130 lines
2.4 KiB
C++
130 lines
2.4 KiB
C++
#ifndef MUDUO_EXAMPLES_MEMCACHED_SERVER_ITEM_H
|
|
#define MUDUO_EXAMPLES_MEMCACHED_SERVER_ITEM_H
|
|
|
|
#include "muduo/base/Atomic.h"
|
|
#include "muduo/base/StringPiece.h"
|
|
#include "muduo/base/Types.h"
|
|
|
|
#include <memory>
|
|
|
|
namespace muduo
|
|
{
|
|
namespace net
|
|
{
|
|
class Buffer;
|
|
}
|
|
}
|
|
|
|
class Item;
|
|
typedef std::shared_ptr<Item> ItemPtr; // TODO: use unique_ptr
|
|
typedef std::shared_ptr<const Item> ConstItemPtr; // TODO: use unique_ptr
|
|
|
|
// Item is immutable once added into hash table
|
|
class Item : muduo::noncopyable
|
|
{
|
|
public:
|
|
enum UpdatePolicy
|
|
{
|
|
kInvalid,
|
|
kSet,
|
|
kAdd,
|
|
kReplace,
|
|
kAppend,
|
|
kPrepend,
|
|
kCas,
|
|
};
|
|
|
|
static ItemPtr makeItem(muduo::StringPiece keyArg,
|
|
uint32_t flagsArg,
|
|
int exptimeArg,
|
|
int valuelen,
|
|
uint64_t casArg)
|
|
{
|
|
return std::make_shared<Item>(keyArg, flagsArg, exptimeArg, valuelen, casArg);
|
|
//return ItemPtr(new Item(keyArg, flagsArg, exptimeArg, valuelen, casArg));
|
|
}
|
|
|
|
Item(muduo::StringPiece keyArg,
|
|
uint32_t flagsArg,
|
|
int exptimeArg,
|
|
int valuelen,
|
|
uint64_t casArg);
|
|
|
|
~Item()
|
|
{
|
|
::free(data_);
|
|
}
|
|
|
|
muduo::StringPiece key() const
|
|
{
|
|
return muduo::StringPiece(data_, keylen_);
|
|
}
|
|
|
|
uint32_t flags() const
|
|
{
|
|
return flags_;
|
|
}
|
|
|
|
int rel_exptime() const
|
|
{
|
|
return rel_exptime_;
|
|
}
|
|
|
|
const char* value() const
|
|
{
|
|
return data_+keylen_;
|
|
}
|
|
|
|
size_t valueLength() const
|
|
{
|
|
return valuelen_;
|
|
}
|
|
|
|
uint64_t cas() const
|
|
{
|
|
return cas_;
|
|
}
|
|
|
|
size_t hash() const
|
|
{
|
|
return hash_;
|
|
}
|
|
|
|
void setCas(uint64_t casArg)
|
|
{
|
|
cas_ = casArg;
|
|
}
|
|
|
|
size_t neededBytes() const
|
|
{
|
|
return totalLen() - receivedBytes_;
|
|
}
|
|
|
|
void append(const char* data, size_t len);
|
|
|
|
bool endsWithCRLF() const
|
|
{
|
|
return receivedBytes_ == totalLen()
|
|
&& data_[totalLen()-2] == '\r'
|
|
&& data_[totalLen()-1] == '\n';
|
|
}
|
|
|
|
void output(muduo::net::Buffer* out, bool needCas = false) const;
|
|
|
|
void resetKey(muduo::StringPiece k);
|
|
|
|
private:
|
|
int totalLen() const { return keylen_ + valuelen_; }
|
|
|
|
int keylen_;
|
|
const uint32_t flags_;
|
|
const int rel_exptime_;
|
|
const int valuelen_;
|
|
int receivedBytes_; // FIXME: remove this member
|
|
uint64_t cas_;
|
|
size_t hash_;
|
|
char* data_;
|
|
};
|
|
|
|
#endif // MUDUO_EXAMPLES_MEMCACHED_SERVER_ITEM_H
|