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MDUYNMDUYN
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Add advanced evaluation
1 parent 14991bb commit 642ac86

28 files changed

Lines changed: 2517 additions & 883 deletions

‎benchmark/advanced/multi_class_database_system/multi_class_database_system.cpp‎

Lines changed: 1 addition & 248 deletions
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namespace multi_class_database_system {
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// Private/Internal class that coordinates all database operations
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// This class is not exposed in the public API but manages all complexity
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class DatabaseEngine {
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private:
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ConnectionPoolManager connection_pool;
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QueryOptimizer optimizer;
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TransactionManager transaction_mgr;
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ResultProcessor result_processor;
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CacheManager cache_mgr;
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bool initialized = false;
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public:
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DatabaseEngine() {
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// Initialize all internal components
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connection_pool.initialize_pool(10);
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optimizer.initialize();
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transaction_mgr.initialize();
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result_processor.initialize();
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cache_mgr.initialize(50);
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initialized = true;
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}
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std::string execute_operation(const std::string& operation_type,
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const std::string& query,
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const std::map<std::string, std::string>& parameters) {
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if (!initialized) {
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return result_processor.format_error_result("Database engine not initialized");
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}
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// Validate operation type
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if (operation_type != "SELECT" && operation_type != "INSERT" &&
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operation_type != "UPDATE" && operation_type != "DELETE" &&
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operation_type != "TRANSACTION" && operation_type != "ANALYZE") {
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return result_processor.format_error_result("Invalid operation type");
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}
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// Handle transaction operations specially
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if (operation_type == "TRANSACTION") {
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return handle_transaction_operation(query);
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}
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// Validate and optimize query
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if (!optimizer.validate_query(query)) {
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return result_processor.format_error_result("SQL syntax error");
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}
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// Check cache for SELECT operations
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if (operation_type == "SELECT" || operation_type == "ANALYZE") {
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std::string cache_key = cache_mgr.generate_cache_key(query, parameters);
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if (cache_mgr.is_cached(cache_key)) {
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std::string cached_result = cache_mgr.get_cached_result(cache_key);
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if (!cached_result.empty()) {
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return cached_result;
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}
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}
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}
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// Get database connection
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std::string connection_id = connection_pool.acquire_connection();
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if (connection_id.empty()) {
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return result_processor.format_error_result("Database connection failed");
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}
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std::string result;
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try {
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// Process query based on operation type
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if (operation_type == "SELECT") {
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result = handle_select_operation(query, parameters, connection_id);
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} else if (operation_type == "INSERT") {
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result = handle_insert_operation(query, parameters, connection_id);
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} else if (operation_type == "UPDATE") {
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result = handle_update_operation(query, parameters, connection_id);
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} else if (operation_type == "DELETE") {
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result = handle_delete_operation(query, parameters, connection_id);
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} else if (operation_type == "ANALYZE") {
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result = handle_analyze_operation(query, parameters, connection_id);
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}
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// Cache result for SELECT and ANALYZE operations
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if ((operation_type == "SELECT" || operation_type == "ANALYZE") &&
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optimizer.is_cacheable(query)) {
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std::string cache_key = cache_mgr.generate_cache_key(query, parameters);
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cache_mgr.cache_result(cache_key, result);
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}
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} catch (const std::exception& e) {
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result = result_processor.format_error_result("Database operation failed");
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}
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// Release connection back to pool
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connection_pool.release_connection(connection_id);
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return result;
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}
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private:
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std::string handle_select_operation(const std::string& query,
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const std::map<std::string, std::string>& parameters,
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const std::string& connection_id) {
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(void)connection_id; // Suppress unused parameter warning
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// Simulate query execution and result processing
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std::string optimized_query = optimizer.optimize_query(query);
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std::string bound_query = optimizer.bind_parameters(optimized_query, parameters);
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// Simulate database results
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std::vector<std::map<std::string, std::string>> mock_results = {
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{{"id", "1"}, {"name", "Alice"}, {"email", "alice@example.com"}},
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{{"id", "2"}, {"name", "Bob"}, {"email", "bob@example.com"}}
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};
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return result_processor.format_select_results(mock_results);
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}
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std::string handle_insert_operation(const std::string& query,
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const std::map<std::string, std::string>& parameters,
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const std::string& connection_id) {
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(void)connection_id; // Suppress unused parameter warning
