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rdkafka.c
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/*
* librdkafka - Apache Kafka C library
*
* Copyright (c) 2012-2013, 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.
*/
#define _GNU_SOURCE
#include <errno.h>
#include <string.h>
#include <stdarg.h>
#include <syslog.h>
#include <pthread.h>
#include "rdkafka_int.h"
#include "rdkafka_msg.h"
#include "rdkafka_broker.h"
#include "rdkafka_topic.h"
#include "rdkafka_offset.h"
#include "rdtime.h"
static pthread_once_t rd_kafka_global_init_once = PTHREAD_ONCE_INIT;
/**
* Current number of threads created by rdkafka.
* This is used in regression tests.
*/
int rd_kafka_thread_cnt_curr = 0;
int rd_kafka_thread_cnt (void) {
return rd_kafka_thread_cnt_curr;
}
/**
* Current number of live rd_kafka_t handles.
* This is used by rd_kafka_wait_destroyed() to know when the library
* has fully cleaned up after itself.
*/
static int rd_kafka_handle_cnt_curr = 0; /* atomic */
/**
* Wait for all rd_kafka_t objects to be destroyed.
* Returns 0 if all kafka objects are now destroyed, or -1 if the
* timeout was reached.
*/
int rd_kafka_wait_destroyed (int timeout_ms) {
rd_ts_t timeout = rd_clock() + (timeout_ms * 1000);
while (rd_kafka_thread_cnt() > 0 ||
rd_kafka_handle_cnt_curr > 0) {
if (rd_clock() >= timeout) {
errno = ETIMEDOUT;
return -1;
}
usleep(25000); /* 25ms */
}
return 0;
}
/**
* Wrapper for pthread_cond_timedwait() that makes it simpler to use
* for delta timeouts.
* `timeout_ms' is the delta timeout in milliseconds.
*/
int pthread_cond_timedwait_ms (pthread_cond_t *cond,
pthread_mutex_t *mutex,
int timeout_ms) {
struct timeval tv;
struct timespec ts;
gettimeofday(&tv, NULL);
TIMEVAL_TO_TIMESPEC(&tv, &ts);
ts.tv_sec += timeout_ms / 1000;
ts.tv_nsec += (timeout_ms % 1000) * 1000000;
if (ts.tv_nsec > 1000000000) {
ts.tv_sec++;
ts.tv_nsec -= 1000000000;
}
return pthread_cond_timedwait(cond, mutex, &ts);
}
void rd_kafka_log_buf (const rd_kafka_t *rk, int level,
const char *fac, const char *buf) {
if (!rk->rk_log_cb || level > rk->rk_log_level)
return;
rk->rk_log_cb(rk, level, fac, buf);
}
void rd_kafka_log0 (const rd_kafka_t *rk, const char *extra, int level,
const char *fac, const char *fmt, ...) {
char buf[2048];
va_list ap;
int elen = 0;
if (!rk->rk_log_cb || level > rk->rk_log_level)
return;
if (extra) {
elen = snprintf(buf, sizeof(buf), "%s: ", extra);
if (unlikely(elen >= sizeof(buf)))
elen = sizeof(buf);
}
va_start(ap, fmt);
vsnprintf(buf+elen, sizeof(buf)-elen, fmt, ap);
va_end(ap);
rk->rk_log_cb(rk, level, fac, buf);
}
void rd_kafka_log_print (const rd_kafka_t *rk, int level,
const char *fac, const char *buf) {
struct timeval tv;
gettimeofday(&tv, NULL);
fprintf(stderr, "%%%i|%u.%03u|%s|%s| %s\n",
level, (int)tv.tv_sec, (int)(tv.tv_usec / 1000),
fac, rk ? rk->rk_name : "", buf);
}
void rd_kafka_log_syslog (const rd_kafka_t *rk, int level,
const char *fac, const char *buf) {
static int initialized = 0;
if (!initialized)
openlog("rdkafka", LOG_PID|LOG_CONS, LOG_USER);
syslog(level, "%s: %s: %s", fac, rk ? rk->rk_name : "", buf);
}
void rd_kafka_set_logger (rd_kafka_t *rk,
void (*func) (const rd_kafka_t *rk, int level,
const char *fac, const char *buf)) {
rk->rk_log_cb = func;
}
void rd_kafka_set_log_level (rd_kafka_t *rk, int level) {
rk->rk_log_level = level;
}
rd_kafka_op_t *rd_kafka_op_new (rd_kafka_op_type_t type) {
rd_kafka_op_t *rko;
rko = calloc(1, sizeof(*rko));
rko->rko_type = type;
return rko;
}
void rd_kafka_op_destroy (rd_kafka_op_t *rko) {
/* Decrease refcount on rkbuf to eventually free the shared buffer */
if (rko->rko_rkbuf)
rd_kafka_buf_destroy(rko->rko_rkbuf);
else if (rko->rko_payload && rko->rko_flags & RD_KAFKA_OP_F_FREE)
free(rko->rko_payload);
free(rko);
}
/**
* Destroy a queue. The queue must be empty.
