{"id":43576,"date":"2023-05-16T14:12:35","date_gmt":"2023-09-02T08:31:12","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8java%e5%ae%9e%e7%8e%b0graphql%e6%9c%8d%e5%8a%a1%e5%99%a8\/"},"modified":"2024-04-30T04:27:34","modified_gmt":"2024-04-29T20:27:34","slug":"%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8java%e5%ae%9e%e7%8e%b0graphql%e6%9c%8d%e5%8a%a1%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8java%e5%ae%9e%e7%8e%b0graphql%e6%9c%8d%e5%8a%a1%e5%99%a8\/","title":{"rendered":"\u5c1d\u8bd5\u4f7f\u7528Java\u5b9e\u73b0GraphQL\u670d\u52a1\u5668"},"content":{"rendered":"<p>\u4f60\u597d\u3002\u6211\u4e2a\u4eba\u6709\u673a\u4f1a\u5728Java\u4e2d\u5b9e\u73b0GraphQL\u670d\u52a1\u5668\uff0c\u4eca\u5929\u6211\u60f3\u5199\u4e00\u4e9b\u5173\u4e8e\u8fd9\u65b9\u9762\u7684\u89c1\u89e3\u3002<br \/>\n\u8fd9\u7bc7\u6587\u7ae0\u662fGraphQL Advent Calendar 2020\u7b2c18\u5929\u7684\u6587\u7ae0\u3002<\/p>\n<h2>\u9996\u5148<\/h2>\n<p>\u8fd9\u7bc7\u6587\u7ae0\u6ca1\u6709\u63cf\u8ff0GraphQL\u7684\u6982\u8ff0\u4ee5\u53ca\u5728\u5b9e\u73b0\u4e2d\u6240\u4f7f\u7528\u7684Spring Boot\u53ca\u5176\u5468\u8fb9\u5e93\u3002\u5b83\u9002\u7528\u4e8e\u90a3\u4e9b\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u4e86\u89e3\u8fd9\u4e9b\u5185\u5bb9\u7684\u4eba\uff0c\u4f46\u7531\u4e8e\u6ca1\u6709\u6d89\u53ca\u592a\u8fc7\u56f0\u96be\u7684\u5185\u5bb9\uff0c\u6211\u8ba4\u4e3a\u60a8\u53ef\u80fd\u53ef\u4ee5\u901a\u8fc7\u4e0a\u4e0b\u6587\u6765\u7406\u89e3\u3002<\/p>\n<h2>\u5bfb\u627e\u56fe\u4e66\u9986<\/h2>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u5bfb\u627e\u5b9e\u73b0GraphQL\u670d\u52a1\u5668\u6240\u5fc5\u9700\u7684\u5e93\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">GraphQL Java Kickstart<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">GraphQL Java<\/ul>\n<p>\u627e\u5230\u4e86\u4e24\u4e2a\u9009\u9879\u3002\u770b\u8d77\u6765\u90fd\u53ef\u4ee5\u4e0eSpring Boot\u7ed3\u5408\u4f7f\u7528\u3002<br \/>\n\u67e5\u770bGraphQL Resolver\u7684\u5b9e\u73b0\u793a\u4f8b\u540e\uff0c\u53d1\u73b0GraphQL Java Kickstart\u4f3c\u4e4e\u66f4\u7b80\u6d01\uff0c\u6240\u4ee5\u6211\u51b3\u5b9a\u4f7f\u7528\u5b83\u3002<\/p>\n<p>\u5f53\u770b\u5230GraphQL Java Kickstart\u7684README\u65f6\uff0c<\/p>\n<blockquote><p>\u8fd9\u4e2a\u9879\u76ee\u5c01\u88c5\u4e86\u7531GraphQL Java\u63d0\u4f9b\u7684Java\u5b9e\u73b0\u7684GraphQL\u3002<\/p><\/blockquote>\n<p>\u5199\u7740\u5b83\u5c06GraphQL Java\u8fdb\u884c\u4e86\u5c01\u88c5\u3002\u5662\uff0c\u539f\u6765\u662f\u8fd9\u6837\u3002<\/p>\n<h2>\u786e\u5b9a\u8981\u5b9e\u65bd\u7684\u529f\u80fd<\/h2>\n<p>\u63a5\u4e0b\u6765\u6211\u4eec\u5c06\u51b3\u5b9a\u4f7f\u7528GraphQL\u6765\u5b9e\u73b0\u7684\u529f\u80fd\u3002\u8fd9\u6b21\u6211\u4eec\u51b3\u5b9a\u5b9e\u73b0\u57fa\u672c\u7684Query\u3001Mutation\u548cSubscription\u529f\u80fd\u3002\u529f\u80fd\u7684\u7528\u4f8b\u5927\u81f4\u5982\u4e0b\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Query: \u672c\u306e\u4e00\u89a7\u3092\u53d6\u5f97\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Query: \u672c\u306eID\u3092\u6307\u5b9a\u3057\u3066\u3001\u7279\u5b9a\u306e\u672c\u3092\u53d6\u5f97\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Mutation: \u65b0\u3057\u3044\u672c\u3092\u767b\u9332\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Subscription: \u65b0\u305f\u306b\u767b\u9332\u3055\u308c\u305f\u672c\u3092\u901a\u77e5\u3059\u308b\u3002<\/ul>\n<h2>\u7ec4\u6210\u9879\u76ee<\/h2>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d535537434c4406ccf580\/14-0.png\" alt=\"spring_initializer.png\" \/><\/div>\n<h2>\u521b\u5efa\u5e94\u7528\u7a0b\u5e8f<\/h2>\n<h3>\u6784\u5efa.gradle<\/h3>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u4fee\u6539 build.gradle \u6587\u4ef6\u3002<\/p>\n<p>(Hajime ni, build.gradle wo shu xiugai.)<\/p>\n<p>\u5c06com.graphql-java-kickstart:graphql-spring-boot-starter\u6dfb\u52a0\u4e3a\u4f9d\u8d56\u3002\u540c\u65f6\uff0c\u8fd8\u6dfb\u52a0\u4e86com.graphql-java-kickstart:graphiql-spring-boot-starter\uff0c\u7528\u4e8e\u5728GraphiQL\u4e0a\u6d4b\u8bd5API\u3002<br \/>\n\u6b64\u5916\uff0c\u8fd8\u6dfb\u52a0\u4e86io.projectreactor:reactor-core\u3001spring-actuator\u548cmicrometer-registry-prometheus\u7684\u4f9d\u8d56\u3002\u524d\u8005\u7528\u4e8e\u5b9e\u73b0Subscription\uff0c\u540e\u8005\u7528\u4e8e\u83b7\u53d6\u6307\u6807\u6570\u636e\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">plugins<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">id<\/span> <span class=\"s1\">'org.springframework.boot'<\/span> <span class=\"n\">version<\/span> <span class=\"s1\">'2.4.1'<\/span>\r\n    <span class=\"n\">id<\/span> <span class=\"s1\">'io.spring.dependency-management'<\/span> <span class=\"n\">version<\/span> <span class=\"s1\">'1.0.10.RELEASE'<\/span>\r\n    <span class=\"n\">id<\/span> <span class=\"s1\">'java'<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"n\">sourceCompatibility<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'11'<\/span>\r\n\r\n<span class=\"n\">configurations<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">compileOnly<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"n\">extendsFrom<\/span> <span class=\"n\">annotationProcessor<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"k\">repositories<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">mavenCentral<\/span><span class=\"o\">()<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"k\">dependencies<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">implementation<\/span> <span class=\"s1\">'com.graphql-java-kickstart:graphql-spring-boot-starter:8.0.0'<\/span>\r\n    <span class=\"n\">runtimeOnly<\/span> <span class=\"s1\">'com.graphql-java-kickstart:graphiql-spring-boot-starter:8.0.0'<\/span>\r\n    <span class=\"c1\">\/\/ To embed GraphiQL tool<\/span>\r\n    <span class=\"n\">implementation<\/span> <span class=\"s1\">'com.graphql-java-kickstart:graphiql-spring-boot-starter:8.0.0'<\/span>\r\n    <span class=\"c1\">\/\/ For subscripion<\/span>\r\n    <span class=\"n\">implementation<\/span> <span class=\"s1\">'io.projectreactor:reactor-core:3.4.1'<\/span>\r\n    <span class=\"c1\">\/\/ For metrics<\/span>\r\n    <span class=\"n\">implementation<\/span> <span class=\"s1\">'org.springframework.boot:spring-boot-starter-actuator'<\/span>\r\n    <span