C# Класс LightningDB.LightningTransaction

Represents a transaction.

Наследование: IDisposable

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Открытые методы

Метод	Описание
Abort ( ) : void	Abandon all the operations of the transaction instead of saving them. All cursors opened within the transaction will be closed by this call. The cursors and transaction handle will be freed and must not be used again after this call.
BeginTransaction ( ) : LightningTransaction	Begins a child transaction.
BeginTransaction ( TransactionBeginFlags beginFlags ) : LightningTransaction	Begin a child transaction.
Commit ( ) : void	Commit all the operations of a transaction into the database. All cursors opened within the transaction will be closed by this call. The cursors and transaction handle will be freed and must not be used again after this call.
ContainsKey ( LightningDatabase db, byte key ) : bool	Check whether data exists in database.
CreateCursor ( LightningDatabase db ) : LightningDB.LightningCursor	Create a cursor. Cursors are associated with a specific transaction and database and may not span threads.
Delete ( LightningDatabase db, byte key ) : void	Delete items from a database. This function removes key/data pairs from the database. If the database does not support sorted duplicate data items (MDB_DUPSORT) the data parameter is ignored. If the database supports sorted duplicates and the data parameter is NULL, all of the duplicate data items for the key will be deleted. Otherwise, if the data parameter is non-NULL only the matching data item will be deleted. This function will return MDB_NOTFOUND if the specified key/data pair is not in the database.
Delete ( LightningDatabase db, byte key, byte value ) : void	Delete items from a database. This function removes key/data pairs from the database. If the database does not support sorted duplicate data items (MDB_DUPSORT) the data parameter is ignored. If the database supports sorted duplicates and the data parameter is NULL, all of the duplicate data items for the key will be deleted. Otherwise, if the data parameter is non-NULL only the matching data item will be deleted. This function will return MDB_NOTFOUND if the specified key/data pair is not in the database.
Dispose ( ) : void	Dispose this transaction and deallocate all resources associated with it (including databases).
DropDatabase ( LightningDatabase database ) : void	Drops the database.
Equals ( object obj ) : bool
Get ( LightningDatabase db, byte key ) : byte[]	Get value from a database.
GetEntriesCount ( LightningDatabase db ) : long	The number of items in the database.
GetHashCode ( ) : int
Handle ( ) : IntPtr
OpenDatabase ( string name = null, DatabaseConfiguration configuration = null ) : LightningDatabase	Opens a database in context of this transaction.
Put ( LightningDatabase db, byte key, byte value, PutOptions options = PutOptions.None ) : void	Put data into a database.
Renew ( ) : void	Renew current transaction.
Reset ( ) : void	Reset current transaction.
TruncateDatabase ( LightningDatabase database ) : void	Truncates all data from the database.
TryGet ( LightningDatabase db, byte key, byte &value ) : bool	Tries to get a value by its key.

Защищенные методы

Метод	Описание
Dispose ( bool disposing ) : void	Abort this transaction and deallocate all resources associated with it (including databases).

Приватные методы

Метод	Описание
LightningTransaction ( LightningEnvironment environment, LightningTransaction parent, TransactionBeginFlags flags ) : System	Created new instance of LightningTransaction
OnParentStateChanging ( LightningTransactionState state ) : void

Описание методов

Abort() публичный Метод

Abandon all the operations of the transaction instead of saving them. All cursors opened within the transaction will be closed by this call. The cursors and transaction handle will be freed and must not be used again after this call.

public Abort ( ) : void
Результат	void

BeginTransaction() публичный Метод

Begins a child transaction.

public BeginTransaction ( ) : LightningTransaction
Результат	LightningTransaction

BeginTransaction() публичный Метод

Begin a child transaction.

public BeginTransaction ( TransactionBeginFlags beginFlags ) : LightningTransaction
beginFlags	TransactionBeginFlags	Options for a new transaction.
Результат	LightningTransaction

