From 8a973685773e050011a5cce9e92c8be65fc6956e Mon Sep 17 00:00:00 2001
From: admin <erik.vanderboom@mst.nl>
Date: Thu, 6 Nov 2025 14:49:56 +0100
Subject: [PATCH] update

---
 queue_helper.py | 96 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 queue_helper.py

diff --git a/queue_helper.py b/queue_helper.py
new file mode 100644
index 0000000..20caf87
--- /dev/null
+++ b/queue_helper.py
@@ -0,0 +1,96 @@
+# -------------------------------------------------------------
+# queue_helper.py  –  minimalistisch thread‑based wachtrij‑manager
+# -------------------------------------------------------------
+import threading, queue, uuid, time
+from typing import Callable, Any, Dict
+
+# ------------------------------------------------------------------
+# Configuratie – pas eventueel aan
+# ------------------------------------------------------------------
+USER_MAX_QUEUE   = 20   # max. wachtende gebruikers
+AGENT_MAX_QUEUE  = 50   # max. wachtende agents (stil)
+UPDATE_INTERVAL  = 10.0  # sec tussen “position‑update” berichten
+WORKER_TIMEOUT   = 30.0 # max. tijd die een inference mag duren
+# ------------------------------------------------------------------
+
+class _Job:
+    __slots__ = ("job_id","payload","callback","created_at","event","result","error")
+    def __init__(self, payload: Dict, callback: Callable[[Dict], None]):
+        self.job_id   = str(uuid.uuid4())
+        self.payload  = payload
+        self.callback = callback
+        self.created_at = time.time()
+        self.event    = threading.Event()
+        self.result   = None
+        self.error    = None
+    def set_success(self, answer: Dict):
+        self.result = answer
+        self.event.set()
+        self.callback(answer)
+    def set_error(self, exc: Exception):
+        self.error = str(exc)
+        self.event.set()
+        self.callback({"error": self.error})
+
+class QueueManager:
+    """Beheert één gedeelde queue + één worker‑thread."""
+    def __init__(self, model_infer_fn: Callable[[Dict], Dict]):
+        self._infer_fn = model_infer_fn
+        self._user_q  = queue.Queue(maxsize=USER_MAX_QUEUE)
+        self._agent_q = queue.Queue(maxsize=AGENT_MAX_QUEUE)
+        self._shutdown = threading.Event()
+        self._worker   = threading.Thread(target=self._run_worker,
+                                          daemon=True,
+                                          name="LLM‑worker")
+        self._worker.start()
+
+    # ---------- public API ----------
+    def enqueue_user(self, payload: Dict, progress_cb: Callable[[Dict], None]) -> tuple[str, int]:
+        job = _Job(payload, progress_cb)
+        try: self._user_q.put_nowait(job)
+        except queue.Full: raise RuntimeError(f"User‑queue vol (≥{USER_MAX_QUEUE})")
+        position = self._user_q.qsize()
+        return job.job_id, position
+
+    def enqueue_agent(self, payload: Dict, progress_cb: Callable[[Dict], None]) -> str:
+        job = _Job(payload, progress_cb)
+        try: self._agent_q.put_nowait(job)
+        except queue.Full: raise RuntimeError(f"Agent‑queue vol (≥{AGENT_MAX_QUEUE})")
+        return job.job_id
+
+    # ---------- worker ----------
+    def _run_worker(self):
+        while not self._shutdown.is_set():
+            job = self._pop_job(self._user_q) or self._pop_job(self._agent_q)
+            if not job:
+                time.sleep(0.1)
+                continue
+            try:
+                answer = self._infer_fn(job.payload)
+                job.set_success(answer)
+            except Exception as exc:
+                job.set_error(exc)
+
+    def _pop_job(self, q: queue.Queue):
+        try: return q.get_nowait()
+        except queue.Empty: return None
+
+    def stop(self):
+        self._shutdown.set()
+        self._worker.join(timeout=5)
+
+def start_position_notifier(job: _Job,
+                           queue_ref: queue.Queue,
+                           interval: float = UPDATE_INTERVAL):
+    """Stuurt elke `interval` seconden een bericht met de huidige positie."""
+    def _notifier():
+        while not job.event.is_set():
+            try:
+                pos = list(queue_ref.queue).index(job) + 1   # 1‑based
+            except ValueError:
+                break
+            job.callback({"info": f"U bent #{pos} in de wachtrij. Even geduld…" })
+            time.sleep(interval)
+    t = threading.Thread(target=_notifier, daemon=True)
+    t.start()
+    return t