{"id":50251,"date":"2023-09-18T08:10:25","date_gmt":"2023-08-06T21:02:37","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%80%bb%e7%bb%93%e4%ba%86%e5%85%b3%e4%ba%8egrpc%e8%ae%be%e8%ae%a1%e5%92%8c%e5%bc%80%e5%8f%91%e7%9a%84%e8%a6%81%e7%82%b9%e3%80%82\/"},"modified":"2024-05-04T00:17:39","modified_gmt":"2024-05-03T16:17:39","slug":"%e6%80%bb%e7%bb%93%e4%ba%86%e5%85%b3%e4%ba%8egrpc%e8%ae%be%e8%ae%a1%e5%92%8c%e5%bc%80%e5%8f%91%e7%9a%84%e8%a6%81%e7%82%b9%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%80%bb%e7%bb%93%e4%ba%86%e5%85%b3%e4%ba%8egrpc%e8%ae%be%e8%ae%a1%e5%92%8c%e5%bc%80%e5%8f%91%e7%9a%84%e8%a6%81%e7%82%b9%e3%80%82\/","title":{"rendered":"\u603b\u7ed3\u4e86\u5173\u4e8egRPC\u8bbe\u8ba1\u548c\u5f00\u53d1\u7684\u8981\u70b9"},"content":{"rendered":"

\u9996\u5148<\/h1>\n

\u8fd9\u662f2019\u5e74Future Advent Calendar 2\u7684\u7b2c22\u5929\u3002\u987a\u4fbf\u4e00\u63d0\uff0cAdvent Calendar 1\u7684\u6587\u7ae0\u5728\u8fd9\u91cc\u3002<\/p>\n

\u4eca\u5e74\u662f\u6211\u5165\u804c\u7684\u7b2c\u4e94\u4e2a\u5e74\u5934\u4e86\uff0c\u6bcf\u5e74\u5230\u4e86\u8fd9\u4e2a\u65f6\u5019\uff0c\u6211\u90fd\u4f1a\u53cd\u601d\u81ea\u5df1\u5728\u8fc7\u53bb\u4e00\u5e74\u91cc\u9762\u9762\u5bf9\u4e86\u54ea\u4e9b\u5de5\u4f5c\u548c\u6280\u672f\uff0c\u8fd9\u4e5f\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u673a\u4f1a\u3002\u6b64\u5916\uff0c\u7531\u4e8e\u63a5\u4e0b\u6765\u7684\u9879\u76ee\u90fd\u975e\u5e38\u5fd9\u788c\uff0c\u5b8c\u5168\u4e0d\u5f97\u4e0d\u5229\u7528\u5b9d\u8d35\u7684\u4f11\u606f\u65e5\u6765\u64b0\u5199\u6587\u7ae0\uff0c\u975e\u5e38\u8270\u96be\u3002\u56e0\u6b64\uff0c\u6211\u9996\u5148\u8981\u786e\u4fdd\u6587\u7ae0\u7684\u8d28\u91cf\u3002<\/p>\n

\u7b80\u8981\u6982\u8ff0<\/h1>\n

2019\u5e74\u6211\u9886\u5bfc\u5e76\u53c2\u4e0e\u4e86\u4f7f\u7528KVS\u7b49NoSQL\u6570\u636e\u5e93\u8fdb\u884c\u5e94\u7528\u7a0b\u5e8f\u7684\u8bbe\u8ba1\u548c\u5f00\u53d1\u3002
\n\u56de\u5934\u770b\uff0c\u6211\u4e4b\u524d\u53ea\u5199\u4e86\u6709\u5173Cassandra\u7684\u6587\u7ae0\uff0c\u6240\u4ee5\u8fd9\u6b21\u6211\u5e0c\u671b\u4e13\u6ce8\u4e8e\u5199\u5173\u4e8egRPC\u7684\u6587\u7ae0\u3002
\n\u4e4b\u524d\u6211\u4e3b\u8981\u4e13\u6ce8\u4e8e\u57fa\u7840\u8bbe\u65bd\u548c\u4e2d\u95f4\u4ef6\u7684\u8bbe\u8ba1\u548c\u6784\u5efa\uff0c\u5bf9API\u7684\u8bbe\u8ba1\u548c\u5f00\u53d1\u6ca1\u6709\u8ba4\u771f\u8fdb\u884c\u8fc7\uff0c\u4e00\u76f4\u4ee5\u6765\u90fd\u5f88\u56f0\u96be\uff0c\u4f46\u901a\u8fc7gRPC\u7684\u8bbe\u8ba1\u548c\u5f00\u53d1\uff0c\u6211\u5e0c\u671b\u80fd\u5c06\u6240\u5f97\u5230\u7684\u77e5\u8bc6\u56de\u9988\u7ed9\u5927\u5bb6\u3002<\/p>\n

gRPC\u662f\u4e00\u79cd\u901a\u4fe1\u534f\u8bae\u3002<\/h1>\n

gRPC\u662fGoogle\u5f00\u53d1\u7684\u5f00\u6e90\u9879\u76ee\uff0c\u5229\u7528Protocol Buffers\u8fdb\u884c\u6570\u636e\u5e8f\u5217\u5316\uff0c\u5b9e\u73b0\u4e86\u6bd4REST\u66f4\u5feb\u7684\u901a\u4fe1\u901f\u5ea6\u3002
\ngRPC\u8fd8\u5177\u6709\u4e00\u4e2a\u7279\u70b9\uff0c\u5c31\u662f\u901a\u8fc7\u5b9a\u4e49\u4e00\u4e2a\u88ab\u79f0\u4e3aproto\u6587\u4ef6\u7684\u63a5\u53e3\u5b9a\u4e49\u8bed\u8a00\uff08IDL\uff09\u6587\u4ef6\u6765\u5b9a\u4e49API\u89c4\u8303\uff0c\u53ef\u4ee5\u81ea\u52a8\u6839\u636eproto\u6587\u4ef6\u751f\u6210\u9002\u5408\u4e0d\u540c\u8bed\u8a00\uff08\u5982Java\u3001C++\u3001Python\u3001Go\uff09\u7684\u5ba2\u6237\u7aef\/\u670d\u52a1\u5668\u6e90\u4ee3\u7801\u6a21\u677f\u3002proto\u6587\u4ef6\u6309\u7167proto3\u7684\u8bed\u8a00\u89c4\u8303\u8fdb\u884c\u5b9a\u4e49\u3002<\/p>\n

