fix checkstyle spring-projects#2

Author: StefanBratanov

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

@@ -106,19 +106,19 @@ abstract static class HttpPostCall extends Call.Base<Void> {
 
 		private final byte[] body;
 
-		public HttpPostCall(byte[] body) {
+		HttpPostCall(byte[] body) {
 			this.body = body;
 		}
 
-		public byte[] getBody() {
+		protected byte[] getBody() {
 			return getBody(true);
 		}
 
-		public byte[] getBody(boolean compressIfNeeded) {
-			return compressIfNeeded && needsCompression() ? compress(this.body) : this.body;
+		protected byte[] getBody(boolean compressIfNeeded) {
+			return (compressIfNeeded && needsCompression()) ? compress(this.body) : this.body;
 		}
 
-		public HttpHeaders getDefaultHeaders() {
+		protected HttpHeaders getDefaultHeaders() {
 			HttpHeaders headers = new HttpHeaders();
 			headers.set("b3", "0");
 			headers.set("Content-Type", "application/json");

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

@@ -67,7 +67,7 @@ public Call<Void> clone() {
 		@Override
 		protected Void doExecute() {
 			HttpEntity<byte[]> request = new HttpEntity<>(getBody(), getDefaultHeaders());
-			restTemplate.exchange(this.endpoint, HttpMethod.POST, request, Void.class);
+			this.restTemplate.exchange(this.endpoint, HttpMethod.POST, request, Void.class);
 			return null;
 		}
 

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

@@ -69,7 +69,7 @@ protected Void doExecute() {
 
 		@Override
 		protected void doEnqueue(Callback<Void> callback) {
-			sendRequest().subscribe(__ -> callback.onSuccess(null), callback::onError);
+			sendRequest().subscribe((__) -> callback.onSuccess(null), callback::onError);
 		}
 
 		private Mono<ResponseEntity<Void>> sendRequest() {