| /* |
| Copyright 2016 The Kubernetes 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 etcd3 |
| |
| import ( |
| "k8s.io/apimachinery/pkg/api/errors" |
| |
| etcdrpc "github.com/coreos/etcd/etcdserver/api/v3rpc/rpctypes" |
| utilruntime "k8s.io/apimachinery/pkg/util/runtime" |
| ) |
| |
| func interpretWatchError(err error) error { |
| switch { |
| case err == etcdrpc.ErrCompacted: |
| return errors.NewResourceExpired("The resourceVersion for the provided watch is too old.") |
| } |
| return err |
| } |
| |
| const ( |
| expired string = "The resourceVersion for the provided list is too old." |
| continueExpired string = "The provided continue parameter is too old " + |
| "to display a consistent list result. You can start a new list without " + |
| "the continue parameter." |
| inconsistentContinue string = "The provided continue parameter is too old " + |
| "to display a consistent list result. You can start a new list without " + |
| "the continue parameter, or use the continue token in this response to " + |
| "retrieve the remainder of the results. Continuing with the provided " + |
| "token results in an inconsistent list - objects that were created, " + |
| "modified, or deleted between the time the first chunk was returned " + |
| "and now may show up in the list." |
| ) |
| |
| func interpretListError(err error, paging bool, continueKey, keyPrefix string) error { |
| switch { |
| case err == etcdrpc.ErrCompacted: |
| if paging { |
| return handleCompactedErrorForPaging(continueKey, keyPrefix) |
| } |
| return errors.NewResourceExpired(expired) |
| } |
| return err |
| } |
| |
| func handleCompactedErrorForPaging(continueKey, keyPrefix string) error { |
| // continueToken.ResoureVersion=-1 means that the apiserver can |
| // continue the list at the latest resource version. We don't use rv=0 |
| // for this purpose to distinguish from a bad token that has empty rv. |
| newToken, err := encodeContinue(continueKey, keyPrefix, -1) |
| if err != nil { |
| utilruntime.HandleError(err) |
| return errors.NewResourceExpired(continueExpired) |
| } |
| statusError := errors.NewResourceExpired(inconsistentContinue) |
| statusError.ErrStatus.ListMeta.Continue = newToken |
| return statusError |
| } |