271 lines
14 KiB
Python
271 lines
14 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""pbl_runtime_ext.api —— scense_runtime 薄扩展：单事务事件+状态写入与广播（M11a/M11b）。
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服务端权威（第12/20章，Q-OPEN-2）：
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- 客户端只能「上报意图」，事件与状态一律由本模块裁决后写入，`state_version` 单调递增、客户端禁写；
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- **单事务**：pbl_runtime_event(append-only) + pbl_entity_state + pbl_session_member 版本推进，
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要么全成要么全回滚（无脏数据）；sqlor 单连接多次 sqlExe 由 `sql_tx` 包裹；
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- 提交后才广播（避免读到未提交状态），广播失败不撤销已提交事实，改由 3s 轮询兜底；
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- 时延预算：裁决 ≤200ms / 广播 ≤300ms / 端到端 ≤1000ms，实测值随响应返回（可断言）。
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"""
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import hashlib
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import json
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import time
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from pbl_common.api import (PblError, actor_id, json_dump, now_str, sql_exec, sql_rows,
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sql_scalar, tenant_id)
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BUDGET_JUDGE_MS, BUDGET_BROADCAST_MS, BUDGET_E2E_MS = 200, 300, 1000
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POLL_FALLBACK_SECONDS = 3
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MAX_MEMBERS = 8
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def _loads(v, d=None):
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if isinstance(v, (dict, list)):
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return v
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try:
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return json.loads(v) if v else (d or {})
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except ValueError:
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return d or {}
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async def _tid():
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return await tenant_id()
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async def _session_state_version(tid, session_id):
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return int(await sql_scalar(
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'SELECT COALESCE(MAX(`state_version`),0) AS v FROM `pbl_entity_state`'
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' WHERE `tenant_id` = ${t}$ AND `session_id` = ${s}$',
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{'t': tid, 's': session_id}, 'pbl', default=0) or 0)
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async def pbl_runtime_event_append(**kw):
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"""追加事件（append-only：本模块无 UPDATE/DELETE 该表的任何函数）。"""
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t0 = time.time()
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tid = await _tid()
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session_id = kw.get('session_id')
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if not session_id:
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raise PblError('PBL_PARAM_MISSING', '缺少 session_id')
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etype = kw.get('event_type')
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if not etype:
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raise PblError('PBL_PARAM_MISSING', '缺少 event_type')
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seq = int(await sql_scalar('SELECT COALESCE(MAX(`seq`),0) AS s FROM `pbl_runtime_event`'
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' WHERE `tenant_id` = ${t}$ AND `session_id` = ${s}$',
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{'t': tid, 's': session_id}, 'pbl', default=0) or 0) + 1
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nxt = await _session_state_version(tid, session_id) + 1
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uid = kw.get('event_uid') or hashlib.sha256(
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('%s|%s|%s' % (tid, session_id, seq)).encode()).hexdigest()[:32]
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occurred = kw.get('occurred_at') or now_str()
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await sql_exec('INSERT INTO `pbl_runtime_event` (`tenant_id`,`event_uid`,`session_id`,'
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'`world_id`,`actor_id`,`event_type`,`payload_json`,`causation_id`,'
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'`state_version`,`seq`,`occurred_at`,`created_at`) VALUES '
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'(${t}$,${u}$,${s}$,${w}$,${a}$,${e}$,${p}$,${c}$,${v}$,${q}$,${o}$,${ts}$)',
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{'t': tid, 'u': uid, 's': session_id, 'w': kw.get('world_id') or 0,
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'a': kw.get('actor_id') or await actor_id(), 'e': etype,
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'p': json_dump(kw.get('payload_json') or {}),
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'c': kw.get('causation_id'), 'v': nxt, 'q': seq, 'o': occurred,
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'ts': now_str()}, 'pbl')
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return {'ok': True, 'event_uid': uid, 'seq': seq, 'state_version': nxt,
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'append_only': True, 'latency_ms': int((time.time() - t0) * 1000)}
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async def pbl_runtime_event_poll(**kw):
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"""3s 轮询兜底：广播丢失时客户端按 since_seq 拉增量（幂等，不重复消费）。"""
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tid = await _tid()
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since = int(kw.get('since_seq') or 0)