*/
void rd_kafka_q_destroy (rd_kafka_q_t *rkq) {
assert(TAILQ_EMPTY(&rkq->rkq_q));
pthread_mutex_destroy(&rkq->rkq_lock);
pthread_cond_destroy(&rkq->rkq_cond);
}
/**
* Initialize a queue.
*/
void rd_kafka_q_init (rd_kafka_q_t *rkq) {
TAILQ_INIT(&rkq->rkq_q);
rkq->rkq_qlen = 0;
pthread_mutex_init(&rkq->rkq_lock, NULL);
pthread_cond_init(&rkq->rkq_cond, NULL);
}
/**
* Purge all entries from a queue.
*/
void rd_kafka_q_purge (rd_kafka_q_t *rkq) {
rd_kafka_op_t *rko, *next;
pthread_mutex_lock(&rkq->rkq_lock);
next = TAILQ_FIRST(&rkq->rkq_q);
while ((rko = next)) {
next = TAILQ_NEXT(next, rko_link);
rd_kafka_op_destroy(rko);
}
TAILQ_INIT(&rkq->rkq_q);
(void)rd_atomic_set(&rkq->rkq_qlen, 0);
pthread_mutex_unlock(&rkq->rkq_lock);
}
/**
* Move 'cnt' entries from 'srcq' to 'dstq'.
* Returns the number of entries moved.
*/
size_t rd_kafka_q_move_cnt (rd_kafka_q_t *dstq, rd_kafka_q_t *srcq,
size_t cnt) {
rd_kafka_op_t *rko;
size_t mcnt = 0;
pthread_mutex_lock(&srcq->rkq_lock);
pthread_mutex_lock(&dstq->rkq_lock);
/* Optimization, if 'cnt' is equal/larger than all items of 'srcq'
* we can move the entire queue. */
if (cnt >= srcq->rkq_qlen) {
mcnt = srcq->rkq_qlen;
TAILQ_CONCAT(&dstq->rkq_q, &srcq->rkq_q, rko_link);
TAILQ_INIT(&srcq->rkq_q);
(void)rd_atomic_set(&srcq->rkq_qlen, 0);
(void)rd_atomic_add(&dstq->rkq_qlen, mcnt);
} else {
while (mcnt < cnt && (rko = TAILQ_FIRST(&srcq->rkq_q))) {
TAILQ_REMOVE(&srcq->rkq_q, rko, rko_link);
TAILQ_INSERT_TAIL(&dstq->rkq_q, rko, rko_link);
(void)rd_atomic_sub(&dstq->rkq_qlen, 1);
(void)rd_atomic_add(&dstq->rkq_qlen, 1);
mcnt++;
}
}
pthread_mutex_unlock(&dstq->rkq_lock);
pthread_mutex_unlock(&srcq->rkq_lock);
return mcnt;
}
/**
* Pop an op from a queue.
*
* Locality: any thread.
