{"id":34315,"date":"2022-12-30T22:24:37","date_gmt":"2023-02-06T10:36:12","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8graphql-subscriptions%e5%92%8credis-pubsub%e6%9d%a5%e5%88%9b%e5%bb%ba%e5%ae%9e%e6%97%b6%e8%81%8a%e5%a4%a9%e6%9c%8d%e5%8a%a1%e5%99%a8%e3%80%82\/"},"modified":"2024-04-29T07:44:47","modified_gmt":"2024-04-28T23:44:47","slug":"%e4%bd%bf%e7%94%a8graphql-subscriptions%e5%92%8credis-pubsub%e6%9d%a5%e5%88%9b%e5%bb%ba%e5%ae%9e%e6%97%b6%e8%81%8a%e5%a4%a9%e6%9c%8d%e5%8a%a1%e5%99%a8%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8graphql-subscriptions%e5%92%8credis-pubsub%e6%9d%a5%e5%88%9b%e5%bb%ba%e5%ae%9e%e6%97%b6%e8%81%8a%e5%a4%a9%e6%9c%8d%e5%8a%a1%e5%99%a8%e3%80%82\/","title":{"rendered":"\u4f7f\u7528GraphQL Subscriptions\u548cRedis PubSub\u6765\u521b\u5efa\u5b9e\u65f6\u804a\u5929\u670d\u52a1\u5668"},"content":{"rendered":"

\u9996\u5148<\/h1>\n
\"wt4f2-5jcn0.gif\"<\/div>\n

\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u4e3b\u8981\u4ecb\u7ecdGraphQL\u7684\u5b9e\u73b0\u91cd\u70b9\u3002\u6e90\u4ee3\u7801\u5df2\u7ecf\u4e0a\u4f20\u81f3GitHub\uff0c\u6240\u4ee5\u8bf7\u60a8\u4e5f\u4e00\u5e76\u67e5\u770b\u3002\u5982\u679c\u60a8\u67e5\u770bREADME.md\uff0c\u60a8\u53ef\u4ee5\u7acb\u5373\u5efa\u7acb\u4e00\u4e2a\u670d\u52a1\u5668\uff0c\u6240\u4ee5\u4e5f\u8bb8\u60a8\u53ef\u4ee5\u5148\u8bd5\u4e00\u8bd5\u3002<\/p>\n

\"undefined\"<\/div>\n

\u67b6\u6784<\/h1>\n
\"architecture_image.png\"<\/div>\n

\u524d\u7aef\u548c\u540e\u7aef\u4e4b\u95f4\u4f7f\u7528GraphQL\u8fdb\u884c\u901a\u4fe1\u3002
\n\u53d1\u9001\u6d88\u606f\u548c\u521b\u5efa\u7528\u6237\u4f7f\u7528\u666e\u901a\u7684GraphQL Mutation\uff0c\u63a5\u6536\u6d88\u606f\u4f7f\u7528\u5728Websocket\u4e0a\u8fd0\u884c\u7684GraphQL Subscriptions\u3002<\/p>\n

\u53e6\u5916\uff0c\u6211\u5011\u4f7f\u7528Redis\u7684PubSub\u529f\u80fd\u4f86\u50b3\u905e\u8a0a\u606f\u3002\u9019\u662f\u70ba\u4e86\u9632\u6b62\u7576GraphQL\u4f3a\u670d\u5668\u64f4\u5c55\u6642\uff0c\u804a\u5929\u5ba4\u88ab\u5206\u5272\u6210\u4e0d\u540c\u7684\u90e8\u5206\u3002<\/p>\n

GraphQL Subscriptions\u662f\u4e00\u79cd\u5b9e\u65f6\u6570\u636e\u4f20\u8f93\u534f\u8bae\u3002<\/h2>\n

\u6211\u8ba4\u4e3a\u5f88\u591a\u4eba\u542c\u8bf4\u8fc7GraphQL\u3002
\nGraphQL Subscriptions\u662f\u4e00\u79cdPubSub\u901a\u4fe1\u673a\u5236\uff0c\u5728Websocket\u4e0a\u6309\u7167GraphQL\u6a21\u5f0f\u8fdb\u884c\u6570\u636e\u4ea4\u6362\u3002<\/p>\n

\u4e0e\u4f7f\u7528\u539f\u59cb\u7684WebSocket\u901a\u4fe1\u76f8\u6bd4\uff0cgRPC\u7b49\u5176\u4ed6\u534f\u8bae\uff0c\u5b83\u5177\u6709\u7c7b\u578b\u5b89\u5168\u7684\u901a\u4fe1\u80fd\u529b\uff0c\u5e76\u4e14\u66f4\u6613\u4e8e\u5728\u6d4f\u89c8\u5668\u4e2d\u4f7f\u7528\u3002<\/p>\n

