177 lines
6.6 KiB
Python
177 lines
6.6 KiB
Python
# -*- coding: utf-8 -*-
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"""
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任务执行引擎：后台线程执行单次 LLM 调用，记录日志与成本，
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完成后进入「待审核」或直接「已完成」。
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"""
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import threading
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import traceback
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import db
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import llm_gateway
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import config
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def _log(task_id, level, message):
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try:
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db.w('INSERT INTO task_logs (task_id, level, message, created_at) VALUES (?,?,?,?)',
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(task_id, level, message, db.now()))
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except Exception:
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pass
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def _set_task(task_id, **fields):
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if not fields:
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return
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fields['updated_at'] = db.now()
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sets = ', '.join(f'{k}=?' for k in fields)
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db.w(f'UPDATE tasks SET {sets} WHERE id=?', (*fields.values(), task_id))
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def _cost_record(task, worker, usage):
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db.w(
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'INSERT INTO cost_records (task_id, project_id, worker_id, provider, model, '
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'prompt_tokens, completion_tokens, total_tokens, cost, created_at) '
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'VALUES (?,?,?,?,?,?,?,?,?,?)',
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(task['id'], task['project_id'], worker['id'], worker['provider'],
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worker['model'], usage['prompt_tokens'], usage['completion_tokens'],
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usage['total_tokens'], usage['cost'], db.now()))
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def pick_worker_auto(task):
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"""自动路由：按模型输入单价升序挑选 enabled Worker"""
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rows = db.q('SELECT * FROM workers WHERE status="enabled" ORDER BY id')
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if not rows:
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return None
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best, best_price = None, None
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for r in rows:
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pin, pout = llm_gateway.model_price(r['model'])
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price = pin + pout * 0.5
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if best_price is None or price < best_price:
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best, best_price = r, price
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return best
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def check_worker_limits(worker):
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"""成本上限预检：返回 (ok, reason)"""
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if worker['task_cost_limit'] and worker['task_cost_limit'] > 0:
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used = db.task_worker_cost(worker['id'])
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if used >= worker['task_cost_limit']:
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return False, f'该 Worker 累计成本 {used:.4f} 元已达单任务上限 {worker["task_cost_limit"]} 元'
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if worker['monthly_cost_limit'] and worker['monthly_cost_limit'] > 0:
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used = db.monthly_worker_cost(worker['id'])
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if used >= worker['monthly_cost_limit']:
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return False, f'该 Worker 本月成本 {used:.4f} 元已达月度上限 {worker["monthly_cost_limit"]} 元'
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return True, ''
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def _check_project_budget(task):
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proj = db.q('SELECT * FROM projects WHERE id=?', (task['project_id'],), one=True)
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if proj and proj['budget_limit'] and proj['budget_limit'] > 0:
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rows = db.q('SELECT COALESCE(SUM(cost),0) AS t FROM cost_records WHERE project_id=?',
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(task['project_id'],))
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used = rows[0]['t'] if rows else 0
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if used >= proj['budget_limit']:
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return False, f'项目预算已用完（{used:.2f}/{proj["budget_limit"]:.2f} 元）'
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return True, ''
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def run_task(task_id):
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"""在后台线程中执行任务"""
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task = db.q('SELECT * FROM tasks WHERE id=?', (task_id,), one=True)
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if not task:
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return
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if task['status'] == 'running':
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return
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# 确定 Worker
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worker = None
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if task['worker_id']:
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worker = db.q('SELECT * FROM workers WHERE id=?', (task['worker_id'],), one=True)
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if not worker or worker['status'] != 'enabled':
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_set_task(task_id, status='failed', error='指定 Worker 不存在或已停用',
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finished_at=db.now())
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_log(task_id, 'error', '指定 Worker 不存在或已停用')
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return
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else:
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worker = pick_worker_auto(task)
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if not worker:
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_set_task(task_id, status='failed', error='无可用 Worker（自动路由失败）',
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finished_at=db.now())
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_log(task_id, 'error', '自动路由失败：无可用 Worker')
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return
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_set_task(task_id, worker_id=worker['id'])
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_log(task_id, 'info', f'自动路由 → Worker「{worker["name"]}」（{worker["provider"]}/{worker["model"]}）')
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# 预算/成本预检
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ok, reason = check_worker_limits(worker)
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if not ok:
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_set_task(task_id, status='failed', error=reason, finished_at=db.now())
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_log(task_id, 'error', reason)
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return
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ok, reason = _check_project_budget(task)
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if not ok:
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_set_task(task_id, status='failed', error=reason, finished_at=db.now())
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_log(task_id, 'error', reason)
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return
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_set_task(task_id, status='running', started_at=db.now(), error='')
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_log(task_id, 'info', f'开始执行：Worker「{worker["name"]}」 模型 {worker["provider"]}/{worker["model"]}')
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messages = []
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if worker['system_prompt']:
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messages.append({'role': 'system', 'content': worker['system_prompt']})
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messages.append({'role': 'user', 'content': task['description'] or task['title']})
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try:
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usage = llm_gateway.chat(
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worker['provider'], worker['model'], messages,
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temperature=worker['temperature'], max_tokens=worker['max_tokens'],
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base_url=worker['base_url'] or None, api_key=worker['api_key'] or None)
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except Exception as e:
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_set_task(task_id, status='failed', error=str(e), finished_at=db.now())
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_log(task_id, 'error', f'执行失败: {e}')
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return
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_cost_record(task, worker, usage)
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_log(task_id, 'success',
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f'执行完成：{usage["total_tokens"]} tokens（输入 {usage["prompt_tokens"]} / 输出 {usage["completion_tokens"]}），'
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f'成本 ¥{usage["cost"]:.6f}')
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new_status = 'review' if task['review_required'] else 'done'
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fields = {
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'status': new_status,
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'output_text': usage['text'],
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'output_version': task['output_version'] + 1,
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'finished_at': db.now(),
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}
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_set_task(task_id, **fields)
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if new_status == 'review':
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_log(task_id, 'info', '产出已提交，等待人工审核（HITL）')
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else:
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_log(task_id, 'success', '任务完成（无需审核）')
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class TaskRunner:
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def __init__(self):
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self._threads = {}
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def submit(self, task_id):
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if task_id in self._threads and self._threads[task_id].is_alive():
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return False
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t = threading.Thread(target=self._safe_run, args=(task_id,), daemon=True)
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self._threads[task_id] = t
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t.start()
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return True
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def _safe_run(self, task_id):
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try:
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run_task(task_id)
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except Exception:
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_log(task_id, 'error', '引擎异常: ' + traceback.format_exc())
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try:
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_set_task(task_id, status='failed', error='引擎异常，见日志', finished_at=db.now())
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except Exception:
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pass
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runner = TaskRunner()
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