Minimal gocql tracing example

main.go

package main

import (
	"github.com/gocql/gocql"
	"log"
)

type MyTracer struct { }

func (t *MyTracer) Trace(traceId []byte) {
	// It's possible to query the `system_tracing` tables in here if the session is added to `MyTracer`; however care
	// much be taken because the tracing tables are populated asynchronously.
	uuid, _ := gocql.UUIDFromBytes(traceId)
	log.Printf("Trace ID: %s\n", uuid)
}

// Minimal example of using tracing with gocql. The resulting tracing ID can be used to query `system_tracing` tables via:
//
// "SELECT * FROM system_traces.sessions WHERE session_id = ?"
// "SELECT * FROM system_traces.events WHERE session_id = ?"
//
// The entries for these table are loaded asynchronously and won't be available immediately.

func main()  {
	cluster := gocql.NewCluster("127.0.0.1")

	session, err := cluster.CreateSession()
	if err != nil {
		log.Fatalf("Unable to create session %v", err)
	}

	session.SetTrace(&MyTracer{})

	defer session.Close()


	// Run queries
}