springboot集成graphql(二)

Love The Way You Lie 2023-05-29 11:41 21阅读 0赞

**读取多个schema文件，基于[springboot集成graphql(一)][springboot_graphql]继续**

**参考文章：[https://www.graphql-java.com/documentation/v13/schema/][https_www.graphql-java.com_documentation_v13_schema]**

**一、注释CompanyGraphQLProvider.java所有内容**

**二、在资源文件夹src/main/resources目录下添加schema.graphqls文件**

schema {
        query: Query
    }
    
    type Query {
        bookById(id: ID): Book
        companyById(id: ID): Company
    }
    
    type Book {
        id: ID
        name: String
        pageCount: Int
        author: Author
        publisher: String
    }
    
    type Author {
        id: ID
        firstName: String
        lastName: String
        age: Int
    }

**三、修改company.graphqls，修改后的内容为**

type Company {
        id: ID
        name: String
        age: Int
        address: String
        salary: Float
        joinDate: String
    }

**四、创建BookGraphQLDataFetchers(此处内容参考官网)**

package com.zsx.graphql;
    
    import com.google.common.collect.ImmutableMap;
    import graphql.schema.DataFetcher;
    import org.springframework.stereotype.Component;
    
    import java.util.Arrays;
    import java.util.List;
    import java.util.Map;
    
    @Component
    public class BookGraphQLDataFetchers {
    
        private static List<Map<String, String>> books = Arrays.asList(
                ImmutableMap.of("id", "book-1",
                        "name", "Harry Potter and the Philosopher's Stone",
                        "pageCount", "223",
                        "authorId", "author-1",
                        "publisher", "人民教育出版社"),
                ImmutableMap.of("id", "book-2",
                        "name", "Moby Dick",
                        "pageCount", "635",
                        "authorId", "author-2",
                        "publisher", "中国农业出版社"),
                ImmutableMap.of("id", "book-3",
                        "name", "Interview with the vampire",
                        "pageCount", "371",
                        "authorId", "author-3",
                        "publisher", "机械工业出版社")
        );
    
        private static List<Map<String, String>> authors = Arrays.asList(
                ImmutableMap.of("id", "author-1",
                        "firstName", "Joanne",
                        "lastName", "Rowling",
                        "age", "18"),
                ImmutableMap.of("id", "author-2",
                        "firstName", "Herman",
                        "lastName", "Melville",
                        "age", "19"),
                ImmutableMap.of("id", "author-3",
                        "firstName", "Anne",
                        "lastName", "Rice",
                        "age", "20")
        );
    
        public DataFetcher getBookByIdDataFetcher() {
            return dataFetchingEnvironment -> {
                String bookId = dataFetchingEnvironment.getArgument("id");
                return books
                        .stream()
                        .filter(book -> book.get("id").equals(bookId))
                        .findFirst()
                        .orElse(null);
            };
        }
    
        public DataFetcher getAuthorDataFetcher() {
            return dataFetchingEnvironment -> {
                Map<String,String> book = dataFetchingEnvironment.getSource();
                String authorId = book.get("authorId");
                return authors
                        .stream()
                        .filter(author -> author.get("id").equals(authorId))
                        .findFirst()
                        .orElse(null);
            };
        }
    
        public DataFetcher getPageCountDataFetcher() {
            return dataFetchingEnvironment -> {
                Map<String,String> book = dataFetchingEnvironment.getSource();
                return book.get("totalPages");
            };
        }
    }

**五、创建GraphQLProvider**

package com.zsx.graphql;
    
    import com.google.common.base.Charsets;
    import com.google.common.io.Resources;
    import graphql.GraphQL;
    import graphql.schema.GraphQLSchema;
    import graphql.schema.idl.RuntimeWiring;
    import graphql.schema.idl.SchemaGenerator;
    import graphql.schema.idl.SchemaParser;
    import graphql.schema.idl.TypeDefinitionRegistry;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.context.annotation.Bean;
    import org.springframework.stereotype.Component;
    
    import javax.annotation.PostConstruct;
    import java.io.IOException;
    import java.net.URL;
    
    import static graphql.schema.idl.TypeRuntimeWiring.newTypeWiring;
    
    @Component
    public class GraphQLProvider {
    
        private GraphQL graphQL;
    
        @Autowired
        private BookGraphQLDataFetchers bookGraphQLDataFetchers;
        @Autowired
        private CompanyGraphQLDataFetchers companyGraphQLDataFetchers;
    