class=\"n\">implementation<\/span> <span class=\"s1\">'io.micrometer:micrometer-registry-prometheus:1.6.0'<\/span>\r\n\r\n    <span class=\"n\">compileOnly<\/span> <span class=\"s1\">'org.projectlombok:lombok'<\/span>\r\n    <span class=\"n\">annotationProcessor<\/span> <span class=\"s1\">'org.projectlombok:lombok'<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u5e94\u7528\u7a0b\u5e8f\u914d\u7f6e\u6587\u4ef6 yml<\/h3>\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u8981\u521b\u5efa application.yml \u6587\u4ef6\u3002<\/p>\n<p>1. To enable graphiql\u4ee5\u4e0b\u306e\u8a2d\u5b9a\u3067\u3001GraphiQL\u306eURL\u30a8\u30a4\u30ea\u30a2\u30b9\u3068GraphQL\u306e\u30a2\u30af\u30a8\u30b9\u30dd\u30a4\u30f3\u30c8URL\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>2. To enable graphql metrics\u306f\u3001GraphQL\u306b\u95a2\u3059\u308bMetrics\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306e\u8a2d\u5b9a\u3067\u3059\u3002<\/p>\n<p>3. To enable to get metrics..\u306f\u3001spring-actuator\u306e\u8a2d\u5b9a\u3067\u3059\u3002\/actuator\/prometheus\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u3001\u5404Metrics\u304cPrometheus\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\"># 1. To enable graphiql<\/span>\r\n<span class=\"na\">graphiql<\/span><span class=\"pi\">:<\/span>\r\n  <span class=\"na\">mapping<\/span><span class=\"pi\">:<\/span> <span class=\"s\">\/graphiql<\/span>\r\n  <span class=\"na\">endpoint<\/span><span class=\"pi\">:<\/span>\r\n    <span class=\"na\">graphql<\/span><span class=\"pi\">:<\/span> <span class=\"s\">\/graphql<\/span>\r\n<span class=\"c1\"># 2. To enable graphql metrics<\/span>\r\n<span class=\"na\">graphql<\/span><span class=\"pi\">:<\/span>\r\n  <span class=\"na\">servlet<\/span><span class=\"pi\">:<\/span>\r\n    <span class=\"na\">actuator-metrics<\/span><span class=\"pi\">:<\/span> <span class=\"no\">true<\/span>\r\n<span class=\"c1\"># 3. To enable to get metrics of spring-actuator from \/actuator\/prometheus<\/span>\r\n<span class=\"na\">management<\/span><span class=\"pi\">:<\/span>\r\n  <span class=\"na\">endpoints<\/span><span class=\"pi\">:<\/span>\r\n    <span class=\"na\">web<\/span><span class=\"pi\">:<\/span>\r\n      <span class=\"na\">exposure<\/span><span class=\"pi\">:<\/span>\r\n        <span class=\"na\">include<\/span><span class=\"pi\">:<\/span> <span class=\"s\">health,metrics,prometheus<\/span>\r\n<\/code><\/pre>\n<h3>schema.graphqls\u7684\u542b\u4e49\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u521b\u5efa\u4e00\u4e2aschema.graphqls\u6587\u4ef6\uff0c\u5e76\u5b9a\u4e49GraphQL\u6a21\u5f0f\u3002<br \/>\n\u5c06schema.graphqls\u6587\u4ef6\u6ce8\u518c\u5728src\/main\/resources\/graphsql\u76ee\u5f55\u4e0b\u3002<\/p>\n<pre class=\"post-pre\"><code>type Query {\r\n    bookById(id: ID): Book\r\n    books: [Book]!\r\n}\r\n\r\ntype Book {\r\n    id: ID\r\n    name: String\r\n    pageCount: Int\r\n}\r\n\r\ntype Mutation {\r\n    registerBook (\r\n        id: ID\r\n        name: String\r\n        pageCount: Int\r\n    ): Book\r\n}\r\n\r\ntype Subscription {\r\n    subscribeBooks: Book!