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kafka.c
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/**
* Copyright 2015 Elias Van Ootegem.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Special thanks to Patrick Reilly and Aleksandar Babic for their work
* On which this extension was actually built.
*/
#include <php.h>
#include "kafka.h"
#include <php_kafka.h>
#include <inttypes.h>
#include <ctype.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <syslog.h>
#include <sys/time.h>
#include <errno.h>
#include <time.h>
#include "kafka.h"
#include "librdkafka/rdkafka.h"
struct consume_cb_params {
int read_count;
zval *return_value;
union {
int *partition_ends;
long *partition_offset;
};
int error_count;
int eop;
int auto_commit;
};
struct produce_cb_params {
int msg_count;
int err_count;
int offset;
int partition;
int errmsg_len;
char *err_msg;
};
static int log_level = 1;
static rd_kafka_t *rk = NULL;
static rd_kafka_type_t rk_type;
char *brokers = "localhost:9092";
int partition = RD_KAFKA_PARTITION_UA;
void kafka_connect(char *brokers)
{
kafka_setup(brokers);
}
void kafka_set_log_level( int ll )
{
log_level = ll;
}
void kafka_msg_delivered (rd_kafka_t *rk,
void *payload, size_t len,
int error_code,
void *opaque, void *msg_opaque)
{
if (error_code && log_level) {
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_INFO, "phpkafka - Message delivery failed: %s",
rd_kafka_err2str(error_code));
}
}
void kafka_err_cb (rd_kafka_t *rk, int err, const char *reason, void *opaque)
{
if (log_level) {
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_INFO, "phpkafka - ERROR CALLBACK: %s: %s: %s\n",
rd_kafka_name(rk), rd_kafka_err2str(err), reason);
}
if (rk)
rd_kafka_destroy(rk);
}
void kafka_produce_cb_simple(rd_kafka_t *rk, void *payload, size_t len, int err_code, void *opaque, void *msg_opaque)
{
struct produce_cb_params *params = msg_opaque;
if (params)
{
params->msg_count -=1;
}
if (log_level)
{
if (params)
params->err_count += 1;
openlog("phpkafka", 0, LOG_USER);
if (err_code)
syslog(LOG_ERR, "Failed to deliver message %s: %s", (char *) payload, rd_kafka_err2str(err_code));
else
syslog(LOG_DEBUG, "Successfuly delevired message (%zd bytes)", len);
}
}
void kafka_produce_detailed_cb(rd_kafka_t *rk, const rd_kafka_message_t *msg, void *opaque)
{
struct produce_cb_params *params = opaque;
if (params)
{
params->msg_count -= 1;
}
if (msg->err)
{
int offset = params->errmsg_len,
err_len = 0;
const char *errstr = rd_kafka_message_errstr(msg);
err_len = strlen(errstr);
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ERR, "Failed to deliver message: %s", errstr);
}
if (params)
{
params->err_count += 1;
params->err_msg = realloc(
params->err_msg,
(offset + err_len + 2) * sizeof params->err_msg
);
if (params->err_msg == NULL)
{
params->errmsg_len = 0;
}
else
{
strcpy(
params->err_msg + offset,
errstr
);
offset += err_len;//get new strlen
params->err_msg[offset] = '\n';//add new line
++offset;
params->err_msg[offset] = '\0';//ensure zero terminated string
}
}
return;
}
if (params)
{
params->offset = msg->offset;
params->partition = msg->partition;
}
}
rd_kafka_t *kafka_get_connection(kafka_connection_params params, const char *brokers)
{
rd_kafka_t *r = NULL;
char errstr[512];
rd_kafka_conf_t *conf = rd_kafka_conf_new();
//set error callback
rd_kafka_conf_set_error_cb(conf, kafka_err_cb);
if (params.type == RD_KAFKA_CONSUMER)
{
if (params.queue_buffer)
rd_kafka_conf_set(conf, "queued.min.messages", params.queue_buffer, NULL, 0);
r = rd_kafka_new(params.type, conf, errstr, sizeof errstr);
if (!r)
{
if (params.log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ERR, "Failed to connect to kafka: %s", errstr);
}
//destroy config, no connection to use it...