        @Bean
        public GraphQL graphQL() {
            return graphQL;
        }
    
        @PostConstruct
        public void init() throws IOException {
            URL urlSchema = Resources.getResource("schema.graphqls");
            URL urlCompany = Resources.getResource("company.graphqls");
            String sdlSchema = Resources.toString(urlSchema, Charsets.UTF_8);
            String sdlCompany = Resources.toString(urlCompany, Charsets.UTF_8);
            this.graphQL = GraphQL.newGraphQL(buildSchema(sdlSchema, sdlCompany)).build();
        }
    
        private GraphQLSchema buildSchema(String ... schemaInputs) {
            // TODO: we will create the schema here later
            TypeDefinitionRegistry typeRegistry = new TypeDefinitionRegistry();
            // each registry is merged into the main registry
            SchemaParser schemaParser = new SchemaParser();
            for (String schemaInput : schemaInputs) {
                typeRegistry.merge(schemaParser.parse(schemaInput));
            }
            RuntimeWiring runtimeWiring = buildWiring();
            SchemaGenerator schemaGenerator = new SchemaGenerator();
            return schemaGenerator.makeExecutableSchema(typeRegistry, runtimeWiring);
        }
    
    
        private RuntimeWiring buildWiring() {
            return RuntimeWiring.newRuntimeWiring()
                    .type(newTypeWiring("Query")
                            .dataFetcher("bookById", bookGraphQLDataFetchers.getBookByIdDataFetcher()))
                    .type(newTypeWiring("Book")
                            .dataFetcher("author", bookGraphQLDataFetchers.getAuthorDataFetcher())
                            // This line is new: we need to register the additional DataFetcher
                            .dataFetcher("pageCount", bookGraphQLDataFetchers.getPageCountDataFetcher()))
                    .type(newTypeWiring("Query")
                            .dataFetcher("companyById", companyGraphQLDataFetchers.getCompanyByIdDataFetcher()))
                    .build();
        }
    
    }

**六、执行主程序**

E:\jdk\jdk-13.0.1\bin\java.exe -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-javaagent:E:\JetBrains\IntelliJ IDEA 2019.2.3\lib\idea_rt.jar=60392:E:\JetBrains\IntelliJ IDEA 2019.2.3\bin" -Dfile.encoding=UTF-8 -classpath 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r305-3.0.2.jar;E:\maven\repository\org\checkerframework\checker-qual\2.8.1\checker-qual-2.8.1.jar;E:\maven\repository\com\google\errorprone\error_prone_annotations\2.3.2\error_prone_annotations-2.3.2.jar;E:\maven\repository\com\google\j2objc\j2objc-annotations\1.3\j2objc-annotations-1.3.jar;E:\maven\repository\org\codehaus\mojo\animal-sniffer-annotations\1.18\animal-sniffer-annotations-1.18.jar;E:\maven\repository\org\springframework\boot\spring-boot-devtools\2.2.0.RELEASE\spring-boot-devtools-2.2.0.RELEASE.jar;E:\maven\repository\org\springframework\boot\spring-boot\2.2.0.RELEASE\spring-boot-2.2.0.RELEASE.jar com.zsx.PostgresApplication
    Java HotSpot(TM) 64-Bit Server VM warning: Options -Xverify:none and -noverify were deprecated in JDK 13 and will likely be removed in a future release.
    
      .   ____          _            __ _ _
     /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
    ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
     \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
      '  |____| .__|_| |_|_| |_\__, | / / / /
     =========|_|==============|___/=/_/_/_/
     :: Spring Boot ::        (v2.2.0.RELEASE)
    
