Updated MessageQueue

context.go

@@ -61,7 +61,7 @@ type ExtensionFieldInfo struct {
 type ExtensionInfo struct {
   ExtType
   Type reflect.Type
-  Fields map[string]ExtensionFieldInfo
+  Fields map[Tag]ExtensionFieldInfo
   Data interface{}
 }
 
@@ -328,13 +328,13 @@ func RegisterExtension[E any, T interface { *E; Extension}](ctx *Context, data i
     return fmt.Errorf("Cannot register extension %+v of type %+v, type already exists in context", reflect_type, ext_type)
   }
 
-  fields := map[string]ExtensionFieldInfo{}
+  fields := map[Tag]ExtensionFieldInfo{}
 
   for _, field := range(reflect.VisibleFields(reflect_type)) {
     gv_tag, tagged_gv := field.Tag.Lookup("gv")
     node_tag := field.Tag.Get("node")
     if tagged_gv {
-      fields[gv_tag] = ExtensionFieldInfo{
+      fields[Tag(gv_tag)] = ExtensionFieldInfo{
         Index: field.Index,
         Type: field.Type,
         NodeTag: node_tag,
@@ -354,7 +354,7 @@ func RegisterExtension[E any, T interface { *E; Extension}](ctx *Context, data i
 
 type FieldMapping struct {
   Extension ExtType
-  Tag string
+  Tag Tag
 }
 
 func RegisterNodeInterface(ctx *Context, name string, fields map[string]graphql.Type) error {
@@ -437,7 +437,6 @@ func RegisterNodeType(ctx *Context, name string, mappings map[string]FieldMappin
     },
   }
 
-  ext_map := map[ExtType]bool{}
   for field_name, mapping := range(mappings) {
     _, duplicate := fields[field_name]
     if duplicate {
@@ -449,7 +448,12 @@ func RegisterNodeType(ctx *Context, name string, mappings map[string]FieldMappin
       return fmt.Errorf("Cannot register node type %s, unknown extension %s", name, mapping.Extension)
     }
 
-    ext_map[mapping.Extension] = true
+    _, exists = reverse_fields[mapping.Extension]
+    if exists == false {
+      reverse_fields[mapping.Extension] = map[Tag]string{}
+    }
+    reverse_fields[mapping.Extension][mapping.Tag] = field_name
+
 
     ext_field, exists := ext_info.Fields[mapping.Tag]
     if exists == false {
@@ -496,7 +500,7 @@ func RegisterNodeType(ctx *Context, name string, mappings map[string]FieldMappin
   })
 
   extensions := []ExtType{}
-  for ext_type := range(ext_map) {
+  for ext_type := range(reverse_fields) {
     extensions = append(extensions, ext_type)
   }
 

message.go

@@ -6,8 +6,8 @@ type Message struct {
 }
 
 type MessageQueue struct {
-  out chan Message
-  in chan Message
+  out chan<- Message
+  in <-chan Message
   buffer []Message
   write_cursor int
   read_cursor int
@@ -34,9 +34,12 @@ func (queue *MessageQueue) ProcessIncoming(message Message) {
 }
 
 func NewMessageQueue(initial int) (chan<- Message, <-chan Message) {
+  in := make(chan Message, 0)
+  out := make(chan Message, 0)
+
   queue := MessageQueue{
-    out: make(chan Message, 0),
-    in: make(chan Message, 0),
+    out: out,
+    in: in,
     buffer: make([]Message, initial),
     write_cursor: 0,
     read_cursor: 0,
@@ -61,5 +64,5 @@ func NewMessageQueue(initial int) (chan<- Message, <-chan Message) {
     }
   }(&queue)
 
-  return queue.in, queue.out
+  return in, out
 }

node.go

@@ -85,6 +85,7 @@ type Node struct {
   // Channel for this node to receive messages from the Context
   SendChan chan<- Message
   RecvChan <-chan Message
+
   // Channel for this node to process delayed signals
   TimeoutChan <-chan time.Time
 
@@ -327,7 +328,10 @@ func (node *Node) QueueChanges(ctx *Context, changes map[ExtType]Changes) error
         }
       }
     }
-    node.QueueSignal(time.Time{}, NewStatusSignal(node.ID, fields))
+    ctx.Log.Logf("changes", "Changes to queue from %+v: %+v", node_info.ReverseFields, fields)
+    if len(fields) > 0 {
+      node.QueueSignal(time.Time{}, NewStatusSignal(node.ID, fields))
+    }
     return nil
   }
 }
@@ -353,6 +357,7 @@ func (node *Node) Process(ctx *Context, source NodeID, signal Signal) error {
   }
 
   if len(changes) != 0 {
+    ctx.Log.Logf("changes", "Changes to %s from %+v: %+v", node.ID, signal, changes)
     status_err := node.QueueChanges(ctx, changes)
     if status_err != nil {
       return status_err