| // Copyright 2020 The LUCI Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| // Datastore contains Transactional Enqueue support for Cloud Datastore. |
| // |
| // Importing this package adds Cloud Datastore transactions support to |
| // server/tq's AddTask. Depends on "go.chromium.org/luci/gae/filter/txndefer" filter |
| // installed. It is installed by default in LUCI server contexts. |
| // |
| // This package is normally imported unnamed: |
| // import _ "go.chromium.org/luci/server/tq/txn/datastore" |
| // |
| // Will take ownership of entities with kinds "tq.*" (e.g. "tq.Reminder"). |
| package datastore |
| |
| import ( |
| "context" |
| |
| "go.chromium.org/luci/gae/service/datastore" |
| |
| "go.chromium.org/luci/server/gaeemulation" |
| "go.chromium.org/luci/server/tq/internal/db" |
| "go.chromium.org/luci/server/tq/internal/lessor" |
| ) |
| |
| var impl dsDB |
| |
| func init() { |
| db.Register(db.Impl{ |
| Kind: impl.Kind(), |
| Module: gaeemulation.ModuleName, |
| ProbeForTxn: func(ctx context.Context) db.DB { |
| if datastore.CurrentTransaction(ctx) != nil { |
| return impl |
| } |
| return nil |
| }, |
| NonTxn: func(ctx context.Context) db.DB { |
| return impl |
| }, |
| }) |
| } |
| |
| func init() { |
| lessor.Register("datastore", func(context.Context) (lessor.Lessor, error) { |
| return &dsLessor{}, nil |
| }) |
| } |