Method Execution Metrics Sample

This is a minimal Java 21 + Gradle project that measures and reports execution times of your methods using AspectJ load-time weaving. The aspect wraps every call matching your pointcut, logs “Class.method executed in X ms” to a dedicated log file, then a Gradle task turns that log into an interactive HTML report.

How it works

• The AspectJ agent (aspectjweaver.jar) is attached at runtime (via –javaagent) in both the runSample and test tasks.
• MethodMetricsAspect uses a Pointcut annotation (default: execution(* by.bivis..*(..))) to select which methods to time. You should replace that expression with one matching your own package.
• Each timed call is written by SLF4J/Logback into build/aspect_method_metrics.log.
• The generateMethodMetricsReport task parses the log, computes per-method sum, count, average and a time-series, converts it all to JSON and injects it into docs/methodMetrics/template.html.

Getting started

1. Run tests (with metrics):
   ./gradlew clean test
2. Or run the demo main:
   ./gradlew runSample
3. Generate the report:
   ./gradlew generateMethodMetricsReport
4. Open build/methodMetrics.html in your browser

Result

You’ll get a standalone HTML page with interactive bar charts (average, total time, call count), a pie chart of time-share, a line chart of calls over time, and a searchable, sortable table of all methods.