func (rs *s) Providers(c *cid.Cid) []pstore.PeerInfo {
rs.delayConf.Query.Wait() // before locking
rs.lock.RLock()
defer rs.lock.RUnlock()
k := c.KeyString()
var ret []pstore.PeerInfo
records, ok := rs.providers[k]
if !ok {
return ret
}
for _, r := range records {
if time.Now().Sub(r.Created) > rs.delayConf.ValueVisibility.Get() {
ret = append(ret, r.Peer)
}
}
for i := range ret {
j := rand.Intn(i + 1)
ret[i], ret[j] = ret[j], ret[i]
}
return ret
}
func wantlistContains(wantlist *pb.Message_Wantlist, c *cid.Cid) bool {
for _, e := range wantlist.GetEntries() {
if e.GetBlock() == c.KeyString() {
return true
}
}
return false
}
func (m *impl) addEntry(c *cid.Cid, priority int, cancel bool) {
k := c.KeyString()
e, exists := m.wantlist[k]
if exists {
e.Priority = priority
e.Cancel = cancel
} else {
m.wantlist[k] = Entry{
Entry: &wantlist.Entry{
Cid: c,
Priority: priority,
},
Cancel: cancel,
}
}
}
func (rs *s) Announce(p pstore.PeerInfo, c *cid.Cid) error {
rs.lock.Lock()
defer rs.lock.Unlock()
k := c.KeyString()
_, ok := rs.providers[k]
if !ok {
rs.providers[k] = make(map[peer.ID]providerRecord)
}
rs.providers[k][p.ID] = providerRecord{
Created: time.Now(),
Peer: p,
}
return nil
}
// if ok == false has is inconclusive
// if ok == true then has respons to question: is it contained
func (b *arccache) hasCached(k *cid.Cid) (has bool, ok bool) {
b.total.Inc()
if k == nil {
log.Error("nil cid in arccache")
// Return cache invalid so the call to blockstore happens
// in case of invalid key and correct error is created.
return false, false
}
h, ok := b.arc.Get(k.KeyString())
if ok {
b.hits.Inc()
return h.(bool), true
}
return false, false
}
// taskKey returns a key that uniquely identifies a task.
func taskKey(p peer.ID, k *cid.Cid) string {
return string(p) + k.KeyString()
}
func (m *impl) Cancel(k *cid.Cid) {
delete(m.wantlist, k.KeyString())
m.addEntry(k, 0, true)
}
func CidToDsKey(k *cid.Cid) ds.Key {
return NewKeyFromBinary(k.KeyString())
}
func (b *arccache) addCache(c *cid.Cid, has bool) {
b.arc.Add(c.KeyString(), has)
}