test: modify tmq example code for doc
This commit is contained in:
plum-lihui
parent
e99782f489
commit
738909ff6b
760
examples/c/tmq.c
760
examples/c/tmq.c
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@ -1,473 +1,287 @@
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/*
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* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
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*
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* This program is free software: you can use, redistribute, and/or modify
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* it under the terms of the GNU Affero General Public License, version 3
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* or later ("AGPL"), as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include "taos.h"
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static int running = 1;
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static void msg_process(TAOS_RES* msg) {
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char buf[1024];
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/*memset(buf, 0, 1024);*/
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printf("topic: %s\n", tmq_get_topic_name(msg));
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printf("db: %s\n", tmq_get_db_name(msg));
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printf("vg: %d\n", tmq_get_vgroup_id(msg));
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if (tmq_get_res_type(msg) == TMQ_RES_TABLE_META) {
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tmq_raw_data raw = {0};
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int32_t code = tmq_get_raw(msg, &raw);
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if (code == 0) {
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TAOS* pConn = taos_connect("192.168.1.86", "root", "taosdata", NULL, 0);
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if (pConn == NULL) {
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return;
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}
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TAOS_RES* pRes = taos_query(pConn, "create database if not exists abc1 vgroups 5");
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if (taos_errno(pRes) != 0) {
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printf("error in create db, reason:%s\n", taos_errstr(pRes));
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return;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "use abc1");
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if (taos_errno(pRes) != 0) {
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printf("error in use db, reason:%s\n", taos_errstr(pRes));
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return;
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}
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taos_free_result(pRes);
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int32_t ret = tmq_write_raw(pConn, raw);
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printf("write raw data: %s\n", tmq_err2str(ret));
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taos_close(pConn);
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}
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char* result = tmq_get_json_meta(msg);
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if (result) {
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printf("meta result: %s\n", result);
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}
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tmq_free_json_meta(result);
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return;
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}
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while (1) {
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TAOS_ROW row = taos_fetch_row(msg);
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if (row == NULL) break;
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TAOS_FIELD* fields = taos_fetch_fields(msg);
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int32_t numOfFields = taos_field_count(msg);
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taos_print_row(buf, row, fields, numOfFields);
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printf("%s\n", buf);
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const char* tbName = tmq_get_table_name(msg);
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if (tbName) {
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printf("from tb: %s\n", tbName);
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}
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}
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}
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int32_t init_env() {
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TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
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if (pConn == NULL) {
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return -1;
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}
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TAOS_RES* pRes = taos_query(pConn, "create database if not exists abc1 vgroups 5");
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if (taos_errno(pRes) != 0) {
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printf("error in create db, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "use abc1");
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if (taos_errno(pRes) != 0) {
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printf("error in use db, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn,
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"create stable if not exists st1 (ts timestamp, c1 int, c2 float, c3 binary(16)) tags(t1 int, t3 "
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"nchar(8), t4 bool)");
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if (taos_errno(pRes) != 0) {
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printf("failed to create super table st1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "create table if not exists ct0 using st1 tags(1000, \"ttt\", true)");
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if (taos_errno(pRes) != 0) {
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printf("failed to create child table tu1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "insert into ct0 values(now, 1, 2, 'a')");
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if (taos_errno(pRes) != 0) {
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printf("failed to insert into ct0, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "create table if not exists ct1 using st1(t1) tags(2000)");
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if (taos_errno(pRes) != 0) {
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printf("failed to create child table ct1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "create table if not exists ct2 using st1(t1) tags(NULL)");
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if (taos_errno(pRes) != 0) {
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printf("failed to create child table ct2, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "insert into ct1 values(now, 3, 4, 'b')");
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if (taos_errno(pRes) != 0) {
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printf("failed to insert into ct1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "create table if not exists ct3 using st1(t1) tags(3000)");
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if (taos_errno(pRes) != 0) {
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printf("failed to create child table ct3, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "insert into ct3 values(now, 5, 6, 'c')");
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if (taos_errno(pRes) != 0) {
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printf("failed to insert into ct3, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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#if 0
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pRes = taos_query(pConn, "alter table st1 add column c4 bigint");
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if (taos_errno(pRes) != 0) {
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printf("failed to alter super table st1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "alter table st1 modify column c3 binary(64)");
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if (taos_errno(pRes) != 0) {
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printf("failed to alter super table st1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "alter table st1 add tag t2 binary(64)");
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if (taos_errno(pRes) != 0) {
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printf("failed to alter super table st1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "alter table ct3 set tag t1=5000");
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if (taos_errno(pRes) != 0) {
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printf("failed to slter child table ct3, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "drop table ct3 ct1");
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if (taos_errno(pRes) != 0) {
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printf("failed to drop child table ct3, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "drop table st1");
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if (taos_errno(pRes) != 0) {
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printf("failed to drop super table st1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "create table if not exists n1(ts timestamp, c1 int, c2 nchar(4))");
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if (taos_errno(pRes) != 0) {
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printf("failed to create normal table n1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "alter table n1 add column c3 bigint");
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if (taos_errno(pRes) != 0) {
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printf("failed to alter normal table n1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "alter table n1 modify column c2 nchar(8)");
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if (taos_errno(pRes) != 0) {
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printf("failed to alter normal table n1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "alter table n1 rename column c3 cc3");
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if (taos_errno(pRes) != 0) {
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printf("failed to alter normal table n1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "alter table n1 comment 'hello'");
