io.micronaut.tracing.opentelemetry.interceptor.AbstractOpenTelemetryTraceInterceptor Maven / Gradle / Ivy

Go to download
/*
 * Copyright 2017-2022 original 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 io.micronaut.tracing.opentelemetry.interceptor;

import io.micronaut.aop.InterceptPhase;
import io.micronaut.aop.MethodInterceptor;
import io.micronaut.aop.MethodInvocationContext;
import io.micronaut.core.annotation.AnnotationMetadata;
import io.micronaut.core.type.Argument;
import io.micronaut.tracing.annotation.SpanTag;
import io.opentelemetry.api.trace.Span;
import io.opentelemetry.instrumentation.api.instrumenter.Instrumenter;
import io.opentelemetry.instrumentation.api.instrumenter.util.ClassAndMethod;
import jakarta.inject.Named;

/**
 * Implements tracing logic for {@code ContinueSpan} and {@code NewSpan}
 * using the Open Telemetry API.
 *
 * @author Nemanja Mikic
 * @since 4.2.0
 */
public abstract sealed class AbstractOpenTelemetryTraceInterceptor implements MethodInterceptor
    permits ContinueSpanOpenTelemetryTraceInterceptor, NewSpanOpenTelemetryTraceInterceptor {

    protected final Instrumenter instrumenter;

    /**
     * Initialize the interceptor with tracer and conversion service.
     *
     * @param instrumenter the ClassAndMethod Instrumenter
     */
    protected AbstractOpenTelemetryTraceInterceptor(@Named("micronautCodeTelemetryInstrumenter") Instrumenter instrumenter) {
        this.instrumenter = instrumenter;
    }

    @Override
    public int getOrder() {
        return InterceptPhase.TRACE.getPosition();
    }

    public static void tagArguments(MethodInvocationContext context) {
        Argument[] arguments = context.getArguments();
        Object[] parameterValues = context.getParameterValues();
        for (int i = 0; i < arguments.length; i++) {
            Argument argument = arguments[i];
            AnnotationMetadata annotationMetadata = argument.getAnnotationMetadata();
            if (annotationMetadata.hasAnnotation(SpanTag.class)) {
                Object v = parameterValues[i];
                if (v != null) {
                    String tagName = annotationMetadata.stringValue(SpanTag.class).orElse(argument.getName());
                    Span span = Span.current();
                    span.setAttribute(tagName, v.toString());
                }
            }
        }
    }
}