Auto registration of Querydsl DataFetcher's

See gh-93

graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/data/GraphQlWebFluxQuerydslAutoConfiguration.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright 2002-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.graphql.boot.data;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import graphql.GraphQL;
+import graphql.schema.GraphQLTypeVisitor;
+
+import org.springframework.beans.factory.ObjectProvider;
+import org.springframework.boot.autoconfigure.AutoConfigureAfter;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.querydsl.QuerydslPredicateExecutor;
+import org.springframework.data.querydsl.ReactiveQuerydslPredicateExecutor;
+import org.springframework.graphql.boot.GraphQlAutoConfiguration;
+import org.springframework.graphql.boot.GraphQlSourceBuilderCustomizer;
+import org.springframework.graphql.data.QuerydslDataFetcher;
+import org.springframework.graphql.execution.GraphQlSource;
+
+/**
+ * {@link EnableAutoConfiguration Auto-configuration} that creates a
+ * {@link GraphQlSourceBuilderCustomizer}s to detect Spring Data repositories
+ * with Querydsl support and register them as {@code DataFetcher}s.
+ *
+ * @author Rossen Stoyanchev
+ * @since 1.0.0
+ */
+@Configuration(proxyBeanMethods = false)
+@ConditionalOnWebApplication(type = ConditionalOnWebApplication.Type.REACTIVE)
+@ConditionalOnClass({GraphQL.class, QuerydslPredicateExecutor.class })
+@ConditionalOnBean(GraphQlSource.Builder.class)
+@AutoConfigureAfter(GraphQlAutoConfiguration.class)
+public class GraphQlWebFluxQuerydslAutoConfiguration {
+
+	@Bean
+	public GraphQlSourceBuilderCustomizer reactiveQuerydslRegistrar(
+			ObjectProvider<ReactiveQuerydslPredicateExecutor<?>> executorsProvider) {
+
+		return builder -> {
+			List<ReactiveQuerydslPredicateExecutor<?>> executors =
+					executorsProvider.stream().collect(Collectors.toList());
+
+			if (!executors.isEmpty()) {
+				GraphQLTypeVisitor visitor = QuerydslDataFetcher.registrationTypeVisitor(Collections.emptyList(), executors);
+				builder.typeVisitors(Collections.singletonList(visitor));
+			}
+		};
+	}
+
+}

graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/data/GraphQlWebMvcQuerydslAutoConfiguration.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2002-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.graphql.boot.data;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import graphql.GraphQL;
+import graphql.schema.GraphQLTypeVisitor;
+
+import org.springframework.beans.factory.ObjectProvider;
+import org.springframework.boot.autoconfigure.AutoConfigureAfter;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.querydsl.QuerydslPredicateExecutor;
+import org.springframework.data.querydsl.ReactiveQuerydslPredicateExecutor;
+import org.springframework.graphql.boot.GraphQlAutoConfiguration;
+import org.springframework.graphql.boot.GraphQlSourceBuilderCustomizer;
+import org.springframework.graphql.data.QuerydslDataFetcher;
+import org.springframework.graphql.execution.GraphQlSource;
+
+/**
+ * {@link EnableAutoConfiguration Auto-configuration} that creates a
+ * {@link GraphQlSourceBuilderCustomizer}s to detect Spring Data repositories
+ * with Querydsl support and register them as {@code DataFetcher}s.
+ *
+ * @author Rossen Stoyanchev
+ * @since 1.0.0
+ */
+@Configuration(proxyBeanMethods = false)
+@ConditionalOnWebApplication(type = ConditionalOnWebApplication.Type.SERVLET)
+@ConditionalOnClass({GraphQL.class, QuerydslPredicateExecutor.class })
+@ConditionalOnBean(GraphQlSource.Builder.class)
+@AutoConfigureAfter(GraphQlAutoConfiguration.class)
+public class GraphQlWebMvcQuerydslAutoConfiguration {
+
+	@Bean
+	public GraphQlSourceBuilderCustomizer querydslRegistrar(
+			ObjectProvider<QuerydslPredicateExecutor<?>> executorsProvider,
+			ObjectProvider<ReactiveQuerydslPredicateExecutor<?>> reactiveExecutorsProvider) {
+
+		return builder -> {
+			List<QuerydslPredicateExecutor<?>> executors =
+					executorsProvider.stream().collect(Collectors.toList());
+
+			List<ReactiveQuerydslPredicateExecutor<?>> reactiveExecutors =
+					reactiveExecutorsProvider.stream().collect(Collectors.toList());
+
+			if (!executors.isEmpty()) {
+				GraphQLTypeVisitor visitor = QuerydslDataFetcher.registrationTypeVisitor(executors, reactiveExecutors);
+				builder.typeVisitors(Collections.singletonList(visitor));
+			}
+		};
+	}
+
+}

graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/data/package-info.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Auto-configuration classes for data integrations.
+ */
+@NonNullApi
+@NonNullFields
+package org.springframework.graphql.boot.data;
+
+import org.springframework.lang.NonNullApi;
+import org.springframework.lang.NonNullFields;

graphql-spring-boot-starter/src/main/resources/META-INF/spring.factories

@@ -5,7 +5,9 @@ org.springframework.graphql.boot.GraphQlWebFluxAutoConfiguration,\
 org.springframework.graphql.boot.GraphQlWebMvcAutoConfiguration,\
 org.springframework.graphql.boot.actuate.metrics.GraphQlMetricsAutoConfiguration,\
 org.springframework.graphql.boot.security.GraphQlWebFluxSecurityAutoConfiguration,\
-org.springframework.graphql.boot.security.GraphQlWebMvcSecurityAutoConfiguration
+org.springframework.graphql.boot.security.GraphQlWebMvcSecurityAutoConfiguration,\
+org.springframework.graphql.boot.data.GraphQlWebMvcQuerydslAutoConfiguration,\
+org.springframework.graphql.boot.data.GraphQlWebFluxQuerydslAutoConfiguration
 
 # Spring Test @AutoConfigureGraphQlTester
 org.springframework.graphql.boot.test.tester.AutoConfigureGraphQlTester=\