{"id":33938,"date":"2023-06-13T21:53:17","date_gmt":"2023-03-29T19:04:22","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bb%a5%e4%b8%8b%e6%98%af%e3%80%90rails%e3%80%91%e5%ae%9e%e7%8e%b0%e9%87%8d%e5%a4%8d%e5%a4%84%e7%90%86%e9%98%b2%e6%ad%a2%e5%8a%9f%e8%83%bd%e7%9a%84%e7%a4%ba%e4%be%8b%e3%80%82\/"},"modified":"2024-04-30T08:45:10","modified_gmt":"2024-04-30T00:45:10","slug":"%e4%bb%a5%e4%b8%8b%e6%98%af%e3%80%90rails%e3%80%91%e5%ae%9e%e7%8e%b0%e9%87%8d%e5%a4%8d%e5%a4%84%e7%90%86%e9%98%b2%e6%ad%a2%e5%8a%9f%e8%83%bd%e7%9a%84%e7%a4%ba%e4%be%8b%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bb%a5%e4%b8%8b%e6%98%af%e3%80%90rails%e3%80%91%e5%ae%9e%e7%8e%b0%e9%87%8d%e5%a4%8d%e5%a4%84%e7%90%86%e9%98%b2%e6%ad%a2%e5%8a%9f%e8%83%bd%e7%9a%84%e7%a4%ba%e4%be%8b%e3%80%82\/","title":{"rendered":"\u4ee5\u4e0b\u662f\u3010Rails\u3011\u5b9e\u73b0\u91cd\u590d\u5904\u7406\u9632\u6b62\u529f\u80fd\u7684\u793a\u4f8b"},"content":{"rendered":"

\u4e0d\u5e0c\u671b\u540c\u65f6\u8fd0\u884c\u7684\u65b9\u6cd5\u3002<\/h1>\n
def<\/span> foo<\/span>\r\n\tAggregateTablesService<\/span>.<\/span>new<\/span>.<\/span>call<\/span> # \u6570\u5341\u4e07\u884c\u306e\u30ec\u30b3\u30fc\u30c9\u306e\u96c6\u8a08\u3092\u884c\u3044\u3001\u5225\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u96c6\u8a08\u3092\u4fdd\u5b58\u3059\u308b\u30b5\u30fc\u30d3\u30b9<\/span>\r\n\t@something<\/span> =<\/span> CreateGraph<\/span>.<\/span>new<\/span>.<\/span>call<\/span> # \u96c6\u8a08\u7d50\u679c\u304b\u3089\u30b0\u30e9\u30d5\u3092\u751f\u307f\u51fa\u3057\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\u3059\u308b\u30b5\u30fc\u30d3\u30b9\u3002\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u3042\u308c\u3070\u305d\u308c\u3092\u8aad\u307f\u8fbc\u3080<\/span>\r\nend<\/span>\r\n<\/code><\/pre>\n
def<\/span> exec<\/span>\r\n\tAggregateTablesService<\/span>.<\/span>new<\/span>.<\/span>call<\/span>\r\n\tCreateGraph<\/span>.<\/span>new<\/span>.<\/span>call<\/span>\r\nend<\/span>\r\n<\/code><\/pre>\n
\u5728\u5904\u7406\u5927\u91cf\u4e14\u590d\u6742\u7684\u8bb0\u5f55\u65f6\uff0c\u6211\u4eec\u9996\u5148\u5c06\u5b83\u4eec\u6c47\u603b\u5230\u805a\u5408\u8868\u4e2d\u4ee5\u4fbf\u4e8e\u5904\u7406\u548c\u52a0\u5feb\u5904\u7406\u901f\u5ea6\uff0c\u7136\u540e\u5728\u6b64\u57fa\u7840\u4e0a\u521b\u5efa\u56fe\u8868\u3002<\/p>\n
\u9996\u5148\uff0c\u9488\u5bf9\u65b9\u6cd5\u91cd\u590d\u8fd0\u884c\u591a\u6b21\u7684\u60c5\u51b5\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528”\u5982\u679c\u5b58\u5728\u8bb0\u5f55\u6216\u7f13\u5b58\uff0c\u5219\u901a\u8fc7return\u9000\u51fa\u5904\u7406”\u8fd9\u79cd\u65b9\u6cd5\u6765\u89e3\u51b3\u3002<\/p>\n
