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Replace the approach using Foo_thread_args + Foo_thread and manually

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spawned threads with a reusable class Thread.

This is the second idea implemented in the Alik's patch for
BUG#22306: STOP INSTANCE can not be applied for instances in Crashed,
Failed and Abandoned.
Commiting separately to ease review process.
This commit is contained in:
kostja@bodhi.local
2006-11-17 16:11:04 +03:00
parent 2f69dfb28f
commit 7278f45bfd
13 changed files with 337 additions and 421 deletions
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63
server-tools/instance-manager/mysql_connection.h
View File

@ -16,33 +16,60 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include <my_global.h>
#include <my_pthread.h>
#include "thread_registry.h"
#include <mysql_com.h>
#if defined(__GNUC__) && defined(USE_PRAGMA_INTERFACE)
#pragma interface
#endif
pthread_handler_t mysql_connection(void *arg);
class Thread_registry;
class User_map;
class Instance_map;
struct st_vio;
class User_map;
struct Mysql_connection_thread_args
/*
MySQL connection - handle one connection with mysql command line client
See also comments in mysqlmanager.cc to picture general Instance Manager
architecture.
We use conventional technique to work with classes without exceptions:
class acquires all vital resource in init(); Thus if init() succeed,
a user must call cleanup(). All other methods are valid only between
init() and cleanup().
*/
class Mysql_connection: public Thread
{
struct st_vio *vio;
Thread_registry &thread_registry;
const User_map &user_map;
ulong connection_id;
Instance_map &instance_map;
public:
Mysql_connection(Thread_registry *thread_registry_arg,
User_map *user_map_arg,
struct st_vio *vio_arg,
ulong connection_id_arg);
virtual ~Mysql_connection();
Mysql_connection_thread_args(struct st_vio *vio_arg,
Thread_registry &thread_registry_arg,
const User_map &user_map_arg,
ulong connection_id_arg,
Instance_map &instance_map_arg);
protected:
virtual void run();
private:
struct st_vio *vio;
ulong connection_id;
Thread_info thread_info;
Thread_registry *thread_registry;
User_map *user_map;
NET net;
struct rand_struct rand_st;
char scramble[SCRAMBLE_LENGTH + 1];
uint status;
ulong client_capabilities;
private:
/* The main loop implementation triad */
int init();
void main();
void cleanup();
/* Names are conventionally the same as in mysqld */
int check_connection();
int do_command();
int dispatch_command(enum enum_server_command command,
const char *text, uint len);
};
#endif // INCLUDES_MYSQL_INSTANCE_MANAGER_MYSQL_CONNECTION_H