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0715033d6a
* Migrate to new SNTRuleType enum values * Bump table version. Fix comments to address PR feedback. * Add log message when a downgrade detected
101 lines
2.7 KiB
Objective-C
101 lines
2.7 KiB
Objective-C
/// Copyright 2015 Google Inc. All rights reserved.
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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#import "Source/santad/DataLayer/SNTDatabaseTable.h"
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#include <sqlite3.h>
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#import "Source/common/SNTLogging.h"
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@interface SNTDatabaseTable ()
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@property FMDatabaseQueue *dbQ;
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@end
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@implementation SNTDatabaseTable
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- (instancetype)initWithDatabaseQueue:(FMDatabaseQueue *)db {
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if (!db) return nil;
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self = [super init];
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if (self) {
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__block BOOL bail = NO;
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[db inDatabase:^(FMDatabase *db) {
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if (![db goodConnection]) {
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if ([db lastErrorCode] == SQLITE_LOCKED) {
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LOGW(@"The database '%@' is locked by another process. Aborting.", [db databasePath]);
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[db close];
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bail = YES;
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return;
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}
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[self closeDeleteReopenDatabase:db];
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} else if ([db userVersion] > [self currentSupportedVersion]) {
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LOGW(@"Database version newer than supported. Deleting.");
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[self closeDeleteReopenDatabase:db];
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}
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}];
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if (bail) return nil;
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_dbQ = db;
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[self updateTableSchema];
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}
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return self;
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}
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- (instancetype)init {
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[self doesNotRecognizeSelector:_cmd];
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return nil;
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}
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- (void)closeDeleteReopenDatabase:(FMDatabase *)db {
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[db close];
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[[NSFileManager defaultManager] removeItemAtPath:[db databasePath] error:NULL];
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[db open];
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}
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- (uint32_t)initializeDatabase:(FMDatabase *)db fromVersion:(uint32_t)version {
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[self doesNotRecognizeSelector:_cmd];
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return 0;
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}
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- (uint32_t)currentSupportedVersion {
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[self doesNotRecognizeSelector:_cmd];
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return 0;
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}
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/// Called at the end of initialization to ensure the table in the
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/// database exists and uses the latest schema.
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- (void)updateTableSchema {
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[self inTransaction:^(FMDatabase *db, BOOL *rollback) {
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uint32_t currentVersion = [db userVersion];
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uint32_t newVersion = [self initializeDatabase:db fromVersion:currentVersion];
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if (newVersion < 1) return;
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LOGI(@"Updated %@ from version %d to %d", [self className], currentVersion, newVersion);
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[db setUserVersion:newVersion];
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}];
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}
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- (void)inDatabase:(void (^)(FMDatabase *db))block {
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[self.dbQ inDatabase:block];
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}
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- (void)inTransaction:(void (^)(FMDatabase *db, BOOL *rollback))block {
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[self.dbQ inTransaction:block];
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}
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@end
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