C# 클래스 LightningDB.LightningTransaction

Represents a transaction.

상속: IDisposable

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공개 메소드들

메소드	설명
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.

보호된 메소드들

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

비공개 메소드들

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

메소드 상세

Abort() 공개 메소드

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
리턴	void

BeginTransaction() 공개 메소드

Begins a child transaction.

public BeginTransaction ( ) : LightningTransaction
리턴	LightningTransaction

BeginTransaction() 공개 메소드

Begin a child transaction.

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

Commit() 공개 메소드

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
리턴	void

ContainsKey() 공개 메소드

Check whether data exists in database.

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

CreateCursor() 공개 메소드

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.
리턴	LightningDB.LightningCursor

Delete() 공개 메소드

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
리턴	void

Delete() 공개 메소드

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)
리턴	void

Dispose() 공개 메소드

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

public Dispose ( ) : void
리턴	void

Dispose() 보호된 메소드

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

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

DropDatabase() 공개 메소드

Drops the database.

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

Equals() 공개 메소드

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

Get() 공개 메소드

Get value from a database.

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

GetEntriesCount() 공개 메소드

The number of items in the database.

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

GetHashCode() 공개 메소드

public GetHashCode ( ) : int
리턴	int

Handle() 공개 메소드

public Handle ( ) : IntPtr
리턴	System.IntPtr

OpenDatabase() 공개 메소드

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.
리턴	LightningDatabase

Put() 공개 메소드

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).
리턴	void

Renew() 공개 메소드

Renew current transaction.

public Renew ( ) : void
리턴	void

Reset() 공개 메소드

Reset current transaction.

public Reset ( ) : void
리턴	void

TruncateDatabase() 공개 메소드

Truncates all data from the database.

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

TryGet() 공개 메소드

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.
리턴	bool