Fix signal queue

gql_test.go

@@ -10,10 +10,11 @@ import (
   "net"
   "crypto/tls"
   "bytes"
+  "github.com/google/uuid"
 )
 
 func TestGQL(t *testing.T) {
-  ctx := logTestContext(t, []string{"test", "gql", "policy"})
+  ctx := logTestContext(t, []string{"node", "test", "gql", "policy"})
 
   TestNodeType := NodeType("TEST")
   err := ctx.RegisterNodeType(TestNodeType, []ExtType{LockableExtType, ACLExtType})
@@ -23,18 +24,14 @@ func TestGQL(t *testing.T) {
   fatalErr(t, err)
   listener_ext := NewListenerExt(10)
   policy := NewAllNodesPolicy(Actions{MakeAction("+")})
-  gql := NewNode(ctx, nil, GQLNodeType, 10, nil, NewLockableExt(), NewACLExt(policy), gql_ext, NewGroupExt(nil))
+  gql := NewNode(ctx, nil, GQLNodeType, 10, []QueuedSignal{
-  n1 := NewNode(ctx, nil, TestNodeType, 10, nil, NewLockableExt(), NewACLExt(policy), listener_ext)
+    QueuedSignal{uuid.New(), StateSignal{NewDirectSignal(GQLStateSignalType), "start_server"}, time.Now()},
+  }, NewLockableExt(), NewACLExt(policy), gql_ext, NewGroupExt(nil), listener_ext)
+  n1 := NewNode(ctx, nil, TestNodeType, 10, nil, NewLockableExt(), NewACLExt(policy))
 
   err = LinkRequirement(ctx, gql.ID, n1.ID)
   fatalErr(t, err)
 
-  _, err = WaitForSignal(ctx, listener_ext, time.Millisecond*10, LinkSignalType, func(sig StateSignal) bool {
-    return sig.State == "linked_as_dep"
-  })
-  fatalErr(t, err)
-
-  ctx.Send(n1.ID, gql.ID, StateSignal{NewDirectSignal(GQLStateSignalType), "start_server"})
   _, err = WaitForSignal(ctx, listener_ext, 100*time.Millisecond, GQLStateSignalType, func(sig StateSignal) bool {
     return sig.State == "server_started"
   })

node.go

@@ -94,8 +94,9 @@ type Extension interface {
 
 // A QueuedSignal is a Signal that has been Queued to trigger at a set time
 type QueuedSignal struct {
-  Signal Signal
+  uuid.UUID
-  Time time.Time
+  Signal
+  time.Time
 }
 
 // Default message channel size for nodes
@@ -119,9 +120,11 @@ type Node struct {
   NextSignal *QueuedSignal
 }
 
-func (node *Node) QueueSignal(time time.Time, signal Signal) {
+func (node *Node) QueueSignal(time time.Time, signal Signal) uuid.UUID {
-  node.SignalQueue = append(node.SignalQueue, QueuedSignal{signal, time})
+  id := uuid.New()
+  node.SignalQueue = append(node.SignalQueue, QueuedSignal{id, signal, time})
   node.NextSignal, node.TimeoutChan = SoonestSignal(node.SignalQueue)
+  return id
 }
 
 func (node *Node) ClearSignalQueue() {
@@ -204,6 +207,20 @@ func nodeLoop(ctx *Context, node *Node) error {
     case <-node.TimeoutChan:
       signal = node.NextSignal.Signal
       source = node.ID
+      i := -1
+      for j, queued := range(node.SignalQueue) {
+        if queued.UUID == node.NextSignal.UUID {
+          i = j
+          break
+        }
+      }
+      if i == -1 {
+        panic("node.NextSignal not in node.SignalQueue")
+      }
+      l := len(node.SignalQueue)
+      node.SignalQueue[i] = node.SignalQueue[l-1]
+      node.SignalQueue = node.SignalQueue[:(l-1)]
+
       node.NextSignal, node.TimeoutChan = SoonestSignal(node.SignalQueue)
       ctx.Log.Logf("node", "NODE_TIMEOUT %s - NEXT_SIGNAL: %s", node.ID, signal)
     }