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Less object instantiation in WebMvcTags #12894

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Less object instantiation in WebMvcTags #12894

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21 changes: 14 additions & 7 deletions ...tuator/src/main/java/org/springframework/boot/actuate/metrics/web/servlet/WebMvcTags.java
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Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,14 @@ public final class WebMvcTags {

private static final Tag URI_REDIRECTION = Tag.of("uri", "REDIRECTION");

private static final Tag URI_UNKNOWN = Tag.of("uri", "UNKNOWN");

private static final Tag EXCEPTION_NONE = Tag.of("exception", "None");

private static final Tag STATUS_UNKNOWN = Tag.of("status", "UNKNOWN");

private static final Tag METHOD_UNKNOWN = Tag.of("method", "UNKNOWN");

private WebMvcTags() {
}

Expand All @@ -50,8 +58,7 @@ private WebMvcTags() {
* @return the method tag whose value is a capitalized method (e.g. GET).
*/
public static Tag method(HttpServletRequest request) {
return (request == null ? Tag.of("method", "UNKNOWN")
: Tag.of("method", request.getMethod()));
return request == null ? METHOD_UNKNOWN : Tag.of("method", request.getMethod());
}

/**
Expand All @@ -60,8 +67,8 @@ public static Tag method(HttpServletRequest request) {
* @return the status tag derived from the status of the response
*/
public static Tag status(HttpServletResponse response) {
return (response == null ? Tag.of("status", "UNKNOWN")
: Tag.of("status", ((Integer) response.getStatus()).toString()));
return response == null ? STATUS_UNKNOWN :
Tag.of("status", Integer.toString(response.getStatus()));
}

/**
Expand Down Expand Up @@ -91,7 +98,7 @@ else if (response != null) {
String pathInfo = getPathInfo(request);
return Tag.of("uri", pathInfo.isEmpty() ? "root" : pathInfo);
}
return Tag.of("uri", "UNKNOWN");
return URI_UNKNOWN;
}

private static HttpStatus extractStatus(HttpServletResponse response) {
Expand Down Expand Up @@ -121,8 +128,8 @@ private static String getPathInfo(HttpServletRequest request) {
* @return the exception tag derived from the exception
*/
public static Tag exception(Throwable exception) {
return Tag.of("exception",
(exception == null ? "None" : exception.getClass().getSimpleName()));
return exception == null ? EXCEPTION_NONE :
Tag.of("exception", exception.getClass().getSimpleName());
}

}