\u8ba2\u9605\u670d\u52a1 | Apollo Client<\/p>\n

Redis PubSub \u662f\u4e00\u79cd\u6d88\u606f\u4f20\u9012\u673a\u5236\u3002<\/h2>\n

Redis\u88ab\u5e7f\u6cdb\u7528\u4f5c\u5185\u5b58\u952e\u503c\u5b58\u50a8\u7cfb\u7edf\uff0c\u5e76\u62e5\u6709\u53d1\u5e03\u8ba2\u9605\u529f\u80fd\u3002
\n\u4e3a\u4e86\u5b9e\u73b0GraphQL\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u540c\u6b65\uff0c\u6211\u4eec\u5229\u7528\u4e86\u53d1\u5e03\u8ba2\u9605\u529f\u80fd\u3002<\/p>\n

\u6211\u6700\u8fd1\u624d\u77e5\u9053Redis\u7684PubSub\u529f\u80fd\uff0c\u4f46\u5927\u578b\u7684\u5e73\u53f0\u5982LINE LIVE\u7684\u804a\u5929\u670d\u52a1\u5668\u4f3c\u4e4e\u4e5f\u5728\u4f7f\u7528Redis\u7684PubSub\u529f\u80fd\u3002
\nLINE LIVE\u7684\u804a\u5929\u529f\u80fd\u5728\u5904\u7406\u6bcf\u5206\u949f\u8d85\u8fc730,000\u6761\u8bc4\u8bba\u6295\u7a3f\u4e4b\u524d\u4e0d\u4f1a\u91c7\u7528\u8fd9\u4e2a\u529f\u80fd\u3002<\/p>\n

\u6267\u884c<\/h1>\n

\u8fd9\u6b21\u6211\u4eec\u5c06\u4f7f\u7528Golang\u6765\u5b9e\u73b0GraphQL\u670d\u52a1\u5668\u3002<\/p>\n

\u5b9a\u4e49GraphQL\u7684\u6a21\u5f0f<\/h2>\n

\u9996\u5148\uff0c\u6211\u4eec\u5c06\u5b9a\u4e49GraphQL\u7684\u6a21\u5f0f\u3002<\/p>\n

