int main (int argc, char **argv) {
std::string brokers = "localhost";
std::string errstr;
std::vector<std::string> topics;
std::string conf_file;
std::string mode = "P";
int throughput = 0;
int32_t partition = RdKafka::Topic::PARTITION_UA;
bool do_conf_dump = false;
MyHashPartitionerCb hash_partitioner;
/*
* Create configuration objects
*/
RdKafka::Conf *conf = RdKafka::Conf::create(RdKafka::Conf::CONF_GLOBAL);
RdKafka::Conf *tconf = RdKafka::Conf::create(RdKafka::Conf::CONF_TOPIC);
{
char hostname[128];
gethostname(hostname, sizeof(hostname)-1);
conf->set("client.id", std::string("rdkafka@") + hostname, errstr);
}
conf->set("debug", "cgrp,topic", errstr);
for (int i = 1 ; i < argc ; i++) {
const char *name = argv[i];
const char *val = i+1 < argc ? argv[i+1] : NULL;
if (val && !strncmp(val, "--", 2))
val = NULL;
std::cout << now() << ": argument: " << name << " " <<
(val?val:"") << std::endl;
if (val) {
if (!strcmp(name, "--topic"))
topics.push_back(val);
else if (!strcmp(name, "--broker-list"))
brokers = val;
else if (!strcmp(name, "--max-messages"))
state.maxMessages = atoi(val);
else if (!strcmp(name, "--throughput"))
throughput = atoi(val);
else if (!strcmp(name, "--producer.config") ||
!strcmp(name, "--consumer.config"))
read_conf_file(val);
else if (!strcmp(name, "--group-id"))
conf->set("group.id", val, errstr);
else if (!strcmp(name, "--session-timeout"))
conf->set("session.timeout.ms", val, errstr);
else if (!strcmp(name, "--reset-policy")) {
if (tconf->set("auto.offset.reset", val, errstr)) {
std::cerr << now() << ": " << errstr << std::endl;
exit(1);
}
} else if (!strcmp(name, "--debug")) {
conf->set("debug", val, errstr);
} else {
std::cerr << now() << ": Unknown option " << name << std::endl;
exit(1);
}
i++;
} else {
if (!strcmp(name, "--consumer"))
mode = "C";
else if (!strcmp(name, "--producer"))
mode = "P";
else if (!strcmp(name, "--enable-autocommit")) {
state.consumer.useAutoCommit = true;
conf->set("enable.auto.commit", "true", errstr);
} else {
std::cerr << now() << ": Unknown option or missing argument to " << name << std::endl;
exit(1);
}
}
}
if (topics.empty() || brokers.empty()) {
std::cerr << now() << ": Missing --topic and --broker-list" << std::endl;
exit(1);
}
/*
* Set configuration properties
*/
conf->set("metadata.broker.list", brokers, errstr);
ExampleEventCb ex_event_cb;
conf->set("event_cb", &ex_event_cb, errstr);
if (do_conf_dump) {
int pass;
for (pass = 0 ; pass < 2 ; pass++) {
std::list<std::string> *dump;
if (pass == 0) {
dump = conf->dump();
std::cerr << now() << ": # Global config" << std::endl;
} else {
dump = tconf->dump();
std::cerr << now() << ": # Topic config" << std::endl;
}
for (std::list<std::string>::iterator it = dump->begin();
it != dump->end(); ) {
std::cerr << *it << " = ";
it++;
std::cerr << *it << std::endl;
it++;
}
std::cerr << std::endl;
}
exit(0);
}
signal(SIGINT, sigterm);
signal(SIGTERM, sigterm);
signal(SIGALRM, sigwatchdog);
if (mode == "P") {
/*
* Producer mode
*/
ExampleDeliveryReportCb ex_dr_cb;
/* Set delivery report callback */
conf->set("dr_cb", &ex_dr_cb, errstr);
/*
* Create producer using accumulated global configuration.
*/
RdKafka::Producer *producer = RdKafka::Producer::create(conf, errstr);
if (!producer) {
std::cerr << now() << ": Failed to create producer: " << errstr << std::endl;
exit(1);
}
std::cerr << now() << ": % Created producer " << producer->name() << std::endl;
/*
* Create topic handle.
