Merge branch '12-retrieve-task-result' into 'main'

HTTP endpoint to retreive task results

Closes #12

See merge request !7

cmd/task/main.go

@@ -90,7 +90,7 @@ func main() {
 		healthSvc goahealth.Service
 	)
 	{
-		taskSvc = task.New(storage, storage, logger)
+		taskSvc = task.New(storage, storage, cache, logger)
 		healthSvc = health.New()
 	}
 

design/design.go

@@ -37,6 +37,16 @@ var _ = Service("task", func() {
 			Response(StatusOK)
 		})
 	})
+
+	Method("TaskResult", func() {
+		Description("TaskResult retrieves task result from the Cache service.")
+		Payload(TaskResultRequest)
+		Result(Any)
+		HTTP(func() {
+			GET("/v1/taskResult/{taskID}")
+			Response(StatusOK)
+		})
+	})
 })
 
 var _ = Service("health", func() {

design/types.go

@@ -15,3 +15,8 @@ var CreateResult = Type("CreateResult", func() {
 	Field(1, "taskID", String, "Unique task identifier.")
 	Required("taskID")
 })
+
+var TaskResultRequest = Type("TaskResultRequest", func() {
+	Field(1, "taskID", String, "Unique task identifier.")
+	Required("taskID")
+})

gen/http/cli/task/cli.go

@@ -25,14 +25,14 @@ import (
 //
 func UsageCommands() string {
 	return `health (liveness|readiness)
-task create
+task (create|task-result)
 `
 }
 
 // UsageExamples produces an example of a valid invocation of the CLI tool.
 func UsageExamples() string {
 	return os.Args[0] + ` health liveness` + "\n" +
-		os.Args[0] + ` task create --body "Nam et." --task-name "Minus reprehenderit non quo nihil adipisci." --cache-namespace "Pariatur sequi et." --cache-scope "Corrupti facere sequi tempora eius assumenda molestiae."` + "\n" +
+		os.Args[0] + ` task create --body "Eaque excepturi suscipit veritatis nemo." --task-name "Corrupti facere sequi tempora eius assumenda molestiae." --cache-namespace "Laborum sapiente." --cache-scope "Nam et."` + "\n" +
 		""
 }
 
@@ -59,6 +59,9 @@ func ParseEndpoint(
 		taskCreateTaskNameFlag       = taskCreateFlags.String("task-name", "REQUIRED", "Task name.")
 		taskCreateCacheNamespaceFlag = taskCreateFlags.String("cache-namespace", "", "")
 		taskCreateCacheScopeFlag     = taskCreateFlags.String("cache-scope", "", "")
+
+		taskTaskResultFlags      = flag.NewFlagSet("task-result", flag.ExitOnError)
+		taskTaskResultTaskIDFlag = taskTaskResultFlags.String("task-id", "REQUIRED", "Unique task identifier.")
 	)
 	healthFlags.Usage = healthUsage
 	healthLivenessFlags.Usage = healthLivenessUsage
@@ -66,6 +69,7 @@ func ParseEndpoint(
 
 	taskFlags.Usage = taskUsage
 	taskCreateFlags.Usage = taskCreateUsage
+	taskTaskResultFlags.Usage = taskTaskResultUsage
 
 	if err := flag.CommandLine.Parse(os.Args[1:]); err != nil {
 		return nil, nil, err
@@ -116,6 +120,9 @@ func ParseEndpoint(
 			case "create":
 				epf = taskCreateFlags
 
+			case "task-result":
+				epf = taskTaskResultFlags
+
 			}
 
 		}
@@ -154,6 +161,9 @@ func ParseEndpoint(
 			case "create":
 				endpoint = c.Create()
 				data, err = taskc.BuildCreatePayload(*taskCreateBodyFlag, *taskCreateTaskNameFlag, *taskCreateCacheNamespaceFlag, *taskCreateCacheScopeFlag)
+			case "task-result":
+				endpoint = c.TaskResult()
+				data, err = taskc.BuildTaskResultPayload(*taskTaskResultTaskIDFlag)
 			}
 		}
 	}
@@ -206,6 +216,7 @@ Usage:
 
 COMMAND:
     create: Create a task and put it in a queue for execution.
+    task-result: TaskResult retrieves task result from the Cache service.
 