rd_kafka_conf_destroy(conf);
return NULL;
}
if (!rd_kafka_brokers_add(r, brokers))
{
if (params.log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ERR, "Failed to connect to brokers %s", brokers);
}
rd_kafka_destroy(r);
return NULL;
}
return r;
}
if (params.compression)
{
rd_kafka_conf_res_t result = rd_kafka_conf_set(
conf, "compression.codec",params.compression, errstr, sizeof errstr
);
if (result != RD_KAFKA_CONF_OK)
{
if (params.log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ALERT, "Failed to set compression %s: %s", params.compression, errstr);
}
rd_kafka_conf_destroy(conf);
return NULL;
}
}
if (params.retry_count)
{
rd_kafka_conf_res_t result = rd_kafka_conf_set(
conf, "message.send.max.retries",params.retry_count, errstr, sizeof errstr
);
if (result != RD_KAFKA_CONF_OK)
{
if (params.log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ALERT, "Failed to set compression %s: %s", params.compression, errstr);
}
rd_kafka_conf_destroy(conf);
return NULL;
}
}
if (params.retry_interval)
{
rd_kafka_conf_res_t result = rd_kafka_conf_set(
conf, "retry.backoff.ms",params.retry_interval, errstr, sizeof errstr
);
if (result != RD_KAFKA_CONF_OK)
{
if (params.log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ALERT, "Failed to set compression %s: %s", params.compression, errstr);
}
rd_kafka_conf_destroy(conf);
return NULL;
}
}
if (params.reporting == 1)
rd_kafka_conf_set_dr_cb(conf, kafka_produce_cb_simple);
else if (params.reporting == 2)
rd_kafka_conf_set_dr_msg_cb(conf, kafka_produce_detailed_cb);
r = rd_kafka_new(params.type, conf, errstr, sizeof errstr);
if (!r)
{
if (params.log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ERR, "Failed to connect to kafka: %s", errstr);
}
//destroy config, no connection to use it...
rd_kafka_conf_destroy(conf);
return NULL;
}
if (!rd_kafka_brokers_add(r, brokers))
{
if (params.log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ERR, "Failed to connect to brokers %s", brokers);
}
rd_kafka_destroy(r);
return NULL;
}
return r;
}
rd_kafka_t *kafka_set_connection(rd_kafka_type_t type, const char *b, int report_level, const char *compression)
{
rd_kafka_t *r = NULL;
char *tmp = brokers;
char errstr[512];
rd_kafka_conf_t *conf = rd_kafka_conf_new();
if (!(r = rd_kafka_new(type, conf, errstr, sizeof(errstr)))) {
if (log_level) {
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_INFO, "phpkafka - failed to create new producer: %s", errstr);
}
exit(1);
}
/* Add brokers */
if (rd_kafka_brokers_add(r, b) == 0) {
if (log_level) {
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_INFO, "php kafka - No valid brokers specified");
}
exit(1);
}
/* Set up a message delivery report callback.
* It will be called once for each message, either on successful
* delivery to broker, or upon failure to deliver to broker. */
if (type == RD_KAFKA_PRODUCER)
{
if (compression && !strcmp(compression, "none"))
{//silently fail on error ATM...
