85aee9b064
This commit separates all etcd related sources (sans a few stubs and config) from the rest of the source tree and makes compilation conditional depending on whether the kvdb_etcd build tag is specified.
69 lines
1.5 KiB
Go
69 lines
1.5 KiB
Go
// +build kvdb_etcd
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package etcd
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import (
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"fmt"
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"github.com/btcsuite/btcwallet/walletdb"
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)
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const (
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dbType = "etcd"
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)
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// parseArgs parses the arguments from the walletdb Open/Create methods.
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func parseArgs(funcName string, args ...interface{}) (*BackendConfig, error) {
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if len(args) != 1 {
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return nil, fmt.Errorf("invalid number of arguments to %s.%s -- "+
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"expected: etcd.BackendConfig",
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dbType, funcName,
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)
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}
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config, ok := args[0].(BackendConfig)
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if !ok {
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return nil, fmt.Errorf("argument to %s.%s is invalid -- "+
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"expected: etcd.BackendConfig",
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dbType, funcName,
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)
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}
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return &config, nil
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}
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// createDBDriver is the callback provided during driver registration that
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// creates, initializes, and opens a database for use.
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func createDBDriver(args ...interface{}) (walletdb.DB, error) {
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config, err := parseArgs("Create", args...)
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if err != nil {
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return nil, err
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}
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return newEtcdBackend(*config)
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}
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// openDBDriver is the callback provided during driver registration that opens
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// an existing database for use.
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func openDBDriver(args ...interface{}) (walletdb.DB, error) {
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config, err := parseArgs("Open", args...)
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if err != nil {
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return nil, err
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}
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return newEtcdBackend(*config)
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}
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func init() {
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// Register the driver.
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driver := walletdb.Driver{
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DbType: dbType,
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Create: createDBDriver,
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Open: openDBDriver,
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}
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if err := walletdb.RegisterDriver(driver); err != nil {
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panic(fmt.Sprintf("Failed to regiser database driver '%s': %v",
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dbType, err))
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}
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}
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