*/
RdKafka::Topic *topic = RdKafka::Topic::create(producer, topics[0],
tconf, errstr);
if (!topic) {
std::cerr << now() << ": Failed to create topic: " << errstr << std::endl;
exit(1);
}
static const int delay_us = throughput ? 1000000/throughput : 0;
if (state.maxMessages == -1)
state.maxMessages = 1000000; /* Avoid infinite produce */
for (int i = 0 ; run && i < state.maxMessages ; i++) {
/*
* Produce message
*/
std::ostringstream msg;
msg << i;
RdKafka::ErrorCode resp =
producer->produce(topic, partition,
RdKafka::Producer::RK_MSG_COPY /* Copy payload */,
const_cast<char *>(msg.str().c_str()),
msg.str().size(), NULL, NULL);
if (resp != RdKafka::ERR_NO_ERROR) {
errorString("producer_send_error",
RdKafka::err2str(resp), topic->name(), NULL, msg.str());
state.producer.numErr++;
} else {
std::cerr << now() << ": % Produced message (" <<
msg.str().size() << " bytes)" << std::endl;
state.producer.numSent++;
}
producer->poll(delay_us / 1000);
watchdog_kick();
}
run = true;
while (run && producer->outq_len() > 0) {
std::cerr << now() << ": Waiting for " << producer->outq_len() << std::endl;
producer->poll(50);
watchdog_kick();
}
std::cerr << now() << ": " << state.producer.numAcked << "/" <<
state.producer.numSent << "/" << state.maxMessages <<
" msgs acked/sent/max, " << state.producer.numErr <<
" errored" << std::endl;
delete topic;
delete producer;
} else if (mode == "C") {
/*
* Consumer mode
*/
tconf->set("auto.offset.reset", "smallest", errstr);
/* Set default topic config */
conf->set("default_topic_conf", tconf, errstr);
ExampleRebalanceCb ex_rebalance_cb;
conf->set("rebalance_cb", &ex_rebalance_cb, errstr);
ExampleOffsetCommitCb ex_offset_commit_cb;
conf->set("offset_commit_cb", &ex_offset_commit_cb, errstr);
/*
* Create consumer using accumulated global configuration.
*/
consumer = RdKafka::KafkaConsumer::create(conf, errstr);
if (!consumer) {
std::cerr << now() << ": Failed to create consumer: " <<
errstr << std::endl;
exit(1);
}
std::cerr << now() << ": % Created consumer " << consumer->name() <<
std::endl;
/*
* Subscribe to topic(s)
*/
RdKafka::ErrorCode resp = consumer->subscribe(topics);
if (resp != RdKafka::ERR_NO_ERROR) {
std::cerr << now() << ": Failed to subscribe to " << topics.size() << " topics: "
<< RdKafka::err2str(resp) << std::endl;
exit(1);
}
/*
* Consume messages
*/
while (run) {
RdKafka::Message *msg = consumer->consume(500);
msg_consume(consumer, msg, NULL);
delete msg;
watchdog_kick();
}
/* Final commit */
do_commit(consumer, 1);
/*
* Stop consumer
*/
consumer->close();
delete consumer;
}
/*
* Wait for RdKafka to decommission.
* This is not strictly needed (when check outq_len() above), but
* allows RdKafka to clean up all its resources before the application
* exits so that memory profilers such as valgrind wont complain about
* memory leaks.
*/
RdKafka::wait_destroyed(5000);
std::cerr << now() << ": EXITING WITH RETURN VALUE 0" << std::endl;
return 0;
}
int main (int argc, char **argv) {
std::string brokers = "localhost";
std::string errstr;
std::string topic_str;
std::string mode;
std::string debug;
int32_t partition = RdKafka::Topic::PARTITION_UA;
int64_t start_offset = RdKafka::Topic::OFFSET_BEGINNING;
bool do_conf_dump = false;
int opt;
MyHashPartitionerCb hash_partitioner;
int use_ccb = 0;
/*
* Create configuration objects
*/
RdKafka::Conf *conf = RdKafka::Conf::create(RdKafka::Conf::CONF_GLOBAL);
RdKafka::Conf *tconf = RdKafka::Conf::create(RdKafka::Conf::CONF_TOPIC);
while ((opt = getopt(argc, argv, "PCLt:p:b:z:qd:o:eX:AM:f:")) != -1) {
switch (opt) {
case 'P':
case 'C':
case 'L':
mode = opt;
break;
case 't':
topic_str = optarg;
break;
case 'p':
if (!strcmp(optarg, "random"))
/* default */;
else if (!strcmp(optarg, "hash")) {
if (tconf->set("partitioner_cb", &hash_partitioner, errstr) !=
RdKafka::Conf::CONF_OK) {
std::cerr << errstr << std::endl;
exit(1);
}
} else
partition = std::atoi(optarg);
break;
case 'b':
brokers = optarg;
break;
case 'z':
if (conf->set("compression.codec", optarg, errstr) !=
RdKafka::Conf::CONF_OK) {
std::cerr << errstr << std::endl;
exit(1);
}
break;
case 'o':
if (!strcmp(optarg, "end"))
start_offset = RdKafka::Topic::OFFSET_END;
else if (!strcmp(optarg, "beginning"))
start_offset = RdKafka::Topic::OFFSET_BEGINNING;
else if (!strcmp(optarg, "stored"))
start_offset = RdKafka::Topic::OFFSET_STORED;
else
start_offset = strtoll(optarg, NULL, 10);
break;
case 'e':
exit_eof = true;
break;
case 'd':
debug = optarg;
break;
case 'M':
if (conf->set("statistics.interval.ms", optarg, errstr) !=
RdKafka::Conf::CONF_OK) {
std::cerr << errstr << std::endl;
exit(1);
}
break;
case 'X':
{
char *name, *val;
if (!strcmp(optarg, "dump")) {
do_conf_dump = true;
continue;
}
name = optarg;
if (!(val = strchr(name, '='))) {
std::cerr << "%% Expected -X property=value, not " <<
name << std::endl;
exit(1);
}
*val = '\0';
val++;
/* Try "topic." prefixed properties on topic
* conf first, and then fall through to global if
* it didnt match a topic configuration property. */
RdKafka::Conf::ConfResult res;
if (!strncmp(name, "topic.", strlen("topic.")))
