Merge pull request #499 from cosmos/feature/get-commit-kv-store

REVIEW: Add GetCommitKVStore and CommitKVStore

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Changelog
 
+## 0.11.0 (TBD)
+
+BREAKING CHANGES
+
+* [examples] dummy -> kvstore
+* [types] CommitMultiStore interface has new `GetCommitKVStore(key StoreKey) CommitKVStore` method
+
 ## 0.10.0 (February 20, 2017)
 
 BREAKING CHANGES

store/rootmultistore.go

@@ -67,6 +67,11 @@ func (rs *rootMultiStore) GetCommitStore(key StoreKey) CommitStore {
 	return rs.stores[key]
 }
 
+// Implements CommitMultiStore.
+func (rs *rootMultiStore) GetCommitKVStore(key StoreKey) CommitKVStore {
+	return rs.stores[key].(CommitKVStore)
+}
+
 // Implements CommitMultiStore.
 func (rs *rootMultiStore) LoadLatestVersion() error {
 	ver := getLatestVersion(rs.db)

store/types.go

@@ -6,14 +6,15 @@ import (
 
 // Import cosmos-sdk/types/store.go for convenience.
 type Store = types.Store
+type Committer = types.Committer
+type CommitStore = types.CommitStore
 type MultiStore = types.MultiStore
 type CacheMultiStore = types.CacheMultiStore
-type CommitStore = types.CommitStore
-type Committer = types.Committer
 type CommitMultiStore = types.CommitMultiStore
 type KVStore = types.KVStore
 type Iterator = types.Iterator
 type CacheKVStore = types.CacheKVStore
+type CommitKVStore = types.CommitKVStore
 type CacheWrapper = types.CacheWrapper
 type CacheWrap = types.CacheWrap
 type CommitID = types.CommitID

types/store.go

@@ -68,6 +68,9 @@ type CommitMultiStore interface {
 	// Panics on a nil key.
 	GetCommitStore(key StoreKey) CommitStore
 
+	// Panics on a nil key.
+	GetCommitKVStore(key StoreKey) CommitKVStore
+
 	// Load the latest persisted version.  Called once after all
 	// calls to Mount*Store() are complete.
 	LoadLatestVersion() error
@@ -129,6 +132,12 @@ type CacheKVStore interface {
 	Write()
 }
 
+// Stores of MultiStore must implement CommitStore.
+type CommitKVStore interface {
+	Committer
+	KVStore
+}
+
 //----------------------------------------
 // CacheWrap