GraphQL Java

Try it in 3 steps

1. 1

   Create a minimal Maven project for GraphQL Java 26.1

   Pin 26.1 in an isolated Maven project compiled against the Java 11 consumer baseline.

   mkdir -p graphql-java-demo/src/main/java/demo && printf '%s\n' '<project xmlns="http://maven.apache.org/POM/4.0.0">' '<modelVersion>4.0.0</modelVersion>' '<groupId>demo</groupId><artifactId>graphql-java-demo</artifactId><version>1.0.0</version>' '<properties><maven.compiler.release>11</maven.compiler.release></properties>' '<dependencies><dependency><groupId>com.graphql-java</groupId><artifactId>graphql-java</artifactId><version>26.1</version></dependency></dependencies>' '</project>' > graphql-java-demo/pom.xmlCopy
2. 2

   Build a minimal schema from SDL and a DataFetcher

   Exercise the basic SchemaParser, RuntimeWiring, DataFetcher, and GraphQL execution flow.

   printf '%s\n' 'package demo;' 'import graphql.GraphQL;' 'import graphql.ExecutionResult;' 'import graphql.schema.GraphQLSchema;' 'import graphql.schema.idl.*;' 'public class Main {' ' public static void main(String[] args) {' ' var types = new SchemaParser().parse("type Query { hello: String }");' ' var wiring = RuntimeWiring.newRuntimeWiring().type("Query", t -> t.dataFetcher("hello", e -> "world")).build();' ' GraphQLSchema schema = new SchemaGenerator().makeExecutableSchema(types, wiring);' ' ExecutionResult result = GraphQL.newGraphQL(schema).build().execute("{ hello }");' ' System.out.println(result.toSpecification());' ' }' '}' > graphql-java-demo/src/main/java/demo/Main.javaCopy
3. 3

   Compile and inspect the query result

   Execute { hello } directly through the core library without starting an HTTP server.

   cd graphql-java-demo && mvn -q compile dependency:build-classpath -Dmdep.outputFile=cp.txt && java -cp "target/classes:$(cat cp.txt)" demo.MainCopy

Built with

• Java
• GraphQL

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