Github user ok2c commented on a diff in the pull request:
https://github.com/apache/httpclient/pull/74#discussion_r116229419
--- Diff:
httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/TracingAsyncExec.java
---
@@ -0,0 +1,80 @@
+package org.apache.hc.client5.http.impl.async;
+
+import java.io.IOException;
+import java.net.URISyntaxException;
+
+import org.apache.hc.client5.http.async.AsyncExecCallback;
+import org.apache.hc.client5.http.async.AsyncExecChain;
+import org.apache.hc.client5.http.async.AsyncExecChain.Scope;
+import org.apache.hc.client5.http.async.AsyncExecChainHandler;
+import org.apache.hc.core5.http.EntityDetails;
+import org.apache.hc.core5.http.HttpException;
+import org.apache.hc.core5.http.HttpRequest;
+import org.apache.hc.core5.http.HttpResponse;
+import org.apache.hc.core5.http.nio.AsyncDataConsumer;
+import org.apache.hc.core5.http.nio.AsyncEntityProducer;
+
+import io.opentracing.Span;
+import io.opentracing.Tracer;
+import io.opentracing.Tracer.SpanBuilder;
+import io.opentracing.contrib.spanmanager.DefaultSpanManager;
+import io.opentracing.contrib.spanmanager.SpanManager.ManagedSpan;
+import io.opentracing.tag.Tags;
+
+/**
+ * @author Pavol Loffay
+ */
+public class TracingAsyncExec implements AsyncExecChainHandler {
+
+ private Tracer tracer;
+
+ public TracingAsyncExec(Tracer tracer) {
+ this.tracer = tracer;
+ }
+
+ @Override
+ public void execute(HttpRequest request, AsyncEntityProducer
entityProducer, final Scope scope,
+ AsyncExecChain chain, final AsyncExecCallback asyncExecCallback)
throws HttpException, IOException {
+
+ SpanBuilder spanBuilder = tracer.buildSpan(request.getMethod())
+ .withTag(Tags.SPAN_KIND.getKey(), Tags.SPAN_KIND_CLIENT);
+
+ ManagedSpan current = DefaultSpanManager.getInstance().current();
--- End diff --
1. I may be missing something obvious but what is so difficult about
shoving things into HttpContext?
2. Async client has a different threading model compared to the classic one
thread per socket one, like it or not.
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