org.springframework.http.client.observation.DefaultClientRequestObservationConvention Maven / Gradle / Ivy
/*
* Copyright 2002-2022 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.http.client.observation;
import java.io.IOException;
import io.micrometer.common.KeyValue;
import io.micrometer.common.KeyValues;
import org.springframework.http.HttpStatus;
import org.springframework.http.HttpStatusCode;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.util.StringUtils;
import static org.springframework.http.client.observation.ClientHttpObservationDocumentation.HighCardinalityKeyNames;
import static org.springframework.http.client.observation.ClientHttpObservationDocumentation.LowCardinalityKeyNames;
/**
* Default implementation for a {@link ClientRequestObservationConvention},
* extracting information from the {@link ClientRequestObservationContext}.
*
* @author Brian Clozel
* @since 6.0
*/
public class DefaultClientRequestObservationConvention implements ClientRequestObservationConvention {
private static final String DEFAULT_NAME = "http.client.requests";
private static final KeyValue URI_NONE = KeyValue.of(LowCardinalityKeyNames.URI, KeyValue.NONE_VALUE);
private static final KeyValue METHOD_NONE = KeyValue.of(LowCardinalityKeyNames.METHOD, KeyValue.NONE_VALUE);
private static final KeyValue STATUS_IO_ERROR = KeyValue.of(LowCardinalityKeyNames.STATUS, "IO_ERROR");
private static final KeyValue STATUS_CLIENT_ERROR = KeyValue.of(LowCardinalityKeyNames.STATUS, "CLIENT_ERROR");
private static final KeyValue HTTP_OUTCOME_SUCCESS = KeyValue.of(LowCardinalityKeyNames.OUTCOME, "SUCCESS");
private static final KeyValue HTTP_OUTCOME_UNKNOWN = KeyValue.of(LowCardinalityKeyNames.OUTCOME, "UNKNOWN");
private static final KeyValue EXCEPTION_NONE = KeyValue.of(LowCardinalityKeyNames.EXCEPTION, KeyValue.NONE_VALUE);
private static final KeyValue HTTP_URL_NONE = KeyValue.of(HighCardinalityKeyNames.HTTP_URL, KeyValue.NONE_VALUE);
private static final KeyValue CLIENT_NAME_NONE = KeyValue.of(HighCardinalityKeyNames.CLIENT_NAME, KeyValue.NONE_VALUE);
private final String name;
/**
* Create a convention with the default name {@code "http.client.requests"}.
*/
public DefaultClientRequestObservationConvention() {
this(DEFAULT_NAME);
}
/**
* Create a convention with a custom name.
* @param name the observation name
*/
public DefaultClientRequestObservationConvention(String name) {
this.name = name;
}
@Override
public String getName() {
return this.name;
}
@Override
public String getContextualName(ClientRequestObservationContext context) {
return "http " + context.getCarrier().getMethod().name().toLowerCase();
}
@Override
public KeyValues getLowCardinalityKeyValues(ClientRequestObservationContext context) {
return KeyValues.of(uri(context), method(context), status(context), exception(context), outcome(context));
}
protected KeyValue uri(ClientRequestObservationContext context) {
if (context.getUriTemplate() != null) {
return KeyValue.of(LowCardinalityKeyNames.URI, context.getUriTemplate());
}
return URI_NONE;
}
protected KeyValue method(ClientRequestObservationContext context) {
if (context.getCarrier() != null) {
return KeyValue.of(LowCardinalityKeyNames.METHOD, context.getCarrier().getMethod().name());
}
else {
return METHOD_NONE;
}
}
protected KeyValue status(ClientRequestObservationContext context) {
ClientHttpResponse response = context.getResponse();
if (response == null) {
return STATUS_CLIENT_ERROR;
}
try {
return KeyValue.of(LowCardinalityKeyNames.STATUS, String.valueOf(response.getStatusCode().value()));
}
catch (IOException ex) {
return STATUS_IO_ERROR;
}
}
protected KeyValue exception(ClientRequestObservationContext context) {
Throwable error = context.getError();
if (error != null) {
String simpleName = error.getClass().getSimpleName();
return KeyValue.of(LowCardinalityKeyNames.EXCEPTION,
StringUtils.hasText(simpleName) ? simpleName : error.getClass().getName());
}
return EXCEPTION_NONE;
}
protected static KeyValue outcome(ClientRequestObservationContext context) {
if (context.getResponse() != null) {
try {
return HttpOutcome.forStatus(context.getResponse().getStatusCode());
}
catch (IOException ex) {
// Continue
}
}
return HTTP_OUTCOME_UNKNOWN;
}
@Override
public KeyValues getHighCardinalityKeyValues(ClientRequestObservationContext context) {
return KeyValues.of(requestUri(context), clientName(context));
}
protected KeyValue requestUri(ClientRequestObservationContext context) {
if (context.getCarrier() != null) {
return KeyValue.of(HighCardinalityKeyNames.HTTP_URL, context.getCarrier().getURI().toASCIIString());
}
return HTTP_URL_NONE;
}
protected KeyValue clientName(ClientRequestObservationContext context) {
if (context.getCarrier() != null && context.getCarrier().getURI().getHost() != null) {
return KeyValue.of(HighCardinalityKeyNames.CLIENT_NAME, context.getCarrier().getURI().getHost());
}
return CLIENT_NAME_NONE;
}
static class HttpOutcome {
static KeyValue forStatus(HttpStatusCode statusCode) {
if (statusCode.is2xxSuccessful()) {
return HTTP_OUTCOME_SUCCESS;
}
else if (statusCode instanceof HttpStatus status) {
return KeyValue.of(LowCardinalityKeyNames.OUTCOME, status.series().name());
}
else {
return HTTP_OUTCOME_UNKNOWN;
}
}
}
}