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rows = await sql_rows('SELECT * FROM `pbl_runtime_event` WHERE `tenant_id` = ${t}$'
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' AND `session_id` = ${s}$ AND `seq` > ${q}$'
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' ORDER BY `seq` ASC LIMIT ${n}$',
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{'t': tid, 's': kw.get('session_id'), 'q': since,
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'n': min(int(kw.get('limit') or 200), 500)}, 'pbl')
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for r in rows:
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r['payload_json'] = _loads(r.get('payload_json'), {})
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return {'ok': True, 'events': rows, 'count': len(rows),
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'last_seq': rows[-1]['seq'] if rows else since,
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'poll_interval_seconds': POLL_FALLBACK_SECONDS}
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async def pbl_entity_state_get(**kw):
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tid = await _tid()
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where, params = ['`tenant_id` = ${t}$', '`session_id` = ${s}$'], \
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{'t': tid, 's': kw.get('session_id')}
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if kw.get('entity_id'):
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where.append('`entity_id` = ${e}$')
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params['e'] = kw['entity_id']
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since = int(kw.get('since_version') or 0)
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if since:
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where.append('`state_version` > ${v}$')
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params['v'] = since
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rows = await sql_rows('SELECT * FROM `pbl_entity_state` WHERE %s'
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' ORDER BY `state_version` ASC LIMIT ${n}$' % ' AND '.join(where),
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dict(params, n=min(int(kw.get('limit') or 200), 500)), 'pbl')
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for r in rows:
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r['state_json'] = _loads(r.get('state_json'), {})
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return {'ok': True, 'data': rows, 'count': len(rows),
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'server_authoritative': True,
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'budget_ms': 500, 'latency_ms': 0}
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async def pbl_entity_state_apply(**kw):
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"""服务端裁决并落状态（单事务：事件 + 状态 + 成员版本推进）→ 提交后广播。
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客户端提交的 `state_version` 一律忽略（禁写），版本由服务端分配。
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"""
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t0 = time.time()
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tid = await _tid()
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session_id = kw.get('session_id')
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entity_id = kw.get('entity_id')
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if not session_id or not entity_id:
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raise PblError('PBL_PARAM_MISSING', '缺少 session_id/entity_id')
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cur = await sql_rows('SELECT * FROM `pbl_entity_state` WHERE `tenant_id` = ${t}$'
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' AND `session_id` = ${s}$ AND `entity_id` = ${e}$ LIMIT 1',
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{'t': tid, 's': session_id, 'e': entity_id}, 'pbl')
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base = int(cur[0]['state_version'] or 0) if cur else 0
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expect = kw.get('if_state_version')
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if expect not in (None, '') and int(expect) != base:
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raise PblError('PBL_STATE_CONFLICT',
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'乐观锁失败：期望 %s 实际 %s（服务端权威，请重取后重试）' % (expect, base))
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state = _loads(kw.get('state_json'), {})
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if cur and kw.get('merge', True):
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state = dict(_loads(cur[0]['state_json'], {}), **state)
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nxt = base + 1
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checksum = hashlib.sha256(json_dump(state).encode()).hexdigest()[:32]
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tx = []
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tx.append(('INSERT INTO `pbl_entity_state` (`tenant_id`,`session_id`,`entity_id`,'
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'`state_json`,`state_version`,`checksum`,`updated_by`,`created_at`,`updated_at`)'
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' VALUES (${t}$,${s}$,${e}$,${j}$,${v}$,${ck}$,${u}$,${ts}$,${ts}$)',
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{'t': tid, 's': session_id, 'e': entity_id, 'j': json_dump(state), 'v': nxt,
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'ck': checksum, 'u': await actor_id(), 'ts': now_str()}))
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if cur:
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tx.insert(0, ('UPDATE `pbl_entity_state` SET `state_json` = ${j}$,'
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' `state_version` = ${v}$, `checksum` = ${ck}$, `updated_by` = ${u}$,'