\r\n}\r\n<\/code><\/pre>\n<h3>Java\u6a21\u578b<\/h3>\n<p>\u5728GraphQL Java\u4e2d\uff0c\u9700\u8981\u5b9a\u4e49\u4e0e\u6a21\u5f0f\u76f8\u5339\u914d\u7684Java\u7c7b\u3002\u9996\u5148\uff0c\u521b\u5efa\u4e00\u4e2a\u540d\u4e3aBook Type\u7684Java\u6a21\u578b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nd\">@AllArgsConstructor<\/span>\r\n<span class=\"nd\">@Data<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Book<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">id<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">name<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">pageCount<\/span><span class=\"o\">;<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u89e3\u51b3\u8005<\/h3>\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u521b\u5efa\u4e00\u4e2a\u5b9e\u73b0\u4e86Query\u3001Mutation\u548cSubscription\u7684Resolver\u3002\u9700\u8981\u5206\u522b\u521b\u5efa\u4ee5\u4e0b\u5b9e\u73b0\u7c7b\uff0c\u5e76\u4e14\u67e5\u8be2\u540d\u79f0\u4e0e\u5b9e\u73b0\u7684\u65b9\u6cd5\u540d\u79f0\u5fc5\u987b\u76f8\u540c\u3002\u53e6\u5916\uff0c\u5b9e\u73b0\u7c7b\u9700\u8981\u4f5c\u4e3aSpring\u7684Bean\u8fdb\u884c\u6ce8\u518c\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Query : GraphQLQueryResolver\u3092\u5b9f\u88c5\u3057\u305f\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3001\u30b9\u30ad\u30fc\u30de\u306b\u5b9a\u7fa9\u3057\u305f\u30af\u30a8\u30ea\u30fc\u540d\u3068\u5f15\u6570\u3092\u6301\u3064\u30e1\u30bd\u30c3\u30c9\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Mutation : GraphQLMutationResolver\u3092\u5b9f\u88c5\u3057\u305f\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3001\u30b9\u30ad\u30fc\u30de\u306b\u5b9a\u7fa9\u3057\u305fMutation\u540d\u3068\u5f15\u6570\u3092\u6301\u3064\u30e1\u30bd\u30c3\u30c9\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Subscription : GraphQLSubscriptionResolver\u3092\u5b9f\u88c5\u3057\u305f\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3001\u30b9\u30ad\u30fc\u30de\u306b\u5b9a\u7fa9\u3057\u305fSubscription\u540d\u3068\u5f15\u6570\u3092\u6301\u3064\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002Return\u5024\u306freactive-streams\u306ePublisher\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/ul>\n<p>DataProvider\u548cIBookProcessor\u662f\u6211\u5011\u7368\u81ea\u5275\u5efa\u7684\u985e\u5225\u3002\u5b83\u5011\u57f7\u884c\u4ee5\u4e0b\u8655\u7406\u6b65\u9a5f\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">DataProvider : \u30c7\u30fc\u30bf\u63d0\u4f9b\u30af\u30e9\u30b9\u3002\u3059\u3079\u3066\u306eBook\u306eList\u3001\u307e\u305f\u306f\u6307\u5b9a\u3055\u308c\u305fbookId\u306eBook\u3092\u8fd4\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">IBookProcessor : \u672c\u306e\u767b\u9332\u3092\u30a4\u30d9\u30f3\u30c8\u3068\u3057\u3066\u767b\u9332(emit)\u3057\u3001\u30a4\u30d9\u30f3\u30c8\u306ePublisher\u3092\u767a\u884c(publish)\u3059\u308b\u3002<\/ul>\n<pre class=\"post-pre\"><code><span class=\"nd\">@Slf4j<\/span>\r\n<span class=\"nd\">@AllArgsConstructor<\/span>\r\n<span class=\"nd\">@Component<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">BookResolver<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">GraphQLQueryResolver<\/span><span