*/
rd_kafka_op_t *rd_kafka_q_pop (rd_kafka_q_t *rkq, int timeout_ms) {
rd_kafka_op_t *rko;
pthread_mutex_lock(&rkq->rkq_lock);
while (!(rko = TAILQ_FIRST(&rkq->rkq_q)) &&
timeout_ms != RD_POLL_NOWAIT) {
if (timeout_ms != RD_POLL_INFINITE) {
if (pthread_cond_timedwait_ms(&rkq->rkq_cond,
&rkq->rkq_lock,
timeout_ms) ==
ETIMEDOUT) {
pthread_mutex_unlock(&rkq->rkq_lock);
return NULL;
}
timeout_ms = 0;
} else
pthread_cond_wait(&rkq->rkq_cond, &rkq->rkq_lock);
}
if (rko) {
TAILQ_REMOVE(&rkq->rkq_q, rko, rko_link);
(void)rd_atomic_sub(&rkq->rkq_qlen, 1);
}
pthread_mutex_unlock(&rkq->rkq_lock);
return rko;
}
/**
* Pop all available ops from a queue and call the provided
* callback for each op.
*
* Returns the number of ops served.
*
* Locality: any thread.
*/
int rd_kafka_q_serve (rd_kafka_t *rk,
rd_kafka_q_t *rkq, int timeout_ms,
void (*callback) (rd_kafka_op_t *rko,
void *opaque),
void *opaque) {
rd_kafka_op_t *rko, *tmp;
rd_kafka_q_t localq;
TAILQ_INIT(&localq.rkq_q);
pthread_mutex_lock(&rkq->rkq_lock);
/* Wait for op */
while (!(rko = TAILQ_FIRST(&rkq->rkq_q)) && timeout_ms != 0) {
if (timeout_ms != RD_POLL_INFINITE) {
if (pthread_cond_timedwait_ms(&rkq->rkq_cond,
&rkq->rkq_lock,
timeout_ms) ==
ETIMEDOUT)
break;
timeout_ms = 0;
} else
pthread_cond_wait(&rkq->rkq_cond,
&rkq->rkq_lock);
}
if (!rko) {
pthread_mutex_unlock(&rkq->rkq_lock);
return 0;
}
/* Move all ops to local queue */
TAILQ_CONCAT(&localq.rkq_q, &rkq->rkq_q, rko_link);
localq.rkq_qlen = rkq->rkq_qlen;
/* Reset real queue */
TAILQ_INIT(&rkq->rkq_q);
(void)rd_atomic_set(&rkq->rkq_qlen, 0);
pthread_mutex_unlock(&rkq->rkq_lock);
rd_kafka_dbg(rk, QUEUE, "QSERVE", "Serving %i ops", localq.rkq_qlen);
/* Call callback for each op */
TAILQ_FOREACH_SAFE(rko, &localq.rkq_q, rko_link, tmp) {
callback(rko, opaque);
rd_kafka_op_destroy(rko);
}
return localq.rkq_qlen;
}
/**
* Send an op back to the application.
*
* Locality: Kafka threads
*/
void rd_kafka_op_reply0 (rd_kafka_t *rk, rd_kafka_op_t *rko,
rd_kafka_op_type_t type,
rd_kafka_resp_err_t err,
void *payload, int len) {
rko->rko_type = type;
rko->rko_flags |= RD_KAFKA_OP_F_FREE;
rko->rko_payload = payload;
rko->rko_len = len;
rko->rko_err = err;
}
/**
* Send an op back to the application.
*
* Locality: Kafka thread
*/
void rd_kafka_op_reply (rd_kafka_t *rk,
rd_kafka_op_type_t type,
rd_kafka_resp_err_t err,
void *payload, int len) {
rd_kafka_op_t *rko;
rko = calloc(1, sizeof(*rko));
if (err && !payload) {
/* Provide human readable error string if not provided. */
/* Provide more info for some errors. */
if (err == RD_KAFKA_RESP_ERR_OFFSET_OUT_OF_RANGE) {
char tmp[512];
snprintf(tmp, sizeof(tmp), "%s (%"PRIu64")",
rd_kafka_err2str(err),
rk->rk_consumer.offset);
payload = strdup(tmp);
} else
payload = strdup(rd_kafka_err2str(err));
len = strlen(payload);
}
rd_kafka_op_reply0(rk, rko, type, err, payload, len);
rd_kafka_q_enq(&rk->rk_rep, rko);
}
void rd_kafka_op_reply2 (rd_kafka_t *rk, rd_kafka_op_t *rko) {
rd_kafka_q_enq(&rk->rk_rep, rko);
}
/**
* Propogate an error event to the application.
