{"id":50513,"date":"2023-10-11T07:00:02","date_gmt":"2024-01-06T13:53:51","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%9d%e8%af%95%e5%9c%a8golang%e4%b8%ad%e6%8c%91%e6%88%98cqrses-%e5%87%86%e5%a4%87%e7%af%87\/"},"modified":"2024-05-04T03:41:30","modified_gmt":"2024-05-03T19:41:30","slug":"%e5%b0%9d%e8%af%95%e5%9c%a8golang%e4%b8%ad%e6%8c%91%e6%88%98cqrses-%e5%87%86%e5%a4%87%e7%af%87","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%9d%e8%af%95%e5%9c%a8golang%e4%b8%ad%e6%8c%91%e6%88%98cqrses-%e5%87%86%e5%a4%87%e7%af%87\/","title":{"rendered":"\u5c1d\u8bd5\u5728Golang\u4e2d\u6311\u6218CQRS+ES – \u51c6\u5907\u7bc7"},"content":{"rendered":"

\u9996\u5148<\/h1>\n

\u6211\u60f3\u77e5\u9053\u5728Go\u8bed\u8a00\u4e2d\u662f\u5426\u53ef\u4ee5\u5b9e\u73b0CQRS+ES\uff1f\u4e8e\u662f\u6211\u4ece\u80fd\u5b9e\u73b0\u7684\u5730\u65b9\u5f00\u59cb\u5c1d\u8bd5\u3002<\/p>\n

\u7531\u4e8e\u8fd9\u53ea\u662f\u4e00\u4e2a\u6311\u6218\uff0c\u6211\u5e0c\u671b\u4e0d\u8981\u8fc7\u4e8e\u4e25\u683c\u5730\u5b9a\u4e49DDD\u548cCQRS\u3002\u7279\u522b\u662f\u5f53\u6d89\u53ca\u5230DDD\u7684\u503c\u5bf9\u8c61\u6216\u8005\u9700\u8981\u8fdb\u884c\u5e8f\u5217\u5316\u65f6\uff0c\u5728Go\u8bed\u8a00\u4e2d\u5728\u9886\u57df\u5185\u8fdb\u884c\u5c01\u88c5\u53ef\u80fd\u4f1a\u611f\u5230\u5f88\u9ebb\u70e6\uff0c\u6240\u4ee5\u6211\u4e0d\u6253\u7b97\u5728\u8fd9\u65b9\u9762\u592a\u8fc7\u52aa\u529b\u3002<\/p>\n

\u51c6\u5907<\/h1>\n

\u9996\u5148\uff0c\u5c07\u4f5c\u70ba\u6e96\u5099\u5171\u540c\u4f7f\u7528\u7684\u7269\u54c1\u6574\u7406\u6210common\u5957\u4ef6\u3002<\/p>\n

\u96c6\u7ea6\u8def\u5f84<\/h2>\n
package<\/span> common<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n    \"sort\"<\/span>\r\n\r\n    \"github.com\/google\/uuid\"<\/span>\r\n    \"github.com\/pkg\/errors\"<\/span>\r\n)<\/span>\r\n\r\ntype<\/span> AggregateContext<\/span> interface<\/span> {<\/span>\r\n    AggregateID<\/span>()<\/span> string<\/span>\r\n    StreamVersion<\/span>()<\/span> int64<\/span>\r\n    SetStreamVersion<\/span>(<\/span>int64<\/span>)<\/span>\r\n    UncommittedEvents<\/span>()<\/span> []<\/span>EventContext<\/span>\r\n    AppendUncommittedEvent<\/span>(<\/span>EventContext<\/span>)<\/span>\r\n    CommitEvent<\/span>(<\/span>EventContext<\/span>)<\/span>\r\n    CommittedEvents<\/span>()<\/span> []<\/span>EventContext<\/span>\r\n    Replay<\/span>([]<\/span>*<\/span>StoredEvent<\/span>)<\/span> error<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> NewAggregateID<\/span>()<\/span> (<\/span>string<\/span>,<\/span> error<\/span>)<\/span> {<\/span>\r\n    id<\/span>,<\/span> err<\/span> :=<\/span> uuid<\/span>.<\/span>NewUUID<\/span>()<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        return<\/span> \"\"<\/span>,<\/span> errors<\/span>.<\/span>Wrap<\/span>(<\/span>err<\/span>,<\/span> \"ID\u306e\u751f\u6210\u306b\u5931\u6557\u3057\u307e\u3057\u305f\"<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    return<\/span> id<\/span>.<\/span>String<\/span>(),<\/span> nil<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> AggregateBase<\/span> struct<\/span> {<\/span>\r\n    aggregateID<\/span>         string<\/span>\r\n    streamVersion<\/span>       int64<\/span>\r\n    uncommittedEventMap<\/span> map<\/span>[<\/span>string<\/span>]<\/span>EventContext<\/span>\r\n    committedEventMap<\/span>   map<\/span>[<\/span>string<\/span>]<\/span>EventContext<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> NewAggregateBase<\/span>(<\/span>aggregateID<\/span> string<\/span>)<\/span> *<\/span>AggregateBase<\/span> {<\/span>\r\n    return<\/span> &<\/span>AggregateBase<\/span>{<\/span>\r\n        aggregateID<\/span>:<\/span>         aggregateID<\/span>,<\/span>\r\n        streamVersion<\/span>:<\/span>       int64<\/span>(<\/span>0<\/span>),<\/span>\r\n        uncommittedEventMap<\/span>:<\/span> make<\/span>(<\/span>map<\/span>[<\/span>string<\/span>]<\/span>EventContext<\/span>),<\/span>\r\n        committedEventMap<\/span>:<\/span>   make<\/span>(<\/span>map<\/span>[<\/span>string<\/span>]<\/span>EventContext<\/span>),<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>a<\/span> *<\/span>AggregateBase<\/span>)<\/span> AggregateID<\/span>()<\/span> string<\/span> {<\/span>\r\n    return<\/span> a<\/span>.<\/span>aggregateID<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>a<\/span> *<\/span>AggregateBase<\/span>)<\/span> StreamVersion<\/span>()<\/span> int64<\/span> {<\/span>\r\n    return<\/span> a<\/span>.<\/span>streamVersion<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>a<\/span> *<\/span>AggregateBase<\/span>)<\/span> SetStreamVersion<\/span>(<\/span>value<\/span> int64<\/span>)<\/span> {<\/span>\r\n    a<\/span>.<\/span>streamVersion<\/span> =<\/span> value<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>a<\/span> *<\/span>AggregateBase<\/span>)<\/span> UncommittedEvents<\/span>()<\/span> []<\/span>EventContext<\/span> {<\/span>\r\n    if<\/span> a<\/span>.<\/span>uncommittedEventMap<\/span> ==<\/span> nil<\/span> {<\/span>\r\n        a<\/span>.<\/span>uncommittedEventMap<\/span> =<\/span> make<\/span>(<\/span>map<\/span>[<\/span>string<\/span>]<\/span>EventContext<\/span>)<\/span>\r\n    }<\/span>\r\n    results<\/span> :=<\/span> make<\/span>([]<\/span>EventContext<\/span>,<\/span> 0<\/span>,<\/span> len<\/span>(<\/span>a<\/span>.<\/span>uncommittedEventMap<\/span>))<\/span>\r\n    for<\/span> _<\/span>,<\/span> event<\/span> :=<\/span> range<\/span> a<\/span>.<\/span>uncommittedEventMap<\/span> {<\/span>\r\n        results<\/span> =<\/span> append<\/span>(<\/span>results<\/span>,<\/span> event<\/span>)<\/span>\r\n    }<\/span>\r\n    sort<\/span>.<\/span>SliceStable<\/span>(<\/span>results<\/span>,<\/span> func<\/span>(<\/span>i<\/span>,<\/span> j<\/span> int<\/span>)<\/span> bool<\/span> {<\/span>\r\n        return<\/span> results<\/span>[<\/span>i<\/span>]<\/span>.<\/span>GetOccurredOn<\/span>()<\/span> <<\/span> results<\/span>[<\/span>j<\/span>]<\/span>.<\/span>GetOccurredOn<\/span>()<\/span>\r\n    })<\/span>\r\n    return<\/span> results<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>a<\/span> *<\/span>AggregateBase<\/span>)<\/span> AppendUncommittedEvent<\/span>(<\/span>event<\/span> EventContext<\/span>)<\/span> {<\/span>\r\n    if<\/span> a<\/span>.