error("NotFound")
-		Error("BadRequest")
-
-		HTTP(func() {
-			POST("/inventory/{characterId}")
-			Response(StatusOK)
-			Response(StatusBadRequest)
-		})
-
-		GRPC(func() {
-			Response(CodeOK)
-		})
-	})
-
-	Method("removeItem", func() {
-		Payload(Int)
-		Result(empty)
-		Error("NotFound")
-		Error("BadRequest")
-
-		HTTP(func() {
-			PUT("/inventory/{characterId}")
-			Response(StatusOK)
-			Response(StatusBadRequest)
-		})
-
-		GRPC(func() {
-			Response(CodeOK)
-			Response("NotFound", CodeNotFound)
-			Response("BadRequest", CodeInvalidArgument)
-		})
-	})
-
-	Files("/openapi.json", "./gen/http/openapi.json")
-})

go.mod

@@ -2,17 +2,27 @@ module crossnokaye-interview-assignment
 
 go 1.20
 
-require goa.design/goa/v3 v3.12.3
+require (
+	goa.design/goa/v3 v3.12.3
+	google.golang.org/grpc v1.56.2
+	google.golang.org/protobuf v1.31.0
+)
 
 require (
 	github.com/dimfeld/httppath v0.0.0-20170720192232-ee938bf73598 // indirect
+	github.com/dimfeld/httptreemux/v5 v5.5.0 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/google/uuid v1.3.0 // indirect
+	github.com/gorilla/websocket v1.5.0 // indirect
 	github.com/manveru/faker v0.0.0-20171103152722-9fbc68a78c4d // indirect
 	github.com/sergi/go-diff v1.3.1 // indirect
 	github.com/zach-klippenstein/goregen v0.0.0-20160303162051-795b5e3961ea // indirect
 	golang.org/x/mod v0.12.0 // indirect
+	golang.org/x/net v0.12.0 // indirect
 	golang.org/x/sys v0.10.0 // indirect
 	golang.org/x/text v0.11.0 // indirect
 	golang.org/x/tools v0.11.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230629202037-9506855d4529 // indirect
+	google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.3.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -2,8 +2,16 @@ github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dimfeld/httppath v0.0.0-20170720192232-ee938bf73598 h1:MGKhKyiYrvMDZsmLR/+RGffQSXwEkXgfLSA08qDn9AI=
 github.com/dimfeld/httppath v0.0.0-20170720192232-ee938bf73598/go.mod h1:0FpDmbrt36utu8jEmeU05dPC9AB5tsLYVVi+ZHfyuwI=
+github.com/dimfeld/httptreemux/v5 v5.5.0 h1:p8jkiMrCuZ0CmhwYLcbNbl7DDo21fozhKHQ2PccwOFQ=
+github.com/dimfeld/httptreemux/v5 v5.5.0/go.mod h1:QeEylH57C0v3VO0tkKraVz9oD3Uu93CKPnTLbsidvSw=
+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
+github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/gorilla/websocket v1.5.0 h1:PPwGk2jz7EePpoHN/+ClbZu8SPxiqlu12wZP/3sWmnc=
+github.com/gorilla/websocket v1.5.0/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
@@ -20,12 +28,25 @@ goa.design/goa/v3 v3.12.3 h1:LHQDUp7t67Ml8pyQc1ywSa14eQ3JaTUBESMgOKF19bI=
 goa.design/goa/v3 v3.12.3/go.mod h1:y78cWNxip293j/ut0fvu8FH+s61ojHKyLbTQumk+BB4=
 golang.org/x/mod v0.12.0 h1:rmsUpXtvNzj340zd98LZ4KntptpfRHwpFOHG188oHXc=
 golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/net v0.12.0 h1:cfawfvKITfUsFCeJIHJrbSxpeu/E81khclypR0GVT50=
+golang.org/x/net v0.12.0/go.mod h1:zEVYFnQC7m/vmpQFELhcD1EWkZlX69l4oqgmer6hfKA=
 golang.org/x/sys v0.10.0 h1:SqMFp9UcQJZa+pmYuAKjd9xq1f0j5rLcDIk0mj4qAsA=
 golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/text v0.11.0 h1:LAntKIrcmeSKERyiOh0XMV39LXS8IE9UL2yP7+f5ij4=
 golang.org/x/text v0.11.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
 golang.org/x/tools v0.11.0 h1:EMCa6U9S2LtZXLAMoWiR/R8dAQFRqbAitmbJ2UKhoi8=
 golang.org/x/tools v0.11.0/go.mod h1:anzJrxPjNtfgiYQYirP2CPGzGLxrH2u2QBhn6Bf3qY8=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20230629202037-9506855d4529 h1:DEH99RbiLZhMxrpEJCZ0A+wdTe0EOgou/poSLx9vWf4=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20230629202037-9506855d4529/go.mod h1:66JfowdXAEgad5O9NnYcsNPLCPZJD++2L9X0PCMODrA=
+google.golang.org/grpc v1.56.2 h1:fVRFRnXvU+x6C4IlHZewvJOVHoOv1TUuQyoRsYnB4bI=
+google.golang.org/grpc v1.56.2/go.mod h1:I9bI3vqKfayGqPUAwGdOSu7kt6oIJLixfffKrpXqQ9s=
+google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.3.0 h1:rNBFJjBCOgVr9pWD7rs/knKL4FRTKgpZmsRfV214zcA=
+google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.3.0/go.mod h1:Dk1tviKTvMCz5tvh7t+fh94dhmQVHuCt2OzJB3CTW9Y=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
+google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

