All Superinterfaces:

AutoCloseable, Closeable
```
@ThreadSafe
public interface Importer
extends Closeable
```
Allows to run an import. For performance reasons, imports are run without transactions.
Since import is multi threaded, implementations must be thread-safe.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default void`	`aborted()`	Notifies this importer that the import failed or was cancelled, before `close()` runs: what the trees hold is an incomplete import that is going to be run again.
`void`	`clearTree(TreeName treeName)`	Clear the tree whose name is provided.
`void`	`close()`
`SequentialCursor<ByteString,ByteString>`	`openCursor(TreeName treeName)`	Opens a cursor on the tree whose name is provided.
`void`	`put(TreeName treeName, ByteSequence key, ByteSequence value)`	Creates a record with the provided key and value in the tree identified by the provided name.
`ByteString`	`read(TreeName treeName, ByteSequence key)`	Reads the record's value associated to the provided key, in the tree whose name is provided.

- Method Detail
  - clearTree
```
void clearTree(TreeName treeName)
```
    Clear the tree whose name is provided. Ensure that an empty tree with the given name exists. If the tree already exists, all the data it contains will be deleted. If not, an empty tree will be created.
    
    Parameters:
    
    treeName - name of the tree to clear
  - put
```
void put(TreeName treeName,
         ByteSequence key,
         ByteSequence value)
```
    Creates a record with the provided key and value in the tree identified by the provided name. At the end of this method, the record is visible by read(TreeName, ByteSequence) and openCursor(TreeName) methods of this instance. The record is guaranteed to be persisted only after close().
    
    Parameters:
    
    treeName - the tree name
    
    key - the new record's key
    
    value - the new record's value
  - read
```
ByteString read(TreeName treeName,
                ByteSequence key)
```
    Reads the record's value associated to the provided key, in the tree whose name is provided.
    
    Parameters:
    
    treeName - the tree name
    
    key - the record's key
    
    Returns:
    
    the record's value, or null if none exists
  - openCursor
```
SequentialCursor<ByteString,ByteString> openCursor(TreeName treeName)
```
    Opens a cursor on the tree whose name is provided. Cursors are predictable only if there is no pending put(TreeName, ByteSequence, ByteSequence) operations. Indeed, once opened, cursors might not reflect changes.
    
    Parameters:
    
    treeName - the tree name
    
    Returns:
    
    a new cursor
  - aborted
```
default void aborted()
```
    Notifies this importer that the import failed or was cancelled, before close() runs: what the trees hold is an incomplete import that is going to be run again. Implementations doing work of their own in close() on the assumption that the data is final - refreshing the optimizer statistics of a database, for instance - can skip it. The default implementation does nothing.
  - close
```
void close()
```
    Specified by:
    
    close in interface AutoCloseable
    
    Specified by:
    
    close in interface Closeable

Interface Importer

Method Summary

Method Detail

clearTree

put

read

openCursor

aborted

close