Commit() публичный Метод

Commit all the operations of a transaction into the database. All cursors opened within the transaction will be closed by this call. The cursors and transaction handle will be freed and must not be used again after this call.

public Commit ( ) : void
Результат	void

ContainsKey() публичный Метод

Check whether data exists in database.

public ContainsKey ( LightningDatabase db, byte key ) : bool
db	LightningDatabase	Database.
key	byte	Key.
Результат	bool

CreateCursor() публичный Метод

Create a cursor. Cursors are associated with a specific transaction and database and may not span threads.

public CreateCursor ( LightningDatabase db ) : LightningDB.LightningCursor
db	LightningDatabase	A database.
Результат	LightningDB.LightningCursor

Delete() публичный Метод

Delete items from a database. This function removes key/data pairs from the database. If the database does not support sorted duplicate data items (MDB_DUPSORT) the data parameter is ignored. If the database supports sorted duplicates and the data parameter is NULL, all of the duplicate data items for the key will be deleted. Otherwise, if the data parameter is non-NULL only the matching data item will be deleted. This function will return MDB_NOTFOUND if the specified key/data pair is not in the database.

public Delete ( LightningDatabase db, byte key ) : void
db	LightningDatabase	A database handle returned by mdb_dbi_open()
key	byte	The key to delete from the database
Результат	void

Delete() публичный Метод

public Delete ( LightningDatabase db, byte key, byte value ) : void
db	LightningDatabase	A database handle returned by mdb_dbi_open()
key	byte	The key to delete from the database
value	byte	The data to delete (optional)
Результат	void

Dispose() публичный Метод

Dispose this transaction and deallocate all resources associated with it (including databases).

public Dispose ( ) : void
Результат	void

Dispose() защищенный Метод

Abort this transaction and deallocate all resources associated with it (including databases).

protected Dispose ( bool disposing ) : void
disposing	bool	True if called from Dispose.
Результат	void

DropDatabase() публичный Метод

Drops the database.

public DropDatabase ( LightningDatabase database ) : void
database	LightningDatabase
Результат	void

Equals() публичный Метод

public Equals ( object obj ) : bool
obj	object
Результат	bool

Get() публичный Метод

Get value from a database.

public Get ( LightningDatabase db, byte key ) : byte[]
db	LightningDatabase	Database
key	byte	Key byte array.
Результат	byte[]

GetEntriesCount() публичный Метод

The number of items in the database.

public GetEntriesCount ( LightningDatabase db ) : long
db	LightningDatabase	The database we are counting items in.
Результат	long

GetHashCode() публичный Метод

public GetHashCode ( ) : int
Результат	int

Handle() публичный Метод

public Handle ( ) : IntPtr
Результат	System.IntPtr

OpenDatabase() публичный Метод

Opens a database in context of this transaction.

public OpenDatabase ( string name = null, DatabaseConfiguration configuration = null ) : LightningDatabase
name	string	Database name (optional). If null then the default name is used.
configuration	DatabaseConfiguration	Database open options.
Результат	LightningDatabase

Put() публичный Метод

Put data into a database.

public Put ( LightningDatabase db, byte key, byte value, PutOptions options = PutOptions.None ) : void
db	LightningDatabase	Database.
key	byte	Key byte array.
value	byte	Value byte array.
options	PutOptions	Operation options (optional).
Результат	void

Renew() публичный Метод

Renew current transaction.

public Renew ( ) : void
Результат	void

Reset() публичный Метод

Reset current transaction.

public Reset ( ) : void
Результат	void

TruncateDatabase() публичный Метод

Truncates all data from the database.

public TruncateDatabase ( LightningDatabase database ) : void
database	LightningDatabase
Результат	void

TryGet() публичный Метод

Tries to get a value by its key.

public TryGet ( LightningDatabase db, byte key, byte &value ) : bool
db	LightningDatabase	Database.
key	byte	Key byte array.
value	byte	Value byte array if exists.
Результат	bool