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Diffstat (limited to 'Firestore/Source/Local/FSTWriteGroupTracker.mm')
-rw-r--r-- | Firestore/Source/Local/FSTWriteGroupTracker.mm | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/Firestore/Source/Local/FSTWriteGroupTracker.mm b/Firestore/Source/Local/FSTWriteGroupTracker.mm new file mode 100644 index 0000000..7e3bf60 --- /dev/null +++ b/Firestore/Source/Local/FSTWriteGroupTracker.mm @@ -0,0 +1,52 @@ +/* + * Copyright 2017 Google + * + * 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 + * + * 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. + */ + +#import "Firestore/Source/Local/FSTWriteGroupTracker.h" + +#import "Firestore/Source/Local/FSTWriteGroup.h" +#import "Firestore/Source/Util/FSTAssert.h" + +NS_ASSUME_NONNULL_BEGIN + +@interface FSTWriteGroupTracker () +@property(nonatomic, strong, nullable) FSTWriteGroup *activeGroup; +@end + +@implementation FSTWriteGroupTracker + ++ (instancetype)tracker { + return [[FSTWriteGroupTracker alloc] init]; +} + +- (FSTWriteGroup *)startGroupWithAction:(NSString *)action { + // NOTE: We can relax this to allow nesting if/when we find we need it. + FSTAssert(!self.activeGroup, + @"Attempt to create write group (%@) while existing write group (%@) still active.", + action, self.activeGroup.action); + self.activeGroup = [FSTWriteGroup groupWithAction:action]; + return self.activeGroup; +} + +- (void)endGroup:(FSTWriteGroup *)group { + FSTAssert(self.activeGroup == group, + @"Attempted to end write group (%@) which is different from active group (%@)", + group.action, self.activeGroup.action); + self.activeGroup = nil; +} + +@end + +NS_ASSUME_NONNULL_END |