type<\/span> Message<\/span> {<\/span>\r\n    user<\/span>:<\/span> String<\/span>!<\/span>\r\n    message<\/span>:<\/span> String<\/span>!<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> Mutation<\/span> {<\/span>\r\n    #\u30c1\u30e3\u30c3\u30c8\u3092\u6295\u7a3f\u3059\u308b<\/span>\r\n    postMessage<\/span>(<\/span>user<\/span>:<\/span> String<\/span>!,<\/span> message<\/span>:<\/span> String<\/span>!):<\/span> Message<\/span> \r\n    #\u30e6\u30fc\u30b6\u30fc\u3092\u4f5c\u6210\u3059\u308b(\u4f5c\u6210\u3055\u308c\u3066\u3044\u306a\u3044\u30e6\u30fc\u30b6\u30fc\u3067\u306f\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u53d7\u4fe1\u3084\u6295\u7a3f\u304c\u51fa\u6765\u306a\u3044)<\/span>\r\n    createUser<\/span>(<\/span>user<\/span>:<\/span> String<\/span>!):<\/span> String<\/span>!<\/span> \r\n}<\/span>\r\n\r\ntype<\/span> Query<\/span> {<\/span>\r\n    users<\/span>:<\/span> [<\/span>String<\/span>!]!<\/span>\r\n}<\/span>\r\n\r\n# \u3053\u306e\u90e8\u5206\u3067Subscription\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\u3002<\/span>\r\n# \u5f15\u6570\u3092\u6307\u5b9a\u3057\u3066Subscribe\u3092\u3059\u308b\u3068\u3001\u30b5\u30fc\u30d0\u30fc\u304b\u3089Publish\u3055\u308c\u308b\u30c7\u30fc\u30bf\u3092\u53d7\u3051\u53d6\u308c\u307e\u3059\u3002<\/span>\r\ntype<\/span> Subscription<\/span> {<\/span>\r\n    messagePosted<\/span>(<\/span>user<\/span>:<\/span> String<\/span>!):<\/span> Message<\/span>!<\/span>\r\n    userJoined<\/span>(<\/span>user<\/span>:<\/span> String<\/span>!):<\/span> String<\/span>!<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4ece\u6a21\u5f0f\u4e2d\u521b\u5efa\u63a5\u53e3<\/h2>\n
\u5b9e\u73b0GraphQL\u7684Resolver\uff08\u5904\u7406\u8bf7\u6c42\u7684\u90e8\u5206\uff09\u4ece\u5934\u5f00\u59cb\u662f\u5f88\u56f0\u96be\u7684\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u5de5\u5177\uff0c\u5c06GraphQL\u7684\u6a21\u5f0f\u8f93\u51fa\u4e3aGolang\u7684interface\u3002\u8fd9\u6b21\u6211\u4eec\u5c06\u4f7f\u7528\u652f\u6301GraphQL Subscriptions\u7684gqlgen\u5de5\u5177\u3002<\/p>\n
go get -u<\/span> github.com\/99designs\/gqlgen\/cmd\r\n<\/code><\/pre>\n
\u9996\u5148\uff0c\u521b\u5efa\u4e00\u4e2a\u7528\u4e8e\u8fd0\u884cgqlgen\u7684\u811a\u672c\u3002<\/p>\n
package<\/span> main<\/span>\r\n\r\nimport<\/span> \"github.com\/99designs\/gqlgen\/cmd\"<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n    cmd<\/span>.<\/span>Execute<\/span>()<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u63a5\u4e0b\u6765\uff0c\u6267\u884c\u8be5\u811a\u672c\u3002<\/p>\n
cd <\/span>grapqh\r\ngo run scripts\/gqlgen.go init\r\n<\/code><\/pre>\n
\u7136\u540e\u4f1a\u751f\u6210\u4e00\u4e9b\u6587\u4ef6\u3002\u6700\u91cd\u8981\u7684\u662fresolver.go\u3002
\n\u521a\u751f\u6210\u7684\u6587\u4ef6\u4e2d\u53ea\u6709\u4e00\u4e2a\u5f15\u53d1panic()\u7684\u57fa\u672c\u5b9e\u73b0\uff0c\u6240\u4ee5\u6211\u4eec\u8981\u5c06\u5176\u6309\u7167\u63a5\u53e3\u8981\u6c42\u8fdb\u884c\u5b9e\u73b0\u3002<\/p>\n
\u5b9e\u73b0Resolver<\/h2>\n
\"undefined\"<\/div>\n
\u751f\u6210\u5b9e\u4f53<\/h3>\n
type<\/span> Resolver<\/span> struct<\/span> {<\/span>\r\n    redisClient<\/span>     *<\/span>redis<\/span>.<\/span>Client<\/span> \/\/redis\u3078\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306e\u306b\u4f7f\u7528<\/span>\r\n    messageChannels<\/span> map<\/span>[<\/span>string<\/span>]<\/span>chan<\/span> Message<\/span>\r\n    userChannels<\/span>    map<\/span>[<\/span>string<\/span>]<\/span>chan<\/span> string<\/span>\r\n    mutex<\/span>           sync<\/span>.<\/span>Mutex<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> newResolver<\/span>(<\/span>redisClient<\/span> *<\/span>redis<\/span>.