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79 lines
1.7 KiB
79 lines
1.7 KiB
// +build kvdb_etcd |
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package etcd |
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import ( |
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"context" |
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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{}) (context.Context, |
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*Config, error) { |
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if len(args) != 2 { |
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return nil, nil, fmt.Errorf("invalid number of arguments to "+ |
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"%s.%s -- expected: context.Context, etcd.Config", |
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dbType, funcName, |
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) |
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} |
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ctx, ok := args[0].(context.Context) |
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if !ok { |
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return nil, nil, fmt.Errorf("argument 0 to %s.%s is invalid "+ |
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"-- expected: context.Context", |
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dbType, funcName, |
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) |
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} |
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config, ok := args[1].(*Config) |
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if !ok { |
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return nil, nil, fmt.Errorf("argument 1 to %s.%s is invalid -- "+ |
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"expected: etcd.Config", |
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dbType, funcName, |
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) |
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} |
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return ctx, 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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ctx, 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(ctx, *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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ctx, 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(ctx, *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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