103 lines
3.4 KiB
C
103 lines
3.4 KiB
C
#ifndef _SERVICE_H
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#define _SERVICE_H
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/*
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* This file is distributed as part of the SkySQL Gateway. It is free
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* software: you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation,
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* version 2.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Copyright SkySQL Ab 2013
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*/
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#include <time.h>
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#include <spinlock.h>
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#include <dcb.h>
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#include <server.h>
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/**
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* @file service.h
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*
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* The service level definitions within the gateway
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*
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* @verbatim
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* Revision History
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*
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* Date Who Description
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* 14/06/13 Mark Riddoch Initial implementation
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* 18/06/13 Mark Riddoch Addition of statistics and function
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* prototypes
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*
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* @endverbatim
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*/
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struct server;
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struct router;
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struct router_object;
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/**
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* The servprotocol structure is used to link a service to the protocols that
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* are used to support that service. It defines the name of the protocol module
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* that should be loaded to support the client connection and the port that the
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* protocol should use to listen for incoming client connections.
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*/
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typedef struct servprotocol {
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char *protocol; /**< Protocol module to load */
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unsigned short port; /**< Port to listen on */
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DCB *listener; /**< The DCB for the listener */
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struct servprotocol
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*next; /**< Next service protocol */
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} SERV_PROTOCOL;
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/**
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* The service statistics structure
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*/
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typedef struct {
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time_t started; /**< The time when the service was started */
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int n_sessions; /**< Number of sessions created on service since start */
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int n_current; /**< Current number of sessions */
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} SERVICE_STATS;
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/**
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* Defines a service within the gateway.
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*
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* A service is a combination of a set of backend servers, a routing mechanism
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* and a set of client side protocol/port pairs used to listen for new connections
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* to the service.
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*/
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typedef struct service {
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char *name; /**< The service name */
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int state; /**< The service state */
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SERV_PROTOCOL *ports; /**< Linked list of ports and protocols
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* that this service will listen on.
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*/
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char *routerModule; /**< Name of router module to use */
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struct router_object
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*router; /**< The router we are using */
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void *router_instance;
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/**< The router instance for this service */
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struct server *databases; /**< The set of servers in the backend */
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SPINLOCK spin; /**< The service spinlock */
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SERVICE_STATS stats; /**< The service statistics */
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struct service *next; /**< The next service in the linked list */
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} SERVICE;
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#define SERVICE_STATE_ALLOC 1 /**< The service has been allocated */
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#define SERVICE_STATE_STARTED 2 /**< The service has been started */
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extern SERVICE *service_alloc(char *, char *);
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extern int service_free(SERVICE *);
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extern int serviceAddProtocol(SERVICE *, char *, unsigned short);
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extern void serviceAddBackend(SERVICE *, SERVER *);
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extern int serviceStart(SERVICE *);
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extern void printService(SERVICE *);
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extern void printAllServices();
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extern void dprintAllServices(DCB *);
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#endif
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