scripts/build

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+set -e
+
+GIT_ROOT=$(git rev-parse --show-toplevel)
+GIT_COMMIT=$(git rev-list -1 HEAD)
+pushd ${GIT_ROOT}
+
+echo "Rebuilding services..."
+
+mkdir -p bin
+
+for svc in front character item inventory; do
+  go build -o bin/${svc} crossnokaye-interview-assignment/services/${svc}/cmd/${svc}
+done
+
+popd

scripts/clean

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+set -e
+
+GIT_ROOT=$(git rev-parse --show-toplevel)
+GIT_COMMIT=$(git rev-list -1 HEAD)
+pushd ${GIT_ROOT}
+
+echo "Rebuilding services..."
+
+mkdir -p bin
+
+for svc in front character item inventory; do
+    rm -rf services/${svc}/gen services/${svc}/cmd services/${svc}/gen services/${svc}/*.go
+done
+
+popd

scripts/example

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+set -e
+
+GIT_ROOT=$(git rev-parse --show-toplevel)
+GIT_COMMIT=$(git rev-list -1 HEAD)
+pushd ${GIT_ROOT}
+
+echo "Rebuilding services..."
+
+mkdir -p bin
+
+for svc in front character item inventory; do
+  goa example crossnokaye-interview-assignment/services/${svc}/design -o services/${svc}
+done
+
+popd

services/character/character.go

@@ -0,0 +1,45 @@
+package characterapi
+
+import (
+	"context"
+	character "crossnokaye-interview-assignment/services/character/gen/character"
+	"log"
+)
+
+// character service example implementation.
+// The example methods log the requests and return zero values.
+type charactersrvc struct {
+	logger *log.Logger
+}
+
+// NewCharacter returns the character service implementation.
+func NewCharacter(logger *log.Logger) character.Service {
+	return &charactersrvc{logger}
+}
+
+// GetCharacter implements getCharacter.
+func (s *charactersrvc) GetCharacter(ctx context.Context, p int) (res *character.Character, err error) {
+	res = &character.Character{}
+	s.logger.Print("character.getCharacter")
+	return
+}
+
+// CreateCharacter implements createCharacter.
+func (s *charactersrvc) CreateCharacter(ctx context.Context, p *character.Character) (res *character.Character, err error) {
+	res = &character.Character{}
+	s.logger.Print("character.createCharacter")
+	return
+}
+
+// UpdateCharacter implements updateCharacter.
+func (s *charactersrvc) UpdateCharacter(ctx context.Context, p *character.Character) (res *character.Character, err error) {
+	res = &character.Character{}
+	s.logger.Print("character.updateCharacter")
+	return
+}
+
+// DeleteCharacter implements deleteCharacter.
+func (s *charactersrvc) DeleteCharacter(ctx context.Context, p int) (err error) {
+	s.logger.Print("character.deleteCharacter")
+	return
+}

