| // 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 readonly implements a filter that enforces read-only accesses to |
| // services. |
| // |
| // This can be useful in hybrid environments where one cluster wants to read |
| // from a cache-backed datastore, but cannot modify the cache, so reads are safe |
| // and direct, but writes would create a state where the cached values are |
| // invalid. |
| // |
| // This happens when mixing AppEngine datastore/memcache with Cloud Datastore |
| // readers. |
| package readonly |
