func TestRandN(t *testing.T) {
var seed uint32 = uint32(1)
dlog.Printf("seed %v\n", seed)
for i := 0; i < 1000; i++ {
x := RandN(&seed, 10)
// No idea how to test a random number generator, just look at the results for now.
dlog.Println(x, seed)
_ = x
}
}
// TODO: Check and see if I need more tx.MaybeWrite()s
func StoreBidTxn(t Query, tx ETransaction) (*Result, error) {
var r *Result = nil
user := t.U1
item := t.U2
price := int32(t.U3)
if price < 0 {
log.Fatalf("price %v %v", price, t.U3)
}
// insert bid
n := tx.UID('b')
bid_key := BidKey(n)
bid := &Bid{
ID: uint64(n),
Item: item,
Bidder: user,
Price: price,
}
tx.Write(bid_key, bid, WRITE)
// update # bids per item
err := tx.WriteInt32(NumBidsKey(item), 1, SUM)
if err != nil {
tx.RelinquishKey(n, 'b')
tx.Abort()
dlog.Printf("StoreBidTxn(): Couldn't write numbids for item %v; %v\n", item, err)
return nil, err
}
// update max bid?
high := MaxBidKey(item)
tx.MaybeWrite(high)
err = tx.WriteInt32(high, price, MAX)
if err != nil {
tx.RelinquishKey(n, 'b')
dlog.Println("Aborting because of max")
tx.Abort()
dlog.Printf("StoreBidTxn(): Couldn't write maxbid for item %v; %v\n", item, err)
return nil, err
}
bidder := MaxBidBidderKey(item)
err = tx.WriteOO(bidder, price, user, OOWRITE)
if err != nil {
tx.RelinquishKey(n, 'b')
dlog.Println("Aborting because of max oowrite")
tx.Abort()
dlog.Printf("StoreBidTxn(): Couldn't write maxbidder for item %v; %v\n", item, err)
return nil, err
}
// add to item's bid list
e := Entry{int(bid.Price), bid_key, 0}
err = tx.WriteList(BidsPerItemKey(item), e, LIST)
if err != nil {
tx.RelinquishKey(n, 'b')
tx.Abort()
dlog.Printf("StoreBidTxn(): Error adding to bids per item key %v! %v\n", item, err)
return nil, err
}
if tx.Commit() == 0 {
tx.RelinquishKey(n, 'b')
dlog.Printf("StoreBidTxn(): Abort item %v\n", item)
return r, EABORT
}
if *Allocate {
r = &Result{uint64(n)}
// dlog.Printf("User %v Bid on item %v for %v dollars\n", user, item, price)
}
return r, nil
}