pipeline.h

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#pragma once
 
/*
 *   This program is is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or (at
 *   your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */
 
/**
 * $Id: c7ea3b0460ce9b5043859bdcd3fd7becda4cc42a $
 * @file lib/redis/pipeline.h
 * @brief Redis asynchronous command pipelining
 *
 * @copyright 2019 The FreeRADIUS server project
 * @copyright 2019 Network RADIUS SAS (legal@networkradius.com)
 *
 * @author Arran Cudbard-Bell (a.cudbardb@freeradius.org)
 */
RCSIDH(redis_pipeline_h, "$Id: c7ea3b0460ce9b5043859bdcd3fd7becda4cc42a $")
 
#include <freeradius-devel/server/connection.h>
#include <freeradius-devel/server/request.h>
#include <freeradius-devel/server/trunk.h>
#include <freeradius-devel/redis/io.h>
#include <hiredis/async.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef enum {
        FR_REDIS_PIPELINE_OK    = 0,                    //!< No failure.
        FR_REDIS_PIPELINE_BAD_CMDS,                     //!< Malformed command set.
        FR_REDIS_PIPELINE_DST_UNAVAILABLE,              //!< Cluster or host is down.
        FR_REDIS_PIPELINE_TOO_MANY_REDIRECTS,           //!< Redirected too many times.
        FR_REDIS_PIPELINE_FAIL                          //!< Generic failure.
} fr_redis_pipeline_status_t;
 
typedef struct fr_redis_cluster_thread_s fr_redis_cluster_thread_t;
typedef struct fr_redis_command_s fr_redis_command_t;
typedef struct fr_redis_command_set_s fr_redis_command_set_t;
typedef struct fr_redis_trunk_s fr_redis_trunk_t;
 
/** Do something meaningful with the replies to the commands previously issued
 *
 * Should mark the request as runnable, if there's a request.
 */
typedef void (*fr_redis_command_set_complete_t)(request_t *request, fr_dlist_head_t *completed, void *rctx);
 
/** Write a failure result to the rctx so that the module is aware that the request failed
 *
 * Should mark the request as runnable, if there's a request.
 */
typedef void (*fr_redis_command_set_fail_t)(request_t *request, fr_dlist_head_t *completed, void *rctx);
 
fr_redis_pipeline_status_t      fr_redis_command_preformatted_add(fr_redis_command_set_t *cmds,
                                                                  char const *cmd_str, size_t cmd_len);
 
/*
 *      TEMPORARY
 */
fr_redis_pipeline_status_t redis_command_set_enqueue(fr_redis_trunk_t *rtrunk, fr_redis_command_set_t *cmds);
 
redisReply *fr_redis_command_get_result(fr_redis_command_t *cmd);
 
fr_redis_command_set_t          *fr_redis_command_set_alloc(TALLOC_CTX *ctx,
                                                            request_t *request,
                                                            fr_redis_command_set_complete_t complete,
                                                            fr_redis_command_set_fail_t fail,
                                                            void *rctx);
 
fr_redis_trunk_t                *fr_redis_trunk_alloc(fr_redis_cluster_thread_t *rtcluster,
                                                      fr_redis_io_conf_t const *conf);
 
fr_redis_cluster_thread_t       *fr_redis_cluster_thread_alloc(TALLOC_CTX *ctx, fr_event_list_t *el,
                                                               fr_trunk_conf_t const *tconf);
 
#ifdef __cplusplus
}
#endif