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CustomServerRequestObservationConvention.java
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CustomServerRequestObservationConvention.java
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/*
* 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.docs.integration.observability.config.conventions;
import io.micrometer.common.KeyValue;
import io.micrometer.common.KeyValues;
import org.springframework.http.server.observation.ServerHttpObservationDocumentation;
import org.springframework.http.server.observation.ServerRequestObservationContext;
import org.springframework.http.server.observation.ServerRequestObservationConvention;
public class CustomServerRequestObservationConvention implements ServerRequestObservationConvention {
@Override
public String getName() {
// will be used as the metric name
return "http.server.requests";
}
@Override
public String getContextualName(ServerRequestObservationContext context) {
// will be used for the trace name
return "http " + context.getCarrier().getMethod().toLowerCase();
}
@Override
public KeyValues getLowCardinalityKeyValues(ServerRequestObservationContext context) {
return KeyValues.of(method(context), status(context), exception(context));
}
@Override
public KeyValues getHighCardinalityKeyValues(ServerRequestObservationContext context) {
return KeyValues.of(httpUrl(context));
}
protected KeyValue method(ServerRequestObservationContext context) {
// You should reuse as much as possible the corresponding ObservationDocumentation for key names
return KeyValue.of(ServerHttpObservationDocumentation.LowCardinalityKeyNames.METHOD, context.getCarrier().getMethod());
}
// @fold:on // status(), exception(), httpUrl()...
private KeyValue exception(ServerRequestObservationContext context) {
String exception = (context.getError() != null) ? context.getError().getClass().getSimpleName() : KeyValue.NONE_VALUE;
return KeyValue.of(ServerHttpObservationDocumentation.LowCardinalityKeyNames.EXCEPTION, exception);
}
private KeyValue status(ServerRequestObservationContext context) {
return KeyValue.of(ServerHttpObservationDocumentation.LowCardinalityKeyNames.STATUS, String.valueOf(context.getResponse().getStatus()));
}
private KeyValue httpUrl(ServerRequestObservationContext context) {
return KeyValue.of(ServerHttpObservationDocumentation.HighCardinalityKeyNames.HTTP_URL, context.getCarrier().getRequestURI());
}
// @fold:off
}