class=\"o\">,<\/span>\r\n                                     <span class=\"nc\">GraphQLMutationResolver<\/span><span class=\"o\">,<\/span>\r\n                                     <span class=\"nc\">GraphQLSubscriptionResolver<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"kd\">final<\/span> <span class=\"nc\">DataProvider<\/span> <span class=\"n\">dataProvider<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"kd\">final<\/span> <span class=\"nc\">IBookProcessor<\/span> <span class=\"n\">bookProcessor<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"cm\">\/**\r\n     * Query: Get all books.\r\n     *\/<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Book<\/span><span class=\"o\">&gt;<\/span> <span class=\"nf\">books<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">dataProvider<\/span><span class=\"o\">.<\/span><span class=\"na\">books<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"cm\">\/**\r\n     * Query: Retrieve a book by id.\r\n     *\/<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">Book<\/span> <span class=\"nf\">bookById<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">bookId<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">dataProvider<\/span><span class=\"o\">.<\/span><span class=\"na\">bookById<\/span><span class=\"o\">(<\/span><span class=\"n\">bookId<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"cm\">\/**\r\n     * Mutation: Register a book.\r\n     *\/<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">Book<\/span> <span class=\"nf\">registerBook<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">id<\/span><span class=\"o\">,<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">name<\/span><span class=\"o\">,<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">pageCount<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"kd\">final<\/span> <span class=\"nc\">Book<\/span> <span class=\"n\">book<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Book<\/span><span class=\"o\">(<\/span><span class=\"n\">id<\/span><span class=\"o\">,<\/span> <span class=\"n\">name<\/span><span class=\"o\">,<\/span> <span class=\"n\">pageCount<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">dataProvider<\/span><span class=\"o\">.<\/span><span class=\"na\">books<\/span><span class=\"o\">().<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">book<\/span><span class=\"o\">);<\/span>\r\n\r\n        <span class=\"c1\">\/\/ Emit an event for subscription.<\/span>\r\n        <span class=\"n\">bookProcessor<\/span><span class=\"o\">.<\/span><span class=\"na\">emit<\/span><span class=\"o\">(<\/span><span class=\"n\">book<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">book<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"cm\">\/**\r\n     * Subscription: Publish an event that a book is registered.\r\n     * Need to return Publisher on reactive-streams.\r\n     *\/<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">Publisher<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Book<\/span><span class=\"o\">&gt;<\/span> <span class=\"nf\">subscribeBooks<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">bookProcessor<\/span><span class=\"o\">.