\"grpc_concept_diagram_00.png\"<\/div>\n

\u9009\u62e9\u4f7f\u7528gRPC\u7684\u8981\u70b9<\/h1>\n

\u5728\u9009\u62e9\u4f7f\u7528gRPC\u4f5c\u4e3aAPI\u65f6\uff0c\u4e0e\u4e4b\u5e38\u5e38\u8fdb\u884c\u6bd4\u8f83\u7684\u662fREST\u3002
\n\u6211\u8d1f\u8d23\u8bbe\u8ba1\u548c\u5f00\u53d1\u7684\u8fd9\u4e2aAPI\u670d\u52a1\u5668\u662f\u7528\u4e8e\u6267\u884c\u5bf9\u540e\u7aef\u6570\u636e\u5b58\u50a8\u5c42\u7684CRUD\u64cd\u4f5c\u7684API\uff0c\u901a\u8fc7\u4f7f\u7528proto\u5bf9\u4eceKVS\u7b49\u83b7\u53d6\u7684\u6570\u636e\u8fdb\u884c\u7ed3\u6784\u5316\u5b9a\u4e49\uff0c\u76f8\u6bd4REST\u8fdb\u884c\u901a\u4fe1\u66f4\u5feb\u7684\u7279\u70b9\u662f\u9009\u62e9\u91c7\u7528\u6570\u636e\u5b58\u50a8API\u7684\u6700\u5927\u4f18\u70b9\u3002<\/p>\n

\u6b64\u5916\uff0c\u5728\u5b9e\u73b0\u5fae\u670d\u52a1\u67b6\u6784\u65f6\uff0c\u7edf\u4e00API\u89c4\u683c\u662f\u4e00\u9879\u975e\u5e38\u8d39\u65f6\u7684\u5de5\u4f5c\u3002\u800c\u91c7\u7528gRPC\u53ef\u4ee5\u901a\u8fc7\u4e25\u683c\u7684\u63a5\u53e3\u89c4\u5219\u6765\u4fdd\u6301\u63a5\u53e3\u7684\u4e00\u81f4\u6027\uff0c\u76f8\u6bd4\u81ea\u7531\u5ea6\u8f83\u9ad8\u7684REST\u8bbe\u8ba1\uff0cgRPC\u7684\u91c7\u7528\u4f18\u52bf\u66f4\u5927\u3002<\/p>\n

\u7136\u800c\uff0c\u4e0eREST\u76f8\u6bd4\uff0c\u5e76\u6ca1\u6709\u7edd\u5bf9\u7684\u4f18\u52bf\uff0c\u6240\u4ee5\u6211\u4eec\u8ba4\u4e3a\u4ece\u80fd\u5426\u4eab\u53d7\u5230\u4e0a\u8ff0\u4f18\u70b9\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u4ee5\u9010\u6848\u9009\u62e9\u4e3a\u597d\u3002<\/p>\n

gRPC\u7684\u8bbe\u8ba1\u548c\u5f00\u53d1\u8981\u70b9\u3002<\/h1>\n

1. protobuf\u6587\u4ef6\u7684\u7ba1\u7406\u65b9\u6cd5<\/h2>\n

1-1. \u590d\u6742\u7684\u5d4c\u5957\u7ed3\u6784\u6570\u636e\u9700\u8981\u5c06proto\u6587\u4ef6\u5206\u5272\u5e76\u5b9a\u4e49\u3002<\/h3>\n

\u7531\u4e8e\u6570\u636e\u5b58\u50a8\u91c7\u7528\u4e86Cassandra\uff0c\u5904\u7406\u7684\u6570\u636e\u5e76\u4e0d\u662f\u6241\u5e73\u7684\u6570\u636e\u5c42\u6b21\uff0c\u800c\u662f\u5d4c\u5957\u7684\u590d\u6742\u7ed3\u6784\u6570\u636e\u3002\u56e0\u6b64\uff0c\u53ef\u4ee5\u5c06\u6df1\u5ea6\u5d4c\u5957\u7684\u7ed3\u6784\u6570\u636e\u5b9a\u4e49\u5728\u4e00\u4e2aproto\u6587\u4ef6\u4e2d\uff0c\u4f46\u7531\u4e8e\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u8f83\u5dee\uff0c\u6211\u4eec\u9009\u62e9\u5c06proto\u6587\u4ef6\u5206\u5272\u5e76\u8fdb\u884c\u5b9a\u4e49\uff0c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n

\u5b9a\u4e49\u4e00\u4e2a\u793a\u4f8b\uff0c\u5728\u4e00\u4e2a\u6587\u4ef6\u4e2d\u3002<\/h4>\n

\u5728\u4e00\u4e2a\u6587\u4ef6\u4e2d\u5b9a\u4e49\u5c42\u6b21\u7ed3\u6784\u662f\u53ef\u80fd\u7684\uff0c\u4f46\u662f\u5f53\u5728\u4e00\u4e2aproto\u6587\u4ef6\u4e2d\u8868\u793a\u591a\u4e2a\u5c42\u6b21\u6a21\u578b\u6216\u8005\u5d4c\u5957\u5c42\u6570\u589e\u52a0\u5230\u4e24\u5c42\u3001\u4e09\u5c42\u65f6\uff0c\u90a3\u4e48\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u90fd\u4f1a\u53d8\u5dee\u3002<\/p>\n

