Shulou(Shulou.com)06/01 Report--

This article introduces the knowledge of "how to use C language and java to achieve kafka avro producers and consumers". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Original data format

Request IP reply IP domain name type

3183375114 3729673322 "mx.hc.spdrb.com" A

The above data are the contents of the test file

Schema is defined as follows

{

"type": "record"

"name": "data"

"fields":

[

{"name": "qip", "type": "long"}

{"name": "aip", "type": "long"}

{"name": "domain", "type": "string"}

{"name": "type", "type": "string"}

]

}

The C language producer code is as follows

# include # include "avro.h" # include "producer.h" const char PERSON_SCHEMA [] = "{" type ":" record "," name ":" data "," fields ": [{" name ":" qip "," type ":" long "}, {" name ":" aip "," type ":" long "}, {" name ":" domain "," type ":" string "}, {" name ":" type "," type ":" string "}}" Const char * file = "avro_file.dat"; const char * brokers = "xxxxx:9092"; const char * topic = "topic1"; void print_avro_value (avro_value_t * value) {char * json; if (! avro_value_to_json (value, 1, & json)) {printf ("% s\ n", json); free (json) }} if (avro_schema_from_json (PERSON_SCHEMA, sizeof (PERSON_SCHEMA), & test_schema, & error) {fprintf (stderr, "schema error\ n"); exit (EXIT_FAILURE);} return test_schema;avro_schema_t init_schema () {avro_schema_t test_schema;avro_schema_ error_t error } void add_data (avro_writer_t writer, avro_schema_t schema, int64_t qip, uint64_t aip, const char* domain, const char* type) {avro_datum_t data = avro_record (schema); avro_datum_t dqip = avro_int64 (qip); avro_datum_t daip = avro_int64 (aip); avro_datum_t ddomain = avro_string (domain); avro_datum_t dtype = avro_string (type) Avro_record_set (data, qip, dqip); avro_record_set (data, "aip", daip); avro_record_set (data, "domain", ddomain); avro_record_set (data, "type", dtype); avro_write_data (writer, NULL, F2C); avro_datum_decref (dqip); avro_datum_decref (daip); avro_datum_decref (ddomain); avro_datum_decref (dtype) Avro_datum_decref (data);} int main (int argc, char* argv []) {int len = 0; avro_schema_t schema; avro_writer_t mem_writer; char buf [1024]; char tmp [4] [500] = {{0x00}}; FILE * fp = fopen ("test", "r"); if (! fp) {printf ("open test file error!\ n"); return-1 } schema = init_schema (); mem_writer = avro_writer_memory (buf, 1024); while (fgets (buf, 1024 buf)! = NULL) {if (BUF [strlen (buf)] ='\ n') BUF [strlen (buf)] ='\ 0mm; if (sscanf (buf, "% s%s%s%s", tmp [0], tmp [1], tmp [2], tmp [3])! = 4) continue Add_data (mem_writer,schema,atol (tmp [0]), atol (tmp [1]), tmp [2], tmp [3]); printf ("data len =% ld\ n", avro_writer_tell (mem_writer)); len = avro_writer_tell (mem_writer); kafka_putdata (buf, len,brokers,topic) / / the producer code implemented by librdkafka does not list memset (tmp, 0x00, sizeof (tmp)); memset (buf, 0x00, sizeof (buf)); avro_writer_reset (mem_writer);} fclose (fp); avro_writer_free (mem_writer); return 0;}

The consumers implemented in C language are as follows

# include "consumer.h" # include "avro.h" # include # include const char * brokers = "xxxx:9092"; const char * topic = "topic1"; const char * group = "avrotest" Const char PERSON_SCHEMA [] = "{" type ":" record "," name ":" data "," fields ": [{" name ":" qip "," type ":" long "}, {" name ":" aip "," type ":" long "}, {" name ":" domain "," type ":" string "}, {" name ":" type "," type ":" string "]}"; avro_schema_t init_schema () {avro_schema_t test_schema " Avro_schema_error_t error; if (avro_schema_from_json (PERSON_SCHEMA, sizeof (PERSON_SCHEMA), & test_schema, & error) {fprintf (stderr, "schema error\ n"); exit (EXIT_FAILURE);} return test_schema;} void print_data (avro_reader_t reader, avro_schema_t schema) {avro_datum_t data If (avro_read_data (reader, schema, schema, & data) = = 0) {int64_t qip; int64_t aip; char * domain; char * type; avro_datum_t qenddatum direction; avro_record_get (data, qip, & q_datum); avro_int64_get (q_datum, & qip) Avro_record_get (data, aip, & a_datum); avro_int64_get (a_datum, & aip); avro_record_get (data, "domain", & d_datum); avro_string_get (d_datum, & domain); avro_record_get (data, "type", & t_datum); avro_string_get (t_datum, & type) Printf ("qip:% lld, aip:% lld,domain:% s\ n", qip,aip,domain,type); avro_datum_decref (data);} int main (int argc, char* argv []) {rd_kafka_t * rk; rd_kafka_topic_partition_list_t * topics; if (initKafka (& rk, brokers, group, topic, & topics)

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