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| 1 // Copyright 2015 The LUCI Authors. All rights reserved. | 1 // Copyright 2015 The LUCI Authors. All rights reserved. |
| 2 // Use of this source code is governed under the Apache License, Version 2.0 | 2 // Use of this source code is governed under the Apache License, Version 2.0 |
| 3 // that can be found in the LICENSE file. | 3 // that can be found in the LICENSE file. |
| 4 | 4 |
| 5 package txnBuf | 5 package txnBuf |
| 6 | 6 |
| 7 import ( | 7 import ( |
| 8 "golang.org/x/net/context" | 8 "golang.org/x/net/context" |
| 9 | 9 |
| 10 ds "github.com/luci/gae/service/datastore" | 10 ds "github.com/luci/gae/service/datastore" |
| (...skipping 27 matching lines...) Expand all Loading... |
| 38 } | 38 } |
| 39 } | 39 } |
| 40 | 40 |
| 41 // memoryCorruption is a marker function to indicate that given error is | 41 // memoryCorruption is a marker function to indicate that given error is |
| 42 // actually due to corrupted memory to make it easier to read the code. | 42 // actually due to corrupted memory to make it easier to read the code. |
| 43 func memoryCorruption(err error) { | 43 func memoryCorruption(err error) { |
| 44 if err != nil { | 44 if err != nil { |
| 45 panic(err) | 45 panic(err) |
| 46 } | 46 } |
| 47 } | 47 } |
| 48 | |
| 49 // GetNoTxn allows you to to escape the buffered transaction (if any), and get | |
| 50 // a non-transactional handle to the datastore. This does not invalidate the | |
| 51 // currently-buffered transaction, but it also does not see any effects of it. | |
| 52 // | |
| 53 // TODO(iannucci): This is messy, but mostly because the way that transactions | |
| 54 // work is messy. Fixing luci/gae#issues/23 would help though, because it means | |
| 55 // we could make transactionality recorded by a single index in the context | |
| 56 // instead of relying on function nesting. | |
| 57 func GetNoTxn(c context.Context) ds.Interface { | |
| 58 c = context.WithValue(c, dsTxnBufParent, nil) | |
| 59 c = context.WithValue(c, dsTxnBufHaveLock, nil) | |
| 60 return ds.GetNoTxn(c) | |
| 61 } | |
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