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/*
* librdkafka - Apache Kafka C library
*
* Copyright (c) 2016-2022, 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.
*/
#include <iostream>
#include <cstring>
#include <cstdlib>
#include "testcpp.h"
/**
* Verify that yield() works.
*
* In two iterations, do:
* - Register a DR callback that counts the number of messages and
* calls yield() in iteration 1, and not in iteration 2.
* - Produce 100 messages quickly (to ensure same-batch)
* - Verify that only one DR callback is triggered per poll() call
* in iteration 1, and all messages in iteration 2.
*/
class DrCb0065 : public RdKafka::DeliveryReportCb {
public:
int cnt; // dr messages seen
bool do_yield; // whether to yield for each message or not
RdKafka::Producer *p;
DrCb0065(bool yield) : cnt(0), do_yield(yield), p(NULL) {
}
void dr_cb(RdKafka::Message &message) {
if (message.err())
Test::Fail("DR: message failed: " + RdKafka::err2str(message.err()));
Test::Say(3, tostr() << "DR #" << cnt << "\n");
cnt++;
if (do_yield)
p->yield();
}
};
static void do_test_producer(bool do_yield) {
int msgcnt = 100;
std::string errstr;
RdKafka::ErrorCode err;
std::string topic = Test::mk_topic_name("0065_yield", 1);
/*
* Create Producer
*/
RdKafka::Conf *conf;
Test::conf_init(&conf, NULL, 10);
DrCb0065 dr(do_yield);
conf->set("dr_cb", &dr, errstr);
/* Make sure messages are produced in batches of 100 */
conf->set("batch.num.messages", "100", errstr);
conf->set("linger.ms", "10000", errstr);
RdKafka::Producer *p = RdKafka::Producer::create(conf, errstr);
if (!p)
Test::Fail("Failed to create producer: " + errstr);
delete conf;
dr.p = p;
Test::Say(tostr() << (do_yield ? "Yield: " : "Dont Yield: ") << "Producing "
<< msgcnt << " messages to " << topic << "\n");
for (int i = 0; i < msgcnt; i++) {
err = p->produce(topic, 0, RdKafka::Producer::RK_MSG_COPY, (void *)"hi", 2,
NULL, 0, 0, NULL);
if (err)
Test::Fail("produce() failed: " + RdKafka::err2str(err));
}
int exp_msgs_per_poll = do_yield ? 1 : msgcnt;
while (dr.cnt < msgcnt) {
int pre_cnt = dr.cnt;
p->poll(1000);
int this_dr_cnt = dr.cnt - pre_cnt;
if (this_dr_cnt == 0) {
/* Other callbacks may cause poll() to return early
* before DRs are available, ignore these. */
Test::Say(3, "Zero DRs called, ignoring\n");
continue;
}
if (this_dr_cnt != exp_msgs_per_poll)
Test::Fail(tostr() << "Expected " << exp_msgs_per_poll
<< " DRs per poll() call, got " << this_dr_cnt);
else
Test::Say(3, tostr() << dr.cnt << "/" << msgcnt << "\n");
}
if (dr.cnt != msgcnt)
Test::Fail(tostr() << "Expected " << msgcnt << " DRs, got " << dr.cnt);
Test::Say(tostr() << (do_yield ? "Yield: " : "Dont Yield: ")
<< "Success: " << dr.cnt << " DRs received in batches of "
<< exp_msgs_per_poll << "\n");
delete p;
}
extern "C" {
int main_0065_yield(int argc, char **argv) {
do_test_producer(1 /*yield*/);
do_test_producer(0 /*dont yield*/);
return 0;
}
}
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