From 738909ff6b75c03529277516c1380a1a4bf070c7 Mon Sep 17 00:00:00 2001 From: plum-lihui Date: Fri, 5 Aug 2022 18:58:57 +0800 Subject: [PATCH] test: modify tmq example code for doc --- examples/c/tmq.c | 760 ++++++++++++++++++----------------------------- 1 file changed, 287 insertions(+), 473 deletions(-) diff --git a/examples/c/tmq.c b/examples/c/tmq.c index 3686251b4b..1cdd4c02da 100644 --- a/examples/c/tmq.c +++ b/examples/c/tmq.c @@ -1,473 +1,287 @@ -/* - * Copyright (c) 2019 TAOS Data, Inc. - * - * This program is free software: you can use, redistribute, and/or modify - * it under the terms of the GNU Affero General Public License, version 3 - * or later ("AGPL"), as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see . - */ - -#include -#include -#include -#include -#include -#include "taos.h" - -static int running = 1; -static void msg_process(TAOS_RES* msg) { - char buf[1024]; - /*memset(buf, 0, 1024);*/ - printf("topic: %s\n", tmq_get_topic_name(msg)); - printf("db: %s\n", tmq_get_db_name(msg)); - printf("vg: %d\n", tmq_get_vgroup_id(msg)); - if (tmq_get_res_type(msg) == TMQ_RES_TABLE_META) { - tmq_raw_data raw = {0}; - int32_t code = tmq_get_raw(msg, &raw); - if (code == 0) { - TAOS* pConn = taos_connect("192.168.1.86", "root", "taosdata", NULL, 0); - if (pConn == NULL) { - return; - } - - TAOS_RES* pRes = taos_query(pConn, "create database if not exists abc1 vgroups 5"); - if (taos_errno(pRes) != 0) { - printf("error in create db, reason:%s\n", taos_errstr(pRes)); - return; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "use abc1"); - if (taos_errno(pRes) != 0) { - printf("error in use db, reason:%s\n", taos_errstr(pRes)); - return; - } - taos_free_result(pRes); - - int32_t ret = tmq_write_raw(pConn, raw); - printf("write raw data: %s\n", tmq_err2str(ret)); - taos_close(pConn); - } - char* result = tmq_get_json_meta(msg); - if (result) { - printf("meta result: %s\n", result); - } - tmq_free_json_meta(result); - return; - } - while (1) { - TAOS_ROW row = taos_fetch_row(msg); - if (row == NULL) break; - TAOS_FIELD* fields = taos_fetch_fields(msg); - int32_t numOfFields = taos_field_count(msg); - taos_print_row(buf, row, fields, numOfFields); - printf("%s\n", buf); - - const char* tbName = tmq_get_table_name(msg); - if (tbName) { - printf("from tb: %s\n", tbName); - } - } -} - -int32_t init_env() { - TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0); - if (pConn == NULL) { - return -1; - } - - TAOS_RES* pRes = taos_query(pConn, "create database if not exists abc1 vgroups 5"); - if (taos_errno(pRes) != 0) { - printf("error in create db, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "use abc1"); - if (taos_errno(pRes) != 0) { - printf("error in use db, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, - "create stable if not exists st1 (ts timestamp, c1 int, c2 float, c3 binary(16)) tags(t1 int, t3 " - "nchar(8), t4 bool)"); - if (taos_errno(pRes) != 0) { - printf("failed to create super table st1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "create table if not exists ct0 using st1 tags(1000, \"ttt\", true)"); - if (taos_errno(pRes) != 0) { - printf("failed to create child table tu1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "insert into ct0 values(now, 1, 2, 'a')"); - if (taos_errno(pRes) != 0) { - printf("failed to insert into ct0, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "create table if not exists ct1 using st1(t1) tags(2000)"); - if (taos_errno(pRes) != 0) { - printf("failed to create child table ct1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "create table if not exists ct2 using st1(t1) tags(NULL)"); - if (taos_errno(pRes) != 0) { - printf("failed to create child table ct2, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "insert into ct1 values(now, 3, 4, 'b')"); - if (taos_errno(pRes) != 0) { - printf("failed to insert into ct1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "create table if not exists ct3 using st1(t1) tags(3000)"); - if (taos_errno(pRes) != 0) { - printf("failed to create child table