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if (taos_errno(pRes) != 0) {
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printf("failed to alter normal table n1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "alter table n1 drop column c1");
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if (taos_errno(pRes) != 0) {
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printf("failed to alter normal table n1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "drop table n1");
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if (taos_errno(pRes) != 0) {
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printf("failed to drop normal table n1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "create table jt(ts timestamp, i int) tags(t json)");
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if (taos_errno(pRes) != 0) {
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printf("failed to create super table jt, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "create table jt1 using jt tags('{\"k1\":1, \"k2\":\"hello\"}')");
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if (taos_errno(pRes) != 0) {
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printf("failed to create super table jt, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "create table jt2 using jt tags('')");
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if (taos_errno(pRes) != 0) {
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printf("failed to create super table jt2, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn,
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"create stable if not exists st1 (ts timestamp, c1 int, c2 float, c3 binary(16)) tags(t1 int, t3 "
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"nchar(8), t4 bool)");
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if (taos_errno(pRes) != 0) {
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printf("failed to create super table st1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "drop table st1");
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if (taos_errno(pRes) != 0) {
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printf("failed to drop super table st1, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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#endif
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return 0;
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}
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int32_t create_topic() {
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printf("create topic\n");
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TAOS_RES* pRes;
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TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
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if (pConn == NULL) {
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return -1;
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}
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pRes = taos_query(pConn, "use abc1");
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if (taos_errno(pRes) != 0) {
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printf("error in use db, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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// pRes = taos_query(pConn, "create topic topic_ctb_column with meta as database abc1");
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pRes = taos_query(pConn, "create topic topic_ctb_column as select ts, c1, c2, c3 from st1");
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if (taos_errno(pRes) != 0) {
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printf("failed to create topic topic_ctb_column, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "create topic topic2 as select ts, c1, c2, c3 from st1");
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if (taos_errno(pRes) != 0) {
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printf("failed to create topic topic_ctb_column, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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#if 0
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pRes = taos_query(pConn, "insert into tu1 values(now, 1, 1.0, 'bi1')");
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if (taos_errno(pRes) != 0) {
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printf("failed to insert, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "insert into tu1 values(now+1d, 1, 1.0, 'bi1')");
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if (taos_errno(pRes) != 0) {
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printf("failed to insert, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "insert into tu2 values(now, 2, 2.0, 'bi2')");
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if (taos_errno(pRes) != 0) {
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printf("failed to insert, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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pRes = taos_query(pConn, "insert into tu2 values(now+1d, 2, 2.0, 'bi2')");
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if (taos_errno(pRes) != 0) {
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printf("failed to insert, reason:%s\n", taos_errstr(pRes));
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return -1;
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}
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taos_free_result(pRes);
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#endif
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taos_close(pConn);
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return 0;
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}
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void tmq_commit_cb_print(tmq_t* tmq, int32_t code, void* param) {
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printf("commit %d tmq %p param %p\n", code, tmq, param);
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}
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tmq_t* build_consumer() {
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#if 0
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TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
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assert(pConn != NULL);
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TAOS_RES* pRes = taos_query(pConn, "use abc1");
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if (taos_errno(pRes) != 0) {
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printf("error in use db, reason:%s\n", taos_errstr(pRes));
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}
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taos_free_result(pRes);
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#endif
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tmq_conf_t* conf = tmq_conf_new();
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tmq_conf_set(conf, "group.id", "tg2");
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tmq_conf_set(conf, "client.id", "my app 1");
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tmq_conf_set(conf, "td.connect.user", "root");
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tmq_conf_set(conf, "td.connect.pass", "taosdata");
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tmq_conf_set(conf, "msg.with.table.name", "true");
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tmq_conf_set(conf, "enable.auto.commit", "true");
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/*tmq_conf_set(conf, "experimental.snapshot.enable", "true");*/
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tmq_conf_set_auto_commit_cb(conf, tmq_commit_cb_print, NULL);
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tmq_t* tmq = tmq_consumer_new(conf, NULL, 0);
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assert(tmq);
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tmq_conf_destroy(conf);
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return tmq;
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}
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tmq_list_t* build_topic_list() {
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tmq_list_t* topic_list = tmq_list_new();
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tmq_list_append(topic_list, "topic_ctb_column");
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/*tmq_list_append(topic_list, "tmq_test_db_multi_insert_topic");*/
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return topic_list;
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}
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void basic_consume_loop(tmq_t* tmq, tmq_list_t* topics) {
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int32_t code;
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if ((code = tmq_subscribe(tmq, topics))) {
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fprintf(stderr, "%% Failed to start consuming topics: %s\n", tmq_err2str(code));
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printf("subscribe err\n");
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return;
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}
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int32_t cnt = 0;
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while (running) {
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TAOS_RES* tmqmessage = tmq_consumer_poll(tmq, -1);
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if (tmqmessage) {
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cnt++;
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msg_process(tmqmessage);
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/*if (cnt >= 2) break;*/
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/*printf("get data\n");*/
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taos_free_result(tmqmessage);
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/*} else {*/
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/*break;*/
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/*tmq_commit_sync(tmq, NULL);*/
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}
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}
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code = tmq_consumer_close(tmq);
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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. <jhtao@taosdata.com>
|
||||
*
|
||||
* 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 <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#include <assert.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <time.h>
|
||||
#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;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue