Add Annotations field to QueueRequest

- Add an annotations field to pass additional meta-date to the consumers of
  queue requests.
- Add JSON attributes to struct.

Signed-off-by: Han Verstraete (OpenFaaS Ltd) <[email protected]>

types/queue.go

@@ -8,32 +8,36 @@ import (
 // Request for asynchronous processing
 type QueueRequest struct {
 	// Header from HTTP request
-	Header http.Header
+	Header http.Header `json:"Header,omitempty"`
 
 	// Host from HTTP request
-	Host string
+	Host string `json:"Host,omitempty"`
 
 	// Body from HTTP request to use for invocation
-	Body []byte
+	Body []byte `json:"Body,omitempty"`
 
 	// Method from HTTP request
-	Method string
+	Method string `json:"Method"`
 
 	// Path from HTTP request
-	Path string
+	Path string `json:"Path,omitempty"`
 
 	// QueryString from HTTP request
-	QueryString string
+	QueryString string `json:"QueryString,omitempty"`
 
 	// Function name to invoke
-	Function string
+	Function string `json:"Function"`
 
 	// QueueName to publish the request to, leave blank
 	// for default.
-	QueueName string
+	QueueName string `json:"QueueName,omitempty"`
+
+	// Annotations defines a collection of meta-data that can be used by
+	// the queue worker when processing the queued request.
+	Annotations map[string]string `json:"Annotations,omitempty"`
 
 	// Used by queue worker to submit a result
-	CallbackURL *url.URL `json:"CallbackUrl"`
+	CallbackURL *url.URL `json:"CallbackUrl,omitempty"`
 }
 
 // RequestQueuer can public a request to be executed asynchronously