 Additional help:
     %[1]s task COMMAND --help
@@ -221,6 +232,17 @@ Create a task and put it in a queue for execution.
     -cache-scope STRING: 
 
 Example:
-    %[1]s task create --body "Nam et." --task-name "Minus reprehenderit non quo nihil adipisci." --cache-namespace "Pariatur sequi et." --cache-scope "Corrupti facere sequi tempora eius assumenda molestiae."
+    %[1]s task create --body "Eaque excepturi suscipit veritatis nemo." --task-name "Corrupti facere sequi tempora eius assumenda molestiae." --cache-namespace "Laborum sapiente." --cache-scope "Nam et."
+`, os.Args[0])
+}
+
+func taskTaskResultUsage() {
+	fmt.Fprintf(os.Stderr, `%[1]s [flags] task task-result -task-id STRING
+
+TaskResult retrieves task result from the Cache service.
+    -task-id STRING: Unique task identifier.
+
+Example:
+    %[1]s task task-result --task-id "Et ipsa voluptate."
 `, os.Args[0])
 }

gen/http/openapi.json

-{"swagger":"2.0","info":{"title":"Task Service","description":"The task service is executing tasks created from policies.","version":""},"host":"localhost:8082","consumes":["application/json","application/xml","application/gob"],"produces":["application/json","application/xml","application/gob"],"paths":{"/liveness":{"get":{"tags":["health"],"summary":"Liveness health","operationId":"health#Liveness","responses":{"200":{"description":"OK response."}},"schemes":["http"]}},"/readiness":{"get":{"tags":["health"],"summary":"Readiness health","operationId":"health#Readiness","responses":{"200":{"description":"OK response."}},"schemes":["http"]}},"/v1/task/{taskName}":{"post":{"tags":["task"],"summary":"Create task","description":"Create a task and put it in a queue for execution.","operationId":"task#Create","parameters":[{"name":"taskName","in":"path","description":"Task name.","required":true,"type":"string"},{"name":"x-cache-namespace","in":"header","description":"Cache key namespace","required":false,"type":"string"},{"name":"x-cache-scope","in":"header","description":"Cache key scope","required":false,"type":"string"},{"name":"any","in":"body","description":"Data contains JSON payload that will be used for task execution.","required":true,"schema":{"type":"string","format":"binary"}}],"responses":{"200":{"description":"OK response.","schema":{"$ref":"#/definitions/TaskCreateResponseBody","required":["taskID"]}}},"schemes":["http"]}}},"definitions":{"TaskCreateResponseBody":{"title":"TaskCreateResponseBody","type":"object","properties":{"taskID":{"type":"string","description":"Unique task identifier.","example":"Eaque excepturi suscipit veritatis nemo."}},"example":{"taskID":"Corrupti quia autem dolorum sunt aperiam quaerat."},"required":["taskID"]}}}
\ No newline at end of file
+{"swagger":"2.0","info":{"title":"Task Service","description":"The task service is executing tasks created from policies.","version":""},"host":"localhost:8082","consumes":["application/json","application/xml","application/gob"],"produces":["application/json","application/xml","application/gob"],"paths":{"/liveness":{"get":{"tags":["health"],"summary":"Liveness health","operationId":"health#Liveness","responses":{"200":{"description":"OK response."}},"schemes":["http"]}},"/readiness":{"get":{"tags":["health"],"summary":"Readiness health","operationId":"health#Readiness","responses":{"200":{"description":"OK response."}},"schemes":["http"]}},"/v1/task/{taskName}":{"post":{"tags":["task"],"summary":"Create task","description":"Create a task and put it in a queue for execution.","operationId":"task#Create","parameters":[{"name":"taskName","in":"path","description":"Task name.","required":true,"type":"string"},{"name":"x-cache-namespace","in":"header","description":"Cache key namespace","required":false,"type":"string"},{"name":"x-cache-scope","in":"header","description":"Cache key scope","required":false,"type":"string"},{"name":"any","in":"body","description":"Data contains JSON payload that will be used for task execution.","required":true,"schema":{"type":"string","format":"binary"}}],"responses":{"200":{"description":"OK response.","schema":{"$ref":"#/definitions/TaskCreateResponseBody","required":["taskID"]}}},"schemes":["http"]}},"/v1/taskResult/{taskID}":{"get":{"tags":["task"],"summary":"TaskResult task","description":"TaskResult retrieves task result from the Cache service.","operationId":"task#TaskResult","parameters":[{"name":"taskID","in":"path","description":"Unique task identifier.","required":true,"type":"string"}],"responses":{"200":{"description":"OK response.","schema":{"type":"string","format":"binary"}}},"schemes":["http"]}}},"definitions":{"TaskCreateResponseBody":{"title":"TaskCreateResponseBody","type":"object","properties":{"taskID":{"type":"string","description":"Unique task identifier.","example":"Vel odio et doloribus est quod laborum."}},"example":{"taskID":"Harum aut autem aliquam dolorem non soluta."},"required":["taskID"]}}}
\ No newline at end of file

gen/http/openapi.yaml

@@ -74,6 +74,27 @@ paths:
             - taskID
       schemes:
       - http
+  /v1/taskResult/{taskID}:
+    get:
+      tags:
+      - task
+      summary: TaskResult task
+      description: TaskResult retrieves task result from the Cache service.
+      operationId: task#TaskResult
+      parameters:
+      - name: taskID
+        in: path
+        description: Unique task identifier.
+        required: true
+        type: string
+      responses:
+        "200":
+          description: OK response.
+          schema:
+            type: string
+            format: binary
+      schemes:
+      - http
 definitions:
   TaskCreateResponseBody:
     title: TaskCreateResponseBody
@@ -82,8 +103,8 @@ definitions:
       taskID:
         type: string
         description: Unique task identifier.
-        example: Eaque excepturi suscipit veritatis nemo.
+        example: Vel odio et doloribus est quod laborum.
     example:
-      taskID: Corrupti quia autem dolorum sunt aperiam quaerat.
+      taskID: Harum aut autem aliquam dolorem non soluta.
     required:
     - taskID

gen/http/openapi3.json

-{"openapi":"3.0.3","info":{"title":"Task Service","description":"The task service is executing tasks created from policies.","version":"1.0"},"servers":[{"url":"http://localhost:8082","description":"Task Server"}],"paths":{"/liveness":{"get":{"tags":["health"],"summary":"Liveness health","operationId":"health#Liveness","responses":{"200":{"description":"OK response."}}}},"/readiness":{"get":{"tags":["health"],"summary":"Readiness health","operationId":"health#Readiness","responses":{"200":{"description":"OK response."}}}},"/v1/task/{taskName}":{"post":{"tags":["task"],"summary":"Create task","description":"Create a task and put it in a queue for execution.","operationId":"task#Create","parameters":[{"name":"taskName","in":"path","description":"Task name.","required":true,"schema":{"type":"string","description":"Task name.","example":"Vel odio et doloribus est quod laborum."},"example":"Harum aut autem aliquam dolorem non soluta."},{"name":"x-cache-namespace","in":"header","description":"Cache key namespace","allowEmptyValue":true,"schema":{"type":"string","description":"Cache key namespace","example":"login"},"example":"login"},{"name":"x-cache-scope","in":"header","description":"Cache key scope","allowEmptyValue":true,"schema":{"type":"string","description":"Cache key scope","example":"user"},"example":"user"}],"requestBody":{"description":"Data contains JSON payload that will be used for task execution.","required":true,"content":{"application/json":{"schema":{"type":"string","description":"Data contains JSON payload that will be used for task execution.","example":"Eveniet et eligendi sint quibusdam quia maxime.","format":"binary"},"example":"Ipsam et est accusantium."}}},"responses":{"200":{"description":"OK response.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/CreateResult"},"example":{"taskID":"Facere quibusdam voluptate beatae."}}}}}}}},"components":{"schemas":{"CreateResult":{"type":"object","properties":{"taskID":{"type":"string","description":"Unique task identifier.","example":"Et ipsa voluptate."}},"example":{"taskID":"Quo qui fuga impedit eos fuga et."},"required":["taskID"]}}},"tags":[{"name":"health","description":"Health service provides health check endpoints."},{"name":"task","description":"Task service provides endpoints to work with tasks."}]}
\ No newline at end of file
+{"openapi":"3.0.3","info":{"title":"Task Service","description":"The task service is executing tasks created from policies.","version":"1.0"},"servers":[{"url":"http://localhost:8082","description":"Task Server"}],"paths":{"/liveness":{"get":{"tags":["health"],"summary":"Liveness health","operationId":"health#Liveness","responses":{"200":{"description":"OK response."}}}},"/readiness":{"get":{"tags":["health"],"summary":"Readiness health","operationId":"health#Readiness","responses":{"200":{"description":"OK response."}}}},"/v1/task/{taskName}":{"post":{"tags":["task"],"summary":"Create task","description":"Create a task and put it in a queue for execution.","operationId":"task#Create","parameters":[{"name":"taskName","in":"path","description":"Task name.","required":true,"schema":{"type":"string","description":"Task name.","example":"Aut qui aut itaque et commodi vel."},"example":"Sapiente et."},{"name":"x-cache-namespace","in":"header","description":"Cache key namespace","allowEmptyValue":true,"schema":{"type":"string","description":"Cache key namespace","example":"login"},"example":"login"},{"name":"x-cache-scope","in":"header","description":"Cache key scope","allowEmptyValue":true,"schema":{"type":"string","description":"Cache key scope","example":"user"},"example":"user"}],"requestBody":{"description":"Data contains JSON payload that will be used for task execution.","required":true,"content":{"application/json":{"schema":{"type":"string","description":"Data contains JSON payload that will be used for task execution.","example":"Excepturi aut consequatur animi rerum.","format":"binary"},"example":"Dolorem illo officiis ipsa impedit harum et."}}},"responses":{"200":{"description":"OK response.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/CreateResult"},"example":{"taskID":"Corrupti quia autem dolorum sunt aperiam quaerat."}}}}}}},"/v1/taskResult/{taskID}":{"get":{"tags":["task"],"summary":"TaskResult task","description":"TaskResult retrieves task result from the Cache service.","operationId":"task#TaskResult","parameters":[{"name":"taskID","in":"path","description":"Unique task identifier.","required":true,"schema":{"type":"string","description":"Unique task identifier.","example":"Delectus natus eos."},"example":"Quae ut dolores ab."}],"responses":{"200":{"description":"OK response.","content":{"application/json":{"schema":{"type":"string","example":"Illum quidem sapiente sed velit.","format":"binary"},"example":"Omnis commodi reiciendis eum non."}}}}}}},"components":{"schemas":{"CreateResult":{"type":"object","properties":{"taskID":{"type":"string","description":"Unique task identifier.","example":"Dolores atque error ab."}},"example":{"taskID":"Laboriosam perspiciatis vitae numquam."},"required":["taskID"]}}},"tags":[{"name":"health","description":"Health service provides health check endpoints."},{"name":"task","description":"Task service provides endpoints to work with tasks."}]}
\ No newline at end of file

gen/http/openapi3.yaml

@@ -40,8 +40,8 @@ paths:
         schema:
           type: string
           description: Task name.
-          example: Vel odio et doloribus est quod laborum.
-        example: Harum aut autem aliquam dolorem non soluta.
+          example: Aut qui aut itaque et commodi vel.
+        example: Sapiente et.
       - name: x-cache-namespace
         in: header
         description: Cache key namespace
@@ -68,9 +68,9 @@ paths:
             schema:
               type: string
               description: Data contains JSON payload that will be used for task execution.
-              example: Eveniet et eligendi sint quibusdam quia maxime.
+              example: Excepturi aut consequatur animi rerum.
               format: binary
-            example: Ipsam et est accusantium.
+            example: Dolorem illo officiis ipsa impedit harum et.
       responses:
         "200":
           description: OK response.
@@ -79,7 +79,34 @@ paths:
               schema:
                 $ref: '#/components/schemas/CreateResult'
               example:
-                taskID: Facere quibusdam voluptate beatae.
+                taskID: Corrupti quia autem dolorum sunt aperiam quaerat.
+  /v1/taskResult/{taskID}:
+    get:
+      tags:
+      - task
+      summary: TaskResult task
+      description: TaskResult retrieves task result from the Cache service.
+      operationId: task#TaskResult
+      parameters:
+      - name: taskID
+        in: path
+        description: Unique task identifier.
+        required: true
+        schema:
+          type: string
+          description: Unique task identifier.
+          example: Delectus natus eos.
+        example: Quae ut dolores ab.
+      responses:
+        "200":
+          description: OK response.
+          content:
+            application/json:
+              schema:
+                type: string
+                example: Illum quidem sapiente sed velit.
+                format: binary
+              example: Omnis commodi reiciendis eum non.
 components:
   schemas:
     CreateResult:
@@ -88,9 +115,9 @@ components:
         taskID:
           type: string
           description: Unique task identifier.
-          example: Et ipsa voluptate.
+          example: Dolores atque error ab.
       example:
-        taskID: Quo qui fuga impedit eos fuga et.
+        taskID: Laboriosam perspiciatis vitae numquam.
       required:
       - taskID
 tags:

