| // Copyright Istio 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 locality |
| |
| type Match func(Instance) bool |
| |
| func MatchZone(l Instance) Match { |
| return func(o Instance) bool { |
| return l.Zone == o.Zone && |
| l.Region == o.Region |
| } |
| } |
| |
| func MatchRegion(l Instance) Match { |
| return func(o Instance) bool { |
| return l.Region == o.Region |
| } |
| } |
| |
| func MatchOtherZoneInSameRegion(l Instance) Match { |
| return And(MatchRegion(l), Not(MatchZone(l))) |
| } |
| |
| func And(m1 Match, m2 Match) Match { |
| return func(o Instance) bool { |
| return m1(o) && m2(o) |
| } |
| } |
| |
| func Not(match Match) Match { |
| return func(o Instance) bool { |
| return !match(o) |
| } |
| } |