kvdb

Documentation

Index

• Constants
• Variables
• type Backend
• type Driver
• type ReadBucket
• type ReadCursor
• type ReadTx
• type RwBucket
• type RwCursor
• type RwTx

Constants

const BoltBackendName = "bdb"

BoltBackendName is the name of the backend that should be passed into kvdb.Create to initialize a new instance of kvdb.Backend backed by a live instance of bbolt.

Variables

var (
	// ErrBucketNotFound is returned when trying to access a bucket that
	// has not been created yet.
	ErrBucketNotFound = walletdb.ErrBucketNotFound

	// ErrBucketExists is returned when creating a bucket that already
	// exists.
	ErrBucketExists = walletdb.ErrBucketExists

	// ErrDatabaseNotOpen is returned when a database instance is accessed
	// before it is opened or after it is closed.
	ErrDatabaseNotOpen = walletdb.ErrDbNotOpen
)

var Batch = walletdb.Batch

Batch is identical to the Update call, but it attempts to combine several individual Update transactions into a single write database transaction on an optimistic basis. This only has benefits if multiple goroutines call Batch.

var Create = walletdb.Create

Create initializes and opens a database for the specified type. The arguments are specific to the database type driver. See the documentation for the database driver for further details.

ErrDbUnknownType will be returned if the database type is not registered.

var Open = walletdb.Open

Open opens an existing database for the specified type. The arguments are specific to the database type driver. See the documentation for the database driver for further details.

ErrDbUnknownType will be returned if the database type is not registered.

var Update = walletdb.Update

Update opens a database read/write transaction and executes the function f with the transaction passed as a parameter. After f exits, if f did not error, the transaction is committed. Otherwise, if f did error, the transaction is rolled back. If the rollback fails, the original error returned by f is still returned. If the commit fails, the commit error is returned.

var View = walletdb.View

View opens a database read transaction and executes the function f with the transaction passed as a parameter. After f exits, the transaction is rolled back. If f errors, its error is returned, not a rollback error (if any occur).

Types

type Backend

type Backend = walletdb.DB

Backend represents an ACID database. All database access is performed through read or read+write transactions.

type Driver

type Driver = walletdb.Driver

Driver defines a structure for backend drivers to use when they registered themselves as a backend which implements the Backend interface.

type ReadBucket

type ReadBucket = walletdb.ReadBucket

ReadBucket represents a bucket (a hierarchical structure within the database) that is only allowed to perform read operations.

type ReadCursor

type ReadCursor = walletdb.ReadCursor

ReadCursor represents a bucket cursor that can be positioned at the start or end of the bucket's key/value pairs and iterate over pairs in the bucket. This type is only allowed to perform database read operations.

type ReadTx

type ReadTx = walletdb.ReadTx

ReadTx represents a database transaction that can only be used for reads. If a database update must occur, use a RwTx.

type RwBucket

type RwBucket = walletdb.ReadWriteBucket

RwBucket represents a bucket (a hierarchical structure within the database) that is allowed to perform both read and write operations.

type RwCursor

type RwCursor = walletdb.ReadWriteCursor

RwCursor represents a bucket cursor that can be positioned at the start or end of the bucket's key/value pairs and iterate over pairs in the bucket. This abstraction is allowed to perform both database read and write operations.

type RwTx

type RwTx = walletdb.ReadWriteTx

ReadWriteTx represents a database transaction that can be used for both reads and writes. When only reads are necessary, consider using a ReadTx instead.