res = tconf->set(name+strlen("topic."), val, errstr);
else
res = conf->set(name, val, errstr);
if (res != RdKafka::Conf::CONF_OK) {
std::cerr << errstr << std::endl;
exit(1);
}
}
break;
case 'f':
if (!strcmp(optarg, "ccb"))
use_ccb = 1;
else {
std::cerr << "Unknown option: " << optarg << std::endl;
exit(1);
}
break;
default:
goto usage;
}
}
if (mode.empty() || (topic_str.empty() && mode != "L") || optind != argc) {
usage:
std::string features;
conf->get("builtin.features", features);
fprintf(stderr,
"Usage: %s [-C|-P] -t <topic> "
"[-p <partition>] [-b <host1:port1,host2:port2,..>]\n"
"\n"
"librdkafka version %s (0x%08x, builtin.features \"%s\")\n"
"\n"
" Options:\n"
" -C | -P Consumer or Producer mode\n"
" -L Metadata list mode\n"
" -t <topic> Topic to fetch / produce\n"
" -p <num> Partition (random partitioner)\n"
" -p <func> Use partitioner:\n"
" random (default), hash\n"
" -b <brokers> Broker address (localhost:9092)\n"
" -z <codec> Enable compression:\n"
" none|gzip|snappy\n"
" -o <offset> Start offset (consumer)\n"
" -e Exit consumer when last message\n"
" in partition has been received.\n"
" -d [facs..] Enable debugging contexts:\n"
" %s\n"
" -M <intervalms> Enable statistics\n"
" -X <prop=name> Set arbitrary librdkafka "
"configuration property\n"
" Properties prefixed with \"topic.\" "
"will be set on topic object.\n"
" Use '-X list' to see the full list\n"
" of supported properties.\n"
" -f <flag> Set option:\n"
" ccb - use consume_callback\n"
"\n"
" In Consumer mode:\n"
" writes fetched messages to stdout\n"
" In Producer mode:\n"
" reads messages from stdin and sends to broker\n"
"\n"
"\n"
"\n",
argv[0],
RdKafka::version_str().c_str(), RdKafka::version(),
features.c_str(),
RdKafka::get_debug_contexts().c_str());
exit(1);
}
/*
* Set configuration properties
*/
conf->set("metadata.broker.list", brokers, errstr);
if (!debug.empty()) {
if (conf->set("debug", debug, errstr) != RdKafka::Conf::CONF_OK) {
std::cerr << errstr << std::endl;
exit(1);
}
}
ExampleEventCb ex_event_cb;
conf->set("event_cb", &ex_event_cb, errstr);
if (do_conf_dump) {
int pass;
for (pass = 0 ; pass < 2 ; pass++) {
std::list<std::string> *dump;
if (pass == 0) {
dump = conf->dump();
std::cout << "# Global config" << std::endl;
} else {
dump = tconf->dump();
std::cout << "# Topic config" << std::endl;
}
for (std::list<std::string>::iterator it = dump->begin();
it != dump->end(); ) {
std::cout << *it << " = ";
it++;
std::cout << *it << std::endl;
it++;
}
std::cout << std::endl;
}
exit(0);
}
signal(SIGINT, sigterm);
signal(SIGTERM, sigterm);
if (mode == "P") {
/*
* Producer mode
*/
if(topic_str.empty())
goto usage;
ExampleDeliveryReportCb ex_dr_cb;
/* Set delivery report callback */
conf->set("dr_cb", &ex_dr_cb, errstr);
/*
* Create producer using accumulated global configuration.