<\/span><span class=\"na\">publish<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"cm\">\/**\r\n     * Error handler. can handle an throwable that occurs in resolver execution.\r\n     *\/<\/span>\r\n    <span class=\"nd\">@ExceptionHandler<\/span><span class=\"o\">(<\/span><span class=\"nc\">Throwable<\/span><span class=\"o\">.<\/span><span class=\"na\">class<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"nc\">GraphQLError<\/span> <span class=\"nf\">handle<\/span><span class=\"o\">(<\/span><span class=\"nc\">Throwable<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"n\">log<\/span><span class=\"o\">.<\/span><span class=\"na\">error<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Failed to execute resolver.\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">e<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">ThrowableGraphQLError<\/span><span class=\"o\">(<\/span><span class=\"n\">e<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"Failed to execute resolver.\"<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d535537434c4406ccf580\/36-0.png\" alt=\"service_image.png\" \/><\/div>\n<h2>\u8fd0\u884c\u5e94\u7528\u7a0b\u5e8f<\/h2>\n<p>\u8fd0\u884c\u521b\u5efa\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u542f\u52a8SpringBoot\u5e94\u7528\u7a0b\u5e8f\uff0c\u7136\u540e\u4f7f\u7528\u6d4f\u89c8\u5668\u8bbf\u95eeGraphiQL\u7684\u7aef\u70b9(http:\/\/localhost:8080\/graphiql)\uff0c\u5e76\u6267\u884c\u67e5\u8be2\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d535537434c4406ccf580\/39-3.png\" alt=\"subscription.png\" \/><\/div>\n<p>\u5ea6\u91cf\u8861\u4e5f\u88ab\u51c6\u786e\u5730\u6536\u96c6\u4e86\u8d77\u6765\u3002\u6211\u4eec\u4f7f\u7528\u4e86Metricat\u8fd9\u4e2a\u5de5\u5177\u6765\u5c06\u5176\u4ee5\u56fe\u8868\u7684\u5f62\u5f0f\u5448\u73b0\uff0c\u8be5\u5de5\u5177\u53ef\u4ee5\u5728\u4ee5\u4e0b\u7f51\u7ad9\u4e0a\u627e\u5230\u3002<\/p>\n<ul class=\"post-ul\">Prometheus\u3068Metricat\u306b\u3088\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u76e3\u8996<\/ul>\n<p>\u5982\u679c\u5c06spring-actuator\u7684prometheus\u7aef\u70b9(http:\/\/localhost:8080\/actuator\/prometheus)\u8bbe\u7f6e\u4e3aMetricat\u7684Prometheus\u5bfc\u51faURL\uff0c\u7136\u540e\u5728GraphiQL\u4e2d\u6267\u884c\u67e5\u8be2\uff0c\u5c06\u663e\u793a\u5982\u4e0b\u56fe\u6240\u793a\u7684\u56fe\u5f62\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d535537434c4406ccf580\/43-0.png\" alt=\"metrics.png\" \/><\/div>\n<h2>\u7efc\u4e0a\u6240\u8ff0<\/h2>\n<p>\u6211\u5df2\u7ecf\u63cf\u8ff0\u4e86\u5982\u4f55\u5728Java\u4e2d\u5b9e\u73b0GraphQL\u670d\u52a1\u5668\u7684\u65b9\u6cd5\u3002\u5c3d\u7ba1\u5b9e\u73b0\u7684\u4ee3\u7801\u53ea\u662f\u793a\u4f8b\u4ee3\u7801\uff0c\u5e76\u4e14\u5f88\u5bb9\u6613\u5f00\u53d1\u89e3\u6790\u5668\u7b49\uff0c\u4f46\u4f7f\u7528\u8d77\u6765\u65b9\u4fbf\uff0c\u5e76\u4e14\u7ed9\u4eba\u7684\u5370\u8c61\u4e5f\u4e0d\u9519\u3002<\/p>\n<p>\u867d\u7136\u76ee\u524d\u8fd8\u6ca1\u6709\u5728\u5b9e\u9645\u5de5\u4f5c\u4e2d\u4f7f\u7528\u7684\u8ba1\u5212\uff0c\u4f46\u6211\u60f3\u8c61\u4e86\u4e00\u4e9b\u5728\u5b9e\u9645\u5de5\u4f5c\u4e2d\u53ef\u80fd\u4f1a\u9047\u5230\u7684\u95ee\u9898\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Resolver\u306easync\u3067\u5b9f\u88c5\u3057\u305f\u3044\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u2192 