gen/http/task/client/cli.go

@@ -22,7 +22,7 @@ func BuildCreatePayload(taskCreateBody string, taskCreateTaskName string, taskCr
 	{
 		err = json.Unmarshal([]byte(taskCreateBody), &body)
 		if err != nil {
-			return nil, fmt.Errorf("invalid JSON for body, \nerror: %s, \nexample of valid JSON:\n%s", err, "\"Nam et.\"")
+			return nil, fmt.Errorf("invalid JSON for body, \nerror: %s, \nexample of valid JSON:\n%s", err, "\"Eaque excepturi suscipit veritatis nemo.\"")
 		}
 	}
 	var taskName string
@@ -51,3 +51,16 @@ func BuildCreatePayload(taskCreateBody string, taskCreateTaskName string, taskCr
 
 	return res, nil
 }
+
+// BuildTaskResultPayload builds the payload for the task TaskResult endpoint
+// from CLI flags.
+func BuildTaskResultPayload(taskTaskResultTaskID string) (*task.TaskResultRequest, error) {
+	var taskID string
+	{
+		taskID = taskTaskResultTaskID
+	}
+	v := &task.TaskResultRequest{}
+	v.TaskID = taskID
+
+	return v, nil
+}

gen/http/task/client/client.go

@@ -20,6 +20,10 @@ type Client struct {
 	// Create Doer is the HTTP client used to make requests to the Create endpoint.
 	CreateDoer goahttp.Doer
 
+	// TaskResult Doer is the HTTP client used to make requests to the TaskResult
+	// endpoint.
+	TaskResultDoer goahttp.Doer
+
 	// RestoreResponseBody controls whether the response bodies are reset after
 	// decoding so they can be read again.
 	RestoreResponseBody bool
@@ -41,6 +45,7 @@ func NewClient(
 ) *Client {
 	return &Client{
 		CreateDoer:          doer,
+		TaskResultDoer:      doer,
 		RestoreResponseBody: restoreBody,
 		scheme:              scheme,
 		host:                host,
@@ -72,3 +77,22 @@ func (c *Client) Create() goa.Endpoint {
 		return decodeResponse(resp)
 	}
 }
+
+// TaskResult returns an endpoint that makes HTTP requests to the task service
+// TaskResult server.
+func (c *Client) TaskResult() goa.Endpoint {
+	var (
+		decodeResponse = DecodeTaskResultResponse(c.decoder, c.RestoreResponseBody)
+	)
+	return func(ctx context.Context, v interface{}) (interface{}, error) {
+		req, err := c.BuildTaskResultRequest(ctx, v)
+		if err != nil {
+			return nil, err
+		}
+		resp, err := c.TaskResultDoer.Do(req)
+		if err != nil {
+			return nil, goahttp.ErrRequestError("task", "TaskResult", err)
+		}
+		return decodeResponse(resp)
+	}
+}

