//IPC QUEUE 데이타를 읽어 KAFKA에 전송하는경우
//FILE의 데이타를 읽어서 KAFKA에 전송하는경우(아래소스는 여기에 해당)
/*
* librdkafka - Apache Kafka C library
*
* Copyright (c) 2017, 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.
*/
/**
* Simple Apache Kafka producer
* using the Kafka driver from librdkafka
* (https://github.com/edenhill/librdkafka)
*/
#include <stdio.h>
#include <signal.h>
#include <string.h>
/* Typical include path would be <librdkafka/rdkafka.h>, but this program
* is builtin from within the librdkafka source tree and thus differs. */
#include "rdkafka.h"
static int run = 1;
/**
* @brief Signal termination of program
*/
static void stop (int sig) {
run = 0;
fclose(stdin); /* abort fgets() */
}
/**
* @brief Message delivery report callback.
*
* This callback is called exactly once per message, indicating if
* the message was succesfully delivered
* (rkmessage->err == RD_KAFKA_RESP_ERR_NO_ERROR) or permanently
* failed delivery (rkmessage->err != RD_KAFKA_RESP_ERR_NO_ERROR).
*
* The callback is triggered from rd_kafka_poll() and executes on
* the application's thread.
*/
static void dr_msg_cb (rd_kafka_t *rk, const rd_kafka_message_t *rkmessage, void *opaque) {
if (rkmessage->err)
fprintf(stderr, "%% Message delivery failed: %s\n",
rd_kafka_err2str(rkmessage->err));
else
fprintf(stderr,"%% Message delivered (%zd bytes, ""partition %"PRId32")\n",rkmessage->len, rkmessage->partition);
/* The rkmessage is destroyed automatically by librdkafka */
}
int main (int argc, char **argv) {
rd_kafka_t *rk; /* Producer instance handle */
rd_kafka_topic_t *rkt; /* Topic object */
rd_kafka_conf_t *conf; /* Temporary configuration object */
char errstr[512]; /* librdkafka API error reporting buffer */
char buf[512]; /* Message value temporary buffer */
const char *brokers; /* Argument: broker list */
const char *topic; /* Argument: topic to produce to */
FILE *fp=NULL;
/*
* Argument validation
*/
if (argc != 4) {
fprintf(stderr, "%% Usage: %s <broker> <topic> <filename>\n", argv[0]);
return -1;
}
brokers = argv[1]; //127.0.0.1:9092
//1.1 기본적인 topic 생성예제(topic의 이름은 test)
//>bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic test
//1.2 일자별로 topic생성(아래예제는 20180401 ~ 20180431, 4월 날짜별로 topic생성)
//>for ii in `seq 20180401 20180431`; do bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic $ii; done
//3. Step 3: Create a topic
//3.1 Let's create a topic named "test" with a single partition and only one replica:
// for ii in `seq 20180411 20180431`; do bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic $ii; done
//> cd /home1/irteamsu/kafka2/kafka_2.11-1.1.0
//> bin/kafka-server-start.sh config/server.properties
//3.2 TOPIC리스트 확인
//> bin/kafka-topics.sh --list --zookeeper localhost:2181
topic = argv[2]; //YYYYMMDD
if((fp=fopen(argv[3], "rt"))==NULL) return(-1);
/*
* Create Kafka client configuration place-holder
*/
conf = rd_kafka_conf_new();
/* Set bootstrap broker(s) as a comma-separated list of
* host or host:port (default port 9092).
* librdkafka will use the bootstrap brokers to acquire the full
* set of brokers from the cluster. */
if (rd_kafka_conf_set(conf, "bootstrap.servers", brokers,errstr, sizeof(errstr)) != RD_KAFKA_CONF_OK)
{
fprintf(stderr, "%s\n", errstr);
return -1;
}
/* Set the delivery report callback.
* This callback will be called once per message to inform
* the application if delivery succeeded or failed.
* See dr_msg_cb() above. */
rd_kafka_conf_set_dr_msg_cb(conf, dr_msg_cb);
/*
* Create producer instance.
