func updateHandler(ctx *fasthttp.RequestCtx) {
n := common.GetQueriesCount(ctx)
worlds := make([]common.World, n)
for i := 0; i < n; i++ {
w := &worlds[i]
fetchRandomWorld(w)
w.RandomNumber = int32(common.RandomWorldNum())
}
// sorting is required for insert deadlock prevention.
sort.Sort(common.WorldsByID(worlds))
txn, err := db.Begin()
if err != nil {
log.Fatalf("Error starting transaction: %s", err)
}
for i := 0; i < n; i++ {
w := &worlds[i]
if _, err = txn.Exec("worldUpdateStmt", w.RandomNumber, w.Id); err != nil {
log.Fatalf("Error updating world row %d: %s", i, err)
}
}
if err = txn.Commit(); err != nil {
log.Fatalf("Error when commiting world rows: %s", err)
}
common.JSONMarshal(ctx, worlds)
}
func queriesHandler(ctx *fasthttp.RequestCtx) {
n := common.GetQueriesCount(ctx)
worlds := make([]common.World, n)
for i := 0; i < n; i++ {
fetchRandomWorld(&worlds[i])
}
common.JSONMarshal(ctx, worlds)
}
func dbHandler(ctx *fasthttp.RequestCtx) {
var w common.World
fetchRandomWorld(&w)
common.JSONMarshal(ctx, &w)
}