<\/span>Client<\/span>)<\/span> *<\/span>Resolver<\/span> {<\/span>\r\n    return<\/span> &<\/span>Resolver<\/span>{<\/span>\r\n        redisClient<\/span>:<\/span>     redisClient<\/span>,<\/span>\r\n        messageChannels<\/span>:<\/span> map<\/span>[<\/span>string<\/span>]<\/span>chan<\/span> Message<\/span>{},<\/span>\r\n        userChannels<\/span>:<\/span>    map<\/span>[<\/span>string<\/span>]<\/span>chan<\/span> string<\/span>{},<\/span>\r\n        mutex<\/span>:<\/span>           sync<\/span>.<\/span>Mutex<\/span>{},<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u56e0\u4e3a\u6bcf\u4e2a\u7528\u6237\u7684\u8fde\u63a5\u90fd\u8981\u901a\u8fc7 channels \u8fdb\u884c\u7ba1\u7406\uff0c\u6240\u4ee5\u6211\u4eec\u5c06\u5728\u7ed3\u6784\u4f53\u4e2d\u6dfb\u52a0\u4e00\u4e2a channels \u7684\u6620\u5c04\u5173\u7cfb\u3002<\/p>\n
\u5b9e\u65bd\u7559\u8a00\u53d1\u5e03\u7684\u529f\u80fd<\/h3>\n
type<\/span> mutationResolver<\/span> struct<\/span>{<\/span> *<\/span>Resolver<\/span> }<\/span>\r\n\r\nfunc<\/span> (<\/span>r<\/span> *<\/span>mutationResolver<\/span>)<\/span> PostMessage<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> user<\/span> string<\/span>,<\/span> message<\/span> string<\/span>)<\/span> (<\/span>*<\/span>Message<\/span>,<\/span> error<\/span>)<\/span> {<\/span>\r\n    isLogined<\/span>,<\/span> err<\/span> :=<\/span> r<\/span>.<\/span>checkLogin<\/span>(<\/span>user<\/span>)<\/span>\r\n    if<\/span> !<\/span>isLogined<\/span> {<\/span>\r\n        return<\/span> nil<\/span>,<\/span> errors<\/span>.<\/span>New<\/span>(<\/span>\"This user does not exists\"<\/span>)<\/span>\r\n    }<\/span>\r\n    \/\/ \u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u306fAFK(Away From Keyboard)\u5bfe\u7b56\u306760min\u3067\u524a\u9664\u3055\u308c\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u3002<\/span>\r\n    \/\/ \u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u6295\u7a3f\u3092\u884c\u3063\u305f\u5834\u5408\u306fExpire\u307e\u3067\u306e\u6642\u9593\u3092\u30ea\u30bb\u30c3\u30c8\u3059\u308b\u3002<\/span>\r\n    val<\/span>,<\/span> err<\/span> :=<\/span> r<\/span>.<\/span>redisClient<\/span>.<\/span>SetXX<\/span>(<\/span>user<\/span>,<\/span> user<\/span>,<\/span> 60<\/span>*<\/span>time<\/span>.<\/span>Minute<\/span>)<\/span>.<\/span>Result<\/span>()<\/span>\r\n    if<\/span> val<\/span> ==<\/span> false<\/span> {<\/span>\r\n        return<\/span> nil<\/span>,<\/span> errors<\/span>.<\/span>New<\/span>(<\/span>\"This user does not exists\"<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    \/\/ \u4ee5\u4e0b\u306e\u90e8\u5206\u3067\u3001[]byte\u306b\u5909\u63db\u3057\u305fMessage\u3092redis\u306ePubSub\u3067\u914d\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002<\/span>\r\n    m<\/span> :=<\/span> Message<\/span>{<\/span>\r\n        User<\/span>:<\/span>    user<\/span>,<\/span>\r\n        Message<\/span>:<\/span> message<\/span>,<\/span>\r\n    }<\/span>\r\n    mb<\/span>,<\/span> err<\/span> :=<\/span> json<\/span>.<\/span>Marshal<\/span>(<\/span>m<\/span>)<\/span>\r\n    r<\/span>.<\/span>redisClient<\/span>.<\/span>Publish<\/span>(<\/span>\"room\"<\/span>,<\/span> mb<\/span>)<\/span>\r\n    return<\/span> &<\/span>m<\/span>,<\/span> nil<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5b9e\u73b0\u8ba2\u9605\u670d\u52a1<\/h3>\n