* If no error_cb has been set by the application the error will
* be logged instead.
*/
void rd_kafka_op_err (rd_kafka_t *rk, rd_kafka_resp_err_t err,
const char *fmt, ...) {
va_list ap;
char buf[2048];
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
if (rk->rk_conf.error_cb)
rd_kafka_op_reply(rk, RD_KAFKA_OP_ERR, err,
strdup(buf), strlen(buf));
else
rd_kafka_log_buf(rk, LOG_ERR, "ERROR", buf);
}
static const char *rd_kafka_type2str (rd_kafka_type_t type) {
static const char *types[] = {
[RD_KAFKA_PRODUCER] = "producer",
[RD_KAFKA_CONSUMER] = "consumer",
};
return types[type];
}
const char *rd_kafka_err2str (rd_kafka_resp_err_t err) {
static __thread char ret[32];
switch (err)
{
case RD_KAFKA_RESP_ERR__BAD_MSG:
return "Local: Bad message format";
case RD_KAFKA_RESP_ERR__BAD_COMPRESSION:
return "Local: Invalid compressed data";
case RD_KAFKA_RESP_ERR__DESTROY:
return "Local: Broker handle destroyed";
case RD_KAFKA_RESP_ERR__FAIL:
return "Local: Communication failure with broker";
case RD_KAFKA_RESP_ERR__TRANSPORT:
return "Local: Broker transport failure";
case RD_KAFKA_RESP_ERR__CRIT_SYS_RESOURCE:
return "Local: Critical system resource failure";
case RD_KAFKA_RESP_ERR__RESOLVE:
return "Local: Host resolution failure";
case RD_KAFKA_RESP_ERR__MSG_TIMED_OUT:
return "Local: Message timed out";
case RD_KAFKA_RESP_ERR__PARTITION_EOF:
return "Broker: No more messages";
case RD_KAFKA_RESP_ERR__UNKNOWN_PARTITION:
return "Local: Unknown partition";
case RD_KAFKA_RESP_ERR__FS:
return "Local: File or filesystem error";
case RD_KAFKA_RESP_ERR__UNKNOWN_TOPIC:
return "Local: Unknown topic";
case RD_KAFKA_RESP_ERR__ALL_BROKERS_DOWN:
return "Local: All broker connections are down";
case RD_KAFKA_RESP_ERR__INVALID_ARG:
return "Local: Invalid argument or configuration";
case RD_KAFKA_RESP_ERR__TIMED_OUT:
return "Local: Timed out";
case RD_KAFKA_RESP_ERR__QUEUE_FULL:
return "Local: Queue full";
case RD_KAFKA_RESP_ERR_UNKNOWN:
return "Unknown error";
case RD_KAFKA_RESP_ERR_NO_ERROR:
return "Success";
case RD_KAFKA_RESP_ERR_OFFSET_OUT_OF_RANGE:
return "Broker: Offset out of range";
case RD_KAFKA_RESP_ERR_INVALID_MSG:
return "Broker: Invalid message";
case RD_KAFKA_RESP_ERR_UNKNOWN_TOPIC_OR_PART:
return "Broker: Unknown topic or partition";
case RD_KAFKA_RESP_ERR_INVALID_MSG_SIZE:
return "Broker: Invalid message size";
case RD_KAFKA_RESP_ERR_LEADER_NOT_AVAILABLE:
return "Broker: Leader not available";
case RD_KAFKA_RESP_ERR_NOT_LEADER_FOR_PARTITION:
return "Broker: Not leader for partition";
