Hatch: A Stack-based Performance Logger

• Check out the GettingStarted page!

Introduction

Logging is still the simplest and most popular way of tracing a program's execution. Even with many advanced tools at our disposal, we still lean toward simple I Am Here. style debugging.

Hatch is a simple stack-based performance logger. Just by adding begin/end style calls into your code, you can trace how much time it is taking to perform a specific request.

Example Output

 [135ms] request share purchase
   [5ms] validate purchase request
   [40ms] check account balances
    [39ms] synchronous balance request
   [30ms] read uncommitted share availability check
   [55ms] queue request
     [30ms] persist message to queue
     [15ms] write audit log

Features

• Threads can request tracing on a per-request basis, reducing clutter
• Enable or disable globally at runtime without restarting.
• Only log traces that meet specific criteria ("Only log requests that took over 1000ms during business hours.")
• Log to System.out or log4j (or extend the basic logger to log wherever you want, see AdvancedHatchUsage).

More Information

• Poke around the source to find out more.
• See the release notes history.