gen/http/task/client/encode_decode.go

@@ -106,3 +106,63 @@ func DecodeCreateResponse(decoder func(*http.Response) goahttp.Decoder, restoreB
 		}
 	}
 }
+
+// BuildTaskResultRequest instantiates a HTTP request object with method and
+// path set to call the "task" service "TaskResult" endpoint
+func (c *Client) BuildTaskResultRequest(ctx context.Context, v interface{}) (*http.Request, error) {
+	var (
+		taskID string
+	)
+	{
+		p, ok := v.(*task.TaskResultRequest)
+		if !ok {
+			return nil, goahttp.ErrInvalidType("task", "TaskResult", "*task.TaskResultRequest", v)
+		}
+		taskID = p.TaskID
+	}
+	u := &url.URL{Scheme: c.scheme, Host: c.host, Path: TaskResultTaskPath(taskID)}
+	req, err := http.NewRequest("GET", u.String(), nil)
+	if err != nil {
+		return nil, goahttp.ErrInvalidURL("task", "TaskResult", u.String(), err)
+	}
+	if ctx != nil {
+		req = req.WithContext(ctx)
+	}
+
+	return req, nil
+}
+
+// DecodeTaskResultResponse returns a decoder for responses returned by the
+// task TaskResult endpoint. restoreBody controls whether the response body
+// should be restored after having been read.
+func DecodeTaskResultResponse(decoder func(*http.Response) goahttp.Decoder, restoreBody bool) func(*http.Response) (interface{}, error) {
+	return func(resp *http.Response) (interface{}, error) {
+		if restoreBody {
+			b, err := ioutil.ReadAll(resp.Body)
+			if err != nil {
+				return nil, err
+			}
+			resp.Body = ioutil.NopCloser(bytes.NewBuffer(b))
+			defer func() {
+				resp.Body = ioutil.NopCloser(bytes.NewBuffer(b))
+			}()
+		} else {
+			defer resp.Body.Close()
+		}
+		switch resp.StatusCode {
+		case http.StatusOK:
+			var (
+				body interface{}
+				err  error
+			)
+			err = decoder(resp).Decode(&body)
+			if err != nil {
+				return nil, goahttp.ErrDecodingError("task", "TaskResult", err)
+			}
+			return body, nil
+		default:
+			body, _ := ioutil.ReadAll(resp.Body)
+			return nil, goahttp.ErrInvalidResponse("task", "TaskResult", resp.StatusCode, string(body))
+		}
+	}
+}

gen/http/task/client/paths.go

@@ -15,3 +15,8 @@ import (
 func CreateTaskPath(taskName string) string {
 	return fmt.Sprintf("/v1/task/%v", taskName)
 }
+
+// TaskResultTaskPath returns the URL path to the task service TaskResult HTTP endpoint.
+func TaskResultTaskPath(taskID string) string {
+	return fmt.Sprintf("/v1/taskResult/%v", taskID)
+}

gen/http/task/server/encode_decode.go

@@ -66,3 +66,31 @@ func DecodeCreateRequest(mux goahttp.Muxer, decoder func(*http.Request) goahttp.
 		return payload, nil
 	}
 }
+
+// EncodeTaskResultResponse returns an encoder for responses returned by the
+// task TaskResult endpoint.
+func EncodeTaskResultResponse(encoder func(context.Context, http.ResponseWriter) goahttp.Encoder) func(context.Context, http.ResponseWriter, interface{}) error {
+	return func(ctx context.Context, w http.ResponseWriter, v interface{}) error {
+		res, _ := v.(interface{})
+		enc := encoder(ctx, w)
+		body := res
+		w.WriteHeader(http.StatusOK)
+		return enc.Encode(body)
+	}
+}
+
+// DecodeTaskResultRequest returns a decoder for requests sent to the task
+// TaskResult endpoint.
+func DecodeTaskResultRequest(mux goahttp.Muxer, decoder func(*http.Request) goahttp.Decoder) func(*http.Request) (interface{}, error) {
+	return func(r *http.Request) (interface{}, error) {
+		var (
+			taskID string
+
+			params = mux.Vars(r)
+		)
+		taskID = params["taskID"]
+		payload := NewTaskResultRequest(taskID)
+
+		return payload, nil
+	}
+}

gen/http/task/server/paths.go

@@ -15,3 +15,8 @@ import (
 func CreateTaskPath(taskName string) string {
 	return fmt.Sprintf("/v1/task/%v", taskName)
 }
+
+// TaskResultTaskPath returns the URL path to the task service TaskResult HTTP endpoint.
+func TaskResultTaskPath(taskID string) string {
+	return fmt.Sprintf("/v1/taskResult/%v", taskID)
+}

gen/http/task/server/server.go

@@ -18,8 +18,9 @@ import (
 
 // Server lists the task service endpoint HTTP handlers.
 type Server struct {
-	Mounts []*MountPoint
-	Create http.Handler
+	Mounts     []*MountPoint
+	Create     http.Handler
+	TaskResult http.Handler
 }
 
