blob: e99984a88f68aa3bb77688d26def06a77dad75d7 [file] [log] [blame]
// Copyright 2018 The Goma Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package backend
import (
pb ""
// Backend is interface of backend for frontend.
// TODO: provides switching backend,
// httprpc backend (e.g. to*) and
// remote backend (e.g. to <cluster>.endpoints.<project>
type Backend interface {
Ping() http.Handler
Exec() http.Handler
ByteStream() http.Handler
StoreFile() http.Handler
LookupFile() http.Handler
Execlog() http.Handler
// Option is backend option.
type Option struct {
Auth Auth
APIKeyDir string
// FromProto creates Backend based on cfg.
// returned func will release resources associated with Backend.
func FromProto(ctx context.Context, cfg *pb.BackendConfig, opt Option) (Backend, func(), error) {
switch be := cfg.Backend.(type) {
case *pb.BackendConfig_Local:
return FromLocalBackend(ctx, be.Local, opt)
case *pb.BackendConfig_HttpRpc:
return FromHTTPRPCBackend(ctx, be.HttpRpc)
case *pb.BackendConfig_Remote:
return FromRemoteBackend(ctx, be.Remote, opt)
case *pb.BackendConfig_Rule:
return FromBackendRule(ctx, be.Rule, opt)
case nil:
return nil, func() {}, errors.New("no backend in config")
return nil, func() {}, fmt.Errorf("unknown type in backend: %T", cfg.Backend)