151 lines
5.5 KiB
Python
151 lines
5.5 KiB
Python
from cli.utils import SHELL_TEXT_FORMATTER
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class CacheCommandPresenter:
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"""
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缓存命令文本渲染器。
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该渲染器负责将 `cache` 命令组产生的结构化 payload 转换为稳定的文本摘要，
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同时保持 JSON 输出仍由控制器直接返回，不在此处做契约变形。
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"""
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def build_cache_stats_text(self, payload: dict[str, object]) -> str:
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"""
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将缓存统计结果渲染为文本摘要。
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:param payload: 缓存统计结果
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:return: 文本摘要
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"""
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info = payload.get('info')
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command_stats = payload.get('commandStats')
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cache_names = payload.get('cacheNames')
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redis_version = '-'
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connected_clients = '-'
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used_memory = '-'
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uptime_seconds = '-'
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keyspace_hits = '-'
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keyspace_misses = '-'
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if isinstance(info, dict):
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redis_version = info.get('redis_version', '-')
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connected_clients = info.get('connected_clients', '-')
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used_memory = info.get('used_memory_human', info.get('used_memory', '-'))
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uptime_seconds = info.get('uptime_in_seconds', '-')
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keyspace_hits = info.get('keyspace_hits', '-')
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keyspace_misses = info.get('keyspace_misses', '-')
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lines = [
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f'ok: {str(payload.get("ok", False)).lower()}',
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f'db_size: {payload.get("dbSize", 0)}',
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'redis:',
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f' version: {redis_version}',
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f' connected_clients: {connected_clients}',
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f' used_memory: {used_memory}',
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f' uptime_seconds: {uptime_seconds}',
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f' keyspace_hits: {keyspace_hits}',
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f' keyspace_misses: {keyspace_misses}',
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]
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if isinstance(command_stats, list) and command_stats:
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lines.append('command_stats_top10:')
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lines.extend(
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f' - {item.get("name", "-")}: {item.get("value", 0)}'
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for item in command_stats[:10]
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if isinstance(item, dict)
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)
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else:
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lines.append('command_stats_top10: none')
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if isinstance(cache_names, list) and cache_names:
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lines.append(f'cache_names: {len(cache_names)}')
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lines.append('cache_name_samples:')
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lines.extend(
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f' - {item.get("cacheName", "-")}: {self._build_cache_name_remark(item.get("remark", ""))}'
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for item in cache_names[:10]
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if isinstance(item, dict)
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)
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else:
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lines.append('cache_names: 0')
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return '\n'.join(lines)
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def build_cache_keys_text(self, payload: dict[str, object]) -> str:
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"""
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将缓存键列表结果渲染为文本摘要。
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:param payload: 缓存键列表结果
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:return: 文本摘要
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"""
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keys = payload.get('keys')
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lines = [
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f'ok: {str(payload.get("ok", False)).lower()}',
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f'cache_name: {payload.get("cacheName", "")}',
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f'count: {payload.get("count", 0)}',
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]
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if not isinstance(keys, list) or not keys:
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lines.append('keys: none')
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return '\n'.join(lines)
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lines.append('keys:')
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lines.extend(f' - {key}' for key in keys)
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return '\n'.join(lines)
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def build_cache_value_text(self, payload: dict[str, object]) -> str:
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"""
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将缓存值读取结果渲染为文本摘要。
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:param payload: 缓存值读取结果字典
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:return: 文本摘要
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"""
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cache_value = '' if payload.get('cacheValue') is None else str(payload.get('cacheValue'))
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cache_value_lines = cache_value.splitlines() if cache_value else []
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if not cache_value_lines:
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rendered_value_lines = [' -']
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elif len(cache_value_lines) == 1:
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rendered_value_lines = [f' {SHELL_TEXT_FORMATTER.truncate_text(cache_value_lines[0], 200)}']
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else:
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rendered_value_lines = [' |', *[f' {line}' for line in cache_value_lines]]
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return '\n'.join(
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[
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f'ok: {str(payload.get("ok", False)).lower()}',
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f'cache_name: {payload.get("cacheName", "")}',
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f'cache_key: {payload.get("cacheKey", "")}',
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f'full_cache_key: {payload.get("fullCacheKey", "")}',
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'cache_value:',
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*rendered_value_lines,
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]
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)
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@staticmethod
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def build_cache_ttl_text(payload: dict[str, object]) -> str:
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"""
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将缓存 TTL 结果渲染为文本摘要。
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:param payload: 缓存 TTL 结果字典
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:return: 文本摘要
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"""
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return '\n'.join(
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[
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f'ok: {str(payload.get("ok", False)).lower()}',
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f'cache_name: {payload.get("cacheName", "")}',
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f'cache_key: {payload.get("cacheKey", "")}',
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f'full_cache_key: {payload.get("fullCacheKey", "")}',
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f'message: {payload.get("message", "-")}',
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f'ttl_seconds: {payload.get("ttlSeconds", "-")}',
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f'persistent: {str(payload.get("persistent", False)).lower()}',
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f'expires: {str(payload.get("expires", False)).lower()}',
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]
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)
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@staticmethod
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def _build_cache_name_remark(remark: object) -> str:
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"""
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规范化缓存名称备注文本。
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:param remark: 原始备注
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:return: 规范化后的备注
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"""
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text = '' if remark is None else str(remark).strip()
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return text or '-'
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