lookup_statistics_counter_by_bucket2.h (2501B)
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_bucket2.h 18 * @brief implementation of the lookup_statistics_counter_by_bucket2 function for Postgres 19 * @author Christian Grothoff 20 */ 21 #ifndef MERCHANT_DATABASE_LOOKUP_STATISTICS_COUNTER_BY_BUCKET2_H 22 #define MERCHANT_DATABASE_LOOKUP_STATISTICS_COUNTER_BY_BUCKET2_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_bucket2`. 32 * 33 * @param cls closure 34 * @param bucket_start start time of the bucket 35 * @param counters_len the length of @a cumulative_amounts 36 * @param descriptions description for the counter in the bucket 37 * @param counters the counters in the bucket 38 */ 39 typedef void 40 (*TALER_MERCHANTDB_CounterByBucketStatisticsCallback2)( 41 void *cls, 42 struct GNUNET_TIME_Timestamp bucket_start, 43 unsigned int counters_len, 44 const char *descriptions[static counters_len], 45 uint64_t counters[static counters_len]); 46 47 48 /** 49 * Lookup counter statistics for instance and slug-prefix by bucket. 50 * 51 * @param pg database context 52 * @param instance_id instance to lookup statistics for 53 * @param prefix slug prefix to lookup statistics under 54 * @param granularity limit to buckets of this size 55 * @param counter requested number of buckets 56 * @param cb function to call on all token families found 57 * @param cb_cls closure for @a cb 58 * @return database result code 59 */ 60 enum GNUNET_DB_QueryStatus 61 TALER_MERCHANTDB_lookup_statistics_counter_by_bucket2 ( 62 struct TALER_MERCHANTDB_PostgresContext *pg, 63 const char *instance_id, 64 const char *prefix, 65 const char *granularity, 66 uint64_t counter, 67 TALER_MERCHANTDB_CounterByBucketStatisticsCallback2 cb, 68 void *cb_cls); 69 70 71 #endif