 // ErrorNamer is an interface implemented by generated error structs that
@@ -56,8 +57,10 @@ func New(
 	return &Server{
 		Mounts: []*MountPoint{
 			{"Create", "POST", "/v1/task/{taskName}"},
+			{"TaskResult", "GET", "/v1/taskResult/{taskID}"},
 		},
-		Create: NewCreateHandler(e.Create, mux, decoder, encoder, errhandler, formatter),
+		Create:     NewCreateHandler(e.Create, mux, decoder, encoder, errhandler, formatter),
+		TaskResult: NewTaskResultHandler(e.TaskResult, mux, decoder, encoder, errhandler, formatter),
 	}
 }
 
@@ -67,11 +70,13 @@ func (s *Server) Service() string { return "task" }
 // Use wraps the server handlers with the given middleware.
 func (s *Server) Use(m func(http.Handler) http.Handler) {
 	s.Create = m(s.Create)
+	s.TaskResult = m(s.TaskResult)
 }
 
 // Mount configures the mux to serve the task endpoints.
 func Mount(mux goahttp.Muxer, h *Server) {
 	MountCreateHandler(mux, h.Create)
+	MountTaskResultHandler(mux, h.TaskResult)
 }
 
 // Mount configures the mux to serve the task endpoints.
@@ -129,3 +134,54 @@ func NewCreateHandler(
 		}
 	})
 }
+
+// MountTaskResultHandler configures the mux to serve the "task" service
+// "TaskResult" endpoint.
+func MountTaskResultHandler(mux goahttp.Muxer, h http.Handler) {
+	f, ok := h.(http.HandlerFunc)
+	if !ok {
+		f = func(w http.ResponseWriter, r *http.Request) {
+			h.ServeHTTP(w, r)
+		}
+	}
+	mux.Handle("GET", "/v1/taskResult/{taskID}", f)
+}
+
+// NewTaskResultHandler creates a HTTP handler which loads the HTTP request and
+// calls the "task" service "TaskResult" endpoint.
+func NewTaskResultHandler(
+	endpoint goa.Endpoint,
+	mux goahttp.Muxer,
+	decoder func(*http.Request) goahttp.Decoder,
+	encoder func(context.Context, http.ResponseWriter) goahttp.Encoder,
+	errhandler func(context.Context, http.ResponseWriter, error),
+	formatter func(err error) goahttp.Statuser,
+) http.Handler {
+	var (
+		decodeRequest  = DecodeTaskResultRequest(mux, decoder)
+		encodeResponse = EncodeTaskResultResponse(encoder)
+		encodeError    = goahttp.ErrorEncoder(encoder, formatter)
+	)
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		ctx := context.WithValue(r.Context(), goahttp.AcceptTypeKey, r.Header.Get("Accept"))
+		ctx = context.WithValue(ctx, goa.MethodKey, "TaskResult")
+		ctx = context.WithValue(ctx, goa.ServiceKey, "task")
+		payload, err := decodeRequest(r)
+		if err != nil {
+			if err := encodeError(ctx, w, err); err != nil {
+				errhandler(ctx, w, err)
+			}
+			return
+		}
+		res, err := endpoint(ctx, payload)
+		if err != nil {
+			if err := encodeError(ctx, w, err); err != nil {
+				errhandler(ctx, w, err)
+			}
+			return
+		}
+		if err := encodeResponse(ctx, w, res); err != nil {
+			errhandler(ctx, w, err)
+		}
+	})
+}

gen/http/task/server/types.go

@@ -39,3 +39,11 @@ func NewCreateRequest(body interface{}, taskName string, cacheNamespace *string,
 
 	return res
 }
+
+// NewTaskResultRequest builds a task service TaskResult endpoint payload.
+func NewTaskResultRequest(taskID string) *task.TaskResultRequest {
+	v := &task.TaskResultRequest{}
+	v.TaskID = taskID
+
+	return v
+}

gen/task/client.go

@@ -15,13 +15,15 @@ import (
 
 // Client is the "task" service client.
 type Client struct {
-	CreateEndpoint goa.Endpoint
+	CreateEndpoint     goa.Endpoint
+	TaskResultEndpoint goa.Endpoint
 }
 
 // NewClient initializes a "task" service client given the endpoints.
-func NewClient(create goa.Endpoint) *Client {
+func NewClient(create, taskResult goa.Endpoint) *Client {
 	return &Client{
-		CreateEndpoint: create,
+		CreateEndpoint:     create,
+		TaskResultEndpoint: taskResult,
 	}
 }
 
