// When the auction has completed, perform the following logic.
func CloseAuction(offerId int, bid *m.Bid) {
auctionMap.Remove(offerId)
// Check if the broker has enough inventory
offerKeyId := fmt.Sprintf("%s:%d", OFFERS, offerId)
offerKey, _ := as.NewKey(NAMESPACE, OFFERS, offerKeyId)
offerRec, _ := db.Get(readPolicy, offerKey)
sellerId := offerRec.Bins["broker_id"].(int)
// add to buyer's inventory and reduce credit
buyerKeyId := fmt.Sprintf("%s:%d", BROKERS, bid.BrokerId)
buyerKey, _ := as.NewKey(NAMESPACE, BROKERS, buyerKeyId)
db.Operate(writePolicy, buyerKey,
as.AddOp(as.NewBin(offerRec.Bins["ticker"].(string), offerRec.Bins["quantity"].(int))),
as.AddOp(as.NewBin("credit", -1*offerRec.Bins["quantity"].(int)*int(bid.Price))),
)
// reduce seller's inventory and add to credit
sellerKeyId := fmt.Sprintf("%s:%d", BROKERS, sellerId)
sellerKey, _ := as.NewKey(NAMESPACE, BROKERS, sellerKeyId)
db.Operate(writePolicy, sellerKey,
as.AddOp(as.NewBin(offerRec.Bins["ticker"].(string), -1*offerRec.Bins["quantity"].(int))),
as.AddOp(as.NewBin("credit", offerRec.Bins["quantity"].(int)*int(bid.Price))),
)
// mark the bid as winner
bidKeyId := fmt.Sprintf("%s:%d", BIDS, bid.Id)
bidKey, _ := as.NewKey(NAMESPACE, BIDS, bidKeyId)
db.Put(writePolicy, bidKey, as.BinMap{"winner": 1})
db.Put(writePolicy, offerKey, as.BinMap{"finished": 1, "winner": bid.Id})
}
func send(cache []Event) {
fmt.Println("sending %s", len(cache))
for index, element := range cache {
_ = index
//fmt.Println(element.id, element.event, element.value)
//fmt.Println(index)
key, _ := as.NewKey("test", "totals", "total_votes")
ops := []*as.Operation{
as.AddOp(as.NewBin("total_votes", 1)), // add the value of the bin to the existing value
as.GetOp(), // get the value of the record after all operations are executed
}
_, _ = client.Operate(nil, key, ops...)
key, _ = as.NewKey("test", "totals", element.value)
ops = []*as.Operation{
as.AddOp(as.NewBin(element.value, 1)), // add the value of the bin to the existing value
as.GetOp(), // get the value of the record after all operations are executed
}
_, _ = client.Operate(nil, key, ops...)
//panicOnError(err)
//fmt.Println(rec)
// client.Set(element.id, element.value)
// client.Get(element.id)
// client.Incr("total_votes")
// client.Incr(element.value)
}
}
func runExample(client *as.Client) {
// Write initial record.
key, _ := as.NewKey(*shared.Namespace, *shared.Set, "opkey")
bin1 := as.NewBin("optintbin", 7)
bin2 := as.NewBin("optstringbin", "string value")
log.Printf("Put: namespace=%s set=%s key=%s bin1=%s value1=%s bin2=%s value2=%s",
key.Namespace(), key.SetName(), key.Value(), bin1.Name, bin1.Value, bin2.Name, bin2.Value)
client.PutBins(shared.WritePolicy, key, bin1, bin2)
// Add integer, write new string and read record.
bin3 := as.NewBin(bin1.Name, 4)
bin4 := as.NewBin(bin2.Name, "new string")
log.Println("Add: ", bin3.Value)
log.Println("Write: ", bin4.Value)
log.Println("Read:")
record, err := client.Operate(shared.WritePolicy, key, as.AddOp(bin3), as.PutOp(bin4), as.GetOp())
shared.PanicOnError(err)
if record == nil {
log.Fatalf(
"Failed to get: namespace=%s set=%s key=%s",
key.Namespace(), key.SetName(), key.Value())
}
binExpected := as.NewBin(bin3.Name, 11)
shared.ValidateBin(key, binExpected, record)
shared.ValidateBin(key, bin4, record)
}
// Increment a bin, being used as a sequence generator.
func nextSeq(seq string) (int, error) {
keyId := fmt.Sprintf("%s:%s", SEQUENCES, seq)
key, err := as.NewKey(NAMESPACE, SEQUENCES, keyId)
if err != nil {
return 0, err
}
rec, err := db.Operate(
writePolicy,
key,
as.AddOp(as.NewBin("seq", 1)),
as.GetOpForBin("seq"),
)
if err != nil {
return 0, err
}
if seq, exists := rec.Bins["seq"]; !exists || int(seq.(int)) <= 0 {
return 0, fmt.Errorf("sequence not found: %s", seq)
}
return rec.Bins["seq"].(int), nil
}
func runExample(client *as.Client) {
key, err := as.NewKey(*shared.Namespace, *shared.Set, "addkey")
shared.PanicOnError(err)
binName := "addbin"
// Delete record if it already exists.
