Polish

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/zipkin/ZipkinConnectionDetails.java

@@ -22,7 +22,6 @@ import org.springframework.boot.autoconfigure.service.connection.ConnectionDetai
 
 /**
  * Details required to establish a connection to a Zipkin server.
- *
  * <p>
  * Note: {@linkplain #getSpanEndpoint()} is only read once and passed to a bean of type
  * {@link HttpEndpointSupplier.Factory} which defaults to no-op (constant).

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/zipkin/ZipkinHttpClientSender.java

@@ -55,7 +55,7 @@ class ZipkinHttpClientSender extends HttpSender {
 			.POST(BodyPublishers.ofByteArray(body))
 			.uri(endpoint)
 			.timeout(this.readTimeout);
-		headers.forEach((key, values) -> values.forEach((value) -> request.header(key, value)));
+		headers.forEach((name, values) -> values.forEach((value) -> request.header(name, value)));
 		try {
 			HttpResponse<Void> response = this.httpClient.send(request.build(), BodyHandlers.discarding());
 			if (response.statusCode() / 100 != 2) {

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/zipkin/ZipkinProperties.java

@@ -90,6 +90,7 @@ public class ZipkinProperties {
 		 * JSON.
 		 */
 		JSON,
+
 		/**
 		 * Protocol Buffers v3.
 		 */

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/tracing/zipkin/DefaultEncodingConfiguration.java

@@ -30,7 +30,7 @@ class DefaultEncodingConfiguration {
 
 	@Bean
 	@ConditionalOnMissingBean
-	Encoding encoding() {
+	Encoding zipkinReporterEncoding() {
 		return Encoding.JSON;
 	}
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/tracing/zipkin/TestHttpEndpointSupplier.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2012-2024 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.boot.actuate.autoconfigure.tracing.zipkin;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+import zipkin2.reporter.HttpEndpointSupplier;
+
+/**
+ * Test {@link HttpEndpointSupplier}.
+ *
+ * @author Moritz Halbritter
+ */
+class TestHttpEndpointSupplier implements HttpEndpointSupplier {
+
+	private final String url;
+
+	private final AtomicInteger suffix = new AtomicInteger();
+
+	TestHttpEndpointSupplier(String url) {
+		this.url = url;
+	}
+
+	@Override
+	public String get() {
+		return this.url + "/" + this.suffix.incrementAndGet();
+	}
+
+	@Override
+	public void close() {
+	}
+
+}

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/tracing/zipkin/ZipkinConfigurationsBraveConfigurationTests.java

@@ -72,7 +72,6 @@ class ZipkinConfigurationsBraveConfigurationTests {
 		this.contextRunner.withClassLoader(new FilteredClassLoader("zipkin2.reporter.brave"))
 			.withUserConfiguration(SenderConfiguration.class)
 			.run((context) -> assertThat(context).doesNotHaveBean(AsyncZipkinSpanHandler.class));
-
 	}
 
 	@Test
@@ -128,13 +127,7 @@ class ZipkinConfigurationsBraveConfigurationTests {
 		this.contextRunner.withUserConfiguration(SenderConfiguration.class).run((context) -> {
 			@SuppressWarnings("unchecked")
 			BytesEncoder<MutableSpan> encoder = context.getBean(BytesEncoder.class);
-
-			MutableSpan span = new MutableSpan();
-			span.traceId("1");
-			span.id("1");
-			span.tag("error", "true");
-			span.error(new RuntimeException("ice cream"));
-
+			MutableSpan span = createTestSpan();
 			// default tag key name is "error", and doesn't overwrite
 			assertThat(new String(encoder.encode(span), StandardCharsets.UTF_8)).isEqualTo(
 					"{\"traceId\":\"0000000000000001\",\"id\":\"0000000000000001\",\"tags\":{\"error\":\"true\"}}");
@@ -147,19 +140,22 @@ class ZipkinConfigurationsBraveConfigurationTests {
 			.run((context) -> {
 				@SuppressWarnings("unchecked")
 				BytesEncoder<MutableSpan> encoder = context.getBean(BytesEncoder.class);
-
-				MutableSpan span = new MutableSpan();
-				span.traceId("1");
-				span.id("1");
-				span.tag("error", "true");
-				span.error(new RuntimeException("ice cream"));
-
+				MutableSpan span = createTestSpan();
 				// The custom throwable parser doesn't use the key "error" we can see both
 				assertThat(new String(encoder.encode(span), StandardCharsets.UTF_8)).isEqualTo(
 						"{\"traceId\":\"0000000000000001\",\"id\":\"0000000000000001\",\"tags\":{\"error\":\"true\",\"exception\":\"ice cream\"}}");
 			});
 	}
 
