org.springframework.boot.actuate.metrics.web.reactive.server.WebFluxTags Maven / Gradle / Ivy
/*
* Copyright 2012-2019 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.metrics.web.reactive.server;
import io.micrometer.core.instrument.Tag;
import org.springframework.http.HttpStatus;
import org.springframework.util.StringUtils;
import org.springframework.web.reactive.HandlerMapping;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.util.pattern.PathPattern;
/**
* Factory methods for {@link Tag Tags} associated with a request-response exchange that
* is handled by WebFlux.
*
* @author Jon Schneider
* @author Andy Wilkinson
* @author Michael McFadyen
* @since 2.0.0
*/
public final class WebFluxTags {
private static final Tag URI_NOT_FOUND = Tag.of("uri", "NOT_FOUND");
private static final Tag URI_REDIRECTION = Tag.of("uri", "REDIRECTION");
private static final Tag URI_ROOT = Tag.of("uri", "root");
private static final Tag URI_UNKNOWN = Tag.of("uri", "UNKNOWN");
private static final Tag EXCEPTION_NONE = Tag.of("exception", "None");
private static final Tag OUTCOME_UNKNOWN = Tag.of("outcome", "UNKNOWN");
private static final Tag OUTCOME_INFORMATIONAL = Tag.of("outcome", "INFORMATIONAL");
private static final Tag OUTCOME_SUCCESS = Tag.of("outcome", "SUCCESS");
private static final Tag OUTCOME_REDIRECTION = Tag.of("outcome", "REDIRECTION");
private static final Tag OUTCOME_CLIENT_ERROR = Tag.of("outcome", "CLIENT_ERROR");
private static final Tag OUTCOME_SERVER_ERROR = Tag.of("outcome", "SERVER_ERROR");
private WebFluxTags() {
}
/**
* Creates a {@code method} tag based on the
* {@link org.springframework.http.server.reactive.ServerHttpRequest#getMethod()
* method} of the {@link ServerWebExchange#getRequest()} request of the given
* {@code exchange}.
* @param exchange the exchange
* @return the method tag whose value is a capitalized method (e.g. GET).
*/
public static Tag method(ServerWebExchange exchange) {
return Tag.of("method", exchange.getRequest().getMethodValue());
}
/**
* Creates a {@code status} tag based on the response status of the given
* {@code exchange}.
* @param exchange the exchange
* @return the status tag derived from the response status
*/
public static Tag status(ServerWebExchange exchange) {
HttpStatus status = exchange.getResponse().getStatusCode();
if (status == null) {
status = HttpStatus.OK;
}
return Tag.of("status", String.valueOf(status.value()));
}
/**
* Creates a {@code uri} tag based on the URI of the given {@code exchange}. Uses the
* {@link HandlerMapping#BEST_MATCHING_PATTERN_ATTRIBUTE} best matching pattern if
* available. Falling back to {@code REDIRECTION} for 3xx responses, {@code NOT_FOUND}
* for 404 responses, {@code root} for requests with no path info, and {@code UNKNOWN}
* for all other requests.
* @param exchange the exchange
* @return the uri tag derived from the exchange
*/
public static Tag uri(ServerWebExchange exchange) {
PathPattern pathPattern = exchange
.getAttribute(HandlerMapping.BEST_MATCHING_PATTERN_ATTRIBUTE);
if (pathPattern != null) {
return Tag.of("uri", pathPattern.getPatternString());
}
HttpStatus status = exchange.getResponse().getStatusCode();
if (status != null) {
if (status.is3xxRedirection()) {
return URI_REDIRECTION;
}
if (status == HttpStatus.NOT_FOUND) {
return URI_NOT_FOUND;
}
}
String path = getPathInfo(exchange);
if (path.isEmpty()) {
return URI_ROOT;
}
return URI_UNKNOWN;
}
private static String getPathInfo(ServerWebExchange exchange) {
String path = exchange.getRequest().getPath().value();
String uri = StringUtils.hasText(path) ? path : "/";
return uri.replaceAll("//+", "/").replaceAll("/$", "");
}
/**
* Creates an {@code exception} tag based on the {@link Class#getSimpleName() simple
* name} of the class of the given {@code exception}.
* @param exception the exception, may be {@code null}
* @return the exception tag derived from the exception
*/
public static Tag exception(Throwable exception) {
if (exception != null) {
String simpleName = exception.getClass().getSimpleName();
return Tag.of("exception", StringUtils.hasText(simpleName) ? simpleName
: exception.getClass().getName());
}
return EXCEPTION_NONE;
}
/**
* Creates an {@code outcome} tag based on the response status of the given
* {@code exchange}.
* @param exchange the exchange
* @return the outcome tag derived from the response status
* @since 2.1.0
*/
public static Tag outcome(ServerWebExchange exchange) {
HttpStatus status = exchange.getResponse().getStatusCode();
if (status != null) {
if (status.is1xxInformational()) {
return OUTCOME_INFORMATIONAL;
}
if (status.is2xxSuccessful()) {
return OUTCOME_SUCCESS;
}
if (status.is3xxRedirection()) {
return OUTCOME_REDIRECTION;
}
if (status.is4xxClientError()) {
return OUTCOME_CLIENT_ERROR;
}
return OUTCOME_SERVER_ERROR;
}
return OUTCOME_UNKNOWN;
}
}