if (RD_KAFKA_CONF_OK != rd_kafka_conf_set(conf, "compression.codec", compression, errstr, sizeof errstr))
{
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_INFO, "Failed to set compression to %s", compression);
}
}
}
if (report_level == 1)
rd_kafka_conf_set_dr_cb(conf, kafka_produce_cb_simple);
else if (report_level == 2)
rd_kafka_conf_set_dr_msg_cb(conf, kafka_produce_detailed_cb);
}
rd_kafka_conf_set_error_cb(conf, kafka_err_cb);
if (log_level) {
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_INFO, "phpkafka - using: %s", brokers);
}
return r;
}
void kafka_set_partition(int partition_selected)
{
partition = partition_selected;
}
void kafka_setup(char* brokers_list)
{
brokers = brokers_list;
}
void kafka_destroy(rd_kafka_t *r, int timeout)
{
if(r != NULL)
{
//poll handle status
rd_kafka_poll(r, 0);
if (rd_kafka_outq_len(r) > 0)
{//wait for out-queue to clear
while(rd_kafka_outq_len(r) > 0)
rd_kafka_poll(r, timeout);
timeout = 1;
}
rd_kafka_destroy(r);
//this wait is blocking PHP
//not calling it will yield segfault, though
rd_kafka_wait_destroyed(timeout);
r = NULL;
}
}
//We're no longer relying on the global rk variable (not thread-safe)
static void kafka_init( rd_kafka_type_t type )
{
if (rk && type != rk_type)
{
rd_kafka_destroy(rk);
rk = NULL;
}
if (rk == NULL)
{
char errstr[512];
rd_kafka_conf_t *conf = rd_kafka_conf_new();
if (!(rk = rd_kafka_new(type, conf, errstr, sizeof(errstr)))) {
if (log_level) {
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_INFO, "phpkafka - failed to create new producer: %s", errstr);
}
exit(1);
}
/* Add brokers */
if (rd_kafka_brokers_add(rk, brokers) == 0) {
if (log_level) {
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_INFO, "php kafka - No valid brokers specified");
}
exit(1);
}
/* Set up a message delivery report callback.
* It will be called once for each message, either on successful
* delivery to broker, or upon failure to deliver to broker. */
if (type == RD_KAFKA_PRODUCER)
rd_kafka_conf_set_dr_cb(conf, kafka_produce_cb_simple);
rd_kafka_conf_set_error_cb(conf, kafka_err_cb);
if (log_level) {
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_INFO, "phpkafka - using: %s", brokers);
}
}
}
int kafka_produce_report(rd_kafka_t *r, const char *topic, char *msg, int msg_len, long timeout)
{
char errstr[512];
rd_kafka_topic_t *rkt = NULL;
int partition = RD_KAFKA_PARTITION_UA;
rd_kafka_topic_conf_t *conf = NULL;
struct produce_cb_params pcb = {1, 0, 0, 0, 0, NULL};
if (r == NULL)
{
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ERR, "No connection provided to produce to topic %s", topic);
}
return -2;
}
/* Topic configuration */
conf = rd_kafka_topic_conf_new();
rd_kafka_topic_conf_set(conf,"produce.offset.report", "true", errstr, sizeof errstr );
char timeoutStr[64];
snprintf(timeoutStr, 64, "%lu", timeout);
if (rd_kafka_topic_conf_set(conf, "message.timeout.ms", timeoutStr, errstr, sizeof(errstr)) != RD_KAFKA_CONF_OK)
{
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(
LOG_ERR,
"Failed to configure topic param 'message.timeout.ms' to %lu before producing; config err was: %s",
timeout,
errstr
);
}
rd_kafka_topic_conf_destroy(conf);
return -3;
}
//callback already set in kafka_set_connection
