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change providers map and lock over to an agent based approach for man…
…aging providers
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| package dht | ||
|
|
||
| import ( | ||
| "time" | ||
|
|
||
| u "github.com/jbenet/go-ipfs/util" | ||
| peer "github.com/jbenet/go-ipfs/peer" | ||
| ) | ||
|
|
||
| type ProviderManager struct { | ||
| providers map[u.Key][]*providerInfo | ||
| newprovs chan *addProv | ||
| getprovs chan *getProv | ||
| halt chan struct{} | ||
| } | ||
|
|
||
| type addProv struct { | ||
| k u.Key | ||
| val *peer.Peer | ||
| } | ||
|
|
||
| type getProv struct { | ||
| k u.Key | ||
| resp chan []*peer.Peer | ||
| } | ||
|
|
||
| func NewProviderManager() *ProviderManager { | ||
| pm := new(ProviderManager) | ||
| pm.getprovs = make(chan *getProv) | ||
| pm.newprovs = make(chan *addProv) | ||
| pm.providers = make(map[u.Key][]*providerInfo) | ||
| pm.halt = make(chan struct{}) | ||
| go pm.run() | ||
| return pm | ||
| } | ||
|
|
||
| func (pm *ProviderManager) run() { | ||
| tick := time.NewTicker(time.Hour) | ||
| for { | ||
| select { | ||
| case np := <-pm.newprovs: | ||
| pi := new(providerInfo) | ||
| pi.Creation = time.Now() | ||
| pi.Value = np.val | ||
| arr := pm.providers[np.k] | ||
| pm.providers[np.k] = append(arr, pi) | ||
| case gp := <-pm.getprovs: | ||
| var parr []*peer.Peer | ||
| provs := pm.providers[gp.k] | ||
| for _, p := range provs { | ||
| parr = append(parr, p.Value) | ||
| } | ||
| gp.resp <- parr | ||
| case <-tick.C: | ||
| for k, provs := range pm.providers { | ||
| var filtered []*providerInfo | ||
| for _, p := range provs { | ||
| if time.Now().Sub(p.Creation) < time.Hour * 24 { | ||
| filtered = append(filtered, p) | ||
| } | ||
| } | ||
| pm.providers[k] = filtered | ||
| } | ||
| case <-pm.halt: | ||
| return | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (pm *ProviderManager) AddProvider(k u.Key, val *peer.Peer) { | ||
| pm.newprovs <- &addProv{ | ||
| k: k, | ||
| val: val, | ||
| } | ||
| } | ||
|
|
||
| func (pm *ProviderManager) GetProviders(k u.Key) []*peer.Peer { | ||
| gp := new(getProv) | ||
| gp.k = k | ||
| gp.resp = make(chan []*peer.Peer) | ||
| pm.getprovs <- gp | ||
| return <-gp.resp | ||
| } |