<\/span>uncommittedEventMap<\/span> ==<\/span> nil<\/span> {<\/span>\r\n        a<\/span>.<\/span>uncommittedEventMap<\/span> =<\/span> make<\/span>(<\/span>map<\/span>[<\/span>string<\/span>]<\/span>EventContext<\/span>)<\/span>\r\n    }<\/span>\r\n    a<\/span>.<\/span>uncommittedEventMap<\/span>[<\/span>event<\/span>.<\/span>GetEventID<\/span>()]<\/span> =<\/span> event<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>a<\/span> *<\/span>AggregateBase<\/span>)<\/span> CommittedEvents<\/span>()<\/span> []<\/span>EventContext<\/span> {<\/span>\r\n    if<\/span> a<\/span>.<\/span>committedEventMap<\/span> ==<\/span> nil<\/span> {<\/span>\r\n        a<\/span>.<\/span>committedEventMap<\/span> =<\/span> make<\/span>(<\/span>map<\/span>[<\/span>string<\/span>]<\/span>EventContext<\/span>)<\/span>\r\n    }<\/span>\r\n    results<\/span> :=<\/span> make<\/span>([]<\/span>EventContext<\/span>,<\/span> 0<\/span>,<\/span> len<\/span>(<\/span>a<\/span>.<\/span>committedEventMap<\/span>))<\/span>\r\n    for<\/span> _<\/span>,<\/span> event<\/span> :=<\/span> range<\/span> a<\/span>.<\/span>committedEventMap<\/span> {<\/span>\r\n        results<\/span> =<\/span> append<\/span>(<\/span>results<\/span>,<\/span> event<\/span>)<\/span>\r\n    }<\/span>\r\n    sort<\/span>.<\/span>SliceStable<\/span>(<\/span>results<\/span>,<\/span> func<\/span>(<\/span>i<\/span>,<\/span> j<\/span> int<\/span>)<\/span> bool<\/span> {<\/span>\r\n        return<\/span> results<\/span>[<\/span>i<\/span>]<\/span>.<\/span>GetOccurredOn<\/span>()<\/span> <<\/span> results<\/span>[<\/span>j<\/span>]<\/span>.<\/span>GetOccurredOn<\/span>()<\/span>\r\n    })<\/span>\r\n    return<\/span> results<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>a<\/span> *<\/span>AggregateBase<\/span>)<\/span> CommitEvent<\/span>(<\/span>event<\/span> EventContext<\/span>)<\/span> {<\/span>\r\n    if<\/span> a<\/span>.<\/span>uncommittedEventMap<\/span> ==<\/span> nil<\/span> {<\/span>\r\n        a<\/span>.<\/span>uncommittedEventMap<\/span> =<\/span> make<\/span>(<\/span>map<\/span>[<\/span>string<\/span>]<\/span>EventContext<\/span>)<\/span>\r\n    }<\/span>\r\n    delete<\/span>(<\/span>a<\/span>.<\/span>uncommittedEventMap<\/span>,<\/span> event<\/span>.<\/span>GetEventID<\/span>())<\/span>\r\n    if<\/span> a<\/span>.<\/span>committedEventMap<\/span> ==<\/span> nil<\/span> {<\/span>\r\n        a<\/span>.<\/span>committedEventMap<\/span> =<\/span> make<\/span>(<\/span>map<\/span>[<\/span>string<\/span>]<\/span>EventContext<\/span>)<\/span>\r\n    }<\/span>\r\n    a<\/span>.<\/span>committedEventMap<\/span>[<\/span>event<\/span>.<\/span>GetEventID<\/span>()]<\/span> =<\/span> event<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u5927\u81f4\u4e0a\u6765\u89e3\u91ca…<\/p>\n
    \n
  • \n
