From 8c12c6939aab9106db14ec2d11d983bc5b29fb2c Mon Sep 17 00:00:00 2001
From: Niall Sheridan <nsheridan@gmail.com>
Date: Sun, 7 Jul 2019 21:33:44 +0100
Subject: Switch to modules

---
 .../appengine/internal/transaction.go              | 115 ---------------------
 1 file changed, 115 deletions(-)
 delete mode 100644 vendor/google.golang.org/appengine/internal/transaction.go

(limited to 'vendor/google.golang.org/appengine/internal/transaction.go')

diff --git a/vendor/google.golang.org/appengine/internal/transaction.go b/vendor/google.golang.org/appengine/internal/transaction.go
deleted file mode 100644
index 9006ae6..0000000
--- a/vendor/google.golang.org/appengine/internal/transaction.go
+++ /dev/null
@@ -1,115 +0,0 @@
-// Copyright 2014 Google Inc. All rights reserved.
-// Use of this source code is governed by the Apache 2.0
-// license that can be found in the LICENSE file.
-
-package internal
-
-// This file implements hooks for applying datastore transactions.
-
-import (
-	"errors"
-	"reflect"
-
-	"github.com/golang/protobuf/proto"
-	netcontext "golang.org/x/net/context"
-
-	basepb "google.golang.org/appengine/internal/base"
-	pb "google.golang.org/appengine/internal/datastore"
-)
-
-var transactionSetters = make(map[reflect.Type]reflect.Value)
-
-// RegisterTransactionSetter registers a function that sets transaction information
-// in a protocol buffer message. f should be a function with two arguments,
-// the first being a protocol buffer type, and the second being *datastore.Transaction.
-func RegisterTransactionSetter(f interface{}) {
-	v := reflect.ValueOf(f)
-	transactionSetters[v.Type().In(0)] = v
-}
-
-// applyTransaction applies the transaction t to message pb
-// by using the relevant setter passed to RegisterTransactionSetter.
-func applyTransaction(pb proto.Message, t *pb.Transaction) {
-	v := reflect.ValueOf(pb)
-	if f, ok := transactionSetters[v.Type()]; ok {
-		f.Call([]reflect.Value{v, reflect.ValueOf(t)})
-	}
-}
-
-var transactionKey = "used for *Transaction"
-
-func transactionFromContext(ctx netcontext.Context) *transaction {
-	t, _ := ctx.Value(&transactionKey).(*transaction)
-	return t
-}
-
-func withTransaction(ctx netcontext.Context, t *transaction) netcontext.Context {
-	return netcontext.WithValue(ctx, &transactionKey, t)
-}
-
-type transaction struct {
-	transaction pb.Transaction
-	finished    bool
-}
-
-var ErrConcurrentTransaction = errors.New("internal: concurrent transaction")
-
-func RunTransactionOnce(c netcontext.Context, f func(netcontext.Context) error, xg bool, readOnly bool, previousTransaction *pb.Transaction) (*pb.Transaction, error) {
-	if transactionFromContext(c) != nil {
-		return nil, errors.New("nested transactions are not supported")
-	}
-
-	// Begin the transaction.
-	t := &transaction{}
-	req := &pb.BeginTransactionRequest{
-		App: proto.String(FullyQualifiedAppID(c)),
-	}
-	if xg {
-		req.AllowMultipleEg = proto.Bool(true)
-	}
-	if previousTransaction != nil {
-		req.PreviousTransaction = previousTransaction
-	}
-	if readOnly {
-		req.Mode = pb.BeginTransactionRequest_READ_ONLY.Enum()
-	} else {
-		req.Mode = pb.BeginTransactionRequest_READ_WRITE.Enum()
-	}
-	if err := Call(c, "datastore_v3", "BeginTransaction", req, &t.transaction); err != nil {
-		return nil, err
-	}
-
-	// Call f, rolling back the transaction if f returns a non-nil error, or panics.
-	// The panic is not recovered.
-	defer func() {
-		if t.finished {
-			return
-		}
-		t.finished = true
-		// Ignore the error return value, since we are already returning a non-nil
-		// error (or we're panicking).
-		Call(c, "datastore_v3", "Rollback", &t.transaction, &basepb.VoidProto{})
-	}()
-	if err := f(withTransaction(c, t)); err != nil {
-		return &t.transaction, err
-	}
-	t.finished = true
-
-	// Commit the transaction.
-	res := &pb.CommitResponse{}
-	err := Call(c, "datastore_v3", "Commit", &t.transaction, res)
-	if ae, ok := err.(*APIError); ok {
-		/* TODO: restore this conditional
-		if appengine.IsDevAppServer() {
-		*/
-		// The Python Dev AppServer raises an ApplicationError with error code 2 (which is
-		// Error.CONCURRENT_TRANSACTION) and message "Concurrency exception.".
-		if ae.Code == int32(pb.Error_BAD_REQUEST) && ae.Detail == "ApplicationError: 2 Concurrency exception." {
-			return &t.transaction, ErrConcurrentTransaction
-		}
-		if ae.Code == int32(pb.Error_CONCURRENT_TRANSACTION) {
-			return &t.transaction, ErrConcurrentTransaction
-		}
-	}
-	return &t.transaction, err
-}
-- 
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