| // Copyright 2017 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. |
| |
| package revocation |
| |
| import ( |
| "context" |
| |
| "go.chromium.org/luci/common/retry/transient" |
| "go.chromium.org/luci/gae/service/datastore" |
| ) |
| |
| // GenerateTokenID produces an int64 that can be used as a token identifier. |
| // |
| // We reuse datastore ID generator to produce token ids. The tokens are not |
| // actually stored in the datastore. The generated ID sequence is associated |
| // with some entity kind (indicated via 'kind'). If we ever need to restart the |
| // ID sequence, this kind can be changed. |
| func GenerateTokenID(c context.Context, kind string) (int64, error) { |
| // Note: AllocateIDs modifies passed slice in place, by replacing the keys |
| // there. |
| keys := []*datastore.Key{ |
| datastore.NewKey(c, kind, "", 0, nil), |
| } |
| if err := datastore.AllocateIDs(c, keys); err != nil { |
| return 0, transient.Tag.Apply(err) |
| } |
| return keys[0].IntID(), nil |
| } |