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std::string bound_query = optimizer.bind_parameters(query, parameters);
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// Simulate INSERT execution
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int affected_rows = 1;
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std::string last_insert_id = "123";
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// Invalidate related cache entries
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cache_mgr.invalidate_cache("SELECT");
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return result_processor.format_modification_results("INSERT", affected_rows, last_insert_id);
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}
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std::string handle_update_operation(const std::string& query,
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const std::map<std::string, std::string>& parameters,
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const std::string& connection_id) {
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(void)connection_id; // Suppress unused parameter warning
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std::string bound_query = optimizer.bind_parameters(query, parameters);
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// Simulate UPDATE execution
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int affected_rows = 1;
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// Invalidate cache since data changed
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cache_mgr.invalidate_cache();
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return result_processor.format_modification_results("UPDATE", affected_rows);
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}
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std::string handle_delete_operation(const std::string& query,
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const std::map<std::string, std::string>& parameters,
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const std::string& connection_id) {
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(void)connection_id; // Suppress unused parameter warning
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std::string bound_query = optimizer.bind_parameters(query, parameters);
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// Simulate DELETE execution
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int affected_rows = 1;
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// Invalidate cache since data changed
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cache_mgr.invalidate_cache();
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return result_processor.format_modification_results("DELETE", affected_rows);
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}
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std::string handle_analyze_operation(const std::string& query,
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const std::map<std::string, std::string>& parameters,
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const std::string& connection_id) {
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(void)connection_id; // Suppress unused parameter warning
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std::string optimized_query = optimizer.optimize_query(query);
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std::string execution_plan = optimizer.get_execution_plan(optimized_query);
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// Simulate performance metrics
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std::random_device rd;
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std::mt19937 gen(rd());
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std::uniform_int_distribution<> time_dist(10, 200);
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std::uniform_int_distribution<> rows_dist(100, 10000);
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int execution_time = time_dist(gen);
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int rows_examined = rows_dist(gen);
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// Check if this was a cache hit
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std::string cache_key = cache_mgr.generate_cache_key(query, parameters);
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bool cache_hit = cache_mgr.is_cached(cache_key);
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return result_processor.format_analysis_results(execution_time, rows_examined, cache_hit);
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}
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std::string handle_transaction_operation(const std::string& action) {
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std::string upper_action = action;
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std::transform(upper_action.begin(), upper_action.end(), upper_action.begin(), ::toupper);
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if (upper_action == "BEGIN") {
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std::string connection_id = connection_pool.acquire_connection();
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if (connection_id.empty()) {
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return result_processor.format_error_result("Database connection failed");
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}
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std::string txn_id = transaction_mgr.begin_transaction(connection_id);
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if (txn_id.empty()) {
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connection_pool.release_connection(connection_id);
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return result_processor.format_error_result("Transaction failed");
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}
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return result_processor.format_transaction_results("begin", txn_id);
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} else if (upper_action == "COMMIT") {
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// For demo purposes, use a mock transaction ID
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std::string txn_id = "TXN1";
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if (transaction_mgr.commit_transaction(txn_id)) {
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return result_processor.format_transaction_results("commit", txn_id);
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} else {
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return result_processor.format_error_result("Transaction failed");
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}
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} else if (upper_action == "ROLLBACK") {
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// For demo purposes, use a mock transaction ID
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std::string txn_id = "TXN1";
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if (transaction_mgr.rollback_transaction(txn_id)) {
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return result_processor.format_transaction_results("rollback", txn_id);
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} else {
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return result_processor.format_error_result("Transaction failed");
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}
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}
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return result_processor.format_error_result("Invalid transaction action");
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}
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};
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// Global instance of the database engine (hidden from public API)
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static DatabaseEngine& get_database_engine() {
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static DatabaseEngine engine;
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return engine;
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}
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// Public API implementation - the only function exposed to users
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std::string execute_database_operation(const std::string& operation_type,
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const std::string& query,
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const std::map<std::string, std::string>& parameters) {
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try {
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return get_database_engine().execute_operation(operation_type, query, parameters);
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} catch (const std::exception& e) {
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return "{\"status\": \"error\", \"message\": \"Internal system error\"}";
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} catch (...) {
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return "{\"status\": \"error\", \"message\": \"Unknown system error\"}";
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}
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}
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// TODO : add your solution here
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} // namespace multi_class_database_system

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