class<\/span> AggregateTablesService<\/span>\r\n\tdef<\/span> call<\/span>\r\n\t\treturn<\/span> if<\/span> SummaryTable<\/span>.<\/span>where<\/span>().<\/span>present?<\/span> # \u3082\u3057\u3059\u3067\u306b\u96c6\u8a08\u3055\u308c\u3066\u3044\u305f\u3089\u51e6\u7406\u3092\u629c\u3051\u308b<\/span>\r\n\r\n\t\t# ~~~\u5177\u4f53\u7684\u306a\u51e6\u7406\u301c\u301c\u301c<\/span>\r\n\tend<\/span>\r\nend<\/span>\r\n<\/code><\/pre>\n
class<\/span> CreateGraph<\/span>\r\n\tdef<\/span> call<\/span>\r\n\t\tcache<\/span> =<\/span> Rails<\/span>.<\/span>cache<\/span>.<\/span>read<\/span>(<\/span>some_key<\/span>)<\/span>\r\n\t\treturn<\/span> cache<\/span> if<\/span> cache<\/span>.<\/span>present?<\/span>\r\n\r\n\t\t# ~~~\u5177\u4f53\u7684\u306a\u51e6\u7406\u301c\u301c\u301c<\/span>\r\n\t\tgraph<\/span> # \u6700\u5f8c\u306b\u30b0\u30e9\u30d5\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059<\/span>\r\n\tend<\/span>\r\nend<\/span>\r\n<\/code><\/pre>\n
\u7136\u800c\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5f53\u540c\u65f6\u6536\u5230\u8bf7\u6c42\u65f6\u4f1a\u51fa\u73b0\u4ee5\u4e0b\u95ee\u9898\uff1a1) \u7b2c\u4e00\u4e2a\u805a\u5408\u4f1a\u88ab\u91cd\u590d\u4fdd\u5b58\uff0c2) \u7b2c\u4e00\u4e2a\u805a\u5408\u4f1a\u4ee5\u4e0d\u5b8c\u6574\u7684\u72b6\u6001\u751f\u6210\u56fe\u8868\u3002<\/p>\n
\u56e0\u6b64\uff0c\u8fd9\u7bc7\u6587\u7ae0\u7684\u91cd\u70b9\u662f\u4e3a\u4e86\u907f\u514d\u63a7\u5236\u5668\u548c\u6279\u5904\u7406\u4e24\u8005\u91cd\u590d\u6267\u884c\u5904\u7406\uff0c\u6211\u4eec\u5c06\u5c1d\u8bd5\u4f7f\u7528\u4fdd\u62a4\u63aa\u65bd\u3002<\/p>\n
\u521b\u5efa\u4e00\u4e2a\u7ba1\u7406\u72b6\u6001\u7684\u5bf9\u8c61<\/h1>\n
\u4f5c\u4e3a\u4e00\u4e2a\u65b9\u9488\uff0c\u6211\u4eec\u5c06\u5728\u5904\u7406\u8fdb\u884c\u4e2d\u65f6\u91c7\u53d6\u76f8\u5e94\u63aa\u65bd\uff0c\u56e0\u6b64\u6211\u4eec\u73b0\u5728\u5c06\u51c6\u5907\u4e00\u4e2a\u5bf9\u8c61\u6765\u7ba1\u7406\u662f\u5426\u6709\u67d0\u4e2a\u4eba\uff08\u5305\u542b\u6279\u5904\u7406\uff09\u6b63\u5728\u6267\u884c\u7a0b\u5e8f\u3002<\/p>\n
class<\/span> ProgressState<\/span>\r\n\tdef<\/span> start<\/span>\r\n\t\tredis<\/span>.<\/span>write<\/span>(<\/span>'in_progress'<\/span>,<\/span> ''<\/span>)<\/span>\r\n\tend<\/span>\r\n\r\n\tdef<\/span> finish<\/span>\r\n\t\tredis<\/span>.<\/span>delete<\/span>(<\/span>'in_progress'<\/span>)<\/span>\r\n\tend<\/span>\r\n\r\n\tdef<\/span> running?<\/span>\r\n\t\tredis<\/span>.<\/span>exists?<\/span>(<\/span>'in_progress'<\/span>)<\/span>\r\n\tend<\/span>\r\n\r\n\tprivate<\/span>\r\n\t\r\n\tdef<\/span> redis<\/span>\r\n\t\tRails<\/span>.<\/span>cache<\/span>\r\n\tend<\/span>\r\n<\/code><\/pre>\n
