/
OpenTracingClient.java
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/
OpenTracingClient.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.api.BlockingHttpClient;
import io.servicetalk.http.api.HttpResponse;
import io.servicetalk.http.netty.HttpClients;
import io.servicetalk.opentracing.http.TracingHttpRequesterFilter;
import io.servicetalk.opentracing.inmemory.DefaultInMemoryTracer;
import io.servicetalk.opentracing.zipkin.publisher.ZipkinPublisher;
import io.servicetalk.opentracing.zipkin.publisher.reporter.LoggingReporter;
import io.opentracing.Tracer;
import static io.servicetalk.opentracing.asynccontext.AsyncContextInMemoryScopeManager.SCOPE_MANAGER;
/**
* A client that does distributed tracing.
*/
public final class OpenTracingClient {
public static void main(String[] args) throws Exception {
// Publishing to Zipkin is optional, but demonstrated for completeness.
try (ZipkinPublisher zipkinPublisher = new ZipkinPublisher.Builder("servicetalk-test-client",
LoggingReporter.CONSOLE).build();
Tracer tracer = new DefaultInMemoryTracer.Builder(SCOPE_MANAGER).addListener(zipkinPublisher).build();
BlockingHttpClient client = HttpClients.forSingleAddress("localhost", 8080)
.appendClientFilter(new TracingHttpRequesterFilter(tracer, "servicetalk-test-client"))
.buildBlocking()) {
HttpResponse response = client.request(client.get("/1"));
System.out.println(response.toString((name, value) -> value));
HttpResponse response2 = client.request(client.get("/2"));
System.out.println(response2.toString((name, value) -> value));
}
}
}