services/character/design/design.go

@@ -0,0 +1,75 @@
+package design
+
+import (
+	. "crossnokaye-interview-assignment/design"
+
+	. "goa.design/goa/v3/dsl"
+)
+
+var _ = API("character", func() {
+	Title("Character Srvice")
+	Server("character", func() {
+        Host("localhost", func() {
+            URI("grpc://localhost:8083")
+        })
+    })
+})
+
+var _ = Service("character", func() {
+	Description("A GRPC back service that handles CRUD operations for the characters and their attributes")
+
+	Method("getCharacter", func() {
+		Payload(Int)
+		Result(Character)
+		Error("NotFound")
+		Error("BadRequest")
+
+		GRPC(func() {
+			Response(CodeOK)
+			Response("NotFound", CodeNotFound)
+			Response("BadRequest", CodeInvalidArgument)
+		})
+	})
+
+	// Method("listCharacters", func() {
+	// })
+
+	Method("createCharacter", func() {
+		Payload(Character)
+		Result(Character)
+		Error("BadRequest")
+		Error("NotFound")
+
+		GRPC(func() {
+			Response(CodeOK)
+			Response("NotFound", CodeNotFound)
+			Response("BadRequest", CodeInvalidArgument)
+		})
+	})
+
+	Method("updateCharacter", func() {
+		Payload(Character)
+		Result(Character)
+		Error("NotFound")
+		Error("BadRequest")
+
+		GRPC(func() {
+			Response(CodeOK)
+			Response("NotFound", CodeNotFound)
+			Response("BadRequest", CodeInvalidArgument)
+		})
+	})
+
+	Method("deleteCharacter", func() {
+		Payload(Int)
+		Result(Empty)
+		Error("NotFound")
+		Error("BadRequest")
+
+		GRPC(func() {
+			Response(CodeOK)
+			Response("NotFound", CodeNotFound)
+			Response("BadRequest", CodeInvalidArgument)
+		})
+	})
+})