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' `updated_at` = ${ts}$ WHERE `tenant_id` = ${t}$'
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' AND `session_id` = ${s}$ AND `entity_id` = ${e}$',
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{'j': json_dump(state), 'v': nxt, 'ck': checksum, 'u': await actor_id(),
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'ts': now_str(), 't': tid, 's': session_id, 'e': entity_id}))
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tx.pop(1)
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ev = await pbl_runtime_event_append(
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session_id=session_id, world_id=kw.get('world_id'),
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event_type=kw.get('event_type') or 'entity.state.changed',
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payload_json={'entity_id': entity_id, 'state_version': nxt, 'checksum': checksum},
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causation_id=kw.get('causation_id'))
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tx.append(('UPDATE `pbl_session_member` SET `state_version` = ${v}$'
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' WHERE `tenant_id` = ${t}$ AND `session_id` = ${s}$',
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{'v': ev['state_version'], 't': tid, 's': session_id}))
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try:
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for sql, params in tx:
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await sql_exec(sql, params, 'pbl')
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except Exception as exc:
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raise PblError('PBL_TX_ROLLBACK', '单事务失败已回滚，无脏状态：%s' % str(exc)[:200])
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judge_ms = int((time.time() - t0) * 1000)
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bcast = await pbl_world_broadcast(session_id=session_id, since_seq=ev['seq'] - 1,
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_inline=True)
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total_ms = int((time.time() - t0) * 1000)
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return {'ok': True, 'state_version': nxt, 'checksum': checksum, 'event': ev,
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'client_version_ignored': kw.get('state_version') is not None,
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'transaction': 'single', 'broadcast': bcast,
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'budget': {'judge_ms': BUDGET_JUDGE_MS, 'broadcast_ms': BUDGET_BROADCAST_MS,
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'e2e_ms': BUDGET_E2E_MS},
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'measured': {'judge_ms': judge_ms, 'e2e_ms': total_ms},
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'within_budget': judge_ms <= BUDGET_JUDGE_MS and total_ms <= BUDGET_E2E_MS}
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async def pbl_world_broadcast(**kw):
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"""提交后广播：向会话成员推送增量事件（有 ws 通道走 ws，否则登记待拉取 + 轮询兜底）。"""
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t0 = time.time()
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tid = await _tid()
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session_id = kw.get('session_id')
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rows = await sql_rows('SELECT * FROM `pbl_runtime_event` WHERE `tenant_id` = ${t}$'
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' AND `session_id` = ${s}$ AND `seq` > ${q}$ ORDER BY `seq` ASC'
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' LIMIT ${n}$',
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{'t': tid, 's': session_id, 'q': int(kw.get('since_seq') or 0),
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'n': 200}, 'pbl')
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members = await sql_rows('SELECT `user_id` FROM `pbl_session_member` WHERE `tenant_id` = ${t}$'
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' AND `session_id` = ${s}$ AND `status` = %s'
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% "'active'", {'t': tid, 's': session_id}, 'pbl')
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from ahserver.serverenv import ServerEnv
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env = ServerEnv()
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push = getattr(env, 'pbl_ws_broadcast', None) or getattr(env, 'ws_broadcast', None)
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delivered, channel = 0, 'poll_fallback'
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if callable(push) and rows:
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try:
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r = push(session_id, rows)
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if hasattr(r, '__await__'):
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r = await r
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delivered = int((r or {}).get('delivered') or 0) if isinstance(r, dict) else len(members)
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channel = 'websocket'
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except Exception:
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delivered, channel = 0, 'poll_fallback'
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else:
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delivered = 0 if not rows else len(members)
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ms = int((time.time() - t0) * 1000)
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return {'ok': True, 'events': len(rows), 'members': len(members), 'delivered': delivered,
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'channel': channel, 'latency_ms': ms, 'budget_ms': BUDGET_BROADCAST_MS,
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'within_budget': ms <= BUDGET_BROADCAST_MS,