\u5728\u5f00\u59cb\u5904\u7406\u65f6\uff0c\u5728redis\u4e2d\u4fdd\u5b58\u9002\u5f53\u7684\u7f13\u5b58\uff0c\u5e76\u5728\u6bcf\u6b21\u6267\u884c\u5904\u7406\u4e4b\u524d\u68c0\u67e5redis\u4e2d\u662f\u5426\u5b58\u5728\u7f13\u5b58\uff0c\u8fd9\u6837\u53ef\u4ee5\u9632\u6b62\u5904\u7406\u540c\u65f6\u8fdb\u884c\u3002\u6211\u5c06\u5728\u63a7\u5236\u5668\u548c\u6279\u5904\u7406\u7a0b\u5e8f\u4e2d\u5b9e\u73b0\u8fd9\u4e2a\u529f\u80fd\u3002<\/p>\n
\u9644\u52a0\u8bf4\u660e\uff1a<\/p>\n
\u867d\u7136\u88ab\u79f0\u4e3a\u201cState\u201d\uff0c\u4f46\u5b83\u4e0e\u8bbe\u8ba1\u6a21\u5f0f\u4e2d\u7684\u201cState\u6a21\u5f0f\u201d\u4e0d\u540c\uff0c\u5176\u89d2\u8272\u51e0\u4e4e\u7c7b\u4f3c\u4e8e\u4e00\u4e2a\u4ed3\u5e93\u3002\u7136\u800c\uff0c\u8be5\u5bf9\u8c61\u7684\u4efb\u52a1\u4e0d\u662f\u201c\u6570\u636e\u7684\u8bfb\u5199\u201d\uff0c\u800c\u662f\u7ba1\u7406\u7a0b\u5e8f\u7684\u6267\u884c\u72b6\u6001\uff0c\u56e0\u6b64\u6211\u5c06\u5176\u79f0\u4e3a\u201cProgressState\u201d\uff08\u5982\u679c\u6709\u66f4\u597d\u7684\u547d\u540d\u5efa\u8bae\uff0c\u8bf7\u8bc4\u8bba\uff09\u3002<\/p>\n
\u7b54\u3048\uff1a\u9000\u51fa\u5904\u7406<\/h1>\n
def<\/span> exec<\/span>\r\n\tprogress_state<\/span> =<\/span> ProgressState<\/span>.<\/span>new<\/span>\r\n\treturn<\/span> if<\/span> progress_state<\/span>.<\/span>running?<\/span>\r\n\r\n\tprogress_state<\/span>.<\/span>start<\/span>\r\n\tAggregateTablesService<\/span>.<\/span>new<\/span>.<\/span>call<\/span>\r\n\tCreateGraph<\/span>.<\/span>new<\/span>.<\/span>call<\/span>\r\n\tprogress_state<\/span>.<\/span>finish<\/span>\r\nend<\/span>\r\n<\/code><\/pre>\n
\u5728\u6279\u5904\u7406\u4e2d\uff0c”\u53e6\u4e00\u4e2a\u5904\u7406\u6b63\u5728\u8fdb\u884c\u4e2d”\u7684\u610f\u601d\u662f\u6307\u6b63\u5728\u8fdb\u884c\u6c47\u603b\u548c\u56fe\u8868\u7f13\u5b58\u521b\u5efa\uff0c\u6240\u4ee5\u6211\u4eec\u53ea\u9700\u8981\u7b80\u5355\u5730\u9000\u51fa\u5904\u7406\u3002<\/p>\n
\u63a7\u5236\u5668\uff1a\u8ba9\u5904\u7406\u8fdb\u5165\u7761\u7720\u72b6\u6001\u3002<\/h1>\n
def<\/span> foo<\/span>\r\n\tprogress_state<\/span> =<\/span> ProgressState<\/span>.<\/span>new<\/span>\r\n\tSleepProgressService<\/span>.<\/span>new<\/span>(<\/span>progress_state<\/span>).<\/span>call<\/span>\r\n\r\n\tprogress_state<\/span>.<\/span>start<\/span>\r\n\tAggregateTablesService<\/span>.<\/span>new<\/span>.<\/span>call<\/span>\r\n\t@something<\/span> =<\/span> CreateGraph<\/span>.<\/span>new<\/span>.<\/span>call<\/span>\r\n\tprogress_state<\/span>.<\/span>finish<\/span>\r\nend<\/span>\r\n\r\n<\/code><\/pre>\n
