org.opends.server.backends.pluggable.spi

Interface ReadableTransaction

All Known Subinterfaces:

WriteableTransaction

public interface ReadableTransaction

Represents a readable transaction on a storage engine.

Method Summary

Modifier and Type	Method and Description
long	getRecordCount(TreeName treeName) Returns the number of key/value pairs in the provided tree.
Cursor<ByteString,ByteString>	openCursor(TreeName treeName) Opens a cursor on the tree whose name is provided.
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

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

Cursor<ByteString,ByteString> openCursor(TreeName treeName)

Opens a cursor on the tree whose name is provided.

Parameters:

treeName - the tree name

Returns:

a new cursor

getRecordCount

long getRecordCount(TreeName treeName)

Returns the number of key/value pairs in the provided tree.

Parameters:

treeName - the tree name

Returns:

the number of key/value pairs in the provided tree.