Add HttpServiceClient and registrar

See gh-35244

spring-web/src/test/java/org/springframework/web/service/registry/HttpServiceClientRegistrarSupportTests.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright 2002-present 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.web.service.registry;
+
+
+import java.util.List;
+import java.util.Map;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.core.env.StandardEnvironment;
+import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
+import org.springframework.core.type.AnnotationMetadata;
+import org.springframework.web.service.registry.client.DefaultClient;
+import org.springframework.web.service.registry.client.EchoClientA;
+import org.springframework.web.service.registry.client.EchoClientB;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+
+/**
+ * Unit tests for {@link HttpServiceClientRegistrarSupport}.
+ * @author Rossen Stoyanchev
+ */
+public class HttpServiceClientRegistrarSupportTests {
+
+	private final TestGroupRegistry groupRegistry = new TestGroupRegistry();
+
+
+	@Test
+	void register() {
+		HttpServiceClientRegistrarSupport registrar = new HttpServiceClientRegistrarSupport() {
+
+			@Override
+			protected void registerHttpServices(GroupRegistry registry, AnnotationMetadata importingClassMetadata) {
+				findAndRegisterHttpServiceClients(groupRegistry, List.of(getClass().getPackage().getName() + ".client"));
+			}
+		};
+		registrar.setEnvironment(new StandardEnvironment());
+		registrar.setResourceLoader(new PathMatchingResourcePatternResolver());
+
+		registrar.registerHttpServices(groupRegistry, mock(AnnotationMetadata.class));
+
+		assertGroups(
+				TestGroup.ofListing("echo", EchoClientA.class, EchoClientB.class),
+				TestGroup.ofListing("default", DefaultClient.class));
+	}
+
+	private void assertGroups(TestGroup... expectedGroups) {
+		Map<String, TestGroup> groupMap = this.groupRegistry.groupMap();
+		assertThat(groupMap.size()).isEqualTo(expectedGroups.length);
+		for (TestGroup expected : expectedGroups) {
+			TestGroup actual = groupMap.get(expected.name());
+			assertThat(actual.httpServiceTypes()).isEqualTo(expected.httpServiceTypes());
+			assertThat(actual.clientType()).isEqualTo(expected.clientType());
+			assertThat(actual.packageNames()).isEqualTo(expected.packageNames());
+			assertThat(actual.packageClasses()).isEqualTo(expected.packageClasses());
+		}
+	}
+
+}

spring-web/src/test/java/org/springframework/web/service/registry/client/DefaultClient.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2002-present 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.web.service.registry.client;
+
+
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.service.annotation.GetExchange;
+import org.springframework.web.service.registry.HttpServiceClient;
+
+@HttpServiceClient
+public interface DefaultClient {
+
+	@GetExchange
+	String handle(@RequestParam String input);
+
+}

spring-web/src/test/java/org/springframework/web/service/registry/client/EchoClientA.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2002-present 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.web.service.registry.client;
+
+
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.service.annotation.GetExchange;
+import org.springframework.web.service.registry.HttpServiceClient;
+
+@HttpServiceClient("echo")
+public interface EchoClientA {
+
+	@GetExchange
+	String handle(@RequestParam String input);
+
+}

spring-web/src/test/java/org/springframework/web/service/registry/client/EchoClientB.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2002-present 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.web.service.registry.client;
+
+
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.service.annotation.GetExchange;
+import org.springframework.web.service.registry.HttpServiceClient;
+
+@HttpServiceClient("echo")
+public interface EchoClientB {
+
+	@GetExchange
+	String handle(@RequestParam String input);
+
+}