\u5728\u63a7\u5236\u5668\u7aef\uff0c\u6211\u5011\u4e0d\u662f\u60f3\u8981\u7d50\u675f\u8655\u7406\uff0c\u800c\u662f\u5e0c\u671b\u80fd\u5920\u907f\u514d\u91cd\u8907\u8655\u7406\u4e26\u6700\u7d42\u5c07\u5716\u8868\u50b3\u9001\u5230\u5c4f\u5e55\u4e0a\uff0c\u56e0\u6b64\u6211\u5011\u5c07\u63a1\u53d6\u201c\u5982\u679c\u5176\u4ed6\u5730\u65b9\u6b63\u5728\u8655\u7406\uff0c\u5247\u7b49\u5f85\u201d\u7684\u65b9\u6cd5\u3002<\/p>\n
class<\/span> SleepProgressService<\/span>\r\n\tSLEEP_SEC<\/span> =<\/span> 10<\/span>\r\n\tRETRY_COUNT<\/span> =<\/span> 24<\/span>\r\n\r\n\tdef<\/span> initialize<\/span>(<\/span>progress_state<\/span>)<\/span>\r\n\t\t@progress_state<\/span> =<\/span> progress_state<\/span>\r\n\tend<\/span>\r\n\r\n\tdef<\/span> call<\/span>\r\n\t\tcount<\/span> =<\/span> 0<\/span>\r\n\t\tloop<\/span> do<\/span>\r\n\t\t\tif<\/span> @progress_state<\/span>.<\/span>running?<\/span>\r\n\t\t\t\tbreak<\/span> if<\/span> count<\/span> ><\/span> RETRY_COUNT<\/span>\r\n\r\n\t\t\t\tcount<\/span> +=<\/span> 1<\/span>\r\n\t\t\t\tRails<\/span>.<\/span>logger<\/span>.<\/span>info<\/span>(<\/span>\"\u4e3b\u8981\u6307\u6a19\uff1a\u5225\u306e\u96c6\u8a08\u51e6\u7406\u304c\u5b9f\u884c\u4e2d\u306e\u305f\u3081\u30b9\u30ea\u30fc\u30d7\u3057\u307e\u3057\u305f\u3002\u30b9\u30ea\u30fc\u30d7\u56de\u6570\uff1a<\/span>#{<\/span>count<\/span>}<\/span>\u56de\u76ee\"<\/span>)<\/span>\r\n\t\t\t\tsleep<\/span> SLEEP_SEC<\/span>\r\n\t\t\telse<\/span>\r\n\t\t\t\tbreak<\/span>\r\n\t\t\tend<\/span>\r\n\t\tend<\/span>\r\n\tend<\/span>\r\nend<\/span>\r\n\r\n<\/code><\/pre>\n
\u95ee\u9898\uff1a\u4e00\u65e6\u7f13\u5b58\u52a0\u8f7d\u4e86\u6570\u636e\uff0c\u5728redis\u4e2d\u5220\u9664\u6570\u636e\u540e\uff0cRails\u4ecd\u7136\u6301\u7eed\u5730\u8bf4\u201c\u7f13\u5b58\u5b58\u5728\u201d\u3002<\/h1>\n
\u8ba9\u6211\u4eec\u5c1d\u8bd5\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\u5b9e\u9645\u540c\u65f6\u8fd0\u884c\u7a0b\u5e8f\u3002\u6211\u4eec\u4f1a\u540c\u65f6\u51fb\u6253\u63a7\u5236\u5668\u4e24\u6b21\u3002\u7ed3\u679c\u662f\uff0c\u4e00\u65b9\u9762\u7684\u5c4f\u5e55\u663e\u793a\u4e86\u805a\u5408\u548c\u56fe\u5f62\u521b\u5efa\u7684\u7ed3\u675f\uff0c\u5e76\u4e14\u5c4f\u5e55\u5df2\u663e\u793a\uff0c\u5c3d\u7ba1\u901a\u8fc7finish\u65b9\u6cd5\uff0credis\u4e2d\u7684in_progress\u7f13\u5b58\u5df2\u88ab\u786e\u5b9e\u5220\u9664\uff0c\u800c\u53e6\u4e00\u65b9\u9762\u7684\u5c4f\u5e55\u4ecd\u7136\u5904\u4e8e\u4f11\u7720\u72b6\u6001\u3002<\/p>\n