      AggregateID\u304c\u4e00\u610f\u306aID\u3002DDD\u7684\u306b\u306f\u96c6\u7d04\u6bce\u306b\u5024\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u3057\u305f\u65b9\u304c\u3044\u3044\u3093\u3060\u308d\u3046\u306a\u3068\u306f\u601d\u3046\u3002<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          StreamVersion\u304c\u30a4\u30d9\u30f3\u30c8\u30bd\u30fc\u30b7\u30f3\u30b0\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u7ba1\u7406\u3067\u6c38\u7d9a\u5316\u3055\u308c\u308b\u3068SetStreamVersion\u3067\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\u3055\u308c\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            \n
          • \n
              UncommittedEvents\u304c\u9069\u7528\u524d\u306e\u30a4\u30d9\u30f3\u30c8\u3067\u3001\u30a4\u30d9\u30f3\u30c8\u304cAppendUncommittedEvent\u3067\u3053\u3053\u306b\u7a81\u3063\u8fbc\u307e\u308c\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n
               <\/p>\n
                \n
              • \n
                  CommittedEvents\u304c\u9069\u7528\u6e08\u306e\u30a4\u30d9\u30f3\u30c8\u3067\u3001\u6c38\u7d9a\u5316\u3084\u30ea\u30d7\u30ec\u30a4\u6642\u306b\u3053\u3053\u306b\u9069\u7528\u3055\u308c\u305f\u969b\u306bCommitEvent\u3067\u30a4\u30d9\u30f3\u30c8\u304c\u5165\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n
                   <\/p>\n
                    Replay\u306f\u6c38\u7d9a\u5316\u30b9\u30c8\u30a2\u304b\u3089\u518d\u751f\u3059\u308b\u6642\u306b\u547c\u3070\u308c\u308b\u3002\u3053\u308c\u306f\u5404\u96c6\u7d04\u30eb\u30fc\u30c8\u3067\u5b9f\u88c5\u3002<\/ul>\n
                    \u6d3b\u52a8<\/h2>\n
                    package<\/span> common<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n    \"github.com\/google\/uuid\"<\/span>\r\n    \"github.com\/pkg\/errors\"<\/span>\r\n)<\/span>\r\n\r\ntype<\/span> EventContext<\/span> interface<\/span> {<\/span>\r\n    GetEventID<\/span>()<\/span> string<\/span>\r\n    GetEventType<\/span>()<\/span> string<\/span>\r\n    GetOccurredOn<\/span>()<\/span> int64<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> NewEventID<\/span>()<\/span> (<\/span>string<\/span>,<\/span> error<\/span>)<\/span> {<\/span>\r\n    id<\/span>,<\/span> err<\/span> :=<\/span> uuid<\/span>.<\/span>NewUUID<\/span>()<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        return<\/span> \"\"<\/span>,<\/span> errors<\/span>.<\/span>Wrap<\/span>(<\/span>err<\/span>,<\/span> \"ID\u306e\u751f\u6210\u306b\u5931\u6557\u3057\u307e\u3057\u305f\"<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    return<\/span> id<\/span>.<\/span>String<\/span>(),<\/span> nil<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
                    \u6ca1\u6709\u7279\u522b\u9700\u8981\u89e3\u91ca\u7684\uff0c\u4f46\u4e3a\u4ec0\u4e48\u5728\u63a5\u53e3\u4e0a\u8981\u52a0\u4e0a”Get”\u5462\uff1f\u56e0\u4e3a\u5728\u5b9e\u73b0\u65f6\u53ef\u80fd\u51fa\u73b0\u540d\u79f0\u51b2\u7a81\u3002<\/p>\n
                    \u6c38\u4e45\u5b58\u50a8\u5e97<\/h2>\n