case RD_KAFKA_RESP_ERR_REQUEST_TIMED_OUT:
return "Broker: Request timed out";
case RD_KAFKA_RESP_ERR_BROKER_NOT_AVAILABLE:
return "Broker: Broker not available";
case RD_KAFKA_RESP_ERR_REPLICA_NOT_AVAILABLE:
return "Broker: Replica not available";
case RD_KAFKA_RESP_ERR_MSG_SIZE_TOO_LARGE:
return "Broker: Message size too large";
case RD_KAFKA_RESP_ERR_STALE_CTRL_EPOCH:
return "Broker: StaleControllerEpochCode";
case RD_KAFKA_RESP_ERR_OFFSET_METADATA_TOO_LARGE:
return "Broker: Offset metadata string too large";
default:
snprintf(ret, sizeof(ret), "Err-%i?", err);
return ret;
}
}
rd_kafka_resp_err_t rd_kafka_errno2err (int errnox) {
switch (errnox)
{
case EINVAL:
return RD_KAFKA_RESP_ERR__INVALID_ARG;
case ENOENT:
return RD_KAFKA_RESP_ERR__UNKNOWN_TOPIC;
case ESRCH:
return RD_KAFKA_RESP_ERR__UNKNOWN_PARTITION;
case ETIMEDOUT:
return RD_KAFKA_RESP_ERR__TIMED_OUT;
case EMSGSIZE:
return RD_KAFKA_RESP_ERR_MSG_SIZE_TOO_LARGE;
case ENOBUFS:
return RD_KAFKA_RESP_ERR__QUEUE_FULL;
default:
return RD_KAFKA_RESP_ERR__FAIL;
}
}
void rd_kafka_destroy0 (rd_kafka_t *rk) {
if (rd_atomic_sub(&rk->rk_refcnt, 1) > 0)
return;
/* Purge op-queue */
rd_kafka_q_purge(&rk->rk_rep);
rd_kafkap_str_destroy(rk->rk_clientid);
rd_kafka_anyconf_destroy(_RK_GLOBAL, &rk->rk_conf);
pthread_mutex_destroy(&rk->rk_lock);
free(rk);
rd_atomic_sub(&rd_kafka_handle_cnt_curr, 1);
}
/* NOTE: Must only be called by application.
* librdkafka itself must use rd_kafka_destroy0(). */
void rd_kafka_destroy (rd_kafka_t *rk) {
rd_kafka_topic_t *rkt, *rkt_tmp;
rd_kafka_dbg(rk, GENERIC, "DESTROY", "Terminating instance");
(void)rd_atomic_add(&rk->rk_terminate, 1);
/* Decommission all topics */
rd_kafka_lock(rk);
TAILQ_FOREACH_SAFE(rkt, &rk->rk_topics, rkt_link, rkt_tmp) {
rd_kafka_unlock(rk);
rd_kafka_topic_partitions_remove(rkt);
rd_kafka_lock(rk);
}
rd_kafka_unlock(rk);
/* Brokers pick up on rk_terminate automatically. */
rd_kafka_destroy0(rk);
}
/* Stats buffer printf */
#define _st_printf(fmt...) do { \
ssize_t r; \
ssize_t rem = size-of; \
r = snprintf(buf+of, rem, fmt); \
if (r > rem) { \
size *= 2; \
buf = realloc(buf, size); \
r = snprintf(buf+of, size-of, fmt); \
} \
of += r; \
} while (0)
/**
* Emit stats for toppar
*/
static inline void rd_kafka_stats_emit_toppar (char **bufp, size_t *sizep,
int *ofp,
rd_kafka_toppar_t *rktp,
int first) {
char *buf = *bufp;
size_t size = *sizep;
int of = *ofp;
_st_printf("%s\"%"PRId32"\": { "
"\"partition\":%"PRId32", "
"\"leader\":%"PRId32", "
"\"desired\":%s, "
"\"unknown\":%s, "
"\"msgq_cnt\":%i, "
"\"msgq_bytes\":%"PRIu64", "