+	private MutableSpan createTestSpan() {
+		MutableSpan span = new MutableSpan();
+		span.traceId("1");
+		span.id("1");
+		span.tag("error", "true");
+		span.error(new RuntimeException("ice cream"));
+		return span;
+	}
+
 	@Configuration(proxyBeanMethods = false)
 	private static final class SenderConfiguration {
 
@@ -185,7 +181,7 @@ class ZipkinConfigurationsBraveConfigurationTests {
 
 		@Bean
 		Tag<Throwable> throwableTag() {
-			return new Tag<Throwable>("exception") {
+			return new Tag<>("exception") {
 				@Override
 				protected String parseValue(Throwable throwable, TraceContext traceContext) {
 					return throwable.getMessage();

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/tracing/zipkin/ZipkinHttpClientSenderTests.java

@@ -24,7 +24,6 @@ import java.util.Base64;
 import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
-import java.util.concurrent.atomic.AtomicInteger;
 import java.util.function.Consumer;
 
 import okhttp3.mockwebserver.MockResponse;
@@ -57,7 +56,7 @@ class ZipkinHttpClientSenderTests extends ZipkinHttpSenderTests {
 
 	private static MockWebServer mockBackEnd;
 
-	private static String zipkinUrl;
+	static String zipkinUrl;
 
 	@BeforeAll
 	static void beforeAll() throws IOException {
@@ -130,22 +129,15 @@ class ZipkinHttpClientSenderTests extends ZipkinHttpSenderTests {
 	void sendUsesDynamicEndpoint() throws Exception {
 		mockBackEnd.enqueue(new MockResponse());
 		mockBackEnd.enqueue(new MockResponse());
-		AtomicInteger suffix = new AtomicInteger();
-		try (BytesMessageSender sender = createSender((e) -> new HttpEndpointSupplier() {
-			@Override
-			public String get() {
-				return zipkinUrl + "/" + suffix.incrementAndGet();
+		try (TestHttpEndpointSupplier httpEndpointSupplier = new TestHttpEndpointSupplier(zipkinUrl)) {
+			try (BytesMessageSender sender = createSender((endpoint) -> httpEndpointSupplier, Encoding.JSON,
+					Duration.ofSeconds(10))) {
+				sender.send(Collections.emptyList());
+				sender.send(Collections.emptyList());
 			}
-
-			@Override
-			public void close() {
-			}
-		}, Encoding.JSON, Duration.ofSeconds(10))) {
-			sender.send(Collections.emptyList());
-			sender.send(Collections.emptyList());
+			assertThat(mockBackEnd.takeRequest().getPath()).endsWith("/1");
+			assertThat(mockBackEnd.takeRequest().getPath()).endsWith("/2");
 		}
-		assertThat(mockBackEnd.takeRequest().getPath()).endsWith("/1");
-		assertThat(mockBackEnd.takeRequest().getPath()).endsWith("/2");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/tracing/zipkin/ZipkinRestTemplateSenderTests.java

@@ -21,7 +21,6 @@ import java.net.URI;
 import java.util.Base64;
 import java.util.Collections;
 import java.util.List;
-import java.util.concurrent.atomic.AtomicInteger;
 
