database

import "git.tcp.direct/tcp.direct/database"

Documentation

type Filer

type Filer interface {

	// Has should return true if the given key has an associated value.
	Has(key []byte) bool
	// Get should retrieve the byte slice corresponding to the given key, and any associated errors upon failure.
	Get(key []byte) ([]byte, error)
	// Put should insert the value data in a way that is associated and can be retrieved by the given key data.
	Put(key []byte, value []byte) error
	// Delete should delete the key and the value associated with the given key, and return an error upon failure.
	Delete(key []byte) error
}

Filer is is a way to implement any generic key/value store. These functions should be plug and play with most of the popular key/value store golang libraries.

NOTE: Many key/value golang libraries will already implement this interface already. This exists for more potential granular control in the case that they don't. Otherwise you'd have to build a wrapper around an existing key/value store to satisfy an overencompassing interface.

type Keeper

type Keeper interface {
	// Path should return the base path where all stores should be stored under. (likely as subdirectories)
	Path() string
	// Init should initialize our Filer at the given path, to be referenced and called by dataStore.
	Init(dataStore []byte) error
	// With provides access to the given dataStore by providing a pointer to the related Filer.
	With(dataStore []byte) Filer
	// Close should safely end any Filer operations of the given dataStore and close any relevant handlers.
	Close(dataStore []byte) error
	// Sync should take any volatile data and solidify it somehow if relevant. (ram to disk in most cases)
	Sync(dataStore []byte) error

	CloseAll() error
	SyncAll() error
}

Keeper will be in charge of the more meta operations involving Filers. This includes operations like initialization, syncing to disk if applicable, and backing up.

type Key

type Key interface {
	Bytes() []byte
	String() string
	Equal(Key) bool
}

Key represents a key in a key/value Filer.

type Searcher

type Searcher interface {
	// AllKeys must retrieve all keys in the datastore with the given storeName.
	AllKeys() []string
	// PrefixScan must return all keys that begin with the given prefix.
	PrefixScan(prefix string) map[string]interface{}
	// Search must be able to search through the contents of our database and return a map of results.
	Search(query string) map[string]interface{}
	// ValueExists searches for an exact match of the given value and returns the key that contains it.
	ValueExists(value []byte) (key []byte, ok bool)
}

Searcher must be able to search through our datastore(s) with strings.

type Value

type Value interface {
	Bytes() []byte
	String() string
	Equal(Value) bool
}

Value represents a value in a key/value Filer.