/
OpenTracingServer.java
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/
OpenTracingServer.java
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/*
* Copyright © 2021 Apple Inc. and the ServiceTalk project 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
*
* 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 io.servicetalk.examples.http.opentracing;
import io.servicetalk.http.netty.HttpClients;
import io.servicetalk.http.netty.HttpServers;
import io.servicetalk.opentracing.http.TracingHttpServiceFilter;
import io.servicetalk.opentracing.inmemory.DefaultInMemoryTracer;
import io.servicetalk.opentracing.zipkin.publisher.ZipkinPublisher;
import io.servicetalk.opentracing.zipkin.publisher.reporter.HttpReporter;
import io.opentracing.Tracer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.net.InetSocketAddress;
import static io.servicetalk.opentracing.asynccontext.AsyncContextInMemoryScopeManager.SCOPE_MANAGER;
/**
* A server that does distributed tracing.
*/
public final class OpenTracingServer {
private static final Logger LOGGER = LoggerFactory.getLogger(OpenTracingServer.class);
public static void main(String[] args) throws Exception {
// Publishing to Zipkin is optional, but demonstrated for completeness.
final InetSocketAddress bindAddress = new InetSocketAddress(8080);
final String serviceName = "servicetalk-test-server";
try (ZipkinPublisher zipkinPublisher = new ZipkinPublisher.Builder(serviceName,
// Use ServiceTalk's HTTP client to publish spans to Zipkin's HTTP API (run ZipkinServerSimulator).
new HttpReporter.Builder(HttpClients.forSingleAddress("localhost", 8081)).build())
.localAddress(bindAddress)
.build();
Tracer tracer = new DefaultInMemoryTracer.Builder(SCOPE_MANAGER).addListener(zipkinPublisher).build()) {
HttpServers.forAddress(bindAddress)
.appendServiceFilter(new TracingHttpServiceFilter(tracer, serviceName))
.listenBlockingAndAwait((ctx, request, responseFactory) -> {
LOGGER.info("processed request {}", request.toString((name, value) -> value));
return responseFactory.ok();
}).awaitShutdown();
}
}
}