Add ListSchedulerEntries API endpoint

scheduler_entry_handlers.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/hibiken/asynq"
+)
+
+// ****************************************************************************
+// This file defines:
+//   - http.Handler(s) for scheduler entry related endpoints
+// ****************************************************************************
+
+func newListSchedulerEntriesHandlerFunc(inspector *asynq.Inspector) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		entries, err := inspector.SchedulerEntries()
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		payload := make(map[string]interface{})
+		if len(entries) == 0 {
+			// avoid nil for the entries field in json output.
+			payload["entries"] = make([]*SchedulerEntry, 0)
+		} else {
+			payload["entries"] = toSchedulerEntries(entries)
+		}
+		json.NewEncoder(w).Encode(payload)
+	}
+}