forked from newrelic/go-agent
/
main.go
49 lines (40 loc) · 1.22 KB
/
main.go
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// Copyright 2020 New Relic Corporation. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package main
import (
"context"
"database/sql"
"fmt"
"os"
"time"
newrelic "github.com/newrelic/go-agent"
_ "github.com/newrelic/go-agent/_integrations/nrpq"
)
func mustGetEnv(key string) string {
if val := os.Getenv(key); "" != val {
return val
}
panic(fmt.Sprintf("environment variable %s unset", key))
}
func main() {
// docker run --rm -e POSTGRES_PASSWORD=docker -p 5432:5432 postgres
db, err := sql.Open("nrpostgres", "host=localhost port=5432 user=postgres dbname=postgres password=docker sslmode=disable")
if err != nil {
panic(err)
}
cfg := newrelic.NewConfig("PostgreSQL App", mustGetEnv("NEW_RELIC_LICENSE_KEY"))
cfg.Logger = newrelic.NewDebugLogger(os.Stdout)
app, err := newrelic.NewApplication(cfg)
if nil != err {
panic(err)
}
app.WaitForConnection(5 * time.Second)
txn := app.StartTransaction("postgresQuery", nil, nil)
ctx := newrelic.NewContext(context.Background(), txn)
row := db.QueryRowContext(ctx, "SELECT count(*) FROM pg_catalog.pg_tables")
var count int
row.Scan(&count)
txn.End()
app.Shutdown(5 * time.Second)
fmt.Println("number of entries in pg_catalog.pg_tables", count)
}