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/*
* librdkafka - Apache Kafka C library
*
* Copyright (c) 2019 Magnus Edenhill
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _RDKAFKA_COORD_H_
#define _RDKAFKA_COORD_H_
typedef TAILQ_HEAD(rd_kafka_coord_cache_head_s,
rd_kafka_coord_cache_entry_s) rd_kafka_coord_cache_head_t;
/**
* @brief Coordinator cache entry
*/
typedef struct rd_kafka_coord_cache_entry_s {
TAILQ_ENTRY(rd_kafka_coord_cache_entry_s) cce_link;
rd_kafka_coordtype_t cce_coordtype; /**< Coordinator type */
char *cce_coordkey; /**< Coordinator type key,
* e.g the group id */
rd_ts_t cce_ts_used; /**< Last used timestamp */
rd_kafka_broker_t *cce_rkb; /**< The cached coordinator */
} rd_kafka_coord_cache_entry_t;
/**
* @brief Coordinator cache
*/
typedef struct rd_kafka_coord_cache_s {
rd_kafka_coord_cache_head_t cc_entries; /**< Cache entries */
int cc_cnt; /**< Number of entries */
rd_ts_t cc_expire_thres; /**< Entries not used in
* this long will be
* expired */
} rd_kafka_coord_cache_t;
void rd_kafka_coord_cache_expire(rd_kafka_coord_cache_t *cc);
void rd_kafka_coord_cache_evict(rd_kafka_coord_cache_t *cc,
rd_kafka_broker_t *rkb);
void rd_kafka_coord_cache_destroy(rd_kafka_coord_cache_t *cc);
void rd_kafka_coord_cache_init(rd_kafka_coord_cache_t *cc, int expire_thres_ms);
/**
* @name Coordinator requests
*/
/**
* @brief Request to be sent to coordinator.
* Includes looking up, caching, and connecting to, the coordinator.
*/
typedef struct rd_kafka_coord_req_s {
TAILQ_ENTRY(rd_kafka_coord_req_s) creq_link; /**< rk_coord_reqs */
rd_kafka_coordtype_t creq_coordtype; /**< Coordinator type */
char *creq_coordkey; /**< Coordinator key */
rd_kafka_op_t *creq_rko; /**< Requester's rko that is
* provided to creq_send_req_cb
* (optional). */
rd_kafka_timer_t creq_tmr; /**< Delay timer. */
rd_ts_t creq_ts_timeout; /**< Absolute timeout.
* Will fail with an error
* code pertaining to the
* current state */
rd_interval_t creq_query_intvl; /**< Coord query interval (1s) */
rd_kafka_send_req_cb_t *creq_send_req_cb; /**< Sender callback */
rd_kafka_replyq_t creq_replyq; /**< Reply queue */
rd_kafka_resp_cb_t *creq_resp_cb; /**< Reply queue response
* parsing callback for the
* request sent by
* send_req_cb */
void *creq_reply_opaque; /**< Opaque passed to
* creq_send_req_cb and
* creq_resp_cb. */
int creq_refcnt; /**< Internal reply queue for
* FindCoordinator requests
* which is forwarded to the
* rk_ops queue, but allows
* destroying the creq even
* with outstanding
* FindCoordinator requests. */
rd_bool_t creq_done; /**< True if request was sent */
rd_kafka_broker_t *creq_rkb; /**< creq is waiting for this broker to
* come up. */
} rd_kafka_coord_req_t;
void rd_kafka_coord_req(rd_kafka_t *rk,
rd_kafka_coordtype_t coordtype,
const char *coordkey,
rd_kafka_send_req_cb_t *send_req_cb,
rd_kafka_op_t *rko,
int delay_ms,
int timeout_ms,
rd_kafka_replyq_t replyq,
rd_kafka_resp_cb_t *resp_cb,
void *reply_opaque);
void rd_kafka_coord_rkb_monitor_cb(rd_kafka_broker_t *rkb);
void rd_kafka_coord_reqs_term(rd_kafka_t *rk);
void rd_kafka_coord_reqs_init(rd_kafka_t *rk);
#endif /* _RDKAFKA_COORD_H_ */
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