\r\nsyntax<\/span> =<\/span> \"proto3\"<\/span>;<\/span>\r\noption<\/span> java_package<\/span> =<\/span> \"jp.co.sample.datastore.common.model\"<\/span>;<\/span>\r\n\r\npackage<\/span> common<\/span>;<\/span>\r\n\r\nmessage<\/span> ParentModel<\/span> {<\/span>\r\n  string<\/span> parentId<\/span>    =<\/span> 1<\/span>;<\/span>\r\n  string<\/span> parentNm<\/span>    =<\/span> 2<\/span>;<\/span>\r\n  ChildModel<\/span> child<\/span>   =<\/span> 3<\/span>;<\/span> \/\/ \u30d5\u30a1\u30a4\u30eb\u5185\u306b\u5b9a\u7fa9\u3057\u305fChildModel\u3092\u578b\u306b\u6307\u5b9a<\/span>\r\n}<\/span>\r\n\r\nmessage<\/span> ChildModel<\/span> {<\/span>\r\n  string<\/span> childId<\/span>    =<\/span> 1<\/span>;<\/span>\r\n  string<\/span> childNm<\/span>    =<\/span> 2<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5728\u591a\u4e2a\u6587\u4ef6\u4e2d\u8fdb\u884c\u5b9a\u4e49\u7684\u4f8b\u5b50\u3002<\/h4>\n
\u7531\u4e8e\u53ef\u4ee5\u5728\u4e0d\u540c\u6587\u4ef6\u4e2d\u5206\u5272\u5b9a\u4e49ChildModel\u548cParentModel\uff0c\u56e0\u6b64\u6211\u4eec\u9009\u62e9\u6309\u7167\u7ed3\u6784\u5355\u4f4d\u5206\u5272\u6587\u4ef6\u8fdb\u884c\u7ba1\u7406\u3002\u540e\u7eed\u6211\u4eec\u4f1a\u7ee7\u7eed\u8ba8\u8bba\uff0c\u4f46\u662fCassandra\u652f\u6301\u7528\u6237\u81ea\u5b9a\u4e49\u7c7b\u578b\uff08\u79f0\u4e3aUDT\uff09\uff0c\u53ef\u4ee5\u5728DDL\u4e2d\u5b9a\u4e49\u4efb\u610f\u7ed3\u6784\u4f53\uff0c\u6240\u4ee5\u6211\u4eec\u4e5f\u5c06proto\u6a21\u578b\u6309\u7167UDT\u5355\u4f4d\u8fdb\u884c\u4e86\u5206\u5272\u3002<\/p>\n
\r\nsyntax<\/span> =<\/span> \"proto3\"<\/span>;<\/span>\r\noption<\/span> java_package<\/span> =<\/span> \"jp.co.sample.datastore.common.model\"<\/span>;<\/span>\r\n\r\npackage<\/span> common<\/span>;<\/span>\r\n\r\nmessage<\/span> ChildModel<\/span> {<\/span>\r\n  string<\/span> childId<\/span>    =<\/span> 1<\/span>;<\/span>\r\n  string<\/span> childNm<\/span>    =<\/span> 2<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\r\nsyntax<\/span> =<\/span> \"proto3\"<\/span>;<\/span>\r\noption<\/span> java_multiple_files<\/span> =<\/span> true<\/span>;<\/span>\r\noption<\/span> java_package<\/span> =<\/span> \"jp.co.sample.datastore.common.model\"<\/span>;<\/span>\r\n\r\npackage<\/span> common<\/span>;<\/span>\r\n\r\nimport<\/span> \"common\/child_model.proto\"<\/span>;<\/span> \/\/ ChildModel\u3092\u5b9a\u7fa9\u3057\u305fproto\u3092\u6307\u5b9a<\/span>\r\n\r\nmessage<\/span> ParentModel<\/span> {<\/span>\r\n  string<\/span> parentId<\/span>    =<\/span> 1<\/span>;<\/span>\r\n  string<\/span> parentNm<\/span>    =<\/span> 2<\/span>;<\/span>\r\n  ChildModel<\/span> child<\/span>   =<\/span> 3<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
1-2. proto\u6587\u4ef6\u5e94\u4e0e\u6570\u636e\u5b9a\u4e49\u8bed\u8a00\uff08DDL\uff09\u4e00\u8d77\u7ba1\u7406\u3002<\/h3>\n
\u5728gRPC\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7proto\u6587\u4ef6\u5b9a\u4e49\u548c\u7ba1\u7406API\u89c4\u8303\u3002\u901a\u8fc7\u5c06\u8fd9\u4e2aproto\u6587\u4ef6\u4f7f\u7528Git\u7b49\u8fdb\u884c\u7248\u672c\u63a7\u5236\uff0c\u6211\u4eec\u53ef\u4ee5\u59cb\u7ec8\u4fdd\u6301API\u89c4\u8303\u7684\u6700\u65b0\u72b6\u6001\u3002<\/p>\n
\u7136\u800c\uff0c\u5728\u4f7f\u7528\u6570\u636e\u5b58\u50a8API\u65f6\uff0c\u867d\u7136\u5e94\u7528\u7a0b\u5e8f\u53ea\u9700\u7ba1\u7406proto\u5b9a\u4e49\u7684\u8bf7\u6c42\u54cd\u5e94\u53c2\u6570\u5373\u53ef\uff0c\u4f46\u4e3a\u4e86\u4ee5\u7ed3\u6784\u5316\u7684\u65b9\u5f0f\u5904\u7406\u4eceCassandra\u83b7\u53d6\u7684\u6570\u636e\uff0c\u9700\u8981\u786e\u4fdd\u4e0eCassandra\u8868\u5b9a\u4e49\u7684\u4e00\u81f4\u6027\u3002<\/p>\n
\u5728\u5e94\u7528\u7a0b\u5e8f\u5f00\u53d1\u4e2d\uff0cDDL\u7684\u66f4\u6539\u548c\u66f4\u65b0\u662f\u5bb6\u5e38\u4fbf\u996d\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u5c06Cassandra\u7684DDL\u4ee5\u516c\u53f8\u5185\u90e8\u7684\u6807\u51c6\u683c\u5f0f\u4fdd\u5b58\u5728\u8868\u5b9a\u4e49\u4e66\u6587\u4ef6\u4e2d\u8fdb\u884c\u7ba1\u7406\u3002\u901a\u8fc7\u5c06\u8fd9\u4e2a\u5b9a\u4e49\u4e66\u4f5c\u4e3a\u8f93\u5165\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u81ea\u52a8\u751f\u6210proto\u6587\u4ef6\uff0c\u4ee5\u786e\u4fdd\u4e24\u8005\u7684\u6574\u5408\u6027\uff0c\u5373\u4f7f\u8868\u5b9a\u4e49\u53d1\u751f\u53d8\u5316\u3002<\/p>\n
\u968f\u7740\u5f00\u53d1\u89c4\u6a21\u7684\u589e\u5927\uff0c\u5438\u6536proto\u4e0eDDL\u5dee\u5f02\u53d8\u5f97\u56f0\u96be\uff0c\u56e0\u6b64\u4ece\u4e00\u5f00\u59cb\u5c31\u8981\u5efa\u7acb\u826f\u597d\u7684\u673a\u5236\u662f\u6700\u4f73\u9009\u62e9\u3002<\/p>\n
1-3. IF\u6a21\u5757\u7ba1\u7406\u65b9\u5f0f<\/h3>\n
\u53ef\u4ee5\u6839\u636eproto\u6587\u4ef6\u81ea\u52a8\u751f\u6210\u5404\u79cd\u8bed\u8a00\u6240\u9700\u7684\u5ba2\u6237\u7aef\/\u670d\u52a1\u5668\u63a5\u53e3\u7684\u6e90\u4ee3\u7801\u3002<\/p>\n
