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refactoring: use interface

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This commit is contained in:
Chris Lu 2020-08-17 20:20:08 -07:00
parent be4d42b8e2
commit 09e126bae5
2 changed files with 8 additions and 3 deletions
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6
weed/filer2/reader_at.go
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@ -19,7 +19,7 @@ type ChunkReadAt struct {
readerLock sync.Mutex
fileSize int64
chunkCache *chunk_cache.TieredChunkCache
chunkCache chunk_cache.ChunkCache
}
// var _ = io.ReaderAt(&ChunkReadAt{})
@ -53,7 +53,7 @@ func LookupFn(filerClient filer_pb.FilerClient) LookupFileIdFunctionType {
}
}
func NewChunkReaderAtFromClient(filerClient filer_pb.FilerClient, chunkViews []*ChunkView, chunkCache *chunk_cache.TieredChunkCache, fileSize int64) *ChunkReadAt {
func NewChunkReaderAtFromClient(filerClient filer_pb.FilerClient, chunkViews []*ChunkView, chunkCache chunk_cache.ChunkCache, fileSize int64) *ChunkReadAt {
return &ChunkReadAt{
chunkViews: chunkViews,
@ -103,7 +103,7 @@ func (c *ChunkReadAt) doReadAt(p []byte, offset int64) (n int, err error) {
bufferOffset := chunkStart - chunk.LogicOffset + chunk.Offset
copied := copy(p[chunkStart-startOffset:chunkStop-startOffset], buffer[bufferOffset:bufferOffset+chunkStop-chunkStart])
n += copied
startOffset, remaining = startOffset + int64(copied), remaining-int64(copied)
startOffset, remaining = startOffset+int64(copied), remaining-int64(copied)
}
glog.V(4).Infof("doReadAt [%d,%d), n:%v, err:%v", offset, offset+int64(len(p)), n, err)

5
weed/util/chunk_cache/chunk_cache.go
View file

@ -13,6 +13,11 @@ const (
onDiskCacheSizeLimit1 = 4 * memCacheSizeLimit
)
type ChunkCache interface {
GetChunk(fileId string, minSize uint64) (data []byte)
SetChunk(fileId string, data []byte)
}
// a global cache for recently accessed file chunks
type TieredChunkCache struct {
memCache *ChunkCacheInMemory