mirror of
https://bitbucket.org/s_l_teichmann/mtsatellite
synced 2024-12-23 16:50:18 +01:00
46 lines
1.5 KiB
Go
46 lines
1.5 KiB
Go
// Copyright 2014, 2015 by Sascha L. Teichmann
|
|
// Use of this source code is governed by the MIT license
|
|
// that can be found in the LICENSE file.
|
|
|
|
package main
|
|
|
|
type (
|
|
// Block is the essential transfer unit from to the database.
|
|
// Key is the serialized spatial position.
|
|
// Data is the serialized from of the corresponding block data.
|
|
Block struct {
|
|
Key []byte
|
|
Data []byte
|
|
}
|
|
|
|
// Session is a database session.
|
|
Session interface {
|
|
// Del deletes a block by a given key.
|
|
Del(hash, key []byte) (bool, error)
|
|
// Fetch fetches the block data for a given position.
|
|
Fetch(hash, key []byte) ([]byte, error)
|
|
// InTransaction returns true if a transaction is running.
|
|
InTransaction() bool
|
|
// Store stores a block with a given position and data.
|
|
Store(hash, key, value []byte) (bool, error)
|
|
// AllKeys returns all keys in the database.
|
|
AllKeys(hash []byte, done <-chan struct{}) (<-chan []byte, int, error)
|
|
// SpatialQuery performs a box query between the positions first and second.
|
|
SpatialQuery(hash, first, second []byte, done <-chan struct{}) (<-chan Block, error)
|
|
// BeginTransaction starts a transcation.
|
|
BeginTransaction() error
|
|
// CommitTransaction finishes a transaction.
|
|
CommitTransaction() error
|
|
// Close closes the database session.
|
|
Close() error
|
|
}
|
|
|
|
// Backend is the interface representing a database.
|
|
Backend interface {
|
|
// NewSession opens a new session.
|
|
NewSession() (Session, error)
|
|
// Shutdown shuts down the database server.
|
|
Shutdown() error
|
|
}
|
|
)
|