forked from p9c/pod-archive
/
driver.go
65 lines (59 loc) · 1.73 KB
/
driver.go
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package ffldb
import (
"fmt"
"github.com/l0k18/pod/pkg/chain/wire"
database "github.com/l0k18/pod/pkg/db"
)
const (
dbType = "ffldb"
)
// parseArgs parses the arguments from the database Open/Create methods.
func parseArgs(funcName string, args ...interface{}) (string, wire.BitcoinNet, error) {
if len(args) != 2 {
return "", 0, fmt.Errorf("invalid arguments to %s.%s -- "+
"expected database path and block network", dbType,
funcName)
}
dbPath, ok := args[0].(string)
if !ok {
return "", 0, fmt.Errorf("first argument to %s.%s is invalid -- "+
"expected database path string", dbType, funcName)
}
network, ok := args[1].(wire.BitcoinNet)
if !ok {
return "", 0, fmt.Errorf("second argument to %s.%s is invalid -- "+
"expected block network", dbType, funcName)
}
return dbPath, network, nil
}
// openDBDriver is the callback provided during driver registration that opens an existing database for use.
func openDBDriver(args ...interface{}) (database.DB, error) {
dbPath, network, err := parseArgs("Open", args...)
if err != nil {
Error(err)
return nil, err
}
return openDB(dbPath, network, false)
}
// createDBDriver is the callback provided during driver registration that creates, initializes, and opens a database
// for use.
func createDBDriver(args ...interface{}) (database.DB, error) {
dbPath, network, err := parseArgs("Create", args...)
if err != nil {
Error(err)
return nil, err
}
return openDB(dbPath, network, true)
}
func init() {
// Register the driver.
driver := database.Driver{
DbType: dbType,
Create: createDBDriver,
Open: openDBDriver,
}
if err := database.RegisterDriver(driver); err != nil {
panic(fmt.Sprintf("Failed to regiser database driver '%s': %v",
dbType, err))
}
}