homework-jianmu/utils/test/c/tmq_td32526.c

/*
 * 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 "cJSON.h"
#include "taos.h"
#include "tmsg.h"
#include "types.h"

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() {
  tmq_conf_t* conf = tmq_conf_new();
  tmq_conf_set(conf, "group.id", "g1");
  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, "auto.offset.reset", "earliest");
  tmq_conf_set(conf, "msg.consume.excluded", "1");

  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, "db_5466_topic");
  return topic_list;
}

int printRow(char *str, TAOS_ROW row, TAOS_FIELD *fields, int numFields) {
  int  len = 0;
  char split = ' ';

  for (int i = 0; i < numFields; ++i) {
    if (i > 0) {
      str[len++] = split;
    }

    if (row[i] == NULL) {
      len += sprintf(str + len, "%s", "NULL");
      continue;
    }

    switch (fields[i].type) {
      case TSDB_DATA_TYPE_TINYINT:
        len += sprintf(str + len, "%d", *((int8_t *)row[i]));
        break;

      case TSDB_DATA_TYPE_UTINYINT:
        len += sprintf(str + len, "%u", *((uint8_t *)row[i]));
        break;

      case TSDB_DATA_TYPE_SMALLINT:
        len += sprintf(str + len, "%d", *((int16_t *)row[i]));
        break;

      case TSDB_DATA_TYPE_USMALLINT:
        len += sprintf(str + len, "%u", *((uint16_t *)row[i]));
        break;

      case TSDB_DATA_TYPE_INT:
        len += sprintf(str + len, "%d", *((int32_t *)row[i]));
        break;

      case TSDB_DATA_TYPE_UINT:
        len += sprintf(str + len, "%u", *((uint32_t *)row[i]));
        break;

      case TSDB_DATA_TYPE_BIGINT:
        len += sprintf(str + len, "%" PRId64, *((int64_t *)row[i]));
        break;

      case TSDB_DATA_TYPE_UBIGINT:
        len += sprintf(str + len, "%" PRIu64, *((uint64_t *)row[i]));
        break;

      case TSDB_DATA_TYPE_FLOAT: {
        float fv = 0;
        fv = GET_FLOAT_VAL(row[i]);
        len += sprintf(str + len, "%f", fv);
      } break;

      case TSDB_DATA_TYPE_DOUBLE: {
        double dv = 0;
        dv = GET_DOUBLE_VAL(row[i]);
        len += sprintf(str + len, "%lf", dv);
      } break;

      case TSDB_DATA_TYPE_BINARY:
      case TSDB_DATA_TYPE_VARBINARY:
      case TSDB_DATA_TYPE_NCHAR:
      case TSDB_DATA_TYPE_GEOMETRY: {
        int32_t charLen = varDataLen((char *)row[i] - VARSTR_HEADER_SIZE);
        memcpy(str + len, row[i], charLen);
        len += charLen;
      } break;

      case TSDB_DATA_TYPE_TIMESTAMP:
        len += sprintf(str + len, "%" PRId64, *((int64_t *)row[i]));
        break;

      case TSDB_DATA_TYPE_BOOL:
        len += sprintf(str + len, "%d", *((int8_t *)row[i]));
      default:
        break;
    }
  }

  return len;
}

/**
 * @brief print column name and values of each row
 *
 * @param res
 * @return int
 */
static int printResult(TAOS_RES *res) {
  TAOS_ROW row = NULL;
  int32_t cnt = 0;
  while ((row = taos_fetch_row(res))) {

    int         numFields = taos_num_fields(res);
    TAOS_FIELD *fields = taos_fetch_fields(res);
    char        header[256] = {0};
    int len = 0;
    for (int i = 0; i < numFields; ++i) {
      len += sprintf(header + len, "%s ", fields[i].name);
    }
    puts(header);

    char temp[1024] = {0};
    printRow(temp, row, fields, numFields);
    if (cnt == 0){
      ASSERT(strcmp(temp, "1538721485000 10.300000 219 0.310000 NULL NULL California.SanFrancisco 2") == 0);
    }else if(cnt == 1){
      ASSERT(strcmp(temp, "1538807885000 10.300000 219 0.310000 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 1 California.SanFrancisco 2") == 0);
    }
    cnt++;
  }
  return 0;
}

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 (1) {
    TAOS_RES* tmqmessage = tmq_consumer_poll(tmq, 5000);
    if (tmqmessage) {
      cnt++;
      printResult(tmqmessage);
      taos_free_result(tmqmessage);
    } else {
      break;
    }
  }

  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[]) {
  tmq_t*      tmq = build_consumer();
  tmq_list_t* topic_list = build_topic_list();
  basic_consume_loop(tmq, topic_list);
  tmq_list_destroy(topic_list);
}