\u7136\u800c\uff0c\u6bcf\u6b21\u4eceproto\u6587\u4ef6\u81ea\u52a8\u751f\u6210\u6e90\u4ee3\u7801\u5e76\u63d0\u4ea4\u975e\u5e38\u9ebb\u70e6\uff0c\u800c\u4e14\u5f53\u5f00\u53d1\u4eba\u5458\u589e\u52a0\u65f6\uff0c\u8fd9\u9879\u5de5\u4f5c\u53d8\u5f97\u5197\u6742\u3002\u6240\u4ee5\u6211\u4eec\u9009\u62e9\u4ece\u6700\u65b0\u7684proto\u6587\u4ef6\u751f\u6210\u63a5\u53e3\u6a21\u5757\uff0c\u5e76\u4e0enexus\u5e93\u534f\u540c\u5de5\u4f5c\uff0c\u5b9e\u73b0\u8f6f\u4ef6\u5305\u7ba1\u7406\u3002<\/p>\n
\u56e0\u4e3a\u8fd9\u6b21\u662f\u4f7f\u7528Java\u8fdb\u884c\u5ba2\u6237\u7aef\/\u670d\u52a1\u5668\u5f00\u53d1\uff0c\u6240\u4ee5\u6211\u4eec\u901a\u8fc7gradle\u4ecenexus\u83b7\u53d6\u5305\u8fdb\u884c\u4e86\u5b9a\u4e49\u3002<\/p>\n
2. \u5b9e\u73b0\u4f7f\u7528\u81ea\u5b9a\u4e49\u9009\u9879\u7684\u901a\u7528\u5904\u7406\u3002<\/h2>\n
\u5728API\u8bbe\u8ba1\u4e2d\uff0c\u9700\u8981\u5bf9\u8bf7\u6c42\u53c2\u6570\u8fdb\u884c\u9a8c\u8bc1\u8bbe\u8ba1\u3002
\n\u5728gRPC\u4e2d\uff0c\u5728\u4e3aproto\u6587\u4ef6\u5b9a\u4e49\u6570\u636e\u65f6\uff0c\u5fc5\u987b\u6307\u5b9a\u7c7b\u578b\uff0c\u5982string\u6216int\u3002
\n\u8fd8\u53ef\u4ee5\u5b9a\u4e49\u548c\u5904\u7406\u96c6\u5408\u7c7b\u578b\uff0c\u5982map\u6216set\u3002<\/p>\n
\u56e0\u6b64\uff0c\u4e0d\u9700\u8981\u5bf9\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u53c2\u6570\u8fdb\u884c\u7c7b\u578b\u68c0\u67e5\uff0c\u4f46\u9700\u8981\u8003\u8651\u5176\u4ed6\u5fc5\u8981\u7684\u68c0\u67e5\u548c\u9a8c\u8bc1\uff0c\u5982\u5fc5\u586b\u68c0\u67e5\u548c\u4f4d\u6570\u68c0\u67e5\u7b49\u3002<\/p>\n
\u901a\u8fc7\u5728 proto \u6587\u4ef6\u4e2d\u5229\u7528 Custom Options \u5bf9\u6587\u4ef6\u6216\u5b57\u6bb5\u8fdb\u884c\u5b9a\u4e49\uff0c\u53ef\u4ee5\u4ece gRPC \u6a21\u578b\u4e2d\u83b7\u53d6\u81ea\u5b9a\u4e49\u9009\u9879\u5e76\u5b9e\u73b0\u4efb\u610f\u7684\u5904\u7406\u3002<\/p>\n
2-1. \u5ba2\u5236\u9009\u9879\u5b9a\u4e49\u793a\u4f8b<\/h3>\n
\r\nsyntax<\/span> =<\/span> \"proto3\"<\/span>;<\/span>\r\n\r\noption<\/span> java_multiple_files<\/span> =<\/span> true<\/span>;<\/span>\r\noption<\/span> java_package<\/span> =<\/span> \"jp.co.sample.datastore.option.model\"<\/span>;<\/span>\r\n\r\npackage<\/span> option<\/span>;<\/span>\r\n\r\nimport<\/span> \"google\/protobuf\/descriptor.proto\"<\/span>;<\/span>\r\n\r\nextend<\/span> google<\/span>.<\/span>protobuf.FieldOptions<\/span> {<\/span>\r\n  bool<\/span> required<\/span> =<\/span> 50000<\/span>;<\/span> \/\/ \u5fc5\u9808\u30c1\u30a7\u30c3\u30af\u30aa\u30d7\u30b7\u30e7\u30f3<\/span>\r\n}<\/span>\r\n\r\nextend<\/span> google<\/span>.<\/span>protobuf.FieldOptions<\/span> {<\/span>\r\n  int32<\/span> strlen<\/span> =<\/span> 50001<\/span>;<\/span> \/\/ \u6841\u6570\u30c1\u30a7\u30c3\u30af\u30aa\u30d7\u30b7\u30e7\u30f3<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5c06\u4e0a\u8ff0\u51c6\u5907\u597d\u7684\u81ea\u5b9a\u4e49\u9009\u9879\u5b9a\u4e49\u5230\u4efb\u610f\u5b57\u6bb5\u4e2d\u3002<\/p>\n
syntax<\/span> =<\/span> \"proto3\"<\/span>;<\/span>\r\n\r\noption<\/span> java_multiple_files<\/span> =<\/span> true<\/span>;<\/span>\r\noption<\/span> java_package<\/span> =<\/span> \"jp.co.sample.datastore.common.model\"<\/span>;<\/span>\r\n\r\npackage<\/span> common<\/span>;<\/span>\r\n\r\nimport<\/span> \"option\/custom_option.proto\"<\/span>;<\/span> \/\/ \u30ab\u30b9\u30bf\u30e0\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u5b9a\u7fa9\u3057\u305fproto\u3092import<\/span>\r\n\r\nmessage<\/span> User<\/span> {<\/span>\r\n  string<\/span> user_id<\/span>            =<\/span> 1<\/span>[(<\/span>required<\/span>)<\/span>=<\/span>true<\/span>,(<\/span>strlen<\/span>)<\/span>=<\/span>8<\/span>];<\/span> \/\/ \u8907\u6570\u30aa\u30d7\u30b7\u30e7\u30f3\u5b9a\u7fa9\u3082\u53ef\u80fd<\/span>\r\n  string<\/span> user_name<\/span>          =<\/span> 2<\/span>[(<\/span>required<\/span>)<\/span>=<\/span>true<\/span>];<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
2-2. \u83b7\u53d6\u81ea\u5b9a\u4e49\u9009\u9879\u7684\u65b9\u6cd5\uff08Java\uff09<\/h3>\n
\u8fd9\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u7528\u4e8e\u4ece\u4e0a\u8ff0\u5b9a\u4e49\u7684message\u6a21\u578b\u7684User\u5b57\u6bb5\u4e2d\u83b7\u53d6\u8bbe\u7f6e\u7684\u81ea\u5b9a\u4e49\u9009\u9879\u3002
\n\u901a\u8fc7”User.getDescriptorForType().getFields()”\u53ef\u4ee5\u83b7\u53d6\u5230User\u6a21\u578b\u7684\u5143\u4fe1\u606fFieldDescriptor\uff0c
\n\u901a\u8fc7\u64cd\u4f5c\u8be5FieldDescriptor\u53ef\u4ee5\u83b7\u53d6\u9009\u9879\u4fe1\u606f\u3002<\/p>\n
