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// vim:sw=2:ai
/*
* Copyright (C) 2010 DeNA Co.,Ltd.. All rights reserved.
* See COPYRIGHT.txt for details.
*/
#ifndef DENA_DATABASE_HPP
#define DENA_DATABASE_HPP
#include <string>
#include <memory>
#include <vector>
#include <stdint.h>
#include "string_buffer.hpp"
#include "string_ref.hpp"
#include "config.hpp"
namespace dena {
struct database_i;
typedef std::auto_ptr<volatile database_i> database_ptr;
struct dbcontext_i;
typedef std::auto_ptr<dbcontext_i> dbcontext_ptr;
struct database_i {
virtual ~database_i() { }
virtual dbcontext_ptr create_context(bool for_write) volatile = 0;
virtual void stop() volatile = 0;
virtual const config& get_conf() const volatile = 0;
static database_ptr create(const config& conf);
};
struct prep_stmt {
typedef std::vector<uint32_t> fields_type;
private:
dbcontext_i *dbctx; /* must be valid while *this is alive */
size_t table_id; /* a prep_stmt object holds a refcount of the table */
size_t idxnum;
fields_type ret_fields;
fields_type filter_fields;
public:
prep_stmt();
prep_stmt(dbcontext_i *c, size_t tbl, size_t idx, const fields_type& rf,
const fields_type& ff);
~prep_stmt();
prep_stmt(const prep_stmt& x);
prep_stmt& operator =(const prep_stmt& x);
public:
size_t get_table_id() const { return table_id; }
size_t get_idxnum() const { return idxnum; }
const fields_type& get_ret_fields() const { return ret_fields; }
const fields_type& get_filter_fields() const { return filter_fields; }
};
struct dbcallback_i {
virtual ~dbcallback_i () { }
virtual void dbcb_set_prep_stmt(size_t pst_id, const prep_stmt& v) = 0;
virtual const prep_stmt *dbcb_get_prep_stmt(size_t pst_id) const = 0;
virtual void dbcb_resp_short(uint32_t code, const char *msg) = 0;
virtual void dbcb_resp_short_num(uint32_t code, uint32_t value) = 0;
virtual void dbcb_resp_short_num64(uint32_t code, uint64_t value) = 0;
virtual void dbcb_resp_begin(size_t num_flds) = 0;
virtual void dbcb_resp_entry(const char *fld, size_t fldlen) = 0;
virtual void dbcb_resp_end() = 0;
virtual void dbcb_resp_cancel() = 0;
};
enum record_filter_type {
record_filter_type_skip = 0,
record_filter_type_break = 1,
};
struct record_filter {
record_filter_type filter_type;
string_ref op;
uint32_t ff_offset; /* offset in filter_fields */
string_ref val;
record_filter() : filter_type(record_filter_type_skip), ff_offset(0) { }
};
struct cmd_open_args {
size_t pst_id;
const char *dbn;
const char *tbl;
const char *idx;
const char *retflds;
const char *filflds;
cmd_open_args() : pst_id(0), dbn(0), tbl(0), idx(0), retflds(0),
filflds(0) { }
};
struct cmd_exec_args {
const prep_stmt *pst;
string_ref op;
const string_ref *kvals;
size_t kvalslen;
uint32_t limit;
uint32_t skip;
string_ref mod_op;
const string_ref *uvals; /* size must be pst->retfieelds.size() */
const record_filter *filters;
int invalues_keypart;
const string_ref *invalues;
size_t invalueslen;
cmd_exec_args() : pst(0), kvals(0), kvalslen(0), limit(0), skip(0),
uvals(0), filters(0), invalues_keypart(-1), invalues(0), invalueslen(0) { }
};
struct dbcontext_i {
virtual ~dbcontext_i() { }
virtual void init_thread(const void *stack_bottom,
volatile int& shutdown_flag) = 0;
virtual void term_thread() = 0;
virtual bool check_alive() = 0;
virtual void lock_tables_if() = 0;
virtual void unlock_tables_if() = 0;
virtual bool get_commit_error() = 0;
virtual void clear_error() = 0;
virtual void close_tables_if() = 0;
virtual void table_addref(size_t tbl_id) = 0; /* TODO: hide */
virtual void table_release(size_t tbl_id) = 0; /* TODO: hide */
virtual void cmd_open(dbcallback_i& cb, const cmd_open_args& args) = 0;
virtual void cmd_exec(dbcallback_i& cb, const cmd_exec_args& args) = 0;
virtual void set_statistics(size_t num_conns, size_t num_active) = 0;
};
};
extern unsigned long long int open_tables_count;
extern unsigned long long int close_tables_count;
extern unsigned long long int lock_tables_count;
extern unsigned long long int unlock_tables_count;
#if 0
extern unsigned long long int index_exec_count;
#endif
#endif
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