org.summerclouds.common.sleuth.SleuthTracing Maven / Gradle / Ivy

Go to download
/**
 * Copyright (C) 2022 Mike Hummel ([email protected])
 *
 * 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 org.summerclouds.common.sleuth;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.sleuth.Span;
import org.springframework.cloud.sleuth.Tracer;
import org.summerclouds.common.core.tracing.Getter;
import org.summerclouds.common.core.tracing.IScope;
import org.summerclouds.common.core.tracing.ISpan;
import org.summerclouds.common.core.tracing.ITracing;
import org.summerclouds.common.core.tracing.Setter;

import brave.Tracing;
import brave.propagation.CurrentTraceContext;
import brave.propagation.Propagation;
import brave.propagation.TraceContextOrSamplingFlags;

public class SleuthTracing implements ITracing {

    @Autowired private Tracer tracer;
    @Autowired private Tracing tracing;

    @Override
    public ISpan current() {
        Span span = tracer.currentSpan();
        return new SpanImpl(span);
    }

    @Override
    public IScope enter(ISpan parent, String name, Object... keyValue) {
        Span parentSpan = ((SpanImpl) parent).span();
        Span newSpan = null;
        try (Tracer.SpanInScope ws = tracer.withSpan(parentSpan.start())) {
            newSpan = tracer.nextSpan().name(name);
        }
        newSpan.tag("_thread", Thread.currentThread().toString());
        for (int i = 0; i < keyValue.length - 1; i = i + 2)
            newSpan.tag(String.valueOf(keyValue[i]), String.valueOf(keyValue[i + 1]));

        return new ScopeImpl(tracer, newSpan);
    }

    @Override
    public void cleanup() {
        tracer.withSpan(null);
    }

    @Override
    public IScope enter(String name, Object... keyValue) {
        Span newSpan = tracer.nextSpan().name(name);
        for (int i = 0; i < keyValue.length - 1; i = i + 2)
            newSpan.tag(String.valueOf(keyValue[i]), String.valueOf(keyValue[i + 1]));
        newSpan.tag("_thread", Thread.currentThread().toString());
        return new ScopeImpl(tracer, newSpan);
    }

    @Override
    public String getTraceId() {
        Span span = tracer.currentSpan();
        if (span == null) return "";
        return span.context().traceId();
    }

    @Override
    public String getSpanId() {
        Span span = tracer.currentSpan();
        if (span == null) return "";
        return span.context().spanId();
    }

    @Override
    public void inject(Setter setter) {
        // XXX not sure if it's working !!!
        CurrentTraceContext context = tracing.currentTraceContext();

        tracing.propagation()
                .injector(
                        new Propagation.Setter, String>() {

                            @Override
                            public void put(Setter request, String key, String value) {
                                request.set(key, value);
                            }
                        })
                .inject(context.get(), setter);
    }

    @Override
    public IScope extract(Getter getter) {
        // XXX not sure if it's working !!!
        @SuppressWarnings("unused")
        TraceContextOrSamplingFlags out =
                tracing.propagation()
                        .extractor(
                                new Propagation.Getter, String>() {

                                    @Override
                                    public String get(Getter request, String key) {
                                        return request.get(key);
                                    }
                                })
                        .extract(getter);

        Span span = tracer.currentSpan();
        return new ScopeImpl(tracer, span);
    }
}