for<\/span>(<\/span>Descriptors<\/span>.<\/span>FieldDescriptor<\/span> fds:<\/span> User<\/span>.<\/span>getDescriptorForType<\/span>().<\/span>getFields<\/span>()){<\/span>\r\n    System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>fds<\/span>.<\/span>getName<\/span>())<\/span>\r\n    for<\/span>(<\/span>Map<\/span>.<\/span>Entry<\/span><<\/span>Descriptors<\/span>.<\/span>FieldDescriptor<\/span>,<\/span>Object<\/span>><\/span> entry<\/span> :<\/span> fds<\/span>.<\/span>getOptions<\/span>.<\/span>getAllFields<\/span>().<\/span>entrySet<\/span>()){<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"option:\"<\/span> +<\/span> entry<\/span>.<\/span>getKey<\/span>().<\/span>getName<\/span>()<\/span> +<\/span> \"=\"<\/span> entry<\/span>.<\/span>getValue<\/span>());<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n\/* \u51fa\u529b\u7d50\u679c *\/<\/span>\r\n\/\/ user_id<\/span>\r\n\/\/ option:required=true<\/span>\r\n\/\/ option:strlen=8<\/span>\r\n\/\/ user_nm<\/span>\r\n\/\/ option:required=true<\/span>\r\n<\/code><\/pre>\n
2-3. \u9a8c\u8bc1\u5b9e\u73b0\u793a\u4f8b<\/h3>\n
\u7531\u4e8e\u53ef\u4ee5\u4f7f\u7528”hasExtension()”\u65b9\u6cd5\u5bf9Message\u7684FieldDescriptor\u8fdb\u884c\u5b58\u5728\u68c0\u67e5\uff0c\u56e0\u6b64\u60a8\u53ef\u4ee5\u4ecegRPC\u6a21\u578b\u4e2d\u5b9e\u73b0\u6bcf\u4e2a\u5b57\u6bb5\u7684\u4efb\u610f\u9009\u9879\u9a8c\u8bc1\u3002\u6b64\u5916\uff0cgRPC\u6a21\u578b\u7ee7\u627f\u81ea\u4e00\u4e2a\u79f0\u4e3aMessage\u7c7b\u578b\u7684\u5171\u540c\u63a5\u53e3\u7c7b\uff0c\u901a\u8fc7\u5c06\u5176\u8f6c\u6362\u4e3aMessage\u7c7b\u578b\u5e76\u64cd\u4f5cFieldDescriptor\uff0c\u60a8\u53ef\u4ee5\u5b9e\u73b0\u901a\u7528\u7684\u5904\u7406\u903b\u8f91\uff0c\u800c\u4e0d\u4f9d\u8d56\u4e8e\u7279\u5b9a\u7684\u6a21\u578b\u3002<\/p>\n
\r\nif<\/span>(<\/span>fds<\/span>.<\/span>getOptions<\/span>().<\/span>hasExtension<\/span>(<\/span>CustomOption<\/span>.<\/span>required<\/span>)){<\/span>\r\n  \/\/ hasExtension\u3067\u30d5\u30a3\u30fc\u30eb\u30c9\u30e1\u30bf\u60c5\u5831\u304b\u3089\"required\"\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u5b58\u5728\u3059\u308b\u304b\u30c1\u30a7\u30c3\u30af<\/span>\r\n\r\n  Object<\/span> value<\/span> =<\/span> fds<\/span>.<\/span>getOptions<\/span>().<\/span>getExtension<\/span>(<\/span>CustomOption<\/span>.<\/span>required<\/span>);<\/span> \/\/ getExtension\u3067\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u4e2d\u8eab\u3092\u53d6\u308a\u51fa\u3059<\/span>\r\n  \/\/ \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u51e6\u7406\u5b9f\u88c5<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
3. \u5728 gRPC \u6a21\u578b\u4e2d\uff0c\u660e\u786e\u5904\u7406\u7a7a\u5b57\u7b26\u4e32\u548c 0\u3002<\/h2>\n
\u5728proto\u6587\u4ef6\u4e2d\uff0c\u5982\u679c\u5728\u6a21\u578b\u63a5\u53e3\u4e2d\u5b9a\u4e49\u7684string\u6216int\u7c7b\u578b\u7684\u5b57\u6bb5\u6ca1\u6709\u8bbe\u7f6e\u503c\uff0c\u90a3\u4e48\u83b7\u53d6\u8be5\u5b57\u6bb5\u7684\u503c\u65f6\u5c06\u5f97\u5230\u9ed8\u8ba4\u503c\uff0c\u5373\u5982\u679c\u662fstring\u7c7b\u578b\uff0c\u5219\u4e3a\u7a7a\u5b57\u7b26\u4e32\uff0c\u5982\u679c\u662fint32\u6216int64\u7c7b\u578b\uff0c\u5219\u4e3a0\u3002<\/p>\n
\u6bd4\u5982\uff0c\u5f53\u4ece\u5ba2\u6237\u7aef\u63a5\u6536\u5230gRPC\u6a21\u578b\u5e76\u6839\u636e\u5b57\u6bb5\u8bbe\u7f6e\u7684\u503c\u5bf9\u6570\u636e\u5b58\u50a8\u6267\u884c\u66f4\u65b0\u64cd\u4f5c\u65f6\uff0c\u670d\u52a1\u5668\u65e0\u6cd5\u5224\u65ad\u5ba2\u6237\u7aef\u662f\u6709\u610f\u521d\u59cb\u5316\u4e3a\u7a7a\u5b57\u7b26\u4e32\u62160\uff0c\u8fd8\u662f\u4ec5\u672a\u8bbe\u7f6e\u4e3agRPC\u6a21\u578b\u7684\u9ed8\u8ba4\u503c\uff08\u65e0\u9700\u66f4\u65b0\uff09\u3002\u8fd9\u662f\u4e00\u4e2a\u95ee\u9898\u3002<\/p>\n
\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0cgRPC\u63d0\u4f9b\u4e86\u5305\u88c5\u5668\u7c7b\uff0c\u5b9a\u4e49\u8fd9\u4e9b\u7c7b\u53ef\u4ee5\u4f7f\u5176\u53ef\u5224\u65ad\u3002<\/p>\n
3-1. \u4f7f\u7528\u5305\u88c5\u5668\u7c7b\u7684proto\u6587\u4ef6\u5b9a\u4e49\u793a\u4f8b\u3002<\/h3>\n
\r\nmessage<\/span> Test<\/span>{<\/span>\r\n  string<\/span>       value1<\/span>  =<\/span> 1<\/span>;<\/span> \/\/ \u7a7a\u6587\u5b57\u3092\u30bb\u30c3\u30c8\u3057\u305f\u306e\u304b\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306a\u306e\u304b\u5224\u5b9a\u3067\u304d\u306a\u3044<\/span>\r\n  int32<\/span>        value2<\/span>  =<\/span> 2<\/span>;<\/span> \/\/ 0\u3092\u30bb\u30c3\u30c8\u3057\u305f\u306e\u304b\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306a\u306e\u304b\u5224\u5b9a\u3067\u304d\u306a\u3044<\/span>\r\n  StringValue<\/span>  value3<\/span>  =<\/span> 3<\/span>;<\/span> \/\/ \u7a7a\u6587\u5b57\u3092\u30bb\u30c3\u30c8\u3057\u305f\u306e\u304b\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306a\u306e\u304b\u5224\u5b9a\u3067\u304d\u308b<\/span>\r\n  Int32Value<\/span>   value4<\/span>  =<\/span> 4<\/span>;<\/span> \/\/ 0\u3092\u30bb\u30c3\u30c8\u3057\u305f\u306e\u304b\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306a\u306e\u304b\u5224\u5b9a\u3067\u304d\u308b<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