services/front/design/design.go

@@ -0,0 +1,220 @@
+package design
+
+import (
+	. "crossnokaye-interview-assignment/design"
+
+	. "goa.design/goa/v3/dsl"
+)
+
+var _ = API("front", func() {
+	Title("API Front Service")
+	Description("An HTTP/JSON front service which provides an API to manipulate the Characters, their inventories, and the Items that exist")
+    Server("front", func() {
+        Host("localhost", func() {
+            URI("http://localhost:8000")
+        })
+    })
+})
+
+var _ = Service("front", func() {
+	Description("A GRPC back service that handles CRUD operations for the Items that exist and their attributes")
+
+	Method("getItem", func() {
+		Payload(Int)
+		Result(Item)
+		Error("NotFound")
+
+		HTTP(func() {
+			GET("/Item/{id}")
+			Response(StatusOK)
+			Response(StatusBadRequest)
+			Response(StatusNotFound)
+		})
+
+		GRPC(func() {
+			Response(CodeOK)
+		})
+	})
+
+	// Method("listItems", func() {
+	// })
+
+	Method("createItem", func() {
+		Payload(Item)
+		Result(Item)
+		Error("BadRequest")
+
+		HTTP(func() {
+			POST("/Item")
+			Body(Item)
+			Response(StatusOK)
+			Response(StatusBadRequest)
+		})
+
+		GRPC(func() {
+			Response(CodeOK)
+		})
+	})
+
+	Method("updateItem", func() {
+		Payload(Item)
+		Result(Item)
+		Error("NotFound")
+		Error("BadRequest")
+
+		HTTP(func() {
+			PUT("/Item/{id}")
+			Body(Item)
+			Response(StatusOK)
+			Response(StatusBadRequest)
+			Response(StatusNotFound)
+		})
+
+		GRPC(func() {
+			Response(CodeOK)
+		})
+	})
+
+	Method("deleteItem", func() {
+		Payload(Int)
+		Result(Empty)
+		Error("NotFound")
+		Error("BadRequest")
+
+		HTTP(func() {
+			POST("/Item/{id}")
+			Response(StatusOK)
+			Response(StatusBadRequest)
+			Response(StatusNotFound)
+		})
+
+		GRPC(func() {
+			Response(CodeOK)
+			Response("NotFound", CodeNotFound)
+			Response("BadRequest", CodeInvalidArgument)
+		})
+	})
+
+	Method("getCharacter", func() {
+		Payload(Int)
+		Result(Character)
+		Error("NotFound")
+		Error("BadRequest")
+
+		HTTP(func() {
+			GET("/Character/{id}")
+			Response(StatusOK)
+			Response(StatusBadRequest)
+			Response(StatusNotFound)
+		})
+
+		GRPC(func() {
+			Response(CodeOK)
+			Response("NotFound", CodeNotFound)
+			Response("BadRequest", CodeInvalidArgument)
+		})
+	})
+
+	// Method("listCharacters", func() {
+	// })
+
+	Method("createCharacter", func() {
+		Payload(Character)
+		Result(Character)
+		Error("BadRequest")
+		Error("NotFound")
+
+		HTTP(func() {
+			POST("/Character")
+			Body(Character)
+			Response(StatusBadRequest)
+			Response(StatusOK)
+			Response(StatusInternalServerError)
+		})
+
+		GRPC(func() {
+			Response(CodeOK)
+			Response("NotFound", CodeNotFound)
+			Response("BadRequest", CodeInvalidArgument)
+		})
+	})
+
+	Method("updateCharacter", func() {
+		Payload(Character)
+		Result(Character)
+		Error("NotFound")
+		Error("BadRequest")
+
+		HTTP(func() {
+			PUT("/Character/{id}")
+			Body(Character)
+			Response(StatusOK)
+			Response(StatusBadRequest)
+			Response(StatusNotFound)
+		})
+
+		GRPC(func() {
+			Response(CodeOK)
+			Response("NotFound", CodeNotFound)
+			Response("BadRequest", CodeInvalidArgument)
+		})
+	})
+
+	Method("deleteCharacter", func() {
+		Payload(Int)
+		Result(Empty)
+		Error("NotFound")
+		Error("BadRequest")
+
+		HTTP(func() {
+			POST("/Character/{id}")
+			Response(StatusOK)
+			Response(StatusBadRequest)
+			Response(StatusNotFound)
+		})
+
+		GRPC(func() {
+			Response(CodeOK)
+			Response("NotFound", CodeNotFound)
+			Response("BadRequest", CodeInvalidArgument)
+		})
+	})
+
+	Method("addItemToInventory", func() {
+		Payload(Int)
+		Result(Empty)
+		Error("NotFound")
+		Error("BadRequest")
+
+		HTTP(func() {
+			POST("/inventory/{CharacterId}")
+			Response(StatusOK)
+			Response(StatusBadRequest)
+		})
+
+		GRPC(func() {
+			Response(CodeOK)
+		})
+	})
+
+	Method("removeItemFromInventory", func() {
+		Payload(Int)
+		Result(Empty)
+		Error("NotFound")
+		Error("BadRequest")
+
+		HTTP(func() {
+			PUT("/inventory/{CharacterId}")
+			Response(StatusOK)
+			Response(StatusBadRequest)
+		})
+
+		GRPC(func() {
+			Response(CodeOK)
+			Response("NotFound", CodeNotFound)
+			Response("BadRequest", CodeInvalidArgument)
+		})
+	})
+
+	Files("/openapi.json", "./gen/http/openapi.json")
+})