"\"xmit_msgq_cnt\":%i, "
"\"xmit_msgq_bytes\":%"PRIu64", "
"\"fetchq_cnt\":%i, "
"\"fetch_state\":\"%s\", "
"\"query_offset\":%"PRId64", "
"\"next_offset\":%"PRId64", "
"\"app_offset\":%"PRId64", "
"\"commited_offset\":%"PRId64", "
"\"eof_offset\":%"PRId64", "
"\"txmsgs\":%"PRIu64", "
"\"txbytes\":%"PRIu64" "
"} ",
first ? "" : ", ",
rktp->rktp_partition,
rktp->rktp_partition,
rktp->rktp_leader ? rktp->rktp_leader->rkb_nodeid : -1,
(rktp->rktp_flags&RD_KAFKA_TOPPAR_F_DESIRED)?"true":"false",
(rktp->rktp_flags&RD_KAFKA_TOPPAR_F_UNKNOWN)?"true":"false",
rktp->rktp_msgq.rkmq_msg_cnt,
rktp->rktp_msgq.rkmq_msg_bytes,
rktp->rktp_xmit_msgq.rkmq_msg_cnt,
rktp->rktp_xmit_msgq.rkmq_msg_bytes,
rktp->rktp_fetchq.rkq_qlen,
rd_kafka_fetch_states[rktp->rktp_fetch_state],
rktp->rktp_query_offset,
rktp->rktp_next_offset,
rktp->rktp_app_offset,
rktp->rktp_commited_offset,
rktp->rktp_eof_offset,
rktp->rktp_c.tx_msgs,
rktp->rktp_c.tx_bytes);
*bufp = buf;
*sizep = size;
*ofp = of;
}
/**
* Emit all statistics
*/
static void rd_kafka_stats_emit_all (rd_kafka_t *rk) {
char *buf;
size_t size = 1024*rk->rk_refcnt;
int of = 0;
rd_kafka_broker_t *rkb;
rd_kafka_topic_t *rkt;
rd_kafka_toppar_t *rktp;
rd_ts_t now;
buf = malloc(size);
rd_kafka_lock(rk);
now = rd_clock();
_st_printf("{ "
"\"ts\":%"PRIu64", "
"\"time\":%lli, "
"\"replyq\":%i, "
"\"brokers\":{ "/*open brokers*/,
now,
(signed long long)time(NULL),
rk->rk_rep.rkq_qlen);
TAILQ_FOREACH(rkb, &rk->rk_brokers, rkb_link) {
rd_kafka_broker_lock(rkb);
rd_kafka_avg_rollover(&rkb->rkb_rtt_last, &rkb->rkb_rtt_curr);
_st_printf("%s\"%s\": { "/*open broker*/
"\"name\":\"%s\", "
"\"nodeid\":%"PRId32", "
"\"state\":\"%s\", "
"\"outbuf_cnt\":%i, "
"\"waitresp_cnt\":%i, "
"\"tx\":%"PRIu64", "
"\"txbytes\":%"PRIu64", "
"\"txerrs\":%"PRIu64", "
"\"txretries\":%"PRIu64", "
"\"rx\":%"PRIu64", "
"\"rxbytes\":%"PRIu64", "
"\"rxerrs\":%"PRIu64", "
"\"rxcorriderrs\":%"PRIu64", "
"\"rtt\": {"
" \"min\":%"PRIu64","
" \"max\":%"PRIu64","
" \"avg\":%"PRIu64","
" \"cnt\":%i "
"}, "
"\"toppars\":{ "/*open toppars*/,
rkb == TAILQ_FIRST(&rk->rk_brokers) ? "" : ", ",
rkb->rkb_name,
rkb->rkb_name,
rkb->rkb_nodeid,
rd_kafka_broker_state_names[rkb->rkb_state],
rkb->rkb_outbufs.rkbq_cnt,
rkb->rkb_waitresps.rkbq_cnt,
rkb->rkb_c.tx,
rkb->rkb_c.tx_bytes,
rkb->rkb_c.tx_err,
rkb->rkb_c.tx_retries,
rkb->rkb_c.rx,
rkb->rkb_c.rx_bytes,
rkb->rkb_c.rx_err,
rkb->rkb_c.rx_corrid_err,
rkb->rkb_rtt_last.ra_min,
rkb->rkb_rtt_last.ra_max,
rkb->rkb_rtt_last.ra_avg,
rkb->rkb_rtt_last.ra_cnt);
rd_kafka_broker_toppars_rdlock(rkb);
