60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
|
#ifndef MADFS_READ_CACHE_CLIENT_H
|
||
|
|
#define MADFS_READ_CACHE_CLIENT_H
|
||
|
|
|
||
|
|
#include <folly/futures/Future.h>
|
||
|
|
#include <folly/futures/Promise.h>
|
||
|
|
#include <folly/executors/CPUThreadPoolExecutor.h>
|
||
|
|
|
||
|
|
#include "Common.h"
|
||
|
|
#include "Placement.h"
|
||
|
|
#include "data_adaptor.h"
|
||
|
|
|
||
|
|
using HybridCache::ByteBuffer;
|
||
|
|
|
||
|
|
class GlobalDataAdaptor;
|
||
|
|
|
||
|
|
class ReadCacheClient {
|
||
|
|
friend class GetChunkContext;
|
||
|
|
|
||
|
|
public:
|
||
|
|
ReadCacheClient(GlobalDataAdaptor *parent);
|
||
|
|
|
||
|
|
~ReadCacheClient();
|
||
|
|
|
||
|
|
virtual folly::Future<int> Get(const std::string &key,
|
||
|
|
size_t start,
|
||
|
|
size_t size,
|
||
|
|
ByteBuffer &buffer);
|
||
|
|
|
||
|
|
virtual folly::Future<int> Invalidate(const std::string &key, size_t size);
|
||
|
|
|
||
|
|
// for testing only
|
||
|
|
public:
|
||
|
|
struct GetChunkRequestV2 {
|
||
|
|
std::string user_key;
|
||
|
|
std::string internal_key;
|
||
|
|
size_t chunk_id;
|
||
|
|
size_t chunk_start;
|
||
|
|
size_t chunk_len;
|
||
|
|
size_t chunk_granularity;
|
||
|
|
ByteBuffer buffer;
|
||
|
|
};
|
||
|
|
|
||
|
|
static void GenerateGetChunkRequestsV2(const std::string &key,
|
||
|
|
size_t start,
|
||
|
|
size_t size,
|
||
|
|
ByteBuffer &buffer,
|
||
|
|
std::vector<GetChunkRequestV2> &requests,
|
||
|
|
size_t chunk_size);
|
||
|
|
|
||
|
|
folly::Future<int> GetChunkAsync(int server_id, GetChunkRequestV2 context);
|
||
|
|
|
||
|
|
folly::Future<int> GetChunkFromGlobalCache(int server_id, GetChunkRequestV2 context);
|
||
|
|
|
||
|
|
std::vector<int> GetReplica(const std::string &key, int num_choose);
|
||
|
|
|
||
|
|
private:
|
||
|
|
GlobalDataAdaptor *parent_;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // MADFS_READ_CACHE_CLIENT_H
|