Scan schema locations for well-known file extensions

This commit improves gh-56 to scan schema locations for more well-known
file extensions, as previously only `*.graphqls` was supported.
We're now scanning for `*.graphqls`, `*.gqls`, `*.graphql`, `*.gql`.

Closes gh-56

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

@@ -60,7 +60,7 @@ public class GraphQlAutoConfiguration {
 	@ConditionalOnMissingBean(GraphQlSource.Builder.class)
 	public static class GraphQlSourceConfiguration {
 
-		private static final String SCHEMA_FILES_PATTERN = "*.graphqls";
+		private static final String[] SCHEMA_FILES_EXTENSIONS = new String[] {"*.graphqls", "*.graphql", "*.gql", "*.gqls"};
 
 		@Bean
 		@ConditionalOnMissingBean
@@ -85,7 +85,9 @@ public class GraphQlAutoConfiguration {
 		private List<Resource> resolveSchemaResources(ResourcePatternResolver resolver, List<String> schemaLocations) throws IOException {
 			List<Resource> schemaResources = new ArrayList<>();
 			for (String location : schemaLocations) {
-				schemaResources.addAll(Arrays.asList(resolver.getResources(location + SCHEMA_FILES_PATTERN)));
+				for (String extension : SCHEMA_FILES_EXTENSIONS) {
+					schemaResources.addAll(Arrays.asList(resolver.getResources(location + extension)));
+				}
 			}
 			return schemaResources;
 		}

graphql-spring-boot-starter/src/test/java/org/springframework/graphql/boot/GraphQlAutoConfigurationTests.java

@@ -16,6 +16,7 @@
 
 package org.springframework.graphql.boot;
 
+import graphql.schema.GraphQLSchema;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.boot.autoconfigure.AutoConfigurations;
@@ -58,6 +59,19 @@ class GraphQlAutoConfigurationTests {
 				});
 	}
 
+	@Test
+	void shouldScanLocationsForSchemaFiles() {
+		this.contextRunner.withPropertyValues("spring.graphql.schema.locations:classpath:schema/")
+				.run((context) -> {
+					assertThat(context).hasSingleBean(GraphQlSource.class);
+					GraphQlSource graphQlSource = context.getBean(GraphQlSource.class);
+					GraphQLSchema schema = graphQlSource.schema();
+					assertThat(schema.getObjectType("Movie")).isNotNull();
+					assertThat(schema.getObjectType("Book")).isNotNull();
+					assertThat(schema.getObjectType("Store")).isNotNull();
+				});
+	}
+
 	@Configuration(proxyBeanMethods = false)
 	static class CustomGraphQlBuilderConfiguration {
 

graphql-spring-boot-starter/src/test/resources/schema/books.graphqls

@@ -0,0 +1,11 @@
+type Book {
+    id: ID
+    name: String
+    pageCount: Int
+    author: Author
+}
+
+type Author {
+    id: ID
+    name: String
+}

graphql-spring-boot-starter/src/test/resources/schema/movies.gqls

@@ -0,0 +1,10 @@
+type Movie {
+    id: ID
+    title: String
+    director: Director
+}
+
+type Director {
+    id: ID
+    name: String
+}

graphql-spring-boot-starter/src/test/resources/schema/queries.gql

@@ -0,0 +1,5 @@
+type Query {
+    bookById(id: ID): Book
+    movieById(id: ID): Movie
+    storeById(id: ID): Store
+}

graphql-spring-boot-starter/src/test/resources/schema/stores.graphql

@@ -0,0 +1,10 @@
+type Store {
+    id: ID
+    location: Location
+}
+
+type Location {
+    address: String
+    city: String
+    country: String
+}

spring-graphql-docs/src/docs/asciidoc/index.adoc

@@ -129,7 +129,8 @@ The Spring GraphQL project offers a few configuration properties to customize yo
 ----
 # web path to the graphql endpoint
 spring.graphql.path=/graphql
-# locations of the graphql '*.graphqls' schema files
+# locations of the graphql schema files
+# scanning for files with well-known extensions: '*.graphqls', '*.gqls', '*.graphql', '*.gql'
 spring.graphql.schema.locations=classpath:graphql/
 # schema printer endpoint configuration
 # endpoint path is concatenated with the main path, so "/graphql/schema" by default