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SqLiteHelper.cpp
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171 lines (142 loc) · 5.38 KB
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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
*
* http://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 "SqLiteHelper.hpp"
#include <string.h>
int SqLiteHelper::initDB(const char* regionName, int maxPageCount, int pageSize,
const char* regionDBfile, int busy_timeout_ms) {
// open the database
int retCode = sqlite3_open(regionDBfile, &m_dbHandle);
if (retCode == SQLITE_OK) {
// set region name to tablename. database name is also table name
m_tableName = regionName;
sqlite3_busy_timeout(m_dbHandle, busy_timeout_ms);
// configure max page count
if (maxPageCount > 0) {
retCode = executePragma("max_page_count", maxPageCount);
}
if (retCode == SQLITE_OK && pageSize > 0) {
retCode = executePragma("page_size", pageSize);
}
// create table
if (retCode == SQLITE_OK) retCode = createTable();
}
return retCode;
}
int SqLiteHelper::createTable() {
// construct query
auto query = std::string("CREATE TABLE IF NOT EXISTS ") + m_tableName +
"(key BLOB PRIMARY KEY, value BLOB);";
sqlite3_stmt* stmt;
// prepare statement
int retCode;
retCode = sqlite3_prepare_v2(m_dbHandle, query.c_str(), -1, &stmt, nullptr);
// execute statement
if (retCode == SQLITE_OK) retCode = sqlite3_step(stmt);
sqlite3_finalize(stmt);
return retCode == SQLITE_DONE ? 0 : retCode;
}
int SqLiteHelper::insertKeyValue(void* keyData, int keyDataSize,
void* valueData, int valueDataSize) {
// construct query
auto query = std::string("REPLACE INTO ") + m_tableName + " VALUES(?,?);";
// prepare statement
sqlite3_stmt* stmt;
int retCode =
sqlite3_prepare_v2(m_dbHandle, query.c_str(), -1, &stmt, nullptr);
if (retCode == SQLITE_OK) {
// bind parameters and execte statement
sqlite3_bind_blob(stmt, 1, keyData, keyDataSize, nullptr);
sqlite3_bind_blob(stmt, 2, valueData, valueDataSize, nullptr);
retCode = sqlite3_step(stmt);
}
sqlite3_finalize(stmt);
return retCode == SQLITE_DONE ? 0 : retCode;
}
int SqLiteHelper::removeKey(void* keyData, int keyDataSize) {
// construct query
auto query = std::string("DELETE FROM ") + m_tableName + " WHERE key=?;";
// prepare statement
sqlite3_stmt* stmt;
int retCode =
sqlite3_prepare_v2(m_dbHandle, query.c_str(), -1, &stmt, nullptr);
if (retCode == SQLITE_OK) {
// bind parameters and execte statement
sqlite3_bind_blob(stmt, 1, keyData, keyDataSize, nullptr);
retCode = sqlite3_step(stmt);
}
sqlite3_finalize(stmt);
return retCode == SQLITE_DONE ? 0 : retCode;
}
int SqLiteHelper::getValue(void* keyData, int keyDataSize, void*& valueData,
int& valueDataSize) {
// construct query
auto query = std::string("SELECT value, length(value) AS valLength FROM ") +
m_tableName + " WHERE key=?;";
// prepare statement
sqlite3_stmt* stmt;
int retCode =
sqlite3_prepare_v2(m_dbHandle, query.c_str(), -1, &stmt, nullptr);
if (retCode == SQLITE_OK) {
// bind parameters and execte statement
sqlite3_bind_blob(stmt, 1, keyData, keyDataSize, nullptr);
retCode = sqlite3_step(stmt);
if (retCode == SQLITE_ROW) // we will get only one row
{
void* tempBuff = const_cast<void*>(sqlite3_column_blob(stmt, 0));
valueDataSize = sqlite3_column_int(stmt, 1);
valueData =
reinterpret_cast<uint8_t*>(malloc(sizeof(uint8_t) * valueDataSize));
memcpy(valueData, tempBuff, valueDataSize);
retCode = sqlite3_step(stmt);
}
}
sqlite3_finalize(stmt);
return retCode == SQLITE_DONE ? 0 : retCode;
}
int SqLiteHelper::dropTable() {
// create query
auto query = std::string("DROP TABLE ") + m_tableName + ";";
// prepare statement
sqlite3_stmt* stmt;
int retCode;
retCode = sqlite3_prepare_v2(m_dbHandle, query.c_str(), -1, &stmt, nullptr);
// execute statement
if (retCode == SQLITE_OK) retCode = sqlite3_step(stmt);
sqlite3_finalize(stmt);
return retCode == SQLITE_DONE ? 0 : retCode;
}
int SqLiteHelper::closeDB() {
int retCode = dropTable();
if (retCode == SQLITE_OK) retCode = sqlite3_close(m_dbHandle);
return retCode;
}
int SqLiteHelper::executePragma(const char* pragmaName, int pragmaValue) {
// create query
auto query = std::string("PRAGMA ") + pragmaName + " = " +
std::to_string(pragmaValue) + ";";
// prepare statement
sqlite3_stmt* stmt;
int retCode;
retCode = sqlite3_prepare_v2(m_dbHandle, query.c_str(), -1, &stmt, nullptr);
// execute PRAGMA
if (retCode == SQLITE_OK &&
sqlite3_step(stmt) == SQLITE_ROW) { // PRAGMA command return one row
retCode = sqlite3_step(stmt);
}
sqlite3_finalize(stmt);
return retCode == SQLITE_DONE ? 0 : retCode;
}