TAILQ_FOREACH(rktp, &rkb->rkb_toppars, rktp_rkblink) {
_st_printf("%s\"%.*s\": { "
"\"topic\":\"%.*s\", "
"\"partition\":%"PRId32"} ",
rktp==TAILQ_FIRST(&rkb->rkb_toppars)?"":", ",
RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic),
RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic),
rktp->rktp_partition);
}
rd_kafka_broker_toppars_unlock(rkb);
rd_kafka_broker_unlock(rkb);
_st_printf("} "/*close toppars*/
"} "/*close broker*/);
}
_st_printf("}, " /* close "brokers" array */
"\"topics\":{ ");
TAILQ_FOREACH(rkt, &rk->rk_topics, rkt_link) {
int i;
rd_kafka_topic_rdlock(rkt);
_st_printf("%s\"%.*s\": { "
"\"topic\":\"%.*s\", "
"\"partitions\":{ " /*open partitions*/,
rkt==TAILQ_FIRST(&rk->rk_topics)?"":", ",
RD_KAFKAP_STR_PR(rkt->rkt_topic),
RD_KAFKAP_STR_PR(rkt->rkt_topic));
for (i = 0 ; i < rkt->rkt_partition_cnt ; i++)
rd_kafka_stats_emit_toppar(&buf, &size, &of,
rkt->rkt_p[i],
i == 0);
TAILQ_FOREACH(rktp, &rkt->rkt_desp, rktp_rktlink)
rd_kafka_stats_emit_toppar(&buf, &size, &of, rktp,
i++ == 0);
if (rkt->rkt_ua)
rd_kafka_stats_emit_toppar(&buf, &size, &of,
rkt->rkt_ua, i++ == 0);
rd_kafka_topic_unlock(rkt);
_st_printf("} "/*close partitions*/
"} "/*close topic*/);
}
rd_kafka_unlock(rk);
_st_printf("} "/*close topics*/
"}"/*close object*/);
/* Enqueue op for application */
rd_kafka_op_reply(rk, RD_KAFKA_OP_STATS, 0, buf, of);
}
static void rd_kafka_topic_scan_tmr_cb (rd_kafka_t *rk, void *arg) {
rd_kafka_topic_scan_all(rk, rd_clock());
}
static void rd_kafka_stats_emit_tmr_cb (rd_kafka_t *rk, void *arg) {
rd_kafka_stats_emit_all(rk);
}
/**
* Main loop for Kafka handler thread.
*/
static void *rd_kafka_thread_main (void *arg) {
rd_kafka_t *rk = arg;
rd_kafka_timer_t tmr_topic_scan = {};
rd_kafka_timer_t tmr_stats_emit = {};
(void)rd_atomic_add(&rd_kafka_thread_cnt_curr, 1);
rd_kafka_timer_start(rk, &tmr_topic_scan, 1000000,
rd_kafka_topic_scan_tmr_cb, NULL);
rd_kafka_timer_start(rk, &tmr_stats_emit,
rk->rk_conf.stats_interval_ms * 1000,
rd_kafka_stats_emit_tmr_cb, NULL);
while (likely(rk->rk_terminate == 0)) {
rd_kafka_timers_run(rk, 1000000);
}
rd_kafka_destroy0(rk); /* destroy handler thread's refcnt */
(void)rd_atomic_sub(&rd_kafka_thread_cnt_curr, 1);
return NULL;
}
static void rd_kafka_global_init (void) {
}
rd_kafka_t *rd_kafka_new (rd_kafka_type_t type, rd_kafka_conf_t *conf,
char *errstr, size_t errstr_size) {
rd_kafka_t *rk;
static int rkid = 0;
pthread_attr_t attr;
int err;
pthread_once(&rd_kafka_global_init_once, rd_kafka_global_init);
/*
* Set up the handle.