rkt = rd_kafka_topic_new(r, topic, conf);
if (!rkt)
{
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ERR, "Failed to open topic %s", topic);
}
rd_kafka_topic_conf_destroy(conf);
return -1;
}
//begin producing:
if (rd_kafka_produce(rkt, partition, RD_KAFKA_MSG_F_COPY, msg, msg_len,NULL, 0,&pcb) == -1)
{
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ERR, "Failed to produce message: %s", rd_kafka_err2str(rd_kafka_errno2err(errno)));
}
//handle delivery response (callback)
rd_kafka_poll(rk, 0);
rd_kafka_topic_destroy(rkt);
return -1;
}
rd_kafka_poll(rk, 0);
while(pcb.msg_count && rd_kafka_outq_len(r) > 0)
rd_kafka_poll(r, 10);
rd_kafka_topic_destroy(rkt);
return 0;
}
int kafka_produce_batch(rd_kafka_t *r, char *topic, char **msg, int *msg_len, int msg_cnt, int report, long timeout)
{
char errstr[512];
rd_kafka_topic_t *rkt;
struct produce_cb_params pcb = {msg_cnt, 0, 0, 0, 0, NULL};
void *opaque;
int partition = RD_KAFKA_PARTITION_UA;
int i,
err_cnt = 0;
if (report)
opaque = &pcb;
else
opaque = NULL;
rd_kafka_topic_conf_t *topic_conf;
if (r == NULL)
{
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ERR, "phpkafka - no connection to produce to topic: %s", topic);
}
return -2;
}
/* Topic configuration */
topic_conf = rd_kafka_topic_conf_new();
char timeoutStr[64];
snprintf(timeoutStr, 64, "%lu", timeout);
if (rd_kafka_topic_conf_set(topic_conf, "message.timeout.ms", timeoutStr, errstr, sizeof(errstr)) != RD_KAFKA_CONF_OK)
{
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(
LOG_ERR,
"Failed to configure topic param 'message.timeout.ms' to %lu before producing; config err was: %s",
timeout,
errstr
);
}
rd_kafka_topic_conf_destroy(topic_conf);
return -3;
}
/* Create topic */
rkt = rd_kafka_topic_new(r, topic, topic_conf);
//do we have VLA?
rd_kafka_message_t *messages = calloc(sizeof *messages, msg_cnt);
if (messages == NULL)
{//fallback to individual produce calls
for (i=0;i<msg_cnt;++i)
{
if (rd_kafka_produce(rkt, partition, RD_KAFKA_MSG_F_COPY, msg[i], msg_len[i], NULL, 0, opaque) == -1)
{
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_INFO, "phpkafka - %% Failed to produce to topic %s "
"partition %i: %s",
rd_kafka_topic_name(rkt), partition,
rd_kafka_err2str(
rd_kafka_errno2err(errno)));
}
}
}
}
else
{
for (i=0;i<msg_cnt;++i)
{
messages[i].payload = msg[i];
messages[i].len = msg_len[i];
}
i = rd_kafka_produce_batch(rkt, partition, RD_KAFKA_MSG_F_COPY, messages, msg_cnt);
if (i < msg_cnt)
{
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_WARNING, "Failed to queue full message batch, %d of %d were put in queue", i, msg_cnt);
}
}
err_cnt = msg_cnt - i;
free(messages);
messages = NULL;
}
/* Poll to handle delivery reports */
rd_kafka_poll(r, 0);
/* Wait for messages to be delivered */
while (report && pcb.msg_count && rd_kafka_outq_len(r) > 0)
rd_kafka_poll(r, 10);
//set global to NULL again
rd_kafka_topic_destroy(rkt);
if (report)
err_cnt = pcb.err_count;
return err_cnt;
}
int kafka_produce(rd_kafka_t *r, char* topic, char* msg, int msg_len, int report, long timeout)
{
char errstr[512];
rd_kafka_topic_t *rkt;
struct produce_cb_params pcb = {1, 0, 0, 0, 0, NULL};
void *opaque;
int partition = RD_KAFKA_PARTITION_UA;
//decide whether to pass callback params or not...
