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storage: add comments about errors from MemoryStore

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It never returns errors for some operations and this knowledge can be used by
other code.
This commit is contained in:
Roman Khimov 2019-09-26 18:35:36 +03:00
parent 920d7c610c
commit 4a732d97ac
1 changed files with 4 additions and 3 deletions
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7
pkg/core/storage/memory_store.go
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@ -47,7 +47,7 @@ func (s *MemoryStore) Get(key []byte) ([]byte, error) {
return nil, ErrKeyNotFound return nil, ErrKeyNotFound
} }
// Put implements the Store interface. // Put implements the Store interface. Never returns an error.
func (s *MemoryStore) Put(key, value []byte) error { func (s *MemoryStore) Put(key, value []byte) error {
s.Lock() s.Lock()
s.mem[makeKey(key)] = value s.mem[makeKey(key)] = value
@ -55,7 +55,7 @@ func (s *MemoryStore) Put(key, value []byte) error {
return nil return nil
} }
// PutBatch implements the Store interface. // PutBatch implements the Store interface. Never returns an error.
func (s *MemoryStore) PutBatch(batch Batch) error { func (s *MemoryStore) PutBatch(batch Batch) error {
b := batch.(*MemoryBatch) b := batch.(*MemoryBatch)
for k, v := range b.m { for k, v := range b.m {
@ -105,7 +105,8 @@ func (s *MemoryStore) Persist(ps Store) (int, error) {
return keys, err return keys, err
} }
// Close implements Store interface and clears up memory. // Close implements Store interface and clears up memory. Never returns an
// error.
func (s *MemoryStore) Close() error { func (s *MemoryStore) Close() error {
s.Lock() s.Lock()
s.mem = nil s.mem = nil