services/front/front.go

@@ -0,0 +1,84 @@
+package frontapi
+
+import (
+	"context"
+	front "crossnokaye-interview-assignment/services/front/gen/front"
+	"log"
+)
+
+// front service example implementation.
+// The example methods log the requests and return zero values.
+type frontsrvc struct {
+	logger *log.Logger
+}
+
+// NewFront returns the front service implementation.
+func NewFront(logger *log.Logger) front.Service {
+	return &frontsrvc{logger}
+}
+
+// GetItem implements getItem.
+func (s *frontsrvc) GetItem(ctx context.Context, p int) (res *front.Item, err error) {
+	res = &front.Item{}
+	s.logger.Print("front.getItem")
+	return
+}
+
+// CreateItem implements createItem.
+func (s *frontsrvc) CreateItem(ctx context.Context, p *front.Item) (res *front.Item, err error) {
+	res = &front.Item{}
+	s.logger.Print("front.createItem")
+	return
+}
+
+// UpdateItem implements updateItem.
+func (s *frontsrvc) UpdateItem(ctx context.Context, p *front.Item) (res *front.Item, err error) {
+	res = &front.Item{}
+	s.logger.Print("front.updateItem")
+	return
+}
+
+// DeleteItem implements deleteItem.
+func (s *frontsrvc) DeleteItem(ctx context.Context, p int) (err error) {
+	s.logger.Print("front.deleteItem")
+	return
+}
+
+// GetCharacter implements getCharacter.
+func (s *frontsrvc) GetCharacter(ctx context.Context, p int) (res *front.Character, err error) {
+	res = &front.Character{}
+	s.logger.Print("front.getCharacter")
+	return
+}
+
+// CreateCharacter implements createCharacter.
+func (s *frontsrvc) CreateCharacter(ctx context.Context, p *front.Character) (res *front.Character, err error) {
+	res = &front.Character{}
+	s.logger.Print("front.createCharacter")
+	return
+}
+
+// UpdateCharacter implements updateCharacter.
+func (s *frontsrvc) UpdateCharacter(ctx context.Context, p *front.Character) (res *front.Character, err error) {
+	res = &front.Character{}
+	s.logger.Print("front.updateCharacter")
+	return
+}
+
+// DeleteCharacter implements deleteCharacter.
+func (s *frontsrvc) DeleteCharacter(ctx context.Context, p int) (err error) {
+	s.logger.Print("front.deleteCharacter")
+	return
+}
+
+// AddItemToInventory implements addItemToInventory.
+func (s *frontsrvc) AddItemToInventory(ctx context.Context, p int) (err error) {
+	s.logger.Print("front.addItemToInventory")
+	return
+}
+
+// RemoveItemFromInventory implements removeItemFromInventory.
+func (s *frontsrvc) RemoveItemFromInventory(ctx context.Context, p int) (err error) {
+	s.logger.Print("front.removeItemFromInventory")
+	return
+}

services/inventory/design/design.go

@@ -0,0 +1,44 @@
+package design
+
+import (
+	. "goa.design/goa/v3/dsl"
+)
+
+var _ = API("inventory", func() {
+	Title("Inventory Service")
+	Server("inventory", func() {
+        Host("localhost", func() {
+            URI("grpc://localhost:8081")
+        })
+    })
+})
+
+var _ = Service("inventory", func() {
+	Description("A GRPC back service that handles CRUD operations for the characters’ inventories")
+	// Method("listItems", func() {
+	// })
+
+	Method("addItem", func() {
+		Payload(Int)
+		Result(Empty)
+		Error("NotFound")
+		Error("BadRequest")
+
+		GRPC(func() {
+			Response(CodeOK)
+		})
+	})
+
+	Method("removeItem", func() {
+		Payload(Int)
+		Result(Empty)
+		Error("NotFound")
+		Error("BadRequest")
+
+		GRPC(func() {
+			Response(CodeOK)
+			Response("NotFound", CodeNotFound)
+			Response("BadRequest", CodeInvalidArgument)
+		})
+	})
+})