ct3, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "insert into ct3 values(now, 5, 6, 'c')"); - if (taos_errno(pRes) != 0) { - printf("failed to insert into ct3, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - -#if 0 - pRes = taos_query(pConn, "alter table st1 add column c4 bigint"); - if (taos_errno(pRes) != 0) { - printf("failed to alter super table st1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "alter table st1 modify column c3 binary(64)"); - if (taos_errno(pRes) != 0) { - printf("failed to alter super table st1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "alter table st1 add tag t2 binary(64)"); - if (taos_errno(pRes) != 0) { - printf("failed to alter super table st1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "alter table ct3 set tag t1=5000"); - if (taos_errno(pRes) != 0) { - printf("failed to slter child table ct3, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "drop table ct3 ct1"); - if (taos_errno(pRes) != 0) { - printf("failed to drop child table ct3, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "drop table st1"); - if (taos_errno(pRes) != 0) { - printf("failed to drop super table st1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "create table if not exists n1(ts timestamp, c1 int, c2 nchar(4))"); - if (taos_errno(pRes) != 0) { - printf("failed to create normal table n1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "alter table n1 add column c3 bigint"); - if (taos_errno(pRes) != 0) { - printf("failed to alter normal table n1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "alter table n1 modify column c2 nchar(8)"); - if (taos_errno(pRes) != 0) { - printf("failed to alter normal table n1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "alter table n1 rename column c3 cc3"); - if (taos_errno(pRes) != 0) { - printf("failed to alter normal table n1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "alter table n1 comment 'hello'"); - if (taos_errno(pRes) != 0) { - printf("failed to alter normal table n1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "alter table n1 drop column c1"); - if (taos_errno(pRes) != 0) { - printf("failed to alter normal table n1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "drop table n1"); - if (taos_errno(pRes) != 0) { - printf("failed to drop normal table n1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "create table jt(ts timestamp, i int) tags(t json)"); - if (taos_errno(pRes) != 0) { - printf("failed to create super table jt, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "create table jt1 using jt tags('{\"k1\":1, \"k2\":\"hello\"}')"); - if (taos_errno(pRes) != 0) { - printf("failed to create super table jt, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "create table jt2 using jt tags('')"); - if (taos_errno(pRes) != 0) { - printf("failed to create super table jt2, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, - "create stable if not exists st1 (ts timestamp, c1 int, c2 float, c3 binary(16)) tags(t1 int, t3 " - "nchar(8), t4 bool)"); - if (taos_errno(pRes) != 0) { - printf("failed to create super table st1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "drop table st1"); - if (taos_errno(pRes) != 0) { - printf("failed to drop super table st1, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); -#endif - - return 0; -} - -int32_t create_topic() { - printf("create topic\n"); - TAOS_RES* pRes; - TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0); - if (pConn == NULL) { - return -1; - } - - pRes = taos_query(pConn, "use abc1"); - if (taos_errno(pRes) != 0) { - printf("error in use db, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - // pRes = taos_query(pConn, "create topic topic_ctb_column with meta as database abc1"); - pRes = taos_query(pConn, "create topic topic_ctb_column as select ts, c1, c2, c3 from st1"); - if (taos_errno(pRes) != 0) { - printf("failed to create topic topic_ctb_column, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - - pRes = taos_query(pConn, "create topic topic2 as select ts, c1, c2, c3 from