@@ -34,3 +36,13 @@ func (c *Client) Create(ctx context.Context, p *CreateRequest) (res *CreateResul
 	}
 	return ires.(*CreateResult), nil
 }
+
+// TaskResult calls the "TaskResult" endpoint of the "task" service.
+func (c *Client) TaskResult(ctx context.Context, p *TaskResultRequest) (res interface{}, err error) {
+	var ires interface{}
+	ires, err = c.TaskResultEndpoint(ctx, p)
+	if err != nil {
+		return
+	}
+	return ires.(interface{}), nil
+}

gen/task/endpoints.go

@@ -15,19 +15,22 @@ import (
 
 // Endpoints wraps the "task" service endpoints.
 type Endpoints struct {
-	Create goa.Endpoint
+	Create     goa.Endpoint
+	TaskResult goa.Endpoint
 }
 
 // NewEndpoints wraps the methods of the "task" service with endpoints.
 func NewEndpoints(s Service) *Endpoints {
 	return &Endpoints{
-		Create: NewCreateEndpoint(s),
+		Create:     NewCreateEndpoint(s),
+		TaskResult: NewTaskResultEndpoint(s),
 	}
 }
 
 // Use applies the given middleware to all the "task" service endpoints.
 func (e *Endpoints) Use(m func(goa.Endpoint) goa.Endpoint) {
 	e.Create = m(e.Create)
+	e.TaskResult = m(e.TaskResult)
 }
 
 // NewCreateEndpoint returns an endpoint function that calls the method
@@ -38,3 +41,12 @@ func NewCreateEndpoint(s Service) goa.Endpoint {
 		return s.Create(ctx, p)
 	}
 }
+
+// NewTaskResultEndpoint returns an endpoint function that calls the method
+// "TaskResult" of service "task".
+func NewTaskResultEndpoint(s Service) goa.Endpoint {
+	return func(ctx context.Context, req interface{}) (interface{}, error) {
+		p := req.(*TaskResultRequest)
+		return s.TaskResult(ctx, p)
+	}
+}

gen/task/service.go

@@ -15,6 +15,8 @@ import (
 type Service interface {
 	// Create a task and put it in a queue for execution.
 	Create(context.Context, *CreateRequest) (res *CreateResult, err error)
+	// TaskResult retrieves task result from the Cache service.
+	TaskResult(context.Context, *TaskResultRequest) (res interface{}, err error)
 }
 
 // ServiceName is the name of the service as defined in the design. This is the
@@ -25,7 +27,7 @@ const ServiceName = "task"
 // MethodNames lists the service method names as defined in the design. These
 // are the same values that are set in the endpoint request contexts under the
 // MethodKey key.
-var MethodNames = [1]string{"Create"}
+var MethodNames = [2]string{"Create", "TaskResult"}
 
 // CreateRequest is the payload type of the task service Create method.
 type CreateRequest struct {
@@ -44,3 +46,9 @@ type CreateResult struct {
 	// Unique task identifier.
 	TaskID string
 }
+
+// TaskResultRequest is the payload type of the task service TaskResult method.
+type TaskResultRequest struct {
+	// Unique task identifier.
+	TaskID string
+}

go.mod

@@ -7,6 +7,7 @@ require (
 	github.com/cenkalti/backoff/v4 v4.1.3
 	github.com/google/uuid v1.3.0
 	github.com/kelseyhightower/envconfig v1.4.0
+	github.com/stretchr/testify v1.7.0
 	go.mongodb.org/mongo-driver v1.8.4
 	go.uber.org/zap v1.21.0
 	goa.design/goa/v3 v3.7.0
@@ -14,6 +15,7 @@ require (
 )
 
 require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dimfeld/httppath v0.0.0-20170720192232-ee938bf73598 // indirect
 	github.com/dimfeld/httptreemux/v5 v5.4.0 // indirect
 	github.com/go-stack/stack v1.8.0 // indirect
@@ -25,6 +27,7 @@ require (
 	github.com/klauspost/compress v1.13.6 // indirect
 	github.com/manveru/faker v0.0.0-20171103152722-9fbc68a78c4d // indirect
 	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/sergi/go-diff v1.2.0 // indirect
 	github.com/smartystreets/assertions v1.2.1 // indirect
 	github.com/xdg-go/pbkdf2 v1.0.0 // indirect
@@ -41,4 +44,5 @@ require (
 	golang.org/x/tools v0.1.10 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 )