database

type Bucket struct {
	// contains filtered or unexported fields
}

type Cursor interface {
	// Next moves the iterator to the next key/value pair. It returns whether the
	// iterator is exhausted. Panics if the cursor is closed.
	Next() bool

	// First moves the iterator to the first key/value pair. It returns false if
	// such a pair does not exist. Panics if the cursor is closed.
	First() bool

	// Seek moves the iterator to the first key/value pair whose key is greater
	// than or equal to the given key. It returns ErrNotFound if such pair does not
	// exist.
	Seek(key *Key) error

	// Key returns the key of the current key/value pair, or ErrNotFound if done.
	// The caller should not modify the contents of the returned key, and
	// its contents may change on the next call to Next.
	Key() (*Key, error)

	// Value returns the value of the current key/value pair, or ErrNotFound if done.
	// The caller should not modify the contents of the returned slice, and its
	// contents may change on the next call to Next.
	Value() ([]byte, error)

	// Close releases associated resources.
	Close() error
}

type DataAccessor interface {
	// Put sets the value for the given key. It overwrites
	// any previous value for that key.
	Put(key *Key, value []byte) error

	// Get gets the value for the given key. It returns
	// ErrNotFound if the given key does not exist.
	Get(key *Key) ([]byte, error)

	// Has returns true if the database does contains the
	// given key.
	Has(key *Key) (bool, error)

	// Delete deletes the value for the given key. Will not
	// return an error if the key doesn't exist.
	Delete(key *Key) error

	// Cursor begins a new cursor over the given bucket.
	Cursor(bucket *Bucket) (Cursor, error)
}

type Database interface {
	DataAccessor

	// Begin begins a new database transaction.
	Begin() (Transaction, error)

	// Compact compacts the database instance.
	Compact() error

	// Close closes the database.
	Close() error
}

type Key struct {
	// contains filtered or unexported fields
}

type Transaction interface {
	DataAccessor

	// Rollback rolls back whatever changes were made to the
	// database within this transaction.
	Rollback() error

	// Commit commits whatever changes were made to the database
	// within this transaction.
	Commit() error

	// RollbackUnlessClosed rolls back changes that were made to
	// the database within the transaction, unless the transaction
	// had already been closed using either Rollback or Commit.
	RollbackUnlessClosed() error
}