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/*************************************************************************************************
* Example for advanced operations of the skip database
*
* Copyright 2020 Google LLC
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of the License at
* https://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language governing permissions
* and limitations under the License.
*************************************************************************************************/
#include "tkrzw_cmd_util.h"
#include "tkrzw_dbm_skip.h"
#include "tkrzw_str_util.h"
// Main routine.
int main(int argc, char** argv) {
// All symbols of Tkrzw are under the namespace "tkrzw".
using namespace tkrzw;
// Creates the database manager.
SkipDBM dbm;
// Opens a new database,
Status status = dbm.Open("casket.tks", true, File::OPEN_TRUNCATE);
// Adds records.
// Duplicated keys are allowed.
dbm.Set("Japan", "Tokyo");
dbm.Set("Japan", "Osaka");
dbm.Set("France", "Paris");
dbm.Set("China", "Beijing");
// Synchronizes the database.
// This makes new records visible.
dbm.Synchronize(false);
// Prints all records.
PrintL("-- Original Records --");
PrintDBMRecordsInTSV(&dbm);
// Adds more records.
dbm.Set("Japan", "Nagoya");
dbm.Set("China", "Shanghai");
// Removes a record.
dbm.Remove("France");
// Synchronizes the database.
// This makes the updates visible.
dbm.Synchronize(false);
// Prints all records.
PrintL("-- Records After Updates --");
PrintDBMRecordsInTSV(&dbm);
// Synchronizes the database with a reducer to deduplicate records.
dbm.SynchronizeAdvanced(false, nullptr, SkipDBM::ReduceToFirst);
// Prints all records.
PrintL("-- Records After Deduplication --");
PrintDBMRecordsInTSV(&dbm);
// Closes the database.
status = dbm.Close();
return 0;
}
// END OF FILE
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