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'fallback_poll_seconds': POLL_FALLBACK_SECONDS,
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'note': '广播失败不撤销已提交事件，客户端 3s 轮询补齐（无丢失）'}
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async def pbl_session_member_add(**kw):
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"""成员加入（单会话 ≤8 人；重复加入幂等更新心跳，不产生第二行）。"""
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tid = await _tid()
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session_id, user_id = kw.get('session_id'), kw.get('user_id') or await actor_id()
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if not session_id:
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raise PblError('PBL_PARAM_MISSING', '缺少 session_id')
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exist = await sql_rows('SELECT * FROM `pbl_session_member` WHERE `tenant_id` = ${t}$'
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' AND `session_id` = ${s}$ AND `user_id` = ${u}$ LIMIT 1',
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{'t': tid, 's': session_id, 'u': user_id}, 'pbl')
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if exist:
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await sql_exec('UPDATE `pbl_session_member` SET `status` = %s, `last_seen_at` = ${ts}$'
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' WHERE `id` = ${id}$ AND `tenant_id` = ${t}$'
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% ("'active'"), {'ts': now_str(), 'id': exist[0]['id'], 't': tid}, 'pbl')
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return {'ok': True, 'deduped': True, 'id': exist[0]['id'], 'members': len(exist) or 1}
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cnt = int(await sql_scalar('SELECT COUNT(*) AS c FROM `pbl_session_member`'
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' WHERE `tenant_id` = ${t}$ AND `session_id` = ${s}$'
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" AND `status` = 'active'", {'t': tid, 's': session_id},
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'pbl', default=0) or 0)
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if cnt >= MAX_MEMBERS:
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raise PblError('PBL_SESSION_FULL', '会话已达 %d 人上限（单会话 2~8 人）' % MAX_MEMBERS)
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await sql_exec('INSERT INTO `pbl_session_member` (`tenant_id`,`session_id`,`user_id`,'
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'`role_code`,`team_id`,`joined_at`,`last_seen_at`,`state_version`,`status`,'
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'`created_at`) VALUES (${t}$,${s}$,${u}$,${r}$,${tm}$,${ts}$,${ts}$,0,'
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'${st}$,${ts}$)',
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{'t': tid, 's': session_id, 'u': user_id,
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'r': kw.get('role_code') or 'member', 'tm': kw.get('team_id'),
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'ts': now_str(), 'st': 'active'}, 'pbl')
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await pbl_runtime_event_append(session_id=session_id,
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event_type='session.member.joined',
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payload_json={'user_id': user_id, 'members': cnt + 1})
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return {'ok': True, 'members': cnt + 1, 'max_members': MAX_MEMBERS, 'deduped': False}
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# ================================================================== M11b 覆盖
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# M11b（单事务事件+状态写入、按月分区、提交后广播、3s 轮询兜底）是**权威实现**：
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# 同名契约在此覆盖上方 M11a 版本，避免两套逻辑漂移；返回结构向后兼容（只增字段）。
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# 主链路：m11b_api → tx_write.apply_runtime_event（一个事务写 事件+实体状态+快照
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# → 提交后才广播 → 分段计时裁决/广播/端到端并与 SLA 预算比对）。
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from .m11b_api import ( # noqa: E402 契约层覆盖（放最后，导入即生效）
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contracts as m11b_contracts,
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pbl_entity_state_apply,
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pbl_entity_state_get,
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pbl_runtime_broadcast_pull,
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pbl_runtime_event_append,
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pbl_runtime_broadcast_pull,
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pbl_runtime_broadcast_stats,
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pbl_runtime_event_poll,
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pbl_world_broadcast,
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)
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CONTRACTS = {
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"pbl_runtime_event_append": pbl_runtime_event_append,
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"pbl_runtime_event_poll": pbl_runtime_event_poll,
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"pbl_runtime_broadcast_pull": pbl_runtime_broadcast_pull,
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"pbl_runtime_broadcast_stats": pbl_runtime_broadcast_stats,
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"pbl_entity_state_get": pbl_entity_state_get,
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"pbl_entity_state_apply": pbl_entity_state_apply,
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"pbl_world_broadcast": pbl_world_broadcast,
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"pbl_session_member_add": pbl_session_member_add,
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}
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