harmonytask: remember machine

lib/harmony/harmonydb/sql/20231113.sql

@@ -0,0 +1 @@
+ALTER TABLE harmony_task_history ADD COLUMN completed_by_host_and_port varchar(300) NOT NULL;

lib/harmony/harmonytask/harmonytask.go

@@ -106,6 +106,7 @@ type TaskEngine struct {
 	follows        map[string][]followStruct
 	lastFollowTime time.Time
 	lastCleanup    atomic.Value
+	hostAndPort    string
 }
 type followStruct struct {
 	f    func(TaskID, AddTaskFunc) (bool, error)
@@ -129,13 +130,14 @@ func New(
 	}
 	ctx, grace := context.WithCancel(context.Background())
 	e := &TaskEngine{
-		ctx:     ctx,
-		grace:   grace,
-		db:      db,
-		reg:     reg,
-		ownerID: reg.Resources.MachineID, // The current number representing "hostAndPort"
-		taskMap: make(map[string]*taskTypeHandler, len(impls)),
-		follows: make(map[string][]followStruct),
+		ctx:         ctx,
+		grace:       grace,
+		db:          db,
+		reg:         reg,
+		ownerID:     reg.Resources.MachineID, // The current number representing "hostAndPort"
+		taskMap:     make(map[string]*taskTypeHandler, len(impls)),
+		follows:     make(map[string][]followStruct),
+		hostAndPort: hostnameAndPort,
 	}
 	e.lastCleanup.Store(time.Now())
 	for _, c := range impls {

lib/harmony/harmonytask/task_type_handler.go

@@ -198,8 +198,8 @@ func (h *taskTypeHandler) recordCompletion(tID TaskID, workStart time.Time, done
 			}
 		}
 		_, err = tx.Exec(`INSERT INTO harmony_task_history 
-												(task_id, name, posted,    work_start, work_end, result, err)
-			 VALUES ($1, $2, $3, $4, $5, $6, $7)`, tID, h.Name, postedTime, workStart, workEnd, done, result)
+									 (task_id,   name, posted,    work_start, work_end, result, by_host_and_port,      err)
+VALUES ($1, $2, $3, $4, $5, $6, $7, $8)`, tID, h.Name, postedTime, workStart, workEnd, done, h.TaskEngine.hostAndPort, result)
 		if err != nil {
 			return false, fmt.Errorf("could not write history: %w", err)
 		}