if (report)
opaque = &pcb;
else
opaque = NULL;
rd_kafka_topic_conf_t *topic_conf;
if (r == NULL)
{
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ERR, "phpkafka - no connection to produce to topic: %s", topic);
}
return -2;
}
/* Topic configuration */
topic_conf = rd_kafka_topic_conf_new();
char timeoutStr[64];
snprintf(timeoutStr, 64, "%lu", timeout);
if (rd_kafka_topic_conf_set(topic_conf, "message.timeout.ms", timeoutStr, errstr, sizeof(errstr)) != RD_KAFKA_CONF_OK)
{
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(
LOG_ERR,
"Failed to configure topic param 'message.timeout.ms' to %lu before producing; config err was: %s",
timeout,
errstr
);
}
rd_kafka_topic_conf_destroy(topic_conf);
return -3;
}
/* Create topic */
rkt = rd_kafka_topic_new(r, topic, topic_conf);
if (rd_kafka_produce(rkt, partition,
RD_KAFKA_MSG_F_COPY,
/* Payload and length */
msg, msg_len,
/* Optional key and its length */
NULL, 0,
/* Message opaque, provided in
* delivery report callback as
* msg_opaque. */
opaque) == -1) {
if (log_level) {
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_INFO, "phpkafka - %% Failed to produce to topic %s "
"partition %i: %s",
rd_kafka_topic_name(rkt), partition,
rd_kafka_err2str(
rd_kafka_errno2err(errno)));
}
rd_kafka_topic_destroy(rkt);
return -1;
}
/* Poll to handle delivery reports */
rd_kafka_poll(r, 0);
/* Wait for messages to be delivered */
while (report && pcb.msg_count && rd_kafka_outq_len(r) > 0)
rd_kafka_poll(r, 10);
//set global to NULL again
rd_kafka_topic_destroy(rkt);
return 0;
}
static
void offset_queue_consume(rd_kafka_message_t *message, void *opaque)
{
struct consume_cb_params *params = opaque;
if (params->eop == 0)
return;
if (message->err)
{
params->error_count += 1;
if (params->auto_commit == 0)
rd_kafka_offset_store(
message->rkt,
message->partition,
message->offset == 0 ? 0 : message->offset -1
);
if (message->err == RD_KAFKA_RESP_ERR__PARTITION_EOF)
{
if (params->partition_offset[message->partition] == -2)
{//no previous message read from this partition
//set offset value to last possible value (-1 or last existing)
//reduce eop count
params->eop -= 1;
params->read_count += 1;
params->partition_offset[message->partition] = message->offset -1;
}
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_INFO,
"phpkafka - %% Consumer reached end of %s [%"PRId32"] "
"message queue at offset %"PRId64"\n",
rd_kafka_topic_name(message->rkt),
message->partition, message->offset);
}
}
return;
}
if (params->partition_offset[message->partition] == -1)
params->eop -= 1;
//we have an offset, save it
params->partition_offset[message->partition] = message->offset;
//tally read_count
params->read_count += 1;
if (params->auto_commit == 0)
rd_kafka_offset_store(
message->rkt,
message->partition,
message->offset == 0 ? 0 : message->offset -1
);
}
static
void queue_consume(rd_kafka_message_t *message, void *opaque)
{
struct consume_cb_params *params = opaque;
zval *return_value = params->return_value;
//all partitions EOF
if (params->eop < 1)
return;
//nothing more to read...
if (params->read_count == 0)
return;
if (message->err)
{
params->error_count += 1;
//if auto-commit is disabled:
if (params->auto_commit == 0)
//store offset
rd_kafka_offset_store(
message->rkt,
message->partition,
message->offset == 0 ? 0 : message->offset -1
);
if (message->err == RD_KAFKA_RESP_ERR__PARTITION_EOF)
{
if (params->partition_ends[message->partition] == 0)
{
params->eop -= 1;
params->partition_ends[message->partition] = 1;
}
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_INFO,
"phpkafka - %% Consumer reached end of %s [%"PRId32"] "
"message queue at offset %"PRId64"\n",
rd_kafka_topic_name(message->rkt),
message->partition, message->offset);
}
return;
}
//add_next_index_string(return_value, rd_kafka_message_errstr(message), 1);
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_INFO, "phpkafka - %% Consume error for topic \"%s\" [%"PRId32"] "
"offset %"PRId64": %s\n",
rd_kafka_topic_name(message->rkt),
message->partition,
message->offset,
rd_kafka_message_errstr(message)
);
}
return;
}
//only count successful reads!