*/
RdKafka::Producer *producer = RdKafka::Producer::create(conf, errstr);
if (!producer) {
std::cerr << "Failed to create producer: " << errstr << std::endl;
exit(1);
}
std::cout << "% Created producer " << producer->name() << std::endl;
/*
* Create topic handle.
*/
RdKafka::Topic *topic = RdKafka::Topic::create(producer, topic_str,
tconf, errstr);
if (!topic) {
std::cerr << "Failed to create topic: " << errstr << std::endl;
exit(1);
}
/*
* Read messages from stdin and produce to broker.
*/
for (std::string line; run && std::getline(std::cin, line);) {
if (line.empty()) {
producer->poll(0);
continue;
}
/*
* Produce message
*/
RdKafka::ErrorCode resp =
producer->produce(topic, partition,
RdKafka::Producer::RK_MSG_COPY /* Copy payload */,
const_cast<char *>(line.c_str()), line.size(),
NULL, NULL);
if (resp != RdKafka::ERR_NO_ERROR)
std::cerr << "% Produce failed: " <<
RdKafka::err2str(resp) << std::endl;
else
std::cerr << "% Produced message (" << line.size() << " bytes)" <<
std::endl;
producer->poll(0);
}
run = true;
while (run && producer->outq_len() > 0) {
std::cerr << "Waiting for " << producer->outq_len() << std::endl;
producer->poll(1000);
}
delete topic;
delete producer;
} else if (mode == "C") {
/*
* Consumer mode
*/
if(topic_str.empty())
goto usage;
/*
* Create consumer using accumulated global configuration.
*/
RdKafka::Consumer *consumer = RdKafka::Consumer::create(conf, errstr);
if (!consumer) {
std::cerr << "Failed to create consumer: " << errstr << std::endl;
exit(1);
}
std::cout << "% Created consumer " << consumer->name() << std::endl;
/*
* Create topic handle.
*/
RdKafka::Topic *topic = RdKafka::Topic::create(consumer, topic_str,
tconf, errstr);
if (!topic) {
std::cerr << "Failed to create topic: " << errstr << std::endl;
exit(1);
}
/*
* Start consumer for topic+partition at start offset
*/
RdKafka::ErrorCode resp = consumer->start(topic, partition, start_offset);
if (resp != RdKafka::ERR_NO_ERROR) {
std::cerr << "Failed to start consumer: " <<
RdKafka::err2str(resp) << std::endl;
exit(1);
}
ExampleConsumeCb ex_consume_cb;
/*
* Consume messages
*/
while (run) {
if (use_ccb) {
consumer->consume_callback(topic, partition, 1000,
&ex_consume_cb, &use_ccb);
} else {
RdKafka::Message *msg = consumer->consume(topic, partition, 1000);
msg_consume(msg, NULL);
delete msg;
}
consumer->poll(0);
}
/*
* Stop consumer
*/
consumer->stop(topic, partition);
consumer->poll(1000);
delete topic;
delete consumer;
} else {
/* Metadata mode */
/*
* Create producer using accumulated global configuration.
*/
RdKafka::Producer *producer = RdKafka::Producer::create(conf, errstr);
if (!producer) {
std::cerr << "Failed to create producer: " << errstr << std::endl;
exit(1);
}
std::cout << "% Created producer " << producer->name() << std::endl;
/*
* Create topic handle.
*/
RdKafka::Topic *topic = NULL;
if(!topic_str.empty()) {
topic = RdKafka::Topic::create(producer, topic_str, tconf, errstr);
if (!topic) {
std::cerr << "Failed to create topic: " << errstr << std::endl;
exit(1);
}
}
while (run) {
class RdKafka::Metadata *metadata;
/* Fetch metadata */
RdKafka::ErrorCode err = producer->metadata(topic!=NULL, topic,
&metadata, 5000);
if (err != RdKafka::ERR_NO_ERROR) {
std::cerr << "%% Failed to acquire metadata: "
<< RdKafka::err2str(err) << std::endl;
run = 0;
break;
}
metadata_print(topic_str, metadata);
delete metadata;
run = 0;
}
}
/*
* Wait for RdKafka to decommission.
* This is not strictly needed (when check outq_len() above), but
* allows RdKafka to clean up all its resources before the application
* exits so that memory profilers such as valgrind wont complain about
* memory leaks.
*/
RdKafka::wait_destroyed(5000);
return 0;
}