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shared_memory_server.go
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/
shared_memory_server.go
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// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package gsharedmemory
import (
"context"
"github.com/ava-labs/avalanchego/chains/atomic"
"github.com/ava-labs/avalanchego/database"
"github.com/ava-labs/avalanchego/ids"
"github.com/ava-labs/avalanchego/vms/rpcchainvm/gsharedmemory/gsharedmemoryproto"
)
// Server is a messenger that is managed over RPC.
type Server struct {
sm atomic.SharedMemory
db database.Database
}
// NewServer returns a vm instance connected to a remote vm instance
func NewServer(sm atomic.SharedMemory, db database.Database) *Server {
return &Server{
sm: sm,
db: db,
}
}
// Put ...
func (s *Server) Put(
_ context.Context,
req *gsharedmemoryproto.PutRequest,
) (*gsharedmemoryproto.PutResponse, error) {
peerChainID, err := ids.ToID(req.PeerChainID)
if err != nil {
return nil, err
}
elems := make([]*atomic.Element, len(req.Elems))
for i, elem := range req.Elems {
elems[i] = &atomic.Element{
Key: elem.Key,
Value: elem.Value,
Traits: elem.Traits,
}
}
batches := make([]database.Batch, len(req.Batches))
for i, reqBatch := range req.Batches {
batch := s.db.NewBatch()
for _, putReq := range reqBatch.Puts {
if err := batch.Put(putReq.Key, putReq.Value); err != nil {
return nil, err
}
}
for _, deleteReq := range reqBatch.Deletes {
if err := batch.Delete(deleteReq.Key); err != nil {
return nil, err
}
}
batches[i] = batch
}
return &gsharedmemoryproto.PutResponse{}, s.sm.Put(peerChainID, elems, batches...)
}
// Get ...
func (s *Server) Get(
_ context.Context,
req *gsharedmemoryproto.GetRequest,
) (*gsharedmemoryproto.GetResponse, error) {
peerChainID, err := ids.ToID(req.PeerChainID)
if err != nil {
return nil, err
}
values, err := s.sm.Get(peerChainID, req.Keys)
return &gsharedmemoryproto.GetResponse{
Values: values,
}, err
}
// Indexed ...
func (s *Server) Indexed(
_ context.Context,
req *gsharedmemoryproto.IndexedRequest,
) (*gsharedmemoryproto.IndexedResponse, error) {
peerChainID, err := ids.ToID(req.PeerChainID)
if err != nil {
return nil, err
}
values, lastTrait, lastKey, err := s.sm.Indexed(
peerChainID,
req.Traits,
req.StartTrait,
req.StartKey,
int(req.Limit),
)
return &gsharedmemoryproto.IndexedResponse{
Values: values,
LastTrait: lastTrait,
LastKey: lastKey,
}, err
}
// Remove ...
func (s *Server) Remove(
_ context.Context,
req *gsharedmemoryproto.RemoveRequest,
) (*gsharedmemoryproto.RemoveResponse, error) {
peerChainID, err := ids.ToID(req.PeerChainID)
if err != nil {
return nil, err
}
batches := make([]database.Batch, len(req.Batches))
for i, reqBatch := range req.Batches {
batch := s.db.NewBatch()
for _, putReq := range reqBatch.Puts {
if err := batch.Put(putReq.Key, putReq.Value); err != nil {
return nil, err
}
}
for _, deleteReq := range reqBatch.Deletes {
if err := batch.Delete(deleteReq.Key); err != nil {
return nil, err
}
}
batches[i] = batch
}
return &gsharedmemoryproto.RemoveResponse{}, s.sm.Remove(peerChainID, req.Keys, batches...)
}