                    package<\/span> common<\/span>\r\n\r\ntype<\/span> PersistenceContext<\/span> interface<\/span> {<\/span>\r\n    ReplayAggregate<\/span>(<\/span>a<\/span> AggregateContext<\/span>)<\/span> error<\/span>\r\n    Save<\/span>(<\/span>a<\/span> AggregateContext<\/span>)<\/span> error<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> FakePersistence<\/span> struct<\/span>{}<\/span>\r\n\r\nfunc<\/span> (<\/span>p<\/span> *<\/span>FakePersistence<\/span>)<\/span> ReplayAggregate<\/span>(<\/span>a<\/span> AggregateContext<\/span>)<\/span> error<\/span> {<\/span>\r\n    storedEvents<\/span> :=<\/span> make<\/span>([]<\/span>*<\/span>StoredEvent<\/span>,<\/span> 0<\/span>)<\/span>\r\n    return<\/span> a<\/span>.<\/span>Replay<\/span>(<\/span>storedEvents<\/span>)<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>p<\/span> *<\/span>FakePersistence<\/span>)<\/span> Save<\/span>(<\/span>a<\/span> AggregateContext<\/span>)<\/span> error<\/span> {<\/span>\r\n    for<\/span> _<\/span>,<\/span> e<\/span> :=<\/span> range<\/span> a<\/span>.<\/span>UncommittedEvents<\/span>()<\/span> {<\/span>\r\n        \/*\r\n            storedEvent := &StoredEvent {\r\n                AggregateID: a.AggregateID(),\r\n                StreamVersion: a.StreamVersion(),\r\n                OccurredOn: e.OccurredOn(),\r\n                EventType: e.EventType(),\r\n                Data: []byte(e),\r\n            }\r\n\r\n            db save stored event\r\n        *\/<\/span>\r\n\r\n        a<\/span>.<\/span>CommitEvent<\/span>(<\/span>e<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    return<\/span> nil<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> PersistenceQueryContext<\/span> interface<\/span> {<\/span>\r\n    QueryEvents<\/span>(<\/span>id<\/span> string<\/span>,<\/span> base<\/span>,<\/span> limit<\/span> int64<\/span>)<\/span> ([]<\/span>*<\/span>StoredEvent<\/span>,<\/span> error<\/span>)<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> FakePersistenceQuery<\/span> struct<\/span>{}<\/span>\r\n\r\nfunc<\/span> (<\/span>p<\/span> *<\/span>FakePersistenceQuery<\/span>)<\/span> QueryEvents<\/span>(<\/span>id<\/span> string<\/span>,<\/span> base<\/span>,<\/span> limit<\/span> int64<\/span>)<\/span> ([]<\/span>*<\/span>StoredEvent<\/span>,<\/span> error<\/span>)<\/span> {<\/span>\r\n    storedEvents<\/span> :=<\/span> make<\/span>([]<\/span>*<\/span>StoredEvent<\/span>,<\/span> 0<\/span>)<\/span>\r\n\r\n    \/*\r\n        load stored events from db\r\n    *\/<\/span>\r\n\r\n    return<\/span> storedEvents<\/span>,<\/span> nil<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> StoredEvent<\/span> struct<\/span> {<\/span>\r\n    AggregateID<\/span>   string<\/span>\r\n    StreamVersion<\/span> int64<\/span>\r\n    OccurredOn<\/span>    int64<\/span>\r\n    EventType<\/span>     string<\/span>\r\n    Data<\/span>          []<\/span>byte<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
                    \u4f2a\u9020\uff08Fake\uff09\u6709\u70b9\u56f0\u96be\u3002\u5b9e\u9645\u4e0a\u6211\u5c1d\u8bd5\u4f7f\u7528Cassandra\uff08gocql\uff09\u6765\u5b9e\u73b0\uff0c\u4f46\u662f\u5982\u679c\u6df1\u5165\u8ba8\u8bba\u5c31\u4f1a\u53d8\u5f97\u592a\u957f\uff0c\u6240\u4ee5\u5728\u8fd9\u91cc\u7701\u7565\u4f7f\u7528Fake\u3002<\/p>\n
                      \n
                    • \n
                        FakePersistence\u3092\u30b3\u30de\u30f3\u30c9\u5074\u304c\u5229\u7528\u3057\u3001\u96c6\u7d04\u30eb\u30fc\u30c8\u306e\u6c38\u7d9a\u5316\u3084\u30ea\u30d7\u30ec\u30a4\u3092\u884c\u3044\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n
