/
feel.go
62 lines (56 loc) · 1.18 KB
/
feel.go
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package main
import (
"database/sql"
"fmt"
"github.com/bmizerany/pq"
"net/url"
"os"
"os/signal"
"syscall"
"time"
)
func main() {
urls := [...]string{
"postgres://localhost/hgmnz?sslmode=disable",
}
for _, url := range urls {
go feel(url)
}
sigs := make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGINT)
<-sigs
fmt.Println("Exiting program")
os.Exit(0)
}
func feel(databaseUrl string) {
dataSource, err := pq.ParseURL(databaseUrl)
if err != nil {
fmt.Printf("Unable to parse database url (%s)", databaseUrl)
panic(err)
}
u, err := url.Parse(databaseUrl)
if err != nil {
panic(err)
}
databaseName := u.Path[1:]
db, err := sql.Open("postgres", dataSource)
if err != nil {
fmt.Println("Unable to connect to database")
}
for {
row := db.QueryRow("SELECT count(*) from pg_stat_activity")
var count uint16
err = row.Scan(&count)
if err != nil {
panic(err)
}
row = db.QueryRow("SELECT pg_database_size($1)", databaseName)
var bytes uint64
err = row.Scan(&bytes)
if err != nil {
panic(err)
}
o := observation{connections: count, databaseUrl: databaseUrl, bytes: bytes, serviceAvailable: true, updatedAt: time.Now()}
o.persist()
}
}