type<\/span> subscriptionResolver<\/span> struct<\/span>{<\/span> *<\/span>Resolver<\/span> }<\/span>\r\n\r\nfunc<\/span> (<\/span>r<\/span> *<\/span>subscriptionResolver<\/span>)<\/span> MessagePosted<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> user<\/span> string<\/span>)<\/span> (<\/span><-<\/span>chan<\/span> Message<\/span>,<\/span> error<\/span>)<\/span> {<\/span>\r\n    isLogined<\/span>,<\/span> err<\/span> :=<\/span> r<\/span>.<\/span>checkLogin<\/span>(<\/span>user<\/span>)<\/span>\r\n    if<\/span> !<\/span>isLogined<\/span> {<\/span>\r\n        return<\/span> nil<\/span>,<\/span> errors<\/span>.<\/span>New<\/span>(<\/span>\"This user has not been created\"<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    messageChan<\/span> :=<\/span> make<\/span>(<\/span>chan<\/span> Message<\/span>,<\/span> 1<\/span>)<\/span>\r\n    r<\/span>.<\/span>mutex<\/span>.<\/span>Lock<\/span>()<\/span>\r\n    r<\/span>.<\/span>messageChannels<\/span>[<\/span>user<\/span>]<\/span> =<\/span> messageChan<\/span>\r\n    r<\/span>.<\/span>mutex<\/span>.<\/span>Unlock<\/span>()<\/span>\r\n\r\n    go<\/span> func<\/span>()<\/span> {<\/span>\r\n        <-<\/span>ctx<\/span>.<\/span>Done<\/span>()<\/span>\r\n        r<\/span>.<\/span>mutex<\/span>.<\/span>Lock<\/span>()<\/span>\r\n        delete<\/span>(<\/span>r<\/span>.<\/span>messageChannels<\/span>,<\/span> user<\/span>)<\/span>\r\n        r<\/span>.<\/span>mutex<\/span>.<\/span>Unlock<\/span>()<\/span>\r\n        r<\/span>.<\/span>redisClient<\/span>.<\/span>Del<\/span>(<\/span>user<\/span>)<\/span>\r\n    }()<\/span>\r\n    return<\/span> messageChan<\/span>,<\/span> nil<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u9700\u8981\u4e3a\u6bcf\u4e2a\u7528\u6237\u751f\u6210MessagePosted\u9891\u9053\u5e76\u8fd4\u56de\u3002
\n\u5c06\u6570\u636e\u6d41\u5165\u8be5\u9891\u9053\u540e\uff0c\u4f1a\u5411\u6bcf\u4e2a\u7528\u6237\u5206\u53d1\u6570\u636e\uff0c\u56e0\u6b64\u6211\u4eec\u5c06\u5728Resolver\u4e2d\u4fdd\u6301\u8be5\u9891\u9053\uff0c\u4ee5\u4fbf\u4ee5\u540e\u4f7f\u7528\u3002<\/p>\n
\u53e6\u5916\uff0c\u5728goroutine\u4e2d\uff0c\u6211\u4eec\u8fd8\u63cf\u8ff0\u4e86\u5f53\u8fde\u63a5\u65ad\u5f00\u65f6\u7684\u5904\u7406\u65b9\u6cd5\u3002\u6211\u4eec\u4f1a\u5220\u9664\u4e0d\u518d\u9700\u8981\u7684\u901a\u9053\u548cRedis\u7528\u6237\u6570\u636e\u3002<\/p>\n
\u63a5\u6536\u7531Redis\u53d1\u5e03\u7684\u6d88\u606f<\/h3>\n
func<\/span> (<\/span>r<\/span> *<\/span>Resolver<\/span>)<\/span> startSubscribingRedis<\/span>()<\/span> {<\/span>\r\n    go<\/span> func<\/span>()<\/span> {<\/span>\r\n        pubsub<\/span> :=<\/span> r<\/span>.<\/span>redisClient<\/span>.<\/span>Subscribe<\/span>(<\/span>\"room\"<\/span>)<\/span>\r\n        defer<\/span> pubsub<\/span>.<\/span>Close<\/span>()<\/span>\r\n\r\n        for<\/span> {<\/span>\r\n            msgi<\/span>,<\/span> err<\/span> :=<\/span> pubsub<\/span>.<\/span>Receive<\/span>()<\/span>\r\n            switch<\/span> msg<\/span> :=<\/span> msgi<\/span>.<\/span>(<\/span>type<\/span>)<\/span> {<\/span>\r\n            case<\/span> *<\/span>redis<\/span>.<\/span>Message<\/span>:<\/span>\r\n                \/\/ Convert recieved string to Message.<\/span>\r\n                m<\/span> :=<\/span> Message<\/span>{}<\/span>\r\n                if<\/span> err<\/span> :=<\/span> json<\/span>.<\/span>Unmarshal<\/span>([]<\/span>byte<\/span>(<\/span>msg<\/span>.<\/span>Payload<\/span>),<\/span> &<\/span>m<\/span>);<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n                    log<\/span>.<\/span>Println<\/span>(<\/span>err<\/span>)<\/span>\r\n                    continue<\/span>\r\n                }<\/span>\r\n                \/\/ Notify new message.<\/span>\r\n                r<\/span>.<\/span>mutex<\/span>.<\/span>Lock<\/span>()<\/span>\r\n                for<\/span> _<\/span>,<\/span> ch<\/span> :=<\/span> range<\/span> r<\/span>.<\/span>messageChannels<\/span> {<\/span>\r\n                    ch<\/span> <-<\/span> m<\/span>\r\n                }<\/span>\r\n                r<\/span>.<\/span>mutex<\/span>.<\/span>Unlock<\/span>()<\/span>\r\n            default<\/span>:<\/span>\r\n            }<\/span>\r\n        }<\/span>\r\n    }()<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u4eceRedis\u63a5\u6536\u5230\u7684\u6d88\u606f\u662fMessage\u7c7b\u578b\uff0c\u5c31\u5c06\u5176\u8f6c\u6362\u4e3a\u7ed3\u6784\u4f53\u5e76\u6d41\u5165\u901a\u9053\u4e2d\u3002
