lookup_statistics_counter_by_bucket.h (2333B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2025 Taler Systems SA 4 5 TALER is free software; you can redistribute it and/or modify it under the 6 terms of the GNU General Public License as published by the Free Software 7 Foundation; either version 3, or (at your option) any later version. 8 9 TALER is distributed in the hope that it will be useful, but WITHOUT ANY 10 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR 11 A PARTICULAR PURPOSE. See the GNU General Public License for more details. 12 13 You should have received a copy of the GNU General Public License along with 14 TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> 15 */ 16 /** 17 * @file src/include/merchant-database/lookup_statistics_counter_by_bucket.h 18 * @brief implementation of the lookup_statistics_counter_by_bucket function for Postgres 19 * @author Martin Schanzenbach 20 */ 21 #ifndef MERCHANT_DATABASE_LOOKUP_STATISTICS_COUNTER_BY_BUCKET_H 22 #define MERCHANT_DATABASE_LOOKUP_STATISTICS_COUNTER_BY_BUCKET_H 23 24 #include <taler/taler_util.h> 25 #include <taler/taler_json_lib.h> 26 #include "merchantdb_lib.h" 27 28 29 /** 30 * Function returning integer-valued statistics for a bucket. 31 * Called by `lookup_statistics_counter_by_bucket`. 32 * 33 * @param cls closure 34 * @param description description of the statistic 35 * @param bucket_start start time of the bucket 36 * @param bucket_end end time of the bucket 37 * @param bucket_range range of the bucket 38 * @param cumulative_counter counter value 39 */ 40 typedef void 41 (*TALER_MERCHANTDB_CounterByBucketStatisticsCallback)( 42 void *cls, 43 const char *description, 44 struct GNUNET_TIME_Timestamp bucket_start, 45 struct GNUNET_TIME_Timestamp bucket_end, 46 const char *bucket_range, 47 uint64_t cumulative_counter); 48 49 /** 50 * Lookup statistics where the values are counters. 51 * 52 * @param pg database context 53 * @param instance_id instance to lookup statistics for 54 * @param slug slug to lookup statistics for 55 * @param cb function to call on all statistics found 56 * @param cb_cls closure for @a cb 57 * @return database result code 58 */ 59 enum GNUNET_DB_QueryStatus 60 TALER_MERCHANTDB_lookup_statistics_counter_by_bucket ( 61 struct TALER_MERCHANTDB_PostgresContext *pg, 62 const char *instance_id, 63 const char *slug, 64 TALER_MERCHANTDB_CounterByBucketStatisticsCallback cb, 65 void *cb_cls); 66 67 #endif