import asyncio import json import logging import time from typing import Optional, Any, Dict, Tuple from aiohttp import web from .database import QueueDatabase class PersistentQueueManager: def __init__(self): self.db = QueueDatabase() self.paused = False self.current_job = None self._installed = False self._original_send_sync = None self._original_queue_get = None self._original_task_done = None def initialize(self): """Install hooks and API routes after PromptServer is created.""" if self._installed: return # Import here to avoid circular dependencies from server import PromptServer import execution server_instance = PromptServer.instance # Register on-prompt handler to persist incoming prompts server_instance.add_on_prompt_handler(self._on_prompt) # Monkey-patch PromptQueue.get to support pause and mark jobs running if self._original_queue_get is None: self._original_queue_get = execution.PromptQueue.get def get_wrapper(q_self, timeout=None): if self.paused: time.sleep(0.1) return None result = self._original_queue_get(q_self, timeout=timeout) if result is not None: try: item, item_id = result # item: (number, prompt_id, prompt, extra_data, outputs_to_execute) prompt_id = item[1] self.db.update_job_status(prompt_id, 'running') except Exception as e: logging.debug(f"PersistentQueue get_wrapper mark running failed: {e}") return result execution.PromptQueue.get = get_wrapper # Monkey-patch PromptQueue.task_done to persist results/history if self._original_task_done is None: self._original_task_done = execution.PromptQueue.task_done def task_done_wrapper(q_self, item_id, history_result, status): # Capture before original pops it item = q_self.currently_running.get(item_id) self._original_task_done(q_self, item_id, history_result, status) try: if item is not None: prompt_id = item[1] prompt = item[2] status_str = status.status_str if status is not None else 'success' completed = (status.completed if status is not None else True) new_state = 'completed' if completed else 'failed' self.db.update_job_status(prompt_id, new_state, error=None if completed else status_str) self.db.add_history( prompt_id=prompt_id, workflow=prompt, outputs=history_result.get('outputs', {}), status=status_str, duration_seconds=None, ) except Exception as e: logging.debug(f"PersistentQueue task_done wrapper persist failed: {e}") execution.PromptQueue.task_done = task_done_wrapper # Add API routes self._install_api_routes() # Restore pending jobs on startup self._schedule_restore_pending_jobs() self._installed = True def _on_prompt(self, json_data: Dict[str, Any]) -> Dict[str, Any]: try: if "prompt" in json_data: prompt = json_data["prompt"] prompt_id = str(json_data.get("prompt_id")) if json_data.get("prompt_id") else None if prompt_id is None: import uuid prompt_id = uuid.uuid4().hex json_data["prompt_id"] = prompt_id # Priority scaffold (0 default) priority = 0 self.db.add_job(prompt_id, prompt, priority=priority) except Exception as e: logging.debug(f"PersistentQueue on_prompt persist failed: {e}") return json_data def pause_queue(self): """Pause queue execution""" self.paused = True def resume_queue(self): """Resume queue execution""" self.paused = False def reorder_job(self, prompt_id: str, new_priority: int): """Change job priority""" self.db.update_job_priority(prompt_id, new_priority) def _schedule_restore_pending_jobs(self): try: from server import PromptServer loop = PromptServer.instance.loop loop.create_task(self._restore_pending_jobs_async()) except Exception as e: logging.debug(f"PersistentQueue schedule restore failed: {e}") async def _restore_pending_jobs_async(self): from server import PromptServer import execution server_instance = PromptServer.instance pending_jobs = self.db.get_pending_jobs() for job in pending_jobs: try: prompt_id = job["prompt_id"] workflow_json = job["workflow"] prompt = json.loads(workflow_json) if isinstance(workflow_json, str) else workflow_json valid, err, outputs_to_execute, node_errors = await execution.validate_prompt(prompt_id, prompt, None) if valid: number = server_instance.number server_instance.number += 1 extra_data = {} server_instance.prompt_queue.put((number, prompt_id, prompt, extra_data, outputs_to_execute)) else: self.db.update_job_status(prompt_id, 'failed', error=(err or {}).get('message') if isinstance(err, dict) else str(err)) except Exception as e: logging.debug(f"PersistentQueue restore job failed: {e}") # API Routes async def _api_get_pqueue(self, request: web.Request) -> web.Response: from server import PromptServer running, queued = PromptServer.instance.prompt_queue.get_current_queue_volatile() return web.json_response({ "paused": self.paused, "db_pending": self.db.get_pending_jobs(), "queue_running": running, "queue_pending": queued, }) async def _api_get_history(self, request: web.Request) -> web.Response: limit = int(request.rel_url.query.get("limit", "50")) return web.json_response({"history": self.db.list_history(limit=limit)}) async def _api_pause(self, request: web.Request) -> web.Response: self.pause_queue() return web.json_response({"paused": True}) async def _api_resume(self, request: web.Request) -> web.Response: self.resume_queue() return web.json_response({"paused": False}) def _install_api_routes(self): try: from server import PromptServer app = PromptServer.instance.app app.add_routes([ web.get('/api/pqueue', self._api_get_pqueue), web.get('/api/pqueue/history', self._api_get_history), web.post('/api/pqueue/pause', self._api_pause), web.post('/api/pqueue/resume', self._api_resume), ]) except Exception as e: logging.debug(f"PersistentQueue add routes failed: {e}") queue_manager = PersistentQueueManager()