client.Delete(shared.WritePolicy, key)
// Perform some adds and check results.
bin := as.NewBin(binName, 10)
log.Println("Initial add will create record. Initial value is ", bin.Value, ".")
client.AddBins(shared.WritePolicy, key, bin)
bin = as.NewBin(binName, 5)
log.Println("Add ", bin.Value, " to existing record.")
client.AddBins(shared.WritePolicy, key, bin)
record, err := client.Get(shared.Policy, key, bin.Name)
shared.PanicOnError(err)
if record == nil {
log.Fatalf(
"Failed to get: namespace=%s set=%s key=%s",
key.Namespace(), key.SetName(), key.Value())
}
// The value received from the server is an unsigned byte stream.
// Convert to an integer before comparing with expected.
received := record.Bins[bin.Name]
expected := 15
if received == expected {
log.Printf("Add successful: ns=%s set=%s key=%s bin=%s value=%s",
key.Namespace(), key.SetName(), key.Value(), bin.Name, received)
} else {
log.Fatalf("Add mismatch: Expected %d. Received %d.", expected, received)
}
// Demonstrate add and get combined.
bin = as.NewBin(binName, 30)
log.Println("Add ", bin.Value, " to existing record.")
record, err = client.Operate(shared.WritePolicy, key, as.AddOp(bin), as.GetOp())
shared.PanicOnError(err)
expected = 45
received = record.Bins[bin.Name]
if received == expected {
log.Printf("Add successful: ns=%s set=%s key=%s bin=%s value=%s",
key.Namespace(), key.SetName(), key.Value(), bin.Name, received)
} else {
log.Fatalf("Add mismatch: Expected %d. Received %d.", expected, received)
}
}
// NewServiceCodeVersion generates a version number of the code and returns it.
func NewServiceCodeVersion(
as *aerospike.Client, env string, service string) (
newVersion int64, err error) {
key, err := serviceKey(env, service)
if err != nil {
return 0, err
}
bin := aerospike.NewBin("NextVer", 1)
record, err := as.Operate(
nil, key, aerospike.AddOp(bin),
aerospike.GetOpForBin("NextVer"))
if err != nil {
return 0, err
}
return int64(record.Bins["NextVer"].(int)), nil
}
// Offer a Parcel of Stock for Sale
func (command *Command) Offer(r *http.Request, offer *m.Offer, offerId *int) error {
var err error
*offerId = 0
// Check if the broker has enough inventory
brokerKeyId := fmt.Sprintf("%s:%d", BROKERS, offer.BrokerId)
brokerKey, err := as.NewKey(NAMESPACE, BROKERS, brokerKeyId)
if err != nil {
return err
}
brokerRec, err := db.Get(readPolicy, brokerKey, offer.Ticker, offer.Ticker+"_os")
if err != nil {
return err
}
if brokerRec == nil {
return fmt.Errorf("Broker not found %d", offer.BrokerId)
}
// fmt.Printf("%#v\n\n", brokerRec)
if brokerRec.Bins == nil || len(brokerRec.Bins) == 0 {
return errors.New("Broker does not have any inventory of the stock")
} else if _, exists := brokerRec.Bins[offer.Ticker+"_os"]; !exists {
// set the outstanding as much as the inventory - bin quantity
err := db.Put(writePolicy, brokerKey, as.BinMap{offer.Ticker + "_os": int(int(brokerRec.Bins[offer.Ticker].(int)) - offer.Quantity)})
if err != nil {
return err
}
} else {
opRec, err := db.Operate(
writePolicy,
brokerKey,
as.AddOp(as.NewBin(offer.Ticker+"_os", -1*int(offer.Quantity))),
as.GetOp(),
)
if err != nil {
return err
}
if inventory, exists := opRec.Bins[offer.Ticker+"_os"]; !exists || int(inventory.(int)) < offer.Quantity {
db.Add(writePolicy, brokerKey, as.BinMap{offer.Ticker + "_os": offer.Quantity})
return errors.New("Not enough inventory")
}
}
// offer.Id = int(atomic.AddInt64(&offerIdSeq, 1))
offer.Id, err = nextSeq("offer")
if err != nil {
return nil
}
// put the offer up
offerKeyId := fmt.Sprintf("%s:%d", OFFERS, offer.Id)
offerKey, err := as.NewKey(NAMESPACE, OFFERS, offerKeyId)
if err != nil {
return err
}
offerBins := as.BinMap{
"offer_id": offer.Id,
"broker_id": offer.BrokerId,
"ticker": offer.Ticker,
"quantity": offer.Quantity,
"price": offer.Price,
"ttl": offer.TTL,
}
if err = db.Put(writePolicy, offerKey, offerBins); err != nil {
return err
}
*offerId = offer.Id
broadcast <- &m.Notification{
Version: "2.0",
Method: "Offer",
Params: *offer,
}
go Auctioner(offer.Id, offer.TTL)
return nil
}