                         <\/p>\n
                          \n
                        • \n
                            FakePersistenceQuery\u3092\u30af\u30a8\u30ea\u5074\u304c\u5229\u7528\u3057\u3001\u6307\u5b9a\u3055\u308c\u305f\u7bc4\u56f2(base\u3068limit)\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u30a4\u30d9\u30f3\u30c8\u3092\u53d6\u5f97\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n
                             <\/p>\n
                              go\u3067\u306fC#\u3084\u3001Java\u306e\u3088\u3046\u306bblob\u30c7\u30fc\u30bf\u304b\u3089\u5358\u7d14\u306bstruct\u306b\u623b\u305b\u306a\u3044\u306e\u3067StoredEvent\u306b\u30e9\u30c3\u30d7\u3057\u3066\u3001\u518d\u751f\u6642\u306f\u305d\u306e\u4e2d\u306eEventType\uff08\u69cb\u9020\u4f53\u540d\uff09\u3092\u898b\u3066\u30a4\u30d9\u30f3\u30c8\u3092\u5143\u306estruct\u306b\u623b\u3057\u307e\u3059\u3002<\/ul>\n
                              \u6d88\u606f\u4f20\u9001<\/h2>\n
                              package<\/span> common<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n    \"context\"<\/span>\r\n\r\n    \"github.com\/google\/uuid\"<\/span>\r\n    \"github.com\/pkg\/errors\"<\/span>\r\n)<\/span>\r\n\r\ntype<\/span> MessageContext<\/span> interface<\/span> {<\/span>\r\n    GetMessageID<\/span>()<\/span> string<\/span>\r\n    GetMessageType<\/span>()<\/span> string<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> NewMessageID<\/span>()<\/span> (<\/span>string<\/span>,<\/span> error<\/span>)<\/span> {<\/span>\r\n    id<\/span>,<\/span> err<\/span> :=<\/span> uuid<\/span>.<\/span>NewUUID<\/span>()<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        return<\/span> \"\"<\/span>,<\/span> errors<\/span>.<\/span>Wrap<\/span>(<\/span>err<\/span>,<\/span> \"ID\u306e\u751f\u6210\u306b\u5931\u6557\u3057\u307e\u3057\u305f\"<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    return<\/span> id<\/span>.<\/span>String<\/span>(),<\/span> nil<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> MessagingProducerContext<\/span> interface<\/span> {<\/span>\r\n    Publish<\/span>(<\/span>m<\/span> MessageContext<\/span>)<\/span> error<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> FakeMessagingProducer<\/span> struct<\/span>{}<\/span>\r\n\r\nfunc<\/span> (<\/span>p<\/span> *<\/span>FakeMessagingProducer<\/span>)<\/span> Publish<\/span>(<\/span>m<\/span> MessageContext<\/span>)<\/span> error<\/span> {<\/span>\r\n    \/*\r\n        create message for messaging system\r\n        message header = m.MessageType()\r\n        message body = []byte(m)\r\n        messaging system send message\r\n    *\/<\/span>\r\n\r\n    return<\/span> nil<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> MessagingConsumerContext<\/span> interface<\/span> {<\/span>\r\n    Consume<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> msg<\/span> chan<\/span><-<\/span> MessageContext<\/span>)<\/span> error<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> FakeMessagingConsumer<\/span> struct<\/span>{}<\/span>\r\n\r\nfunc<\/span> (<\/span>c<\/span> *<\/span>FakeMessagingConsumer<\/span>)<\/span> Consume<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> msg<\/span> chan<\/span><-<\/span> MessageContext<\/span>)<\/span> error<\/span> {<\/span>\r\n    \/*\r\n        for {\r\n            select {\r\n            case <-ctx.Done():\r\n                return ctx.Err()\r\n            default:\r\n                delivery = from messaging system\r\n                msg <- delivery to MessageContext\r\n            }\r\n        }\r\n    *\/<\/span>\r\n\r\n    return<\/span> nil<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                              \u8fd9\u4e2a\u4e5f\u662f\u4e00\u4e2a\u5f88\u8d39\u52b2\u7684\u5047\u8d27\uff0c\u4f46\u6211\u4eec\u4e5f\u5b9e\u9645\u4e0a\u8bd5\u7528\u4e86Rabbitmq\uff08amqp\uff09\u3002\u5c06\u9891\u9053\u4f5c\u4e3a\u6d88\u8d39\u8005\u4f7f\u7528\u662f\u4e3a\u4e86\u90a3\u4e2a\u76ee\u7684\u3002<\/p>\n
                                \n
                              • \n
                                  FakeMessagingProducer\u304c\u9001\u4fe1\u5074\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n
                                   <\/p>\n
                                    \n
                                  • \n
                                      FakeMessagingConsumer\u304c\u53d7\u4fe1\u5074\u3067\u3059\u3002Channel\u3092\u4f7f\u3063\u3066\u53d7\u3051\u5f85\u3061\u3057\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n
                                       <\/p>\n
                                        \u3053\u3061\u3089\u3082struct\u3092\u518d\u751f\u3059\u308b\u305f\u3081\u306b\u30d8\u30c3\u30c0\u30fc\u7b49\u306bMessageType\uff08\u69cb\u9020\u4f53\u540d\uff09\u3068\u5165\u308c\u307e\u3059\u3002<\/ul>\n
                                        \u7ed3\u675f<\/h1>\n
                                        \u6682\u65f6\u5148\u5230\u8fd9\u91cc\u4f5c\u4e3a\u51c6\u5907\u7bc7\u3002
                                        \n\u56e0\u4e3a\u6211\u611f\u5230\u62c5\u5fe7\uff0c\u4e0d\u77e5\u9053\u5728Fake\u65b9\u9762\u80fd\u4e0d\u80fd\u5b9e\u9645\u5b9e\u73b0\uff0c\u800c\u4e14\u4ee3\u7801\u672c\u8eab\u4e5f\u6709\u4e9b\u6c89\u91cd\uff0c\u6211\u5728\u60f3\u80fd\u4e0d\u80fd\u66f4\u50cfGo\u8bed\u8a00\u4e00\u6837\u8f7b\u677e\u4e00\u70b9\u5462……\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                                        \u9996\u5148 \u6211\u60f3\u77e5\u9053\u5728Go\u8bed\u8a00\u4e2d\u662f\u5426\u53ef\u4ee5\u5b9e\u73b0CQRS+ES\uff1f\u4e8e\u662f\u6211\u4ece\u80fd\u5b9e\u73b0\u7684\u5730\u65b9\u5f00\u59cb\u5c1d\u8bd5\u3002 \u7531\u4e8e\u8fd9\u53ea\u662f\u4e00\u4e2a\u6311\u6218\uff0c\u6211\u5e0c […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-50513","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u5c1d\u8bd5\u5728Golang\u4e2d\u6311\u6218CQRS+ES - \u51c6\u5907\u7bc7 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5c1d\u8bd5\u5728golang\u4e2d\u6311\u6218cqrses-\u51c6\u5907\u7bc7\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5c1d\u8bd5\u5728Golang\u4e2d\u6311\u6218CQRS+ES - 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