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ClientHttpObservationDocumentation.java
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ClientHttpObservationDocumentation.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.http.client.observation;
import io.micrometer.common.KeyValue;
import io.micrometer.common.docs.KeyName;
import io.micrometer.observation.Observation;
import io.micrometer.observation.ObservationConvention;
import io.micrometer.observation.docs.ObservationDocumentation;
import org.springframework.http.client.ClientHttpRequestFactory;
/**
* Documented {@link io.micrometer.common.KeyValue KeyValues} for {@link ClientHttpRequestFactory HTTP client} observations.
* <p>This class is used by automated tools to document KeyValues attached to the HTTP client observations.
*
* @author Brian Clozel
* @since 6.0
*/
public enum ClientHttpObservationDocumentation implements ObservationDocumentation {
/**
* Observation created for a client HTTP exchange.
*/
HTTP_REQUEST {
@Override
public Class<? extends ObservationConvention<? extends Observation.Context>> getDefaultConvention() {
return DefaultClientRequestObservationConvention.class;
}
@Override
public KeyName[] getLowCardinalityKeyNames() {
return LowCardinalityKeyNames.values();
}
@Override
public KeyName[] getHighCardinalityKeyNames() {
return HighCardinalityKeyNames.values();
}
};
public enum LowCardinalityKeyNames implements KeyName {
/**
* Name of HTTP request method or {@value KeyValue#NONE_VALUE} if the request could not be created.
*/
METHOD {
@Override
public String asString() {
return "method";
}
},
/**
* URI template used for HTTP request, or {@value KeyValue#NONE_VALUE} if none was provided.
*/
URI {
@Override
public String asString() {
return "uri";
}
},
/**
* HTTP response raw status code, or {@code "IO_ERROR"} in case of {@code IOException},
* or {@code "CLIENT_ERROR"} if no response was received.
*/
STATUS {
@Override
public String asString() {
return "status";
}
},
/**
* Name of the exception thrown during the exchange, or {@value KeyValue#NONE_VALUE} if no exception happened.
*/
EXCEPTION {
@Override
public String asString() {
return "exception";
}
},
/**
* Outcome of the HTTP client exchange.
* @see org.springframework.http.HttpStatus.Series
*/
OUTCOME {
@Override
public String asString() {
return "outcome";
}
}
}
public enum HighCardinalityKeyNames implements KeyName {
/**
* HTTP request URI.
*/
HTTP_URL {
@Override
public String asString() {
return "http.url";
}
},
/**
* Client name derived from the request URI host.
*/
CLIENT_NAME {
@Override
public String asString() {
return "client.name";
}
}
}
}