60 lines
1.2 KiB
Go
60 lines
1.2 KiB
Go
package pstoremem
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import (
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"sync"
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peer "github.com/libp2p/go-libp2p-core/peer"
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pstore "github.com/libp2p/go-libp2p-core/peerstore"
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)
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var internKeys = map[string]bool{
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"AgentVersion": true,
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"ProtocolVersion": true,
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}
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type metakey struct {
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id peer.ID
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key string
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}
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type memoryPeerMetadata struct {
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// store other data, like versions
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//ds ds.ThreadSafeDatastore
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ds map[metakey]interface{}
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dslock sync.RWMutex
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interned map[string]interface{}
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}
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var _ pstore.PeerMetadata = (*memoryPeerMetadata)(nil)
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func NewPeerMetadata() pstore.PeerMetadata {
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return &memoryPeerMetadata{
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ds: make(map[metakey]interface{}),
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interned: make(map[string]interface{}),
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}
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}
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func (ps *memoryPeerMetadata) Put(p peer.ID, key string, val interface{}) error {
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ps.dslock.Lock()
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defer ps.dslock.Unlock()
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if vals, ok := val.(string); ok && internKeys[key] {
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if interned, ok := ps.interned[vals]; ok {
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val = interned
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} else {
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ps.interned[vals] = val
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}
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}
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ps.ds[metakey{p, key}] = val
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return nil
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}
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func (ps *memoryPeerMetadata) Get(p peer.ID, key string) (interface{}, error) {
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ps.dslock.RLock()
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defer ps.dslock.RUnlock()
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i, ok := ps.ds[metakey{p, key}]
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if !ok {
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return nil, pstore.ErrNotFound
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}
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return i, nil
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}
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