Improve formatting (#4970)

* Improve error handling on failed post to http.

* Consistent formatting

Author: Corneil du Plessis

spring-cloud-dataflow-rest-client/src/main/java/org/springframework/cloud/dataflow/rest/client/RuntimeOperations.java

@@ -53,20 +53,20 @@ public interface RuntimeOperations {
 	/**
 	 * Access an HTTP GET exposed actuator resource for a deployed app instance.
 	 *
-	 * @param appId the application id
+	 * @param appId      the application id
 	 * @param instanceId the application instance id
-	 * @param endpoint the relative actuator path, e.g., {@code /info}
+	 * @param endpoint   the relative actuator path, e.g., {@code /info}
 	 * @return the contents as JSON text
 	 */
 	String getFromActuator(String appId, String instanceId, String endpoint);
 
 	/**
 	 * Access an HTTP POST exposed actuator resource for a deployed app instance.
 	 *
-	 * @param appId the application id
+	 * @param appId      the application id
 	 * @param instanceId the application instance id
-	 * @param endpoint the relative actuator path, e.g., {@code /info}
-	 * @param data map representing the data to post on request body
+	 * @param endpoint   the relative actuator path, e.g., {@code /info}
+	 * @param data       map representing the data to post on request body
 	 */
 	Object postToActuator(String appId, String instanceId, String endpoint, Map<String, Object> data);
 
@@ -77,7 +77,7 @@ public interface RuntimeOperations {
 	 * @param instanceId the application instance id
 	 * @param data       data to send to url. The mimetype should be in the Content-Type header if important.
 	 * @param headers    post request headers.
-	 * This method will return an exception
+	 *                   This method will return an exception
 	 */
 	void postToUrl(String appId, String instanceId, byte[] data, HttpHeaders headers);
 }

spring-cloud-dataflow-rest-client/src/main/java/org/springframework/cloud/dataflow/rest/client/RuntimeTemplate.java

@@ -86,7 +86,7 @@ private Link getLink(String relationPath, RepresentationModel<?> resources, bool
 		}
 		return link.orElse(null);
 	}
-	
+
 	@Override
 	public PagedModel<AppStatusResource> status() {
 		String uriTemplate = this.appStatusesUriTemplate.expand().getHref();
@@ -133,7 +133,8 @@ public void postToUrl(String appId, String instanceId, byte[] data, HttpHeaders
 		String uri = appUrlPostUriTemplate.expand(appId, instanceId).getHref();
 		HttpEntity<byte[]> entity = new HttpEntity<>(data, headers);
 		ResponseEntity<String> response = this.restTemplate.exchange(uri, HttpMethod.POST, entity, String.class);
-		if(!response.getStatusCode().is2xxSuccessful()) {
+
+		if (!response.getStatusCode().is2xxSuccessful()) {
 			throw new RuntimeException("POST:exception:" + response.getStatusCode() + ":" + response.getBody());
 		}
 	}