Introduce HttpServiceProxyFactory#createClient Kotlin extension

Closes gh-29942

spring-webflux/src/main/kotlin/org/springframework/web/service/invoker/HttpServiceProxyFactoryExtensions.kt

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2002-2023 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.invoker
+
+/**
+ *  Extension for [HttpServiceProxyFactory.createClient] providing a `createClient<Foo>()` variant.
+ *
+ * @author Sebastien Deleuze
+ * @since 6.0.5
+ */
+inline fun <reified T : Any> HttpServiceProxyFactory.createClient(): T =
+	createClient(T::class.java)

spring-webflux/src/test/kotlin/org/springframework/web/reactive/function/client/support/KotlinWebClientHttpServiceProxyTests.kt

@@ -28,6 +28,7 @@ import org.springframework.web.reactive.function.client.ExchangeFunction
 import org.springframework.web.reactive.function.client.WebClient
 import org.springframework.web.service.annotation.GetExchange
 import org.springframework.web.service.invoker.HttpServiceProxyFactory
+import org.springframework.web.service.invoker.createClient
 import reactor.core.publisher.Mono
 import reactor.test.StepVerifier
 import java.time.Duration
@@ -130,7 +131,7 @@ class KotlinWebClientHttpServiceProxyTests {
 		return HttpServiceProxyFactory.builder()
 			.clientAdapter(WebClientAdapter.forClient(webClient))
 			.build()
-			.createClient(TestHttpService::class.java)
+			.createClient()
 	}
 
 	private fun prepareResponse(consumer: Consumer<MockResponse>) {

spring-webflux/src/test/kotlin/org/springframework/web/service/invoker/HttpServiceProxyFactoryExtensionsTests.kt

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2002-2023 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.invoker
+
+import io.mockk.every
+import io.mockk.mockk
+import io.mockk.verify
+import org.junit.jupiter.api.Test
+
+/**
+ * Tests for [HttpServiceProxyFactory] Kotlin extensions.
+ *
+ * @author Sebastien Deleuze
+ */
+class HttpServiceProxyFactoryExtensionsTests {
+
+	private val proxyFactory = mockk<HttpServiceProxyFactory>()
+
+	@Test
+	fun `createClient extension`() {
+		every { proxyFactory.createClient(String::class.java) } returns ""
+		proxyFactory.createClient<String>()
+		verify { proxyFactory.createClient(String::class.java) }
+	}
+
+}