86 lines
1.9 KiB
Go
86 lines
1.9 KiB
Go
package state
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import (
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abci "github.com/tendermint/abci/types"
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"github.com/tendermint/basecoin/types"
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eyes "github.com/tendermint/merkleeyes/client"
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"github.com/tendermint/tmlibs/log"
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)
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// CONTRACT: State should be quick to copy.
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// See CacheWrap().
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type State struct {
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chainID string
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store types.KVStore
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readCache map[string][]byte // optional, for caching writes to store
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writeCache *types.KVCache // optional, for caching writes w/o writing to store
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logger log.Logger
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}
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func NewState(store types.KVStore, l log.Logger) *State {
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return &State{
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chainID: "",
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store: store,
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readCache: make(map[string][]byte),
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writeCache: nil,
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logger: l,
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}
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}
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func (s *State) SetChainID(chainID string) {
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s.chainID = chainID
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s.store.Set([]byte("base/chain_id"), []byte(chainID))
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}
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func (s *State) GetChainID() string {
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if s.chainID != "" {
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return s.chainID
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}
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s.chainID = string(s.store.Get([]byte("base/chain_id")))
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return s.chainID
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}
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func (s *State) Get(key []byte) (value []byte) {
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if s.readCache != nil { //if not a cachewrap
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value, ok := s.readCache[string(key)]
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if ok {
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return value
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}
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}
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return s.store.Get(key)
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}
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func (s *State) Set(key []byte, value []byte) {
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if s.readCache != nil { //if not a cachewrap
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s.readCache[string(key)] = value
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}
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s.store.Set(key, value)
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}
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func (s *State) CacheWrap() *State {
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cache := types.NewKVCache(s)
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return &State{
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chainID: s.chainID,
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store: cache,
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readCache: nil,
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writeCache: cache,
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logger: s.logger,
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}
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}
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// NOTE: errors if s is not from CacheWrap()
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func (s *State) CacheSync() {
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s.writeCache.Sync()
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}
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func (s *State) Commit() abci.Result {
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switch s.store.(type) {
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case *eyes.Client:
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s.readCache = make(map[string][]byte)
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return s.store.(*eyes.Client).CommitSync()
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default:
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return abci.NewError(abci.CodeType_InternalError, "can only use Commit if store is merkleeyes")
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}
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}
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