Albirew/nyaa-pantsu
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nyaa-pantsu/service/scraper/bucket.go
Jeff 100ecffda7 fix scraper, optimize updates so it doesn't suck massive ass (#367)
* fix scraper, optimize updates so it doesn't suck massive ass

* fucking ass
2017-05-11 14:06:47 -05:00

83 lignes
1,4 Kio
Go

package scraperService
import (
"math/rand"
"net"
"sync"
"github.com/ewhal/nyaa/model"
)
const InitialConnectionID = 0x41727101980
type Bucket struct {
Addr net.Addr
access sync.Mutex
transactions map[uint32]*Transaction
}
func (b *Bucket) NewTransaction(swarms []model.Torrent) (t *Transaction) {
id := rand.Uint32()
// get good id
b.access.Lock()
_, ok := b.transactions[id]
for ok {
id = rand.Uint32()
_, ok = b.transactions[id]
}
t = &Transaction{
TransactionID: id,
bucket: b,
swarms: make([]model.Torrent, len(swarms)),
state: stateSendID,
}
copy(t.swarms[:], swarms[:])
b.transactions[id] = t
b.access.Unlock()
return
}
func (b *Bucket) ForEachTransaction(v func(uint32, *Transaction)) {
clone := make(map[uint32]*Transaction)
b.access.Lock()
for k := range b.transactions {
clone[k] = b.transactions[k]
}
b.access.Unlock()
for k := range clone {
v(k, clone[k])
}
}
func (b *Bucket) Forget(tid uint32) {
b.access.Lock()
_, ok := b.transactions[tid]
if ok {
delete(b.transactions, tid)
}
b.access.Unlock()
}
func (b *Bucket) VisitTransaction(tid uint32, v func(*Transaction)) {
b.access.Lock()
t, ok := b.transactions[tid]
b.access.Unlock()
if ok {
v(t)
} else {
v(nil)
}
}
func NewBucket(a net.Addr) *Bucket {
return &Bucket{
transactions: make(map[uint32]*Transaction),
Addr: a,
}
}