*/
rk = calloc(1, sizeof(*rk));
rk->rk_type = type;
if (!conf)
conf = rd_kafka_conf_new();
rk->rk_conf = *conf;
free(conf);
rd_kafka_keep(rk); /* application refcnt */
pthread_mutex_init(&rk->rk_lock, NULL);
rd_kafka_q_init(&rk->rk_rep);
TAILQ_INIT(&rk->rk_brokers);
TAILQ_INIT(&rk->rk_topics);
TAILQ_INIT(&rk->rk_timers);
pthread_mutex_init(&rk->rk_timers_lock, NULL);
pthread_cond_init(&rk->rk_timers_cond, NULL);
rk->rk_log_cb = rd_kafka_log_print;
if (rk->rk_conf.debug)
rd_kafka_set_log_level(rk, LOG_DEBUG);
else
rk->rk_log_level = LOG_INFO;
/* Construct a client id if none is given. */
if (!rk->rk_conf.clientid)
rk->rk_conf.clientid = strdup("rdkafka");
snprintf(rk->rk_name, sizeof(rk->rk_name), "%s#%s-%i",
rk->rk_conf.clientid, rd_kafka_type2str(rk->rk_type), rkid++);
/* Construct clientid kafka string */
rk->rk_clientid = rd_kafkap_str_new(rk->rk_conf.clientid);
if (rk->rk_type == RD_KAFKA_CONSUMER) {
/* Pre-build RequestHeader */
rk->rk_conf.FetchRequest.ReplicaId = htonl(-1);
rk->rk_conf.FetchRequest.MaxWaitTime =
htonl(rk->rk_conf.fetch_wait_max_ms);
rk->rk_conf.FetchRequest.MinBytes =
htonl(rk->rk_conf.fetch_min_bytes);
}
/* Create handler thread */
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
rd_kafka_keep(rk); /* one refcnt for handler thread */
if ((err = pthread_create(&rk->rk_thread, &attr,
rd_kafka_thread_main, rk))) {
if (errstr)
snprintf(errstr, errstr_size,
"Failed to create thread: %s", strerror(err));
rd_kafka_destroy0(rk); /* handler thread */
rd_kafka_destroy0(rk); /* application refcnt */
errno = err;
return NULL;
}
/* Add initial list of brokers from configuration */
if (rk->rk_conf.brokerlist)
rd_kafka_brokers_add(rk, rk->rk_conf.brokerlist);
rd_atomic_add(&rd_kafka_handle_cnt_curr, 1);
return rk;
}
/**
* Produce a single message.
* Locality: any application thread
*/
int rd_kafka_produce (rd_kafka_topic_t *rkt, int32_t partition,
int msgflags,
void *payload, size_t len,
const void *key, size_t keylen,
void *msg_opaque) {
return rd_kafka_msg_new(rkt, partition,
msgflags, payload, len,
key, keylen, msg_opaque);
}
int rd_kafka_consume_start (rd_kafka_topic_t *rkt, int32_t partition,
int64_t offset) {
rd_kafka_toppar_t *rktp;
if (partition < 0) {
errno = ESRCH;
return -1;
}
rd_kafka_topic_wrlock(rkt);
rktp = rd_kafka_toppar_desired_add(rkt, partition);
rd_kafka_topic_unlock(rkt);
rd_kafka_toppar_lock(rktp);
switch (offset)
{
case RD_KAFKA_OFFSET_BEGINNING:
case RD_KAFKA_OFFSET_END:
rktp->rktp_query_offset = offset;
rktp->rktp_fetch_state = RD_KAFKA_TOPPAR_FETCH_OFFSET_QUERY;
break;
case RD_KAFKA_OFFSET_STORED:
if (!rkt->rkt_conf.auto_commit) {
rd_kafka_toppar_unlock(rktp);
rd_kafka_toppar_destroy(rktp);
errno = EINVAL;
return -1;
}
rd_kafka_offset_store_init(rktp);
break;
default:
rktp->rktp_next_offset = offset;
rktp->rktp_fetch_state = RD_KAFKA_TOPPAR_FETCH_ACTIVE;
}
rd_kafka_toppar_unlock(rktp);
rd_kafka_dbg(rkt->rkt_rk, TOPIC, "CONSUMER",
"Start consuming %.*s [%"PRId32"] at "
"offset %"PRId64,