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OpenTelemetryRequestSpan.java
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OpenTelemetryRequestSpan.java
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/*
* Copyright (c) 2019 Couchbase, Inc.
*
* 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
*
* http://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 com.couchbase.client.tracing.opentelemetry;
import com.couchbase.client.core.cnc.RequestSpan;
import com.couchbase.client.core.msg.RequestContext;
import io.opentelemetry.api.trace.Span;
import java.time.Instant;
import static com.couchbase.client.core.util.Validators.notNull;
/**
* Wraps an OpenTelemetry span, ready to be passed in into options for each operation into the SDK as a parent.
*/
public class OpenTelemetryRequestSpan implements RequestSpan {
/**
* The OT parent span.
*/
private final Span span;
private OpenTelemetryRequestSpan(final Span span) {
this.span = notNull(span, "Span");
}
/**
* Wraps an OpenTelemetry span so that it can be passed in to the SDK-operation options as a parent.
*
* @param span the span that should act as the parent.
* @return the created wrapped span.
*/
public static OpenTelemetryRequestSpan wrap(final Span span) {
return new OpenTelemetryRequestSpan(span);
}
/**
* Returns the wrapped OpenTelemetry span.
*/
public Span span() {
return span;
}
@Override
public void attribute(String key, String value) {
if (value != null) {
span.setAttribute(key, value);
}
}
@Override
public void attribute(String key, boolean value) {
span.setAttribute(key, value);
}
@Override
public void attribute(String key, long value) {
span.setAttribute(key, value);
}
@Override
public void event(String name, Instant timestamp) {
span.addEvent(name, timestamp);
}
@Override
public void status(StatusCode status) {
io.opentelemetry.api.trace.StatusCode statusCode = io.opentelemetry.api.trace.StatusCode.UNSET;
switch (status) {
case OK:
statusCode = io.opentelemetry.api.trace.StatusCode.OK;
break;
case ERROR:
statusCode = io.opentelemetry.api.trace.StatusCode.ERROR;
break;
}
span.setStatus(statusCode);
}
// Reference: https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/trace/semantic_conventions/exceptions.md
@Override
public void recordException(Throwable err) {
span.recordException(err);
}
@Override
public void end() {
span.end();
}
@Override
public void requestContext(final RequestContext requestContext) {
// no need for the request context in this implementation
}
}