/
store.go
96 lines (80 loc) · 2.52 KB
/
store.go
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package versiondb
import (
"io"
"time"
"github.com/cosmos/cosmos-sdk/store/cachekv"
"github.com/cosmos/cosmos-sdk/store/listenkv"
"github.com/cosmos/cosmos-sdk/store/tracekv"
"github.com/cosmos/cosmos-sdk/store/types"
"github.com/cosmos/cosmos-sdk/telemetry"
)
const StoreTypeVersionDB = 100
var _ types.KVStore = (*Store)(nil)
// Store Implements types.KVStore
type Store struct {
store VersionStore
storeKey types.StoreKey
version *int64
}
func NewKVStore(store VersionStore, storeKey types.StoreKey, version *int64) *Store {
return &Store{store, storeKey, version}
}
// Implements Store.
func (st *Store) GetStoreType() types.StoreType {
// should have effect, just define an unique indentifier, don't be conflicts with cosmos-sdk's builtin ones.
return StoreTypeVersionDB
}
// Implements Store.
func (st *Store) CacheWrap() types.CacheWrap {
return cachekv.NewStore(st)
}
// CacheWrapWithTrace implements the Store interface.
func (st *Store) CacheWrapWithTrace(w io.Writer, tc types.TraceContext) types.CacheWrap {
return cachekv.NewStore(tracekv.NewStore(st, w, tc))
}
// CacheWrapWithListeners implements the CacheWrapper interface.
func (st *Store) CacheWrapWithListeners(storeKey types.StoreKey, listeners []types.WriteListener) types.CacheWrap {
return cachekv.NewStore(listenkv.NewStore(st, storeKey, listeners))
}
// Implements types.KVStore.
func (st *Store) Get(key []byte) []byte {
defer telemetry.MeasureSince(time.Now(), "store", "versiondb", "get")
value, err := st.store.GetAtVersion(st.storeKey.Name(), key, st.version)
if err != nil {
panic(err)
}
return value
}
// Implements types.KVStore.
func (st *Store) Has(key []byte) (exists bool) {
defer telemetry.MeasureSince(time.Now(), "store", "versiondb", "has")
has, err := st.store.HasAtVersion(st.storeKey.Name(), key, st.version)
if err != nil {
panic(err)
}
return has
}
// Implements types.KVStore.
func (st *Store) Iterator(start, end []byte) types.Iterator {
itr, err := st.store.IteratorAtVersion(st.storeKey.Name(), start, end, st.version)
if err != nil {
panic(err)
}
return itr
}
// Implements types.KVStore.
func (st *Store) ReverseIterator(start, end []byte) types.Iterator {
itr, err := st.store.ReverseIteratorAtVersion(st.storeKey.Name(), start, end, st.version)
if err != nil {
panic(err)
}
return itr
}
// Implements types.KVStore.
func (st *Store) Set(key, value []byte) {
panic("write operation is not supported")
}
// Implements types.KVStore.
func (st *Store) Delete(key []byte) {
panic("write operation is not supported")
}