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test: check total blocks sent when theres a restart (#140)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| package cidsets | ||
|
|
||
| import ( | ||
| "sync" | ||
|
|
||
| "github.com/ipfs/go-cid" | ||
| "github.com/ipfs/go-datastore" | ||
| "github.com/ipfs/go-datastore/namespace" | ||
| "github.com/ipfs/go-datastore/query" | ||
| ) | ||
|
|
||
| // SetID is a unique ID for a CID set | ||
| type SetID string | ||
|
|
||
| // CIDSetManager keeps track of several CID sets, by SetID | ||
| type CIDSetManager struct { | ||
| ds datastore.Datastore | ||
| lk sync.Mutex | ||
| sets map[SetID]*cidSet | ||
| } | ||
|
|
||
| func NewCIDSetManager(ds datastore.Datastore) *CIDSetManager { | ||
| return &CIDSetManager{ds: ds, sets: make(map[SetID]*cidSet)} | ||
| } | ||
|
|
||
| // InsertSetCID inserts a CID into a CID set. | ||
| // Returns true if the set already contained the CID. | ||
| func (mgr *CIDSetManager) InsertSetCID(sid SetID, c cid.Cid) (exists bool, err error) { | ||
| return mgr.getSet(sid).Insert(c) | ||
| } | ||
|
|
||
| // DeleteSet deletes a CID set | ||
| func (mgr *CIDSetManager) DeleteSet(sid SetID) error { | ||
| return mgr.getSet(sid).Truncate() | ||
| } | ||
|
|
||
| // getSet gets the cidSet for the given SetID | ||
| func (mgr *CIDSetManager) getSet(sid SetID) *cidSet { | ||
| mgr.lk.Lock() | ||
| defer mgr.lk.Unlock() | ||
|
|
||
| s, ok := mgr.sets[sid] | ||
| if !ok { | ||
| s = NewCIDSet(mgr.getSetDS(sid)) | ||
| mgr.sets[sid] = s | ||
| } | ||
| return s | ||
| } | ||
|
|
||
| // getSetDS gets the wrapped datastore for the given SetID | ||
| func (mgr *CIDSetManager) getSetDS(sid SetID) datastore.Batching { | ||
| setDSKey := datastore.NewKey(string(sid) + "/cids") | ||
| return namespace.Wrap(mgr.ds, setDSKey) | ||
| } | ||
|
|
||
| // cidSet persists a set of CIDs | ||
| type cidSet struct { | ||
| lk sync.Mutex | ||
| ds datastore.Batching | ||
| } | ||
|
|
||
| func NewCIDSet(ds datastore.Batching) *cidSet { | ||
| return &cidSet{ds: ds} | ||
| } | ||
|
|
||
| // Insert a CID into the set. | ||
| // Returns true if the the CID was already in the set. | ||
| func (s *cidSet) Insert(c cid.Cid) (exists bool, err error) { | ||
| s.lk.Lock() | ||
| defer s.lk.Unlock() | ||
|
|
||
| k := datastore.NewKey(c.String()) | ||
| has, err := s.ds.Has(k) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| if has { | ||
| return true, nil | ||
| } | ||
| return false, s.ds.Put(k, nil) | ||
| } | ||
|
|
||
| // Truncate removes all CIDs in the set | ||
| func (s *cidSet) Truncate() error { | ||
| s.lk.Lock() | ||
| defer s.lk.Unlock() | ||
|
|
||
| res, err := s.ds.Query(query.Query{KeysOnly: true}) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| entries, err := res.Rest() | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| batched, err := s.ds.Batch() | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| for _, entry := range entries { | ||
| err := batched.Delete(datastore.NewKey(entry.Key)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
|
|
||
| return batched.Commit() | ||
| } |
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