| Package | Description | 
|---|---|
| org.apache.cassandra.io.sstable | |
| org.apache.cassandra.io.util | |
| org.apache.cassandra.utils | |
| org.apache.cassandra.utils.concurrent | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | IndexSummary | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | ChannelProxyA proxy of a FileChannel that:
 - implements reference counting
 - exports only thread safe FileChannel operations
 - wraps IO exceptions into runtime exceptions
 Tested by RandomAccessReaderTest. | 
| class  | FileHandleFileHandleprovides access to a file for reading, including the ones written by variousSequentialWriterinstances, and it is typically used bySSTableReader. | 
| class  | MmappedRegions | 
| class  | SafeMemory | 
| Modifier and Type | Interface and Description | 
|---|---|
| interface  | IFilter | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | AlwaysPresentFilter | 
| class  | BloomFilter | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | SharedCloseableImplA simple abstract implementation of SharedCloseable | 
| class  | WrappedSharedCloseableAn implementation of SharedCloseable that wraps a normal AutoCloseable,
 ensuring its close method is only called when all instances of SharedCloseable have been | 
| Modifier and Type | Method and Description | 
|---|---|
| SharedCloseable | SharedCloseable. sharedCopy() | 
| Modifier and Type | Method and Description | 
|---|---|
| void | Ref.IdentityCollection. add(SharedCloseable ref) | 
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