3-2. \u503c\u7684\u5b58\u5728\u68c0\u67e5\u5b9e\u73b0\u793a\u4f8b<\/h3>\n
\r\n    Test<\/span>.<\/span>Builder<\/span> testBuilder<\/span> =<\/span> Test<\/span>.<\/span>newBuilder<\/span>();<\/span>\r\n\r\n    \/\/ \u660e\u793a\u7684\u306b\u7a7a\u6587\u5b57,0\u3092\u30bb\u30c3\u30c8\u3059\u308b<\/span>\r\n    testBuilder<\/span>\r\n        .<\/span>setValue1<\/span>(<\/span>\"\"<\/span>)<\/span>\r\n        .<\/span>setValue2<\/span>(<\/span>0<\/span>)<\/span>\r\n        .<\/span>setValue3<\/span>(<\/span>StringValue<\/span>.<\/span>newBuilder<\/span>().<\/span>setValue<\/span>(<\/span>\"\"<\/span>))<\/span>\r\n        .<\/span>setValue4<\/span>(<\/span>Int32Value<\/span>.<\/span>newBuilder<\/span>().<\/span>setValue<\/span>(<\/span>0<\/span>))<\/span>\r\n        ;<\/span>\r\n\r\n    for<\/span>(<\/span>Descriptors<\/span>.<\/span>FieldDescriptor<\/span> fds<\/span> :<\/span> testBuilder<\/span>.<\/span>build<\/span>().<\/span>getDescriptorForType<\/span>().<\/span>getFields<\/span>())<\/span> {<\/span>\r\n        if<\/span> (<\/span>testBuilder<\/span>.<\/span>hasField<\/span>(<\/span>fds<\/span>))<\/span> {<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>fds<\/span>.<\/span>getName<\/span>()<\/span> +<\/span> \" has field\"<\/span>);<\/span>\r\n        }<\/span> else<\/span> {<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>fds<\/span>.<\/span>getName<\/span>()<\/span> +<\/span> \" has not field\"<\/span>);<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n\r\n    \/*\u51fa\u529b\u4f8b*\/<\/span>\r\n    \/\/ value1 has not field<\/span>\r\n    \/\/ value2 has not field<\/span>\r\n    \/\/ value3 has field<\/span>\r\n    \/\/ value4 has field<\/span>\r\n<\/code><\/pre>\n
4. \u52a8\u6001\u751f\u6210\u67e5\u8be2\u4ecegRPC\u6a21\u578b\u3002<\/h2>\n
\u7531\u4e8e\u4f7f\u7528Cassandra\u4f5c\u4e3a\u6570\u636e\u5b58\u50a8\uff0c\u56e0\u6b64\u9700\u8981\u5b9e\u73b0\u4e00\u79cd\u540d\u4e3aCQL\u7684\u81ea\u5b9a\u4e49\u67e5\u8be2\u8bed\u8a00\u6765\u5bf9Cassandra\u8868\u6267\u884cCRUD\u64cd\u4f5c\u3002<\/p>\n
\u7531\u4e8eCassandra\u7684CQL\u57fa\u672c\u4e0a\u662f\u57fa\u4e8eSQL\u7684\uff0c\u6240\u4ee5\u76f8\u5bf9\u8f83\u76f4\u89c2\u5730\u5b9e\u73b0\u662f\u53ef\u80fd\u7684\uff0c\u4f46\u662f\u4e3a\u4e86\u8fdb\u884c\u5e76\u53d1\u66f4\u65b0\u63a7\u5236\uff0c\u5f00\u53d1\u4eba\u5458\u9700\u8981\u610f\u8bc6\u5230CAS\u67e5\u8be2\u4ee5\u53ca\u5bf9\u6df1\u5c42\u6b21\u7684\u7ed3\u6784\u5c42\u6b21\uff08frozen UDT\uff09\u8fdb\u884c\u7684Update\u8bed\u53e5\u4ee5\u53caMap\u3001Set\u5143\u7d20\u7684\u6dfb\u52a0\u6216\u5220\u9664\u7b49\u65e0\u6cd5\u5728SQL\u4e2d\u8868\u793a\u7684\u67e5\u8be2\u3002\u4e3a\u4e86\u9690\u85cf\u5904\u7406\u8fc7\u7a0b\u5e76\u4f7f\u5176\u80fd\u591f\u901a\u8fc7\u5c06gRPC\u7684\u6a21\u578b\u7c7b\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u6570\u636e\u5b58\u50a8\u6765\u8fdb\u884cCRUD\u64cd\u4f5c\uff0c\u6211\u4eec\u5bf9\u5176\u8fdb\u884c\u4e86\u5c01\u88c5\u3002\uff08\u7c7b\u4f3c\u4e8eKVS\u7248ORM\/\u6620\u5c04\u5668\uff09<\/p>\n
\u5728\u8bbe\u8ba1\u5171\u901a\u5904\u7406 gRPC \u6a21\u578b\u65f6\uff0c\u5173\u952e\u662f\u901a\u8fc7\u4f7f\u7528 Message \u7c7b\u578b\u6765\u5904\u7406 FieldDescriptor\uff0c\u5728\u81ea\u5b9a\u4e49\u9009\u9879\u793a\u4f8b\u4e2d\u5df2\u7ecf\u8fdb\u884c\u4e86\u8bf4\u660e\u3002\u901a\u8fc7\u5229\u7528 Message \u7c7b\u578b\u6765\u64cd\u4f5c FieldDescriptor\uff0c\u53ef\u4ee5\u5b9e\u73b0\u52a8\u6001\u751f\u6210\u67e5\u8be2\u4ee5\u53ca\u5b9e\u73b0\u901a\u7528\u6027\u5904\u7406\u529f\u80fd\u3002\u56e0\u6b64\uff0c\u5728\u8bbe\u8ba1\u5171\u901a\u5904\u7406 gRPC \u6a21\u578b\u65f6\uff0c\u6211\u4eec\u9700\u8981\u610f\u8bc6\u5230\u4f7f\u7528 Message \u7c7b\u578b\u3002<\/p>\n
4.1 CQL\u7684SELECT\u8bed\u53e5\u5b9e\u73b0\u793a\u4f8b<\/h3>\n
\r\n    public<\/span> BuiltStatement<\/span> select<\/span>(<\/span>Message<\/span> message<\/span>)<\/span> {<\/span>\r\n        BuiltStatement<\/span> select<\/span>;<\/span>\r\n        try<\/span> {<\/span>\r\n            \/\/ \u30c6\u30fc\u30d6\u30eb\u540d\u30bb\u30c3\u30c8<\/span>\r\n            String<\/span> table<\/span> =<\/span> message<\/span>.<\/span>getDescriptorForType<\/span>().<\/span>getOptions<\/span>().<\/span>getExtension<\/span>(<\/span>CustomOption<\/span>.<\/span>entityOptions<\/span>)<\/span>\r\n                    .<\/span>getTableName<\/span>();<\/span>\r\n\r\n            \/\/ CQL\u751f\u6210<\/span>\r\n            Select<\/span>.<\/span>Selection<\/span> selection<\/span> =<\/span> QueryBuilder<\/span>.