\u67e5\u770b\u65e5\u5fd7\u786e\u8ba4\u540e\uff0c\u53d1\u73b0\u5c3d\u7ba1Redis\u7f13\u5b58\u5df2\u88ab\u6e05\u7a7a\uff0c\u4f46\u4ecd\u7136\u53d1\u751f\u4e86@progress_state.running?\u6301\u7eed24\u6b21\u8fd4\u56detrue\u7684\u73b0\u8c61\u3002<\/p>\n
\u6211\u8ba4\u4e3a\u53ef\u80fd\u662fRails\u7aef\u7684redis_cache\u8bbe\u7f6e\u7684\u95ee\u9898\uff0c\u4f46\u901a\u8fc7\u81ea\u5df1\u4f7f\u7528Redis.new\u800c\u4e0d\u4f7f\u7528Rails.cache\u53ef\u4ee5\u907f\u514d\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n
class<\/span> ProgressState<\/span>\r\n\tdef<\/span> initialize<\/span>\r\n\t\tRails<\/span>.<\/span>configuration<\/span>.<\/span>cache_store<\/span>[<\/span>1<\/span>]<\/span>\r\n\t\tredis_host<\/span> =<\/span> config<\/span>[<\/span>:host<\/span>]<\/span>\r\n    redis_port<\/span> =<\/span> config<\/span>[<\/span>:port<\/span>]<\/span>\r\n    redis_db<\/span> =<\/span> config<\/span>[<\/span>:db<\/span>]<\/span>\r\n    @redis<\/span> =<\/span> Redis<\/span>.<\/span>new<\/span>(<\/span>host: <\/span>redis_host<\/span>,<\/span> port: <\/span>redis_port<\/span>,<\/span> db: <\/span>redis_db<\/span>)<\/span>\r\n\tend<\/span>\r\n\r\n\tdef<\/span> start<\/span>\r\n\t\t@redis<\/span>.<\/span>set<\/span>(<\/span>'in_progress'<\/span>,<\/span> ''<\/span>)<\/span>\r\n\tend<\/span>\r\n\r\n\tdef<\/span> finish<\/span>\r\n\t\t@redis<\/span>.<\/span>del<\/span>(<\/span>'in_progress'<\/span>)<\/span>\r\n\tend<\/span>\r\n\r\n\tdef<\/span> running?<\/span>\r\n\t\t@redis<\/span>.<\/span>exists<\/span>(<\/span>'in_progress'<\/span>)<\/span> ==<\/span> 1<\/span> # exists()\u304c0\/1\u306eint\u3067\u8fd4\u5374\u3055\u308c\u308b\u305f\u3081<\/span>\r\n\tend<\/span>\r\n<\/code><\/pre>\n
\u5c3d\u7ba1\u6ca1\u6709\u4ec0\u4e48\u7279\u522b\u503c\u5f97\u4e00\u63d0\u7684\uff0c\u4f46\u5982\u679c\u4e00\u5b9a\u8981\u8bf4\u7684\u8bdd\uff0c\u53ef\u80fd\u662f\u56e0\u4e3a\u4e00\u5f00\u59cb\u5c31\u5c06\u8fdb\u5c55\u72b6\u6001\u5b9a\u4e49\u4e3a\u4e86\u5bf9\u8c61\uff0c\u6240\u4ee5\u53ea\u9700\u5728\u8fd9\u4e2a\u5bf9\u8c61\u4e0a\u8fdb\u884c\u4fee\u6539\u3002<\/p>\n
\u7531\u4e8e\u5e0c\u671b\u80fd\u591f\u91cd\u590d\u4f7f\u7528\u524d\u8ff0\u7684SleepProgressService\uff0c\u6240\u4ee5\u5b83\u5e76\u672a\u4ece\u63a7\u5236\u5668\u4e2d\u5206\u79bb\u51fa\u6765\uff0c\u800c\u662f\u5c3d\u53ef\u80fd\u5730\u9650\u5236\u4e86\u63a7\u5236\u5668\u7684\u8d23\u4efb\u9886\u57df\uff0c\u5e76\u5c06”\u7b49\u5f85\u5904\u7406\u5f00\u59cb”\u8fd9\u4e2a\u8fc7\u7a0b\u9694\u79bb\u5230\u4e86\u8be5\u670d\u52a1\u4e2d\uff0c\u8fd9\u662f\u51fa\u4e8e\u4e00\u79cd\u610f\u56fe\u3002<\/p>\n
\u6700\u540e\u4e00\u70b9<\/h1>\n
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