//-1 means read all from offset until end
if (params->read_count != -1)
params->read_count -= 1;
//add message to return value (perhaps add as array -> offset + msg?
if (message->len > 0) {
//ensure there is a payload
char payload[(int) message->len];
sprintf(payload, "%.*s", (int) message->len, (char *) message->payload);
//add_index_string(return_value, (int) message->offset, payload, 1);
add_next_index_string(return_value, payload, 1);
} else {
add_next_index_string(return_value, "", 1);
}
//store offset if autocommit is disabled
if (params->auto_commit == 0)
rd_kafka_offset_store(
message->rkt,
message->partition,
message->offset
);
}
static rd_kafka_message_t *msg_consume(rd_kafka_message_t *rkmessage,
void *opaque)
{
int *run = opaque;
if (rkmessage->err)
{
*run = 0;
if (rkmessage->err == RD_KAFKA_RESP_ERR__PARTITION_EOF)
{
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_INFO,
"phpkafka - %% Consumer reached end of %s [%"PRId32"] "
"message queue at offset %"PRId64"\n",
rd_kafka_topic_name(rkmessage->rkt),
rkmessage->partition, rkmessage->offset);
}
return NULL;
}
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_INFO, "phpkafka - %% Consume error for topic \"%s\" [%"PRId32"] "
"offset %"PRId64": %s\n",
rd_kafka_topic_name(rkmessage->rkt),
rkmessage->partition,
rkmessage->offset,
rd_kafka_message_errstr(rkmessage)
);
}
return NULL;
}
return rkmessage;
}
//get topics + partition count
void kafka_get_topics(rd_kafka_t *r, zval *return_value)
{
int i;
const struct rd_kafka_metadata *meta = NULL;
if (r == NULL)
{
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ERR, "phpkafka - no connection to get topics");
}
return;
}
if (RD_KAFKA_RESP_ERR_NO_ERROR == rd_kafka_metadata(r, 1, NULL, &meta, 200)) {
for (i=0;i<meta->topic_cnt;++i) {
add_assoc_long(
return_value,
meta->topics[i].topic,
(long) meta->topics[i].partition_cnt
);
}
}
if (meta) {
rd_kafka_metadata_destroy(meta);
}
}
static
int kafka_partition_count(rd_kafka_t *r, const char *topic)
{
rd_kafka_topic_t *rkt;
rd_kafka_topic_conf_t *conf;
int i;//C89 compliant
//connect as consumer if required
if (r == NULL)
{
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ERR, "phpkafka - no connection to get partition count for topic: %s", topic);
}
return -1;
}
/* Topic configuration */
conf = rd_kafka_topic_conf_new();
/* Create topic */
rkt = rd_kafka_topic_new(r, topic, conf);
//metadata API required rd_kafka_metadata_t** to be passed
const struct rd_kafka_metadata *meta = NULL;
if (RD_KAFKA_RESP_ERR_NO_ERROR == rd_kafka_metadata(r, 0, rkt, &meta, 200))
i = (int) meta->topics->partition_cnt;
else
i = 0;
if (meta) {
rd_kafka_metadata_destroy(meta);
}
rd_kafka_topic_destroy(rkt);
return i;
}
//get the available partitions for a given topic
void kafka_get_partitions(rd_kafka_t *r, zval *return_value, char *topic)
{
//we need a connection!