st1"); - if (taos_errno(pRes) != 0) { - printf("failed to create topic topic_ctb_column, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - -#if 0 - pRes = taos_query(pConn, "insert into tu1 values(now, 1, 1.0, 'bi1')"); - if (taos_errno(pRes) != 0) { - printf("failed to insert, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - pRes = taos_query(pConn, "insert into tu1 values(now+1d, 1, 1.0, 'bi1')"); - if (taos_errno(pRes) != 0) { - printf("failed to insert, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - pRes = taos_query(pConn, "insert into tu2 values(now, 2, 2.0, 'bi2')"); - if (taos_errno(pRes) != 0) { - printf("failed to insert, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); - pRes = taos_query(pConn, "insert into tu2 values(now+1d, 2, 2.0, 'bi2')"); - if (taos_errno(pRes) != 0) { - printf("failed to insert, reason:%s\n", taos_errstr(pRes)); - return -1; - } - taos_free_result(pRes); -#endif - - taos_close(pConn); - return 0; -} - -void tmq_commit_cb_print(tmq_t* tmq, int32_t code, void* param) { - printf("commit %d tmq %p param %p\n", code, tmq, param); -} - -tmq_t* build_consumer() { -#if 0 - TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0); - assert(pConn != NULL); - - TAOS_RES* pRes = taos_query(pConn, "use abc1"); - if (taos_errno(pRes) != 0) { - printf("error in use db, reason:%s\n", taos_errstr(pRes)); - } - taos_free_result(pRes); -#endif - - tmq_conf_t* conf = tmq_conf_new(); - tmq_conf_set(conf, "group.id", "tg2"); - tmq_conf_set(conf, "client.id", "my app 1"); - tmq_conf_set(conf, "td.connect.user", "root"); - tmq_conf_set(conf, "td.connect.pass", "taosdata"); - tmq_conf_set(conf, "msg.with.table.name", "true"); - tmq_conf_set(conf, "enable.auto.commit", "true"); - - /*tmq_conf_set(conf, "experimental.snapshot.enable", "true");*/ - - tmq_conf_set_auto_commit_cb(conf, tmq_commit_cb_print, NULL); - tmq_t* tmq = tmq_consumer_new(conf, NULL, 0); - assert(tmq); - tmq_conf_destroy(conf); - return tmq; -} - -tmq_list_t* build_topic_list() { - tmq_list_t* topic_list = tmq_list_new(); - tmq_list_append(topic_list, "topic_ctb_column"); - /*tmq_list_append(topic_list, "tmq_test_db_multi_insert_topic");*/ - return topic_list; -} - -void basic_consume_loop(tmq_t* tmq, tmq_list_t* topics) { - int32_t code; - - if ((code = tmq_subscribe(tmq, topics))) { - fprintf(stderr, "%% Failed to start consuming topics: %s\n", tmq_err2str(code)); - printf("subscribe err\n"); - return; - } - int32_t cnt = 0; - while (running) { - TAOS_RES* tmqmessage = tmq_consumer_poll(tmq, -1); - if (tmqmessage) { - cnt++; - msg_process(tmqmessage); - /*if (cnt >= 2) break;*/ - /*printf("get data\n");*/ - taos_free_result(tmqmessage); - /*} else {*/ - /*break;*/ - /*tmq_commit_sync(tmq, NULL);*/ - } - } - - code = tmq_consumer_close(tmq); - if (code) - fprintf(stderr, "%% Failed to close consumer: %s\n", tmq_err2str(code)); - else - fprintf(stderr, "%% Consumer closed\n"); -} - -void sync_consume_loop(tmq_t* tmq, tmq_list_t* topics) { - static const int MIN_COMMIT_COUNT = 1; - - int msg_count = 0; - int32_t code; - - if ((code = tmq_subscribe(tmq, topics))) { - fprintf(stderr, "%% Failed to start consuming topics: %s\n", tmq_err2str(code)); - return; - } - - tmq_list_t* subList = NULL; - tmq_subscription(tmq, &subList); - char** subTopics = tmq_list_to_c_array(subList); - int32_t sz = tmq_list_get_size(subList); - printf("subscribed topics: "); - for (int32_t i = 0; i < sz; i++) { - printf("%s, ", subTopics[i]); - } - printf("\n"); - tmq_list_destroy(subList); - - while (running) { - TAOS_RES* tmqmessage = tmq_consumer_poll(tmq, 1000); - if (tmqmessage) { - msg_process(tmqmessage); - taos_free_result(tmqmessage); - - /*tmq_commit_sync(tmq, NULL);*/ - /*if ((++msg_count % MIN_COMMIT_COUNT) == 0) tmq_commit(tmq, NULL, 0);*/ - } - } - - code = tmq_consumer_close(tmq); - if (code) - fprintf(stderr, "%% Failed to close consumer: %s\n", tmq_err2str(code)); - else - fprintf(stderr, "%% Consumer closed\n"); -} - -int main(int argc, char* argv[]) { - if (argc > 1) { - printf("env init\n"); - if (init_env() < 0) { - return -1; - } - create_topic(); - } - tmq_t* tmq = build_consumer(); - tmq_list_t* topic_list = build_topic_list(); - basic_consume_loop(tmq, topic_list); - /*sync_consume_loop(tmq, topic_list);*/ -} +/* + * Copyright (c) 2019 TAOS Data, Inc. + * + * This program is free software: you can use, redistribute, and/or modify + * it under the terms of the GNU Affero General Public License, version 3 + * or later ("AGPL"), as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include +#include +#include "taos.h" + +static int running = 1; +static char dbName[64] = "tmqdb"; +static char stbName[64] = "stb"; +static char topicName[64] = "topicname"; + +static int32_t msg_process(TAOS_RES* msg) { + char buf[1024]; + int32_t rows = 0; + + const char* topicName = tmq_get_topic_name(msg); + const char* dbName = tmq_get_db_name(msg); + int32_t vgroupId = tmq_get_vgroup_id(msg); + + printf("topic: %s\n", topicName); + printf("db: %s\n", dbName); + printf("vgroup id: %d\n", vgroupId); + + while (1) { + TAOS_ROW row = taos_fetch_row(msg); + if (row == NULL) break; + + TAOS_FIELD* fields = taos_fetch_fields(msg); + int32_t numOfFields = taos_field_count(msg); + int32_t* length = taos_fetch_lengths(msg); + int32_t precision = taos_result_precision(msg); + const char* tbName = tmq_get_table_name(msg); + rows++; + taos_print_row(buf, row, fields, numOfFields); + printf("row content from %s: %s\n", (tbName != NULL ? tbName : "null table"), buf); + } + + return rows; +} + +static int32_t init_env() { + TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0); + if (pConn == NULL) { + return -1; + } + + TAOS_RES* pRes; + // drop database if exists + printf("create database\n"); + pRes = taos_query(pConn, "drop database if exists tmqdb"); + if (taos_errno(pRes) != 0) { + printf("error in drop tmqdb, reason:%s\n", taos_errstr(pRes)); + return -1; + } + taos_free_result(pRes); + + // create database + pRes = taos_query(pConn, "create database tmqdb"); + if (taos_errno(pRes) != 0) { + printf("error in create tmqdb, reason:%s\n", taos_errstr(pRes)); + return -1; + } + taos_free_result(pRes); + + // create super table + printf("create super table\n"); + pRes = taos_query(pConn, "create table tmqdb.stb (ts timestamp, c1 int, c2 float, c3 varchar(16)) tags(t1 int, t3 varchar(16))"); + if (taos_errno(pRes) != 0) { + printf("failed to create super table stb, reason:%s\n", taos_errstr(pRes)); + return -1; + } + taos_free_result(pRes); + + // create sub tables + printf("create sub tables\n"); + pRes = taos_query(pConn, "create table tmqdb.ctb0 using tmqdb.stb tags(0, 'subtable0')"); + if (taos_errno(pRes) != 0) { + printf("failed to create super table ctb0, reason:%s\n", taos_errstr(pRes)); + return -1; + } + taos_free_result(pRes); + + pRes = taos_query(pConn, "create table tmqdb.ctb1 using tmqdb.stb tags(1, 'subtable1')"); + if (taos_errno(pRes) != 0) { + printf("failed to create super table ctb1, reason:%s\n", taos_errstr(pRes)); + return -1; + } + taos_free_result(pRes); + + pRes = taos_query(pConn, "create table tmqdb.ctb2 using tmqdb.stb tags(2, 'subtable2')"); + if (taos_errno(pRes) != 0) { + printf("failed to create super table ctb2, reason:%s\n", taos_errstr(pRes)); + return -1; + } + taos_free_result(pRes); + + pRes = taos_query(pConn, "create table tmqdb.ctb3 using tmqdb.stb tags(3, 'subtable3')"); + if (taos_errno(pRes) != 0) { + printf("failed to create super table ctb3, reason:%s\n", taos_errstr(pRes)); + return -1; + } + taos_free_result(pRes); + + // insert data + printf("insert data into sub tables\n"); + pRes = taos_query(pConn, "insert into tmqdb.ctb0 values(now, 0, 0, 'a0')(now+1s, 0, 0, 'a00')"); + if (taos_errno(pRes) != 0) { + printf("failed to insert into ctb0, reason:%s\n", taos_errstr(pRes)); + return -1; + } + taos_free_result(pRes); + + pRes = taos_query(pConn, "insert into tmqdb.ctb1 values(now, 1, 1, 'a1')(now+1s, 11, 11, 'a11')"); + if (taos_errno(pRes) != 0) { + printf("failed to insert into ctb0, reason:%s\n", taos_errstr(pRes)); + return -1; + } + taos_free_result(pRes); + + pRes = taos_query(pConn, "insert into tmqdb.ctb2 values(now, 2, 2, 'a1')(now+1s, 22, 22, 'a22')"); + if (taos_errno(pRes) != 0) { + printf("failed to insert into ctb0, reason:%s\n", taos_errstr(pRes)); + return -1; + } + taos_free_result(pRes); + + pRes = taos_query(pConn, "insert into tmqdb.ctb3 values(now, 3, 3, 'a1')(now+1s, 33, 33, 'a33')"); + if (taos_errno(pRes) != 0) { + printf("failed to insert into ctb0, reason:%s\n", taos_errstr(pRes)); + return -1; + } + taos_free_result(pRes); + + taos_close(pConn); + return 0; +} + +int32_t create_topic() { + printf("create topic\n"); + TAOS_RES* pRes; + TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0); + if (pConn == NULL) { + return -1; + } + + pRes = taos_query(pConn, "use tmqdb"); + if (taos_errno(pRes) != 0) { + printf("error in use tmqdb, reason:%s\n", taos_errstr(pRes)); + return -1; + } + taos_free_result(pRes); + + // pRes = taos_query(pConn, "create topic topic_ctb_column with meta as database abc1"); + pRes = taos_query(pConn, "create topic topicname as select ts, c1, c2, c3 from tmqdb.stb where c1 > 1"); + if (taos_errno(pRes) != 0) { + printf("failed to create topic topicname, reason:%s\n", taos_errstr(pRes)); + return -1; + } + taos_free_result(pRes); + + taos_close(pConn); + return 0; +} + +void tmq_commit_cb_print(tmq_t* tmq, int32_t code, void* param) { + printf("tmq_commit_cb_print() code: %d, tmq: %p, param: %p\n", code, tmq, param); +} + +tmq_t* build_consumer() { + tmq_conf_res_t code; + tmq_conf_t* conf = tmq_conf_new(); + code = tmq_conf_set(conf, "enable.auto.commit", "true"); + if (TMQ_CONF_OK != code) return NULL; + code = tmq_conf_set(conf, "auto.commit.interval.ms", "1000"); + if (TMQ_CONF_OK != code) return NULL; + code = tmq_conf_set(conf, "group.id", "cgrpName"); + if (TMQ_CONF_OK != code) return NULL; + code = tmq_conf_set(conf, "td.connect.user", "root"); + if (TMQ_CONF_OK != code) return NULL; + code = tmq_conf_set(conf, "td.connect.pass", "taosdata"); + if (TMQ_CONF_OK != code) return NULL; + code = tmq_conf_set(conf, "auto.offset.reset", "earliest"); + if (TMQ_CONF_OK != code) return NULL; + code = tmq_conf_set(conf, "experimental.snapshot.enable", "true"); + if (TMQ_CONF_OK != code) return NULL; + code = tmq_conf_set(conf, "msg.with.table.name", "true"); + if (TMQ_CONF_OK != code) return NULL; + + tmq_conf_set_auto_commit_cb(conf, tmq_commit_cb_print, NULL); + + tmq_t* tmq = tmq_consumer_new(conf, NULL, 0); + tmq_conf_destroy(conf); + return tmq; +} + +tmq_list_t* build_topic_list() { + tmq_list_t* topicList = tmq_list_new(); + int32_t code = tmq_list_append(topicList, "topicname"); + if (code) { + return NULL; + } + return topicList; +} + +void basic_consume_loop(tmq_t* tmq, tmq_list_t* topicList) { + int32_t code; + + if ((code = tmq_subscribe(tmq, topicList))) { + fprintf(stderr, "%% Failed to tmq_subscribe(): %s\n", tmq_err2str(code)); + return; + } + + int32_t totalRows = 0; + int32_t msgCnt = 0; + int32_t consumeDelay = 5000; + while (running) { + TAOS_RES* tmqmsg = tmq_consumer_poll(tmq, consumeDelay); + if (tmqmsg) { + msgCnt++; + totalRows += msg_process(tmqmsg); + taos_free_result(tmqmsg); + } else { + break; + } + } + + fprintf(stderr, "%d msg consumed, include %d rows\n", msgCnt, totalRows); +} + +int main(int argc, char* argv[]) { + int32_t code; + + if (init_env() < 0) { + return -1; + } + + if (create_topic() < 0) { + return -1; + } + + tmq_t* tmq = build_consumer(); + if (NULL == tmq) { + fprintf(stderr, "%% build_consumer() fail!\n"); + return -1; + } + + tmq_list_t* topic_list = build_topic_list(); + if (NULL == topic_list) { + return -1; + } + + basic_consume_loop(tmq, topic_list); + + code = tmq_unsubscribe(tmq); + if (code) { + fprintf(stderr, "%% Failed to unsubscribe: %s\n", tmq_err2str(code)); + } + else { + fprintf(stderr, "%% unsubscribe\n"); + } + + code = tmq_consumer_close(tmq); + if (code) { + fprintf(stderr, "%% Failed to close consumer: %s\n", tmq_err2str(code)); + } + else { + fprintf(stderr, "%% Consumer closed\n"); + } + + return 0; +} -- GitLab