    2019-11-05 20:20:57.667  INFO 35232 --- [  restartedMain] com.zsx.PostgresApplication              : Starting PostgresApplication on DESKTOP-I29QKRP with PID 35232 (F:\IdeaProjects\postgres\target\classes started by 18273 in F:\IdeaProjects\postgres)
    2019-11-05 20:20:57.669  INFO 35232 --- [  restartedMain] com.zsx.PostgresApplication              : No active profile set, falling back to default profiles: default
    2019-11-05 20:20:57.703  INFO 35232 --- [  restartedMain] o.s.b.devtools.restart.ChangeableUrls    : The Class-Path manifest attribute in E:\maven\repository\org\glassfish\jaxb\jaxb-core\2.3.0.1\jaxb-core-2.3.0.1.jar referenced one or more files that do not exist: file:/E:/maven/repository/org/glassfish/jaxb/jaxb-core/2.3.0.1/jaxb-api-2.3.0.jar,file:/E:/maven/repository/org/glassfish/jaxb/jaxb-core/2.3.0.1/txw2-2.3.0.1.jar,file:/E:/maven/repository/org/glassfish/jaxb/jaxb-core/2.3.0.1/istack-commons-runtime-3.0.5.jar
    2019-11-05 20:20:57.703  INFO 35232 --- [  restartedMain] o.s.b.devtools.restart.ChangeableUrls    : The Class-Path manifest attribute in E:\maven\repository\com\sun\xml\bind\jaxb-impl\2.3.2\jaxb-impl-2.3.2.jar referenced one or more files that do not exist: file:/E:/maven/repository/com/sun/xml/bind/jaxb-impl/2.3.2/jaxb-runtime-2.3.2.jar,file:/E:/maven/repository/com/sun/xml/bind/jaxb-impl/2.3.2/txw2-2.3.2.jar,file:/E:/maven/repository/com/sun/xml/bind/jaxb-impl/2.3.2/istack-commons-runtime-3.0.8.jar,file:/E:/maven/repository/com/sun/xml/bind/jaxb-impl/2.3.2/stax-ex-1.8.1.jar,file:/E:/maven/repository/com/sun/xml/bind/jaxb-impl/2.3.2/FastInfoset-1.2.16.jar,file:/E:/maven/repository/com/sun/xml/bind/jaxb-impl/2.3.2/jakarta.activation-api-1.2.1.jar
    2019-11-05 20:20:57.703  INFO 35232 --- [  restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
    2019-11-05 20:20:57.703  INFO 35232 --- [  restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
    2019-11-05 20:20:58.395  INFO 35232 --- [  restartedMain] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
    2019-11-05 20:20:58.596  INFO 35232 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8088 (http)
    2019-11-05 20:20:58.601  INFO 35232 --- [  restartedMain] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
    2019-11-05 20:20:58.601  INFO 35232 --- [  restartedMain] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.27]
    2019-11-05 20:20:58.651  INFO 35232 --- [  restartedMain] o.a.c.c.C.[.[localhost].[/api/v1]        : Initializing Spring embedded WebApplicationContext
    2019-11-05 20:20:58.651  INFO 35232 --- [  restartedMain] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 948 ms
    WARNING: An illegal reflective access operation has occurred
    WARNING: Illegal reflective access by org.jooq.tools.reflect.Reflect (file:/E:/maven/repository/org/jooq/jooq/3.12.2/jooq-3.12.2.jar) to constructor java.lang.invoke.MethodHandles$Lookup(java.lang.Class)
    WARNING: Please consider reporting this to the maintainers of org.jooq.tools.reflect.Reflect
    WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
    WARNING: All illegal access operations will be denied in a future release
    2019-11-05 20:20:59.027  WARN 35232 --- [  restartedMain] com.zaxxer.hikari.HikariConfig           : HikariPool-1 - idleTimeout has been set but has no effect because the pool is operating as a fixed size pool.
    2019-11-05 20:20:59.028  INFO 35232 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
    2019-11-05 20:20:59.076  INFO 35232 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
    2019-11-05 20:20:59.711  INFO 35232 --- [  restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
    2019-11-05 20:20:59.903  INFO 35232 --- [  restartedMain] o.f.c.internal.license.VersionPrinter    : Flyway Community Edition 6.0.7 by Redgate
    2019-11-05 20:20:59.907  INFO 35232 --- [  restartedMain] o.f.c.internal.database.DatabaseFactory  : Database: jdbc:postgresql://127.0.0.1:5432/mydb10 (PostgreSQL 12.0)
    2019-11-05 20:20:59.920  INFO 35232 --- [  restartedMain] o.f.core.internal.command.DbValidate     : Successfully validated 2 migrations (execution time 00:00.007s)
    2019-11-05 20:20:59.923  INFO 35232 --- [  restartedMain] o.f.core.internal.command.DbMigrate      : Current version of schema "myschema": 3
    2019-11-05 20:20:59.923  INFO 35232 --- [  restartedMain] o.f.core.internal.command.DbMigrate      : Schema "myschema" is up to date. No migration necessary.
    2019-11-05 20:20:59.984  INFO 35232 --- [  restartedMain] o.s.b.d.a.OptionalLiveReloadServer       : LiveReload server is running on port 35729
    2019-11-05 20:20:59.987  INFO 35232 --- [  restartedMain] o.s.b.a.e.web.EndpointLinksResolver      : Exposing 2 endpoint(s) beneath base path '/actuator'
    2019-11-05 20:21:00.151  INFO 35232 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8088 (http) with context path '/api/v1'
    2019-11-05 20:21:00.152  INFO 35232 --- [  restartedMain] com.zsx.PostgresApplication              : Started PostgresApplication in 2.693 seconds (JVM running for 3.193)
    2019-11-05 20:21:00.330  INFO 35232 --- [1)-192.168.56.1] o.a.c.c.C.[.[localhost].[/api/v1]        : Initializing Spring DispatcherServlet 'dispatcherServlet'
    2019-11-05 20:21:00.330  INFO 35232 --- [1)-192.168.56.1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
    2019-11-05 20:21:00.337  INFO 35232 --- [1)-192.168.56.1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 7 ms

**七、查看请求[http://localhost:8088/api/v1/graphiql][http_localhost_8088_api_v1_graphiql]**

![20191105202229465.png][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzeDE4MjczMTE3MDAz_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzeDE4MjczMTE3MDAz_size_16_color_FFFFFF_t_70 1][]

**到此读取多个schema文件成功 **

[springboot_graphql]: https://blog.csdn.net/zsx18273117003/article/details/102888964
[https_www.graphql-java.com_documentation_v13_schema]: https://www.graphql-java.com/documentation/v13/schema/
[http_localhost_8088_api_v1_graphiql]: http://localhost:8088/api/v1/graphiql
[20191105202229465.png]: https://img-blog.csdnimg.cn/20191105202229465.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzeDE4MjczMTE3MDAz_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191105202318329.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzeDE4MjczMTE3MDAz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzeDE4MjczMTE3MDAz_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20191105202359213.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzeDE4MjczMTE3MDAz,size_16,color_FFFFFF,t_70