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78 lines
2.4 KiB
78 lines
2.4 KiB
/*
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Copyright 2016 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package driver // import "k8s.io/helm/pkg/storage/driver"
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import (
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"errors"
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rspb "k8s.io/helm/pkg/proto/hapi/release"
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)
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var (
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// ErrReleaseNotFound indicates that a release is not found.
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ErrReleaseNotFound = errors.New("release: not found")
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// ErrReleaseExists indicates that a release already exists.
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ErrReleaseExists = errors.New("release: already exists")
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// ErrDriverAction indicates the storage driver failed to execute the requested action.
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ErrDriverAction = errors.New("driver: failed to perform action")
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)
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// Creator is the interface that wraps the Create method.
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//
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// Create stores the release or returns ErrReleaseExists
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// if an identical release already exists.
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type Creator interface {
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Create(rls *rspb.Release) error
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}
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// Updator is the interface that wraps the Update method.
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//
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// Update updates an existing release or returns
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// ErrReleaseNotFound if the release does not exist.
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type Updator interface {
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Update(rls *rspb.Release) error
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}
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// Deletor is the interface that wraps the Delete method.
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//
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// Delete deletes the release named by key or returns
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// ErrReleaseNotFound if the release does not exist.
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type Deletor interface {
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Delete(key string) (*rspb.Release, error)
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}
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// Queryor is the interface that wraps the Get and List methods.
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//
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// Get returns the release named by key or returns ErrReleaseNotFound
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// if the release does not exist.
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//
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// List returns the set of all releases that satisfy the filter predicate.
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type Queryor interface {
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Get(key string) (*rspb.Release, error)
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List(filter func(*rspb.Release) bool) ([]*rspb.Release, error)
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}
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// Driver is the interface composed of Creator, Updator, Deletor, Queryor
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// interfaces. It defines the behavior for storing, updating, deleted,
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// and retrieving tiller releases from some underlying storage mechanism,
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// e.g. memory, configmaps.
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type Driver interface {
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Creator
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Updator
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Deletor
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Queryor
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}
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