bbfd9ce136
Using the same implementation of the Backend and SessionCommand classes in both schemarouter and readwritesplit will prevent duplication of code. This commit only splits the generic parts of the class to a Backend class which the schemarouter then extends. The session commands for both routers are similar so they require no special handling.
133 lines
3.4 KiB
C++
133 lines
3.4 KiB
C++
#pragma once
|
|
/*
|
|
* Copyright (c) 2016 MariaDB Corporation Ab
|
|
*
|
|
* Use of this software is governed by the Business Source License included
|
|
* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
|
|
*
|
|
* Change Date: 2020-01-01
|
|
*
|
|
* On the date above, in accordance with the Business Source License, use
|
|
* of this software will be governed by version 2 or later of the General
|
|
* Public License.
|
|
*/
|
|
|
|
/**
|
|
* @file schemarouter.hh - Common schemarouter definitions
|
|
*/
|
|
|
|
#define MXS_MODULE_NAME "schemarouter"
|
|
|
|
#include <maxscale/cdefs.h>
|
|
|
|
#include <limits>
|
|
#include <list>
|
|
#include <set>
|
|
#include <string>
|
|
#include <tr1/memory>
|
|
|
|
#include <maxscale/buffer.hh>
|
|
#include <maxscale/pcre2.h>
|
|
#include <maxscale/service.h>
|
|
#include <maxscale/backend.hh>
|
|
|
|
namespace schemarouter
|
|
{
|
|
/**
|
|
* Configuration values
|
|
*/
|
|
struct Config
|
|
{
|
|
double refresh_min_interval; /**< Minimum required interval between
|
|
* refreshes of databases */
|
|
bool refresh_databases; /**< Are databases refreshed when
|
|
* they are not found in the hashtable */
|
|
bool debug; /**< Enable verbose debug messages to clients */
|
|
pcre2_code* ignore_regex; /**< Regular expression used to ignore databases */
|
|
pcre2_match_data* ignore_match_data; /**< Match data for @c ignore_regex */
|
|
std::set<std::string> ignored_dbs; /**< Set of ignored databases */
|
|
|
|
Config():
|
|
refresh_min_interval(0.0),
|
|
refresh_databases(false),
|
|
debug(false),
|
|
ignore_regex(NULL),
|
|
ignore_match_data(NULL)
|
|
{
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Router statistics
|
|
*/
|
|
struct Stats
|
|
{
|
|
int n_queries; /*< Number of queries forwarded */
|
|
int n_sescmd; /*< Number of session commands */
|
|
int longest_sescmd; /*< Longest chain of stored session commands */
|
|
int n_hist_exceeded; /*< Number of sessions that exceeded session
|
|
* command history limit */
|
|
int sessions; /*< Number of sessions */
|
|
int shmap_cache_hit; /*< Shard map was found from the cache */
|
|
int shmap_cache_miss; /*< No shard map found from the cache */
|
|
double ses_longest; /*< Longest session */
|
|
double ses_shortest; /*< Shortest session */
|
|
double ses_average; /*< Average session length */
|
|
|
|
Stats():
|
|
n_queries(0),
|
|
n_sescmd(0),
|
|
longest_sescmd(0),
|
|
n_hist_exceeded(0),
|
|
sessions(0),
|
|
shmap_cache_hit(0),
|
|
shmap_cache_miss(0),
|
|
ses_longest(0.0),
|
|
ses_shortest(std::numeric_limits<double>::max()),
|
|
ses_average(0.0)
|
|
{
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Reference to a backend
|
|
*
|
|
* Owned by router client session.
|
|
*/
|
|
class SRBackend: public mxs::Backend
|
|
{
|
|
public:
|
|
|
|
SRBackend(SERVER_REF *ref):
|
|
mxs::Backend(ref),
|
|
m_mapped(false)
|
|
{
|
|
}
|
|
|
|
~SRBackend()
|
|
{
|
|
}
|
|
|
|
/**
|
|
* @brief Set the mapping state of the backend
|
|
*
|
|
* @param value Value to set
|
|
*/
|
|
void set_mapped(bool value);
|
|
|
|
/**
|
|
* @brief Check if the backend has been mapped
|
|
*
|
|
* @return True if the backend has been mapped
|
|
*/
|
|
bool is_mapped() const;
|
|
|
|
private:
|
|
bool m_mapped; /**< Whether the backend has been mapped */
|
|
};
|
|
|
|
typedef std::tr1::shared_ptr<SRBackend> SSRBackend;
|
|
typedef std::list<SSRBackend> SSRBackendList;
|
|
|
|
}
|