1 files changed, 41 insertions, 0 deletions
diff --git a/Firebase/Database/Persistence/FCachePolicy.h b/Firebase/Database/Persistence/FCachePolicy.h
new file mode 100644
index 0000000..16b49fb
--- /dev/null
+++ b/Firebase/Database/Persistence/FCachePolicy.h
@@ -0,0 +1,41 @@
+/*
+ * 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 <Foundation/Foundation.h>
+
+@protocol FCachePolicy <NSObject>
+
+- (BOOL)shouldPruneCacheWithSize:(NSUInteger)cacheSize numberOfTrackedQueries:(NSUInteger)numTrackedQueries;
+- (BOOL)shouldCheckCacheSize:(NSUInteger)serverUpdatesSinceLastCheck;
+- (float)percentOfQueriesToPruneAtOnce;
+- (NSUInteger)maxNumberOfQueriesToKeep;
+
+@end
+
+
+@interface FLRUCachePolicy : NSObject<FCachePolicy>
+
+@property (nonatomic, readonly) NSUInteger maxSize;
+
+- (id)initWithMaxSize:(NSUInteger)maxSize;
+
+@end
+
+@interface FNoCachePolicy : NSObject<FCachePolicy>
+
++ (FNoCachePolicy *)noCachePolicy;
+
+@end