CODEWITHSUNDEEP
javascalatwittertracefinagle
stackoverflower
stackoverflower

Reputation: 4073

What is twitter's Future.trace() method used for?

The class com.twitter.util.Future has a method Future.trace(), return type is com.twitter.util.Future.Tracer (this can be found in the compiled Java class)

However, I couldn't find that method in the original Scala code or in the doc. Do you know where I can find the usage or source code for that method?

Why I'm doing this: I'm trying to implement my own tracing framework using Finagle trace.

Upvotes: 2

Views: 470

Answers (2)

Steve Gury
Steve Gury

Reputation: 15658

Future.trace is actually an old member of the Future object. It was used to enable registration of call stack every time you link two asynchronous computations together with map/flatMap. This feature wasn't very popular, so we just remove it.

If you want to look at a tracing Framework you should look at zipkin, and finagle-zipkin that's basically an open-source implementation of Google's Dapper (See paper)

Upvotes: 3

stackoverflower
stackoverflower

Reputation: 4073

It is a version problem.

The Java code package has the following signature

<dependency>
  <groupId>com.twitter</groupId>
  <artifactId>util-core</artifactId>
  <version>5.3.1</version>
</dependency>

but the document and the source code are > 6.0.5

There seems to have been a radical change in the source code between the versions.

Upvotes: 0

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