*
* NOTE: rd_kafka_new() takes ownership of the conf object
* and the application must not reference it again after
* this call.
*/
rk = rd_kafka_new(RD_KAFKA_PRODUCER, conf, errstr, sizeof(errstr));
if (!rk) {
fprintf(stderr,
"%% Failed to create new producer: %s\n", errstr);
return -1;
}
/* Create topic object that will be reused for each message
* produced.
*
* Both the producer instance (rd_kafka_t) and topic objects (topic_t)
* are long-lived objects that should be reused as much as possible.
*/
rkt = rd_kafka_topic_new(rk, topic, NULL);
if (!rkt) {
fprintf(stderr, "%% Failed to create topic object: %s\n",
rd_kafka_err2str(rd_kafka_last_error()));
rd_kafka_destroy(rk);
return -1;
}
/* Signal handler for clean shutdown */
signal(SIGINT, stop);
fprintf(stderr,
"%% Type some text and hit enter to produce message\n"
"%% Or just hit enter to only serve delivery reports\n"
"%% Press Ctrl-C or Ctrl-D to exit\n");
while (run)
{
memset(buf, 0x00, sizeof(buf));
if(fgets(buf, sizeof(buf), fp)==NULL) break;
size_t len = strlen(buf);
if (buf[len-1] == '\n') /* Remove newline */
buf[--len] = '\0';
if (len == 0) {
/* Empty line: only serve delivery reports */
rd_kafka_poll(rk, 0/*non-blocking */);
continue;
}
/*
* Send/Produce message.
* This is an asynchronous call, on success it will only
* enqueue the message on the internal producer queue.
* The actual delivery attempts to the broker are handled
* by background threads.
* The previously registered delivery report callback
* (dr_msg_cb) is used to signal back to the application
* when the message has been delivered (or failed).
*/
retry:
if (rd_kafka_produce(
/* Topic object */
rkt,
/* Use builtin partitioner to select partition*/
RD_KAFKA_PARTITION_UA,
/* Make a copy of the payload. */
RD_KAFKA_MSG_F_COPY,
/* Message payload (value) and length */
buf, len,
/* Optional key and its length */
NULL, 0,
/* Message opaque, provided in
* delivery report callback as
* msg_opaque. */
NULL) == -1)
{
/**
* Failed to *enqueue* message for producing.
*/
fprintf(stderr,
"%% Failed to produce to topic %s: %s\n",
rd_kafka_topic_name(rkt),
rd_kafka_err2str(rd_kafka_last_error()));
/* Poll to handle delivery reports */
if (rd_kafka_last_error() ==
RD_KAFKA_RESP_ERR__QUEUE_FULL) {
/* If the internal queue is full, wait for
* messages to be delivered and then retry.
* The internal queue represents both
* messages to be sent and messages that have
* been sent or failed, awaiting their
* delivery report callback to be called.
*
* The internal queue is limited by the
* configuration property
* queue.buffering.max.messages */
rd_kafka_poll(rk, 1000/*block for max 1000ms*/);
goto retry;
}
}
else
{
fprintf(stderr, "%% Enqueued message (%zd bytes) "
"for topic %s\n",
len, rd_kafka_topic_name(rkt));
}
/* A producer application should continually serve
* the delivery report queue by calling rd_kafka_poll()
* at frequent intervals.
* Either put the poll call in your main loop, or in a
* dedicated thread, or call it after every
* rd_kafka_produce() call.
* Just make sure that rd_kafka_poll() is still called
* during periods where you are not producing any messages
* to make sure previously produced messages have their
* delivery report callback served (and any other callbacks
* you register). */
rd_kafka_poll(rk, 0/*non-blocking*/);
}
/* Wait for final messages to be delivered or fail.
* rd_kafka_flush() is an abstraction over rd_kafka_poll() which
* waits for all messages to be delivered.
*/
fprintf(stderr, "%% Flushing final messages..\n");
rd_kafka_flush(rk, 10*1000 /* wait for max 10 seconds */);
/* Destroy topic object */
rd_kafka_topic_destroy(rkt);
/* Destroy the producer instance */
rd_kafka_destroy(rk);
return 0;
}
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