\n\u5728\u6d41\u5165\u901a\u9053\u4e4b\u540e\uff0c\u5e93\u4f1a\u5e2e\u52a9\u5ba2\u6237\u7aef\u53d1\u9001\u6570\u636e\uff08\u975e\u5e38\u65b9\u4fbf?\uff09\u3002<\/p>\n
\u521b\u5efa\u670d\u52a1\u5668<\/h2>\n
\u5f53\u8fd0\u884c scripts\/gqlgen.go init \u547d\u4ee4\u65f6\uff0c\u5c06\u81ea\u52a8\u521b\u5efa graphql\/server\/server.go \u6587\u4ef6\uff0c\u4f46\u8fd9\u6b21\u6211\u4eec\u5df2\u5c06\u5176\u5220\u9664\u5e76\u91cd\u65b0\u7f16\u5199\u5230\u53e6\u4e00\u4e2a\u4f4d\u7f6e\u3002<\/p>\n
\u56e0\u4e3a\u6211\u5e0c\u671b\u5c06”package main”\u653e\u5728\u9879\u76ee\u6839\u76ee\u5f55\u4e0b\u3002<\/p>\n
type<\/span> GraphQLServer<\/span> struct<\/span> {<\/span>\r\n    redisClient<\/span> *<\/span>redis<\/span>.<\/span>Client<\/span>\r\n}<\/span>\r\n\r\n\/\/ NewGraphQLServer returns GraphQL server.<\/span>\r\nfunc<\/span> NewGraphQLServer<\/span>(<\/span>redisClient<\/span> *<\/span>redis<\/span>.<\/span>Client<\/span>)<\/span> *<\/span>GraphQLServer<\/span> {<\/span>\r\n    return<\/span> &<\/span>GraphQLServer<\/span>{<\/span>\r\n        redisClient<\/span>:<\/span> redisClient<\/span>,<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n\/\/ Serve starts GraphQL server.<\/span>\r\nfunc<\/span> (<\/span>s<\/span> *<\/span>GraphQLServer<\/span>)<\/span> Serve<\/span>(<\/span>route<\/span> string<\/span>,<\/span> port<\/span> int<\/span>)<\/span> error<\/span> {<\/span>\r\n    mux<\/span> :=<\/span> http<\/span>.<\/span>NewServeMux<\/span>()<\/span>\r\n    mux<\/span>.<\/span>Handle<\/span>(<\/span>\r\n        route<\/span>,<\/span>\r\n        handler<\/span>.<\/span>GraphQL<\/span>(<\/span>graphql<\/span>.<\/span>NewExecutableSchema<\/span>(<\/span>graphql<\/span>.<\/span>NewGraphQLConfig<\/span>(<\/span>s<\/span>.<\/span>redisClient<\/span>)),<\/span>\r\n            handler<\/span>.<\/span>WebsocketUpgrader<\/span>(<\/span>websocket<\/span>.<\/span>Upgrader<\/span>{<\/span>\r\n                CheckOrigin<\/span>:<\/span> func<\/span>(<\/span>r<\/span> *<\/span>http<\/span>.<\/span>Request<\/span>)<\/span> bool<\/span> {<\/span>\r\n                    return<\/span> true<\/span>\r\n                },<\/span>\r\n            }),<\/span>\r\n        ),<\/span>\r\n    )<\/span>\r\n    mux<\/span>.<\/span>Handle<\/span>(<\/span>\"\/\"<\/span>,<\/span> handler<\/span>.<\/span>Playground<\/span>(<\/span>\"GraphQL playground\"<\/span>,<\/span> route<\/span>))<\/span>\r\n    handler<\/span> :=<\/span> cors<\/span>.<\/span>AllowAll<\/span>()<\/span>.<\/span>Handler<\/span>(<\/span>mux<\/span>)<\/span>\r\n    return<\/span> http<\/span>.<\/span>ListenAndServe<\/span>(<\/span>fmt<\/span>.<\/span>Sprintf<\/span>(<\/span>\":%d\"<\/span>,<\/span> port<\/span>),<\/span> handler<\/span>)<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
type<\/span> config<\/span> struct<\/span> {<\/span>\r\n    RedisURL<\/span> string<\/span> `envconfig:\"REDIS_URL\"`<\/span>\r\n    Port<\/span>     int<\/span>    `envconfig:\"PORT\"`<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n    var<\/span> config<\/span> config<\/span>\r\n    err<\/span> :=<\/span> envconfig<\/span>.<\/span>Process<\/span>(<\/span>\"\"<\/span>,<\/span> &<\/span>config<\/span>)<\/span>\r\n\r\n    client<\/span>,<\/span> err<\/span> :=<\/span> infrastructure<\/span>.<\/span>NewRedisClient<\/span>(<\/span>config<\/span>.<\/span>RedisURL<\/span>)<\/span>\r\n    defer<\/span> client<\/span>.<\/span>Close<\/span>()<\/span>\r\n\r\n    s<\/span> :=<\/span> infrastructure<\/span>.<\/span>NewGraphQLServer<\/span>(<\/span>client<\/span>)<\/span>\r\n    log<\/span>.<\/span>Fatal<\/span>(<\/span>s<\/span>.<\/span>Serve<\/span>(<\/span>\"\/query\"<\/span>,<\/span> config<\/span>.<\/span>Port<\/span>))<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u521b\u5efa\u6bcf\u4e2a\u7ed3\u6784\u4f53\u5e76\u542f\u52a8\u670d\u52a1\u5668\u3002<\/p>\n
