Interface IStorageBackend
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- All Known Implementing Classes:
SimpleLocalStorageBackend
public interface IStorageBackend
An abstract storage backend that instantiates tables and coordinates transactions.EXPERIMENTAL. This class or interface has been added as part of a work in progress. There is no guarantee that this API will work or that it will remain the same.
- Since:
- 2.1
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description ITableWriterBinary.Table<java.lang.Object,java.lang.Object>
createBinaryTable(IInputKey key, ITableContext tableContext, boolean unique)
Creates an index table for a simple source-target bidirectional mapping.ITableWriterUnary.Table<java.lang.Object>
createUnaryTable(IInputKey key, ITableContext tableContext, boolean unique)
Creates an index table for a simple value set.void
finishTransaction()
Marks the end of a transaction.void
startTransaction()
Marks the beginning of a transaction.
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Method Detail
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startTransaction
void startTransaction()
Marks the beginning of a transaction. In transaction mode, table updates may be temporarily delayed (IIndexTable
methods may return stale answers) for better performance.
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finishTransaction
void finishTransaction()
Marks the end of a transaction. Any updates delayed during the transaction must now be flushed.
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createUnaryTable
ITableWriterUnary.Table<java.lang.Object> createUnaryTable(IInputKey key, ITableContext tableContext, boolean unique)
Creates an index table for a simple value set.- Parameters:
unique
- client promises to only insert a given tuple with multiplicity one
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createBinaryTable
ITableWriterBinary.Table<java.lang.Object,java.lang.Object> createBinaryTable(IInputKey key, ITableContext tableContext, boolean unique)
Creates an index table for a simple source-target bidirectional mapping.- Parameters:
unique
- client promises to only insert a given tuple with multiplicity one
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