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Test;
@@ -97,7 +96,6 @@ class ZipkinRestTemplateSenderTests extends ZipkinHttpSenderTests {
 			.andExpect(content().contentType("application/x-protobuf"))
 			.andExpect(content().string("span1span2"))
 			.andRespond(withStatus(HttpStatus.ACCEPTED));
-
 		try (BytesMessageSender sender = createSender(Encoding.PROTO3)) {
 			sender.send(List.of(toByteArray("span1"), toByteArray("span2")));
 		}
@@ -111,20 +109,11 @@ class ZipkinRestTemplateSenderTests extends ZipkinHttpSenderTests {
 	void sendUsesDynamicEndpoint() throws Exception {
 		this.mockServer.expect(requestTo(ZIPKIN_URL + "/1")).andRespond(withStatus(HttpStatus.ACCEPTED));
 		this.mockServer.expect(requestTo(ZIPKIN_URL + "/2")).andRespond(withStatus(HttpStatus.ACCEPTED));
-
-		AtomicInteger suffix = new AtomicInteger();
-		try (BytesMessageSender sender = createSender((e) -> new HttpEndpointSupplier() {
-			@Override
-			public String get() {
-				return ZIPKIN_URL + "/" + suffix.incrementAndGet();
-			}
-
-			@Override
-			public void close() {
+		try (HttpEndpointSupplier httpEndpointSupplier = new TestHttpEndpointSupplier(ZIPKIN_URL)) {
+			try (BytesMessageSender sender = createSender((endpoint) -> httpEndpointSupplier, Encoding.JSON)) {
+				sender.send(Collections.emptyList());
+				sender.send(Collections.emptyList());
 			}
-		}, Encoding.JSON)) {
-			sender.send(Collections.emptyList());
-			sender.send(Collections.emptyList());
 		}
 	}
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/tracing/zipkin/ZipkinWebClientSenderTests.java

@@ -24,7 +24,6 @@ import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
-import java.util.concurrent.atomic.AtomicInteger;
 import java.util.function.Consumer;
 
 import okhttp3.mockwebserver.MockResponse;
@@ -113,11 +112,9 @@ class ZipkinWebClientSenderTests extends ZipkinHttpSenderTests {
 	void sendShouldSendSpansToZipkinInProto3() throws IOException, InterruptedException {
 		mockBackEnd.enqueue(new MockResponse());
 		List<byte[]> encodedSpans = List.of(toByteArray("span1"), toByteArray("span2"));
-
 		try (BytesMessageSender sender = createSender(Encoding.PROTO3, Duration.ofSeconds(10))) {
 			sender.send(encodedSpans);
 		}
-
 		requestAssertions((request) -> {
 			assertThat(request.getMethod()).isEqualTo("POST");
 			assertThat(request.getHeader("Content-Type")).isEqualTo("application/x-protobuf");
@@ -133,24 +130,15 @@ class ZipkinWebClientSenderTests extends ZipkinHttpSenderTests {
 	void sendUsesDynamicEndpoint() throws Exception {
 		mockBackEnd.enqueue(new MockResponse());
 		mockBackEnd.enqueue(new MockResponse());
-
-		AtomicInteger suffix = new AtomicInteger();
-		try (BytesMessageSender sender = createSender((e) -> new HttpEndpointSupplier() {
-			@Override
-			public String get() {
-				return ZIPKIN_URL + "/" + suffix.incrementAndGet();
+		try (HttpEndpointSupplier httpEndpointSupplier = new TestHttpEndpointSupplier(ZIPKIN_URL)) {
+			try (BytesMessageSender sender = createSender((endpoint) -> httpEndpointSupplier, Encoding.JSON,
+					Duration.ofSeconds(10))) {
+				sender.send(Collections.emptyList());
+				sender.send(Collections.emptyList());
 			}
-
-			@Override
-			public void close() {
-			}
-		}, Encoding.JSON, Duration.ofSeconds(10))) {
-			sender.send(Collections.emptyList());
-			sender.send(Collections.emptyList());
+			assertThat(mockBackEnd.takeRequest().getPath()).endsWith("/1");
+			assertThat(mockBackEnd.takeRequest().getPath()).endsWith("/2");
 		}
-
-		assertThat(mockBackEnd.takeRequest().getPath()).endsWith("/1");
-		assertThat(mockBackEnd.takeRequest().getPath()).endsWith("/2");
 	}
 
 	@Test