\u4f7f\u7528docker-compose\u542f\u52a8GraphQL\u670d\u52a1\u5668\u548cRedis\u670d\u52a1\u5668\u3002<\/h2>\n
\u6700\u7ec8\uff0c\u4f7f\u7528Docker\u6765\u542f\u52a8\u670d\u52a1\u5668\u3002<\/p>\n
FROM<\/span> golang:1.11.4<\/span>\r\n\r\nWORKDIR<\/span> \/go\/src\/github.com\/p1ass\/graphql-redis-realtime-chat<\/span>\r\nCOPY<\/span> . .<\/span>\r\nENV<\/span> GO111MODULE=on<\/span>\r\n\r\nRUN <\/span>go get github.com\/pilu\/fresh\r\n<\/code><\/pre>\n
version<\/span>:<\/span> '<\/span>3'<\/span>\r\nvolumes<\/span>:<\/span>\r\n    unsync<\/span>:<\/span>\r\nservices<\/span>:<\/span>\r\n    api<\/span>:<\/span>\r\n        build<\/span>:<\/span> .<\/span>\r\n        volumes<\/span>:<\/span>\r\n            -<\/span> .\/:\/go\/src\/github.com\/p1ass\/graphql-redis-realtime-chat<\/span>\r\n            -<\/span> unsync:\/go\/src\/github.com\/p1ass\/graphql-redis-realtime-chat\/frontend<\/span>\r\n        ports<\/span>:<\/span>\r\n            -<\/span> '<\/span>8080:8080'<\/span>\r\n        depends_on<\/span>:<\/span>\r\n            -<\/span> redis<\/span>\r\n\r\n        command<\/span>:<\/span> fresh<\/span>\r\n\r\n        environment<\/span>:<\/span>\r\n            REDIS_URL<\/span>:<\/span> '<\/span>redis:6379'<\/span>\r\n            PORT<\/span>:<\/span> '<\/span>8080'<\/span>\r\n    redis<\/span>:<\/span>\r\n        image<\/span>:<\/span> redis:latest<\/span>\r\n        ports<\/span>:<\/span>\r\n            -<\/span> '<\/span>6379:6379'<\/span>\r\n<\/code><\/pre>\n
\u6211\u4eec\u4f7f\u7528fresh\u5b9e\u73b0\u4e86\u5728\u70ed\u91cd\u8f7d\u73af\u5883\u4e2d\u8fdb\u884c\u5f00\u53d1\u7684\u80fd\u529b\u3002\u6b64\u5916\uff0c\u4e3a\u4e86\u9632\u6b62\u6302\u8f7d\u65e0\u7528\u7684\u76ee\u5f55\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u4e3aunsync\u7684\u865a\u62df\u5377\u3002\u5728\u6b64\u4e4b\u540e\uff0c\u4e00\u65e6\u542f\u52a8\u5c31\u5b8c\u6210\u4e86\u3002<\/p>\n
docker-compose up\r\n<\/code><\/pre>\n
\u5728\u6d4f\u89c8\u5668\u4e2d\u6253\u5f00http:\/\/localhost:\u3010PORT\u3011\uff0cGraphQL Playground\u5c06\u4f1a\u5f00\u542f\uff0c\u53ef\u7528\u4e8e\u5c1d\u8bd5Query\u3001Mutation\u548cSubscription\u3002<\/p>\n
\u989d\u5916\u5185\u5bb9\uff1a\u521b\u5efaNuxt.js\u7684\u5ba2\u6237\u7aef\u3002<\/h1>\n
\u5728GraphQL Playground\u4e0a\u53ef\u4ee5\u5c1d\u8bd5\u5305\u62ec\u8ba2\u9605\u5728\u5185\u7684\u6240\u6709\u5185\u5bb9\uff0c\u4f46\u4e3a\u4e86\u4f7f\u5176\u66f4\u50cf\u4e00\u4e2aWeb\u5e94\u7528\u7a0b\u5e8f\uff0c\u6211\u4f7f\u7528Nuxt.js\u521b\u5efa\u4e86\u4e00\u4e2a\u5ba2\u6237\u7aef\u3002<\/p>\n
\u6211\u4eec\u53c2\u8003\u4e86\u4ee5\u4e0b\u6587\u7ae0\u6765\u5b9e\u73b0\u3002
\n\u4f7f\u7528 GraphQL \u548c Nuxt.js \u521b\u5efa\u804a\u5929\u8f7d\u4f53\u3002<\/p>\n
\u5b9e\u9645\u4e0a\uff0c\u51e0\u4e4e\u6240\u6709\u5b9e\u65bd\u65b9\u6cd5\u90fd\u76f8\u540c\uff0c\u4f46\u8fd8\u6709\u4e00\u4e2a\u7a0d\u6709\u4e0d\u540c\u7684\u5730\u65b9\u9700\u8981\u4ecb\u7ecd\u4e00\u4e0b\u3002<\/p>\n
\u7b80\u5355\u8ba2\u9605<\/h3>\n
\u7b80\u5355\u8ba2\u9605 | Vue Apollo<\/p>\n
GraphQL\u7684\u8ba2\u9605\uff08Subscription\uff09\u7ecf\u5e38\u7528\u4e8e\u4e0e\u53e6\u4e00\u4e2a\u67e5\u8be2\uff08Query\uff09\u4ea4\u6362\u76f8\u540c\u7c7b\u578b\u7684\u6570\u636e\u3002
\n\u4f46\u662f\uff0c\u8fd9\u6b21\u7684postMessage\u5e76\u6ca1\u6709\u4e0e\u4efb\u4f55\u67e5\u8be2\u76f8\u5173\u8054\u3002
\n\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u5c06\u4e0d\u4f7f\u7528\u5e38\u89c4\u7684subscribeToMore\u6765\u5b9e\u73b0\uff0c\u800c\u662f\u4f7f\u7528$subscribe\u6765\u5b9e\u73b0\u3002<\/p>\n