<\/span>select<\/span>();<\/span>\r\n            Map<\/span><<\/span>String<\/span>,<\/span> Object<\/span>><\/span> partitionKeyMap<\/span> =<\/span> new<\/span> HashMap<\/span><>();<\/span>\r\n\r\n            for<\/span> (<\/span>Descriptors<\/span>.<\/span>FieldDescriptor<\/span> fds<\/span> :<\/span> message<\/span>.<\/span>getDescriptorForType<\/span>().<\/span>getFields<\/span>())<\/span> {<\/span>\r\n\r\n                \/\/ SELECT\u53e5\u4f5c\u6210<\/span>\r\n                if<\/span> (<\/span>fds<\/span>.<\/span>getName<\/span>().<\/span>equals<\/span>(<\/span>\"select_enum\"<\/span>))<\/span> {<\/span>\r\n                    if<\/span> (<\/span>message<\/span>.<\/span>getRepeatedFieldCount<\/span>(<\/span>fds<\/span>)<\/span> ><\/span> 0<\/span>)<\/span> {<\/span>\r\n                        IntStream<\/span>.<\/span>range<\/span>(<\/span>0<\/span>,<\/span> message<\/span>.<\/span>getRepeatedFieldCount<\/span>(<\/span>fds<\/span>)).<\/span>forEach<\/span>(<\/span>\r\n                                i<\/span> -><\/span> selection<\/span>.<\/span>column<\/span>(<\/span>message<\/span>.<\/span>getRepeatedField<\/span>(<\/span>fds<\/span>,<\/span> i<\/span>).<\/span>toString<\/span>()));<\/span>\r\n                    }<\/span> else<\/span> {<\/span>\r\n                        selection<\/span>.<\/span>all<\/span>();<\/span>\r\n                    }<\/span>\r\n                }<\/span>\r\n\r\n                \/\/ \u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u30ad\u30fc\u62bd\u51fa<\/span>\r\n                if<\/span> (<\/span>fds<\/span>.<\/span>getOptions<\/span>().<\/span>getExtension<\/span>(<\/span>CustomOption<\/span>.<\/span>attributeOptions<\/span>).<\/span>getPartitionKey<\/span>()<\/span> ><\/span> 0<\/span>\r\n                        ||<\/span> fds<\/span>.<\/span>getOptions<\/span>().<\/span>getExtension<\/span>(<\/span>CustomOption<\/span>.<\/span>attributeOptions<\/span>).<\/span>getClusteringKey<\/span>()<\/span> ><\/span> 0<\/span>)<\/span> {<\/span>\r\n                    partitionKeyMap<\/span>.<\/span>put<\/span>(<\/span>fds<\/span>.<\/span>getName<\/span>(),<\/span> message<\/span>.<\/span>getField<\/span>(<\/span>fds<\/span>));<\/span>\r\n                }<\/span>\r\n            }<\/span>\r\n\r\n            \/\/ FROM\u53e5\u751f\u6210<\/span>\r\n            select<\/span> =<\/span> selection<\/span>.<\/span>json<\/span>().<\/span>from<\/span>(<\/span>getTableMetadata<\/span>(<\/span>table<\/span>));<\/span>\r\n\r\n            \/\/ WHERE\u53e5\u4f5c\u6210<\/span>\r\n            for<\/span> (<\/span>Map<\/span>.<\/span>Entry<\/span><<\/span>String<\/span>,<\/span> Object<\/span>><\/span> entry<\/span> :<\/span> partitionKeyMap<\/span>.<\/span>entrySet<\/span>())<\/span> {<\/span>\r\n\r\n                Object<\/span> value<\/span> =<\/span> entry<\/span>.<\/span>getValue<\/span>();<\/span>\r\n\r\n                if<\/span> (<\/span>value<\/span> instanceof<\/span> String<\/span>)<\/span> {<\/span>\r\n                    ((<\/span>Select<\/span>)<\/span> select<\/span>).<\/span>where<\/span>(<\/span>eq<\/span>(<\/span>entry<\/span>.<\/span>getKey<\/span>(),<\/span> value<\/span>));<\/span>\r\n                }<\/span> else<\/span> if<\/span> \r\n                    ...<\/span> \u578b\u5224\u5225\u51e6\u7406\u7701\u7565<\/span>\r\n                }<\/span> else<\/span> {<\/span>\r\n                    logger<\/span>.<\/span>debug<\/span>(<\/span>\"\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u306e\u578b\u304c\u4e0d\u6b63\u3067\u3059\"<\/span>);<\/span>\r\n                    throw<\/span> new<\/span> RuntimeException<\/span>(<\/span>\"unsupported type\"<\/span>);<\/span>\r\n                }<\/span>\r\n            }<\/span>\r\n            return<\/span> select<\/span>;<\/span>\r\n        }<\/span> catch<\/span> (<\/span>Exception<\/span> e<\/span>)<\/span> {<\/span>\r\n            e<\/span>.<\/span>printStackTrace<\/span>();<\/span>\r\n            throw<\/span> new<\/span> RuntimeException<\/span>(<\/span>e<\/span>);<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n<\/code><\/pre>\n
\u6211\u4eec\u4e0d\u4ec5\u4f7f\u7528Cassandra\uff0c\u8fd8\u5c06ElasticSearch\u4f5c\u4e3a\u5168\u6587\u641c\u7d22\u5f15\u64ce\u3002\u6211\u4eec\u8fd8\u5229\u7528\u4e0a\u8ff0\u7684Message\u7c7b\u4ecegRPC\u6a21\u578b\u4e2d\u52a8\u6001\u751f\u6210\u67e5\u8be2\uff0c\u4ee5\u5411ElasticSearch\u53d1\u9001\u67e5\u8be2\u3002\u8fd9\u6837\u8bbe\u8ba1\u4f7f\u5f97\u5e94\u7528\u5f00\u53d1\u8005\u65e0\u9700\u76f4\u63a5\u5b9e\u73b0\u67e5\u8be2\u64cd\u4f5c\uff0c\u5373\u53ef\u901a\u8fc7CRUD\u64cd\u4f5c\u5bf9\u6570\u636e\u5b58\u50a8\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n
5. \u5229\u7528gRPC\u6a21\u578b\u7684\u65b9\u4fbf\u5904\u7406\u6280\u5de7<\/h2>\n