if (r == NULL)
return;
int i, count = kafka_partition_count(r, topic);
for (i=0;i<count;++i) {
add_next_index_long(return_value, i);
}
}
/**
* @brief Get all partitions for topic and their beginning offsets, useful
* if we're consuming messages without knowing the actual partition beforehand
* @param int **partitions should be pointer to NULL, will be allocated here
* @param const char * topic topic name
* @return int (0 == meta error, -2: no connection, -1: allocation error, all others indicate success (nr of elems in array))
*/
int kafka_partition_offsets(rd_kafka_t *r, long **partitions, const char *topic)
{
rd_kafka_topic_t *rkt = NULL;
rd_kafka_topic_conf_t *conf = NULL;
rd_kafka_queue_t *rkqu = NULL;
struct consume_cb_params cb_params = {0, NULL, NULL, 0, 0, 0};
int i = 0;
//make life easier, 1 level of indirection...
long *values = *partitions;
//connect as consumer if required
if (r == NULL)
{
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ERR, "phpkafka - no connection to get offsets of topic: %s", topic);
}
return -2;
}
/* Topic configuration */
conf = rd_kafka_topic_conf_new();
/* Create topic */
rkt = rd_kafka_topic_new(r, topic, conf);
rkqu = rd_kafka_queue_new(rk);
const struct rd_kafka_metadata *meta = NULL;
if (RD_KAFKA_RESP_ERR_NO_ERROR == rd_kafka_metadata(r, 0, rkt, &meta, 5))
{
values = realloc(values, meta->topics->partition_cnt * sizeof *values);
if (values == NULL)
{
*partitions = values;//possible corrupted pointer now
//free metadata, return error
rd_kafka_metadata_destroy(meta);
return -1;
}
//we need eop to reach 0, if there are 4 partitions, start at 3 (0, 1, 2, 3)
cb_params.eop = meta->topics->partition_cnt -1;
cb_params.partition_offset = values;
for (i=0;i<meta->topics->partition_cnt;++i)
{
//initialize: set to -2 for callback
values[i] = -2;
if (rd_kafka_consume_start_queue(rkt, meta->topics->partitions[i].id, RD_KAFKA_OFFSET_BEGINNING, rkqu))
{
if (log_level)
{
openlog("phpkafka", 0, LOG_USER);
syslog(LOG_ERR,
"Failed to start consuming topic %s [%"PRId32"]",
topic, meta->topics->partitions[i].id
);
}
continue;
}
}
//eiter eop reached 0, or the read errors >= nr of partitions
//either way, we've consumed a message from each partition, and therefore, we're done
while(cb_params.eop && cb_params.error_count < meta->topics->partition_cnt)
rd_kafka_consume_callback_queue(rkqu, 100, offset_queue_consume, &cb_params);
//stop consuming for all partitions
for (i=0;i<meta->topics->partition_cnt;++i)
rd_kafka_consume_stop(rkt, meta->topics[0].partitions[i].id);
rd_kafka_queue_destroy(rkqu);
//do we need this poll here?
while(rd_kafka_outq_len(r) > 0)
rd_kafka_poll(r, 5);
//let's be sure to pass along the correct values here...
*partitions = values;
i = meta->topics->partition_cnt;
}
if (meta)
rd_kafka_metadata_destroy(meta);
rd_kafka_topic_destroy(rkt);
return i;
}
void kafka_consume_all(rd_kafka_t *rk, zval *return_value, const char *topic, const char *offset, int item_count)
{
char errstr[512];
rd_kafka_topic_t *rkt;
rd_kafka_topic_conf_t *conf;
const struct rd_kafka_metadata *meta = NULL;
rd_kafka_queue_t *rkqu = NULL;
int current, p, i = 0;
int32_t partition = 0;
int64_t start;
struct consume_cb_params cb_params = {item_count, return_value, NULL, 0, 0, 0};
//check for NULL pointers, all arguments are required!
if (rk == NULL || return_value == NULL || topic == NULL || offset == NULL || strlen(offset) == 0)
return;
if (!strcmp(offset, "end"))