forked from hyperledger-archives/burrow
/
registry.go
95 lines (80 loc) · 2.47 KB
/
registry.go
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package state
import (
"fmt"
"github.com/hyperledger/burrow/crypto"
"github.com/hyperledger/burrow/encoding"
"github.com/hyperledger/burrow/execution/registry"
"github.com/hyperledger/burrow/storage"
)
var _ registry.IterableReader = &State{}
func getNode(forest storage.ForestReader, id crypto.Address) (*registry.NodeIdentity, error) {
tree, err := forest.Reader(keys.Registry.Prefix())
if err != nil {
return nil, err
}
nodeBytes, err := tree.Get(keys.Registry.KeyNoPrefix(id))
if err != nil {
return nil, err
} else if nodeBytes == nil {
return nil, nil
}
regNode := new(registry.NodeIdentity)
return regNode, encoding.Decode(nodeBytes, regNode)
}
func (s *ImmutableState) GetNodeByID(id crypto.Address) (*registry.NodeIdentity, error) {
return getNode(s.Forest, id)
}
func (s *State) GetNodeIDsByAddress(net string) ([]crypto.Address, error) {
return s.writeState.nodeStats.GetAddresses(net), nil
}
func (ws *writeState) UpdateNode(id crypto.Address, node *registry.NodeIdentity) error {
if node == nil {
return fmt.Errorf("RegisterNode passed nil node in State")
}
bs, err := encoding.Encode(node)
if err != nil {
return fmt.Errorf("RegisterNode could not encode node: %v", err)
}
return ws.forest.Write(keys.Registry.Prefix(), func(tree *storage.RWTree) error {
prev, err := getNode(ws.forest, id)
if err != nil {
return err
}
ws.nodeStats.Remove(prev)
ws.nodeStats.Insert(node.GetNetworkAddress(), id)
tree.Set(keys.Registry.KeyNoPrefix(id), bs)
return nil
})
}
func (ws *writeState) RemoveNode(id crypto.Address) error {
return ws.forest.Write(keys.Registry.Prefix(), func(tree *storage.RWTree) error {
prev, err := getNode(ws.forest, id)
if err != nil {
return err
}
ws.nodeStats.Remove(prev)
tree.Delete(keys.Registry.KeyNoPrefix(id))
return nil
})
}
func (s *ImmutableState) IterateNodes(consumer func(crypto.Address, *registry.NodeIdentity) error) error {
tree, err := s.Forest.Reader(keys.Registry.Prefix())
if err != nil {
return err
}
return tree.Iterate(nil, nil, true, func(key []byte, value []byte) error {
rn := new(registry.NodeIdentity)
err := encoding.Decode(value, rn)
if err != nil {
return fmt.Errorf("State.IterateNodes() could not iterate over nodes: %v", err)
}
address, err := crypto.AddressFromBytes(key)
if err != nil {
return fmt.Errorf("could not decode key: %v", err)
}
return consumer(address, rn)
})
}
func (s *State) GetNumPeers() int {
return len(s.writeState.nodeStats.Addresses)
}