services/inventory/inventory.go

@@ -0,0 +1,30 @@
+package inventoryapi
+
+import (
+	"context"
+	inventory "crossnokaye-interview-assignment/services/inventory/gen/inventory"
+	"log"
+)
+
+// inventory service example implementation.
+// The example methods log the requests and return zero values.
+type inventorysrvc struct {
+	logger *log.Logger
+}
+
+// NewInventory returns the inventory service implementation.
+func NewInventory(logger *log.Logger) inventory.Service {
+	return &inventorysrvc{logger}
+}
+
+// AddItem implements addItem.
+func (s *inventorysrvc) AddItem(ctx context.Context, p int) (err error) {
+	s.logger.Print("inventory.addItem")
+	return
+}
+
+// RemoveItem implements removeItem.
+func (s *inventorysrvc) RemoveItem(ctx context.Context, p int) (err error) {
+	s.logger.Print("inventory.removeItem")
+	return
+}

services/item/design/design.go

@@ -0,0 +1,67 @@
+package design
+
+import (
+	. "crossnokaye-interview-assignment/design"
+
+	. "goa.design/goa/v3/dsl"
+)
+
+var _ = API("item", func() {
+	Title("Item Service")
+	Server("item", func() {
+        Host("localhost", func() {
+            URI("grpc://localhost:8082")
+        })
+    })
+})
+
+var _ = Service("item", func() {
+	Description("A GRPC back service that handles CRUD operations for the items that exist and their attributes")
+
+	Method("getItem", func() {
+		Payload(Int)
+		Result(Item)
+		Error("NotFound")
+
+		GRPC(func() {
+			Response(CodeOK)
+		})
+	})
+
+	// Method("listItems", func() {
+	// })
+
+	Method("createItem", func() {
+		Payload(Item)
+		Result(Item)
+		Error("BadRequest")
+
+		GRPC(func() {
+			Response(CodeOK)
+		})
+	})
+
+	Method("updateItem", func() {
+		Payload(Item)
+		Result(Item)
+		Error("NotFound")
+		Error("BadRequest")
+
+		GRPC(func() {
+			Response(CodeOK)
+		})
+	})
+
+	Method("deleteItem", func() {
+		Payload(Int)
+		Result(Empty)
+		Error("NotFound")
+		Error("BadRequest")
+
+		GRPC(func() {
+			Response(CodeOK)
+			Response("NotFound", CodeNotFound)
+			Response("BadRequest", CodeInvalidArgument)
+		})
+	})
+})

services/item/item.go

@@ -0,0 +1,45 @@
+package itemapi
+
+import (
+	"context"
+	item "crossnokaye-interview-assignment/services/item/gen/item"
+	"log"
+)
+
+// item service example implementation.
+// The example methods log the requests and return zero values.
+type itemsrvc struct {
+	logger *log.Logger
+}
+
+// NewItem returns the item service implementation.
+func NewItem(logger *log.Logger) item.Service {
+	return &itemsrvc{logger}
+}
+
+// GetItem implements getItem.
+func (s *itemsrvc) GetItem(ctx context.Context, p int) (res *item.Item, err error) {
+	res = &item.Item{}
+	s.logger.Print("item.getItem")
+	return
+}
+
+// CreateItem implements createItem.
+func (s *itemsrvc) CreateItem(ctx context.Context, p *item.Item) (res *item.Item, err error) {
+	res = &item.Item{}
+	s.logger.Print("item.createItem")
+	return
+}
+
+// UpdateItem implements updateItem.
+func (s *itemsrvc) UpdateItem(ctx context.Context, p *item.Item) (res *item.Item, err error) {
+	res = &item.Item{}
+	s.logger.Print("item.updateItem")
+	return
+}
+
+// DeleteItem implements deleteItem.
+func (s *itemsrvc) DeleteItem(ctx context.Context, p int) (err error) {
+	s.logger.Print("item.deleteItem")
+	return
+}