\u867d\u7136\u5728\u4e4b\u524d\u7684\u4ecb\u7ecd\u4e2d\u6211\u4eec\u63d0\u5230\u8fc7\uff0c\u4f46\u5728\u5904\u7406gRPC\u6a21\u578b\u65f6\uff0c\u6709\u4e00\u4e9b\u63d0\u793a\u4f1a\u5f88\u6709\u5e2e\u52a9\u3002\u4e0b\u9762\u662f\u4e00\u4e9b\u63d0\u793a\u4f9b\u53c2\u8003\u3002
\n\u8bf7\u6ce8\u610f\uff0c\u8fd9\u6b21\u6211\u4eec\u662f\u4f7f\u7528gRPC-Java\u8fdb\u884c\u5b9e\u73b0\u7684\uff0c\u8bf7\u5c06\u5176\u4f5c\u4e3a\u5728\u5176\u4ed6\u8bed\u8a00\u4e2d\u8fdb\u884c\u5b9e\u73b0\u7684\u53c2\u8003\u3002<\/p>\n
\uff08\u56e0\u4e3a\u65f6\u95f4\u6709\u9650\uff0c\u6211\u4eec\u7a0d\u540e\u518d\u6dfb\u52a0\u63d0\u793a\u3002\u3002\u3002\uff09<\/p>\n
5-1. \u4ecegRPC\u6a21\u578b\u4ee5Json\u683c\u5f0f\u8f93\u51fa<\/h3>\n
\u4ecegRPC\u6a21\u578b\u4e2d\u8f93\u51faJson\u683c\u5f0f\u3002
\n\u5982\u679c\u52a0\u4e0apreservingProtoFieldNames\uff0c\u5c06\u6309\u7167proto\u4e2d\u5b9a\u4e49\u7684\u5b57\u6bb5\u540d\u8fdb\u884c\u8f93\u51fa\u3002
\n\u5982\u679c\u4e0d\u52a0preservingProtoFieldNames\uff0c\u5219\u5c06\u6309\u7167\u9a7c\u5cf0\u547d\u540d\u6cd5\u8fdb\u884c\u8f93\u51fa\uff0c\u6839\u636e\u7528\u9014\u8fdb\u884c\u9009\u62e9\u4f7f\u7528\u3002<\/p>\n
\r\nJsonFormat<\/span>.<\/span>printer<\/span>().<\/span>preservingProtoFieldNames<\/span>().<\/span>print<\/span>(<\/span>gRPC\u30e2\u30c7\u30eb<\/span>)<\/span> \/\/ proto\u5b9a\u7fa9\u306b\u6cbf\u3063\u305f\u30d5\u30a3\u30fc\u30eb\u30c9\u540d\u3067\u51fa\u529b<\/span>\r\nJsonFormat<\/span>.<\/span>printer<\/span>().<\/span>print<\/span>(<\/span>gRPC\u30e2\u30c7\u30eb<\/span>)<\/span> \/\/ camel\u30b1\u30fc\u30b9\u3067\u51fa\u529b<\/span>\r\n<\/code><\/pre>\n
5-2. \u5bf9\u4e8e gRPC \u6a21\u578b\u8fdb\u884c\u7c7b\u578b\u5224\u65ad<\/h3>\n
\r\nfor<\/span> (<\/span>Descriptors<\/span>.<\/span>FieldDescriptor<\/span> fds<\/span> :<\/span> gRPC\u30e2\u30c7\u30eb<\/span>.<\/span>getDescriptorForType<\/span>().<\/span>getFields<\/span>())<\/span> {<\/span>\r\n    if<\/span> (<\/span>fds<\/span>.<\/span>isMapField<\/span>())<\/span> {<\/span>\r\n        \/\/ \u30d5\u30a3\u30fc\u30eb\u30c9\u304cMap\u578b\u304b\u5224\u5b9a        <\/span>\r\n    }<\/span> else<\/span> if<\/span> (<\/span>fds<\/span>).<\/span>isRepeated<\/span>())<\/span> {<\/span>\r\n        \/\/ \u30d5\u30a3\u30fc\u30eb\u30c9\u304cSet\u578b\u304b\u5224\u5b9a<\/span>\r\n    }<\/span> else<\/span> {<\/span>\r\n        \/\/ \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u4ee5\u5916\u306e\u578b<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u901a\u8fc7\u6307\u5b9a\u5b57\u6bb5\u540d\u79f0\u4eceMessage\u7c7b\u4e2d\u83b7\u53d6\u503c\u3002<\/h3>\n
\r\nString<\/span> val<\/span> =<\/span> (<\/span>String<\/span>)<\/span> messageModel<\/span>.<\/span>getField<\/span>(<\/span>messageModel<\/span>.<\/span>getDescriptorForType<\/span>().<\/span>findFieldByName<\/span>(<\/span>\"\u30d5\u30a3\u30fc\u30eb\u30c9\u540d\"<\/span>));<\/span>\r\n<\/code><\/pre>\n
5-4. gRPC\u6a21\u578b\u4e4b\u95f4\u7684\u5408\u5e76<\/h3>\n
\u4e00\u4e2a\u5c06\u503c\u4ece\u4e00\u4e2a\u6a21\u578b\u5408\u5e76\u5230\u53e6\u4e00\u4e2a\u6a21\u578b\u7684\u793a\u4f8b\u3002\u901a\u8fc7\u4f7f\u7528.ignoreUnknownFields()\uff0c\u5373\u4f7f\u5408\u5e76\u76ee\u6807\u4e2d\u6ca1\u6709\u76f8\u5e94\u5b57\u6bb5\uff0c\u4e5f\u4f1a\u88ab\u5ffd\u7565\u3002<\/p>\n
\r\nJsonFormat<\/span>.<\/span>parser<\/span>().<\/span>ignoringUnknownFields<\/span>().<\/span>merge<\/span>(<\/span>\r\n        JsonFormat<\/span>.<\/span>printer<\/span>().<\/span>preservingProtoFieldNames<\/span>().<\/span>print<\/span>(<\/span>merge\u5143\u306e\u30e2\u30c7\u30eb<\/span>),<\/span>merge\u5148\u306e\u30e2\u30c7\u30eb<\/span>);<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u9996\u5148 \u8fd9\u662f2019\u5e74Future Advent Calendar 2\u7684\u7b2c22\u5929\u3002\u987a\u4fbf\u4e00\u63d0\uff0cAdvent Cal […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-50251","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u603b\u7ed3\u4e86\u5173\u4e8egRPC\u8bbe\u8ba1\u548c\u5f00\u53d1\u7684\u8981\u70b9 - 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\/\u603b\u7ed3\u4e86\u5173\u4e8egrpc\u8bbe\u8ba1\u548c\u5f00\u53d1\u7684\u8981\u70b9\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u603b\u7ed3\u4e86\u5173\u4e8egRPC\u8bbe\u8ba1\u548c\u5f00\u53d1\u7684\u8981\u70b9\" \/>\n<meta property=\"og:description\" content=\"\u9996\u5148 \u8fd9\u662f2019\u5e74Future Advent Calendar 2\u7684\u7b2c22\u5929\u3002\u987a\u4fbf\u4e00\u63d0\uff0cAdvent Cal […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u603b\u7ed3\u4e86\u5173\u4e8egrpc\u8bbe\u8ba1\u548c\u5f00\u53d1\u7684\u8981\u70b9\u3002\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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