| // 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 model |
| |
| import ( |
| "errors" |
| ) |
| |
| import ( |
| "istio.io/pkg/ledger" |
| ) |
| |
| // DisabledLedger is an empty mock of the ledger.Ledger interface |
| // which we will substitute when distribution tracking is disabled. |
| type DisabledLedger struct { |
| ledger.Ledger |
| } |
| |
| func (d *DisabledLedger) Put(key, value string) (string, error) { |
| return "", nil |
| } |
| |
| func (d *DisabledLedger) Delete(key string) error { |
| return nil |
| } |
| |
| func (d *DisabledLedger) Get(key string) (string, error) { |
| return "", nil |
| } |
| |
| func (d *DisabledLedger) RootHash() string { |
| return "" |
| } |
| |
| func (d *DisabledLedger) GetPreviousValue(previousHash, key string) (result string, err error) { |
| return "", errors.New("distribution tracking is disabled") |
| } |