import<\/span> SMessagePosted<\/span> from<\/span> '<\/span>@\/apollo\/subscriptions\/messagePosted.gql<\/span>'<\/span>\r\n\r\napollo<\/span>:<\/span> {<\/span>\r\n    \/\/ Query\u306b\u7d10\u4ed8\u3044\u3066\u3044\u308bSubscription<\/span>\r\n    users<\/span>:<\/span> {<\/span>\r\n        query<\/span>:<\/span> QUsers<\/span>,<\/span>\r\n        subscribeToMore<\/span>:<\/span> {<\/span>\r\n            document<\/span>:<\/span> SUserJoined<\/span>,<\/span>\r\n            variables<\/span>()<\/span> {<\/span>\r\n                return<\/span> {<\/span>\r\n                    user<\/span>:<\/span> this<\/span>.<\/span>user<\/span>\r\n                }<\/span>\r\n            },<\/span>\r\n            updateQuery<\/span>:<\/span> (<\/span>prev<\/span>,<\/span> {<\/span> subscriptionData<\/span> })<\/span> =><\/span> {<\/span>\r\n                \/\/ do something<\/span>\r\n            }<\/span>\r\n        }<\/span>\r\n    },<\/span>\r\n\r\n    \/\/ Query\u306b\u7d10\u4ed8\u3044\u3066\u3044\u306a\u3044Subscription<\/span>\r\n    $subscribe<\/span>:<\/span> {<\/span>\r\n        messagePosted<\/span>:<\/span> {<\/span>\r\n            query<\/span>:<\/span> SMessagePosted<\/span>,<\/span>\r\n            variables<\/span>()<\/span> {<\/span>\r\n                return<\/span> {<\/span>\r\n                    user<\/span>:<\/span> this<\/span>.<\/span>user<\/span>\r\n                }<\/span>\r\n            },<\/span>\r\n            result<\/span>(<\/span>res<\/span>)<\/span> {<\/span>\r\n                this<\/span>.<\/span>messages<\/span>.<\/span>unshift<\/span>(<\/span>res<\/span>.<\/span>data<\/span>.<\/span>messagePosted<\/span>)<\/span>\r\n            }<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u603b\u7ed3<\/h1>\n
    \n
  • \n
      GraphQL Subscriptions\u3092\u4f7f\u3046\u3068\u3001\u578b\u306b\u6cbf\u3063\u305f\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u901a\u4fe1\u304c\u3067\u304d\u308b<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          Redis PubSub\u3092\u4f7f\u3046\u3068\u8907\u6570\u53f0\u30b5\u30fc\u30d0\u30fc\u306e\u6642\u306b\u30c7\u30fc\u30bf\u306e\u540c\u671f\u304c\u3067\u304d\u308b<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            Query\u3068\u7d10\u4ed8\u304b\u306a\u3044Subscription\u3092\u4f5c\u6210\u3059\u308b\u3068\u304d\u306f\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u5b9f\u88c5\u306b\u6ce8\u610f\u3057\u3088\u3046(vue-apollo\u306e\u5834\u5408)<\/ul>\n
            \u8bf7\u53c2\u8003<\/h1>\n
              \n
            • \n
                Real-time Chat with GraphQL Subscriptions in Go<\/ul>\n<\/li>\n<\/ul>\n
                 <\/p>\n
                  \n
                • \n
                    Go\u3068Redis\u306b\u304a\u3051\u308b\u7c21\u5358\u306a\u30c1\u30e3\u30c3\u30c8\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/ul>\n<\/li>\n<\/ul>\n
                     <\/p>\n
                      \n
                    • \n
                        Redis \u306e Pub\/Sub \u3092\u4f7f\u3063\u3066 Node.js + WebSocket \u306e\u30b9\u30b1\u30fc\u30eb\u30a2\u30a6\u30c8\u3092\u5b9f\u73fe\u3059\u308b\u65b9\u6cd5<\/ul>\n<\/li>\n<\/ul>\n
                         <\/p>\n
                          \n
                        • \n
                            Apollo inside of NuxtJS<\/ul>\n<\/li>\n<\/ul>\n
                             <\/p>\n
                              \n
                            • \n
                                GraphQL \u3068 Nuxt.js \u3067\u30c1\u30e3\u30c3\u30c8\u3092\u4f5c\u308b<\/ul>\n<\/li>\n<\/ul>\n
                                 <\/p>\n
                                  Docker\u3067Volume\u3092\u30de\u30a6\u30f3\u30c8\u3059\u308b\u3068\u304d\u4e00\u90e8\u3092\u9664\u5916\u3059\u308b\u65b9\u6cd5<\/ul>\n","protected":false},"excerpt":{"rendered":"
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