CompletionStage(\u5b9f\u88c5\u30af\u30e9\u30b9\uff1aCompletableFuture)\u304creturn\u3067\u304d\u308b\u3088\u3046\u3067\u3059\u3002Async Resolvers #1<\/ul>\n<\/li>\n<\/ul>\n<p>\u5206\u6563Tracing\u306e\u5c0e\u5165<br \/>\n\u2192 \u4e00\u5fdc\u3001\u3053\u3053Tracing and Metrics\u306b\u8a18\u8ff0\u304c\u3042\u308a\u307e\u3059\u304c\u3001Apollo style tracing ? \u8b0e\u306a\u306e\u3067\u5f8c\u3067\u8abf\u3079\u308b\u3002<br \/>\nMetric\u306bResolver\u306e\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u8ffd\u52a0\u3057\u305f\u3044\u3002<br \/>\n\u2192 Micrometer\u3092\u4f7f\u3063\u3066\u3001\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u611f\u3058\uff1fResolver\u306e\u4e2d\u306b\u30cf\u30fc\u30c9\u30b3\u30fc\u30c9\u3057\u305f\u304f\u306a\u3044\u306e\u3067\u3001Spring AOP\u306a\u3069\u3067\u5b9f\u88c5\u3057\u305f\u3044\u3002\u5f8c\u3067\u8abf\u3079\u308b\u3002<br \/>\nSpring WebFlux\u5bfe\u5fdc<br \/>\n\u2192 \u306a\u306b\u304b\u3042\u308b\u306e\u3067\u5f8c\u3067\u8abf\u3079\u308b\u3002graphql-kickstart-spring-webflux<\/p>\n<p>\u6211\u5df2\u7ecf\u628a\u4f7f\u7528\u8fc7\u7684\u6e90\u4ee3\u7801\u6ce8\u518c\u5728GitHub\u4e0a\uff0c\u8bf7\u53c2\u8003\u3002\u975e\u5e38\u5e0c\u671b\u80fd\u5bf9\u60a8\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n<ul class=\"post-ul\">GitHub:Simple application of GraphQL server<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u4f60\u597d\u3002\u6211\u4e2a\u4eba\u6709\u673a\u4f1a\u5728Java\u4e2d\u5b9e\u73b0GraphQL\u670d\u52a1\u5668\uff0c\u4eca\u5929\u6211\u60f3\u5199\u4e00\u4e9b\u5173\u4e8e\u8fd9\u65b9\u9762\u7684\u89c1\u89e3\u3002 \u8fd9\u7bc7\u6587\u7ae0\u662fGraph [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-43576","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5c1d\u8bd5\u4f7f\u7528Java\u5b9e\u73b0GraphQL\u670d\u52a1\u5668 - 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\u4f7f\u7528java\u5b9e\u73b0graphql\u670d\u52a1\u5668\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5c1d\u8bd5\u4f7f\u7528Java\u5b9e\u73b0GraphQL\u670d\u52a1\u5668\" \/>\n<meta property=\"og:description\" content=\"\u4f60\u597d\u3002\u6211\u4e2a\u4eba\u6709\u673a\u4f1a\u5728Java\u4e2d\u5b9e\u73b0GraphQL\u670d\u52a1\u5668\uff0c\u4eca\u5929\u6211\u60f3\u5199\u4e00\u4e9b\u5173\u4e8e\u8fd9\u65b9\u9762\u7684\u89c1\u89e3\u3002 \u8fd9\u7bc7\u6587\u7ae0\u662fGraph [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5c1d\u8bd5\u4f7f\u7528java\u5b9e\u73b0graphql\u670d\u52a1\u5668\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-09-02T08:31:12+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-29T20:27:34+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d535537434c4406ccf580\/14-0.png\" \/>\n<meta name=\"author\" content=\"\u79d1, \u96c5\" \/>\n<meta name=\"twitter:card\" 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