forked from projectcalico/libcalico-go
/
policy.go
113 lines (97 loc) · 3.89 KB
/
policy.go
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// Copyright (c) 2016-2017 Tigera, Inc. All rights reserved.
// 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 client
import (
"github.com/projectcalico/libcalico-go/lib/api"
"github.com/projectcalico/libcalico-go/lib/api/unversioned"
"github.com/projectcalico/libcalico-go/lib/backend/model"
"github.com/projectcalico/libcalico-go/lib/converter"
)
// PolicyInterface has methods to work with Policy resources.
type PolicyInterface interface {
List(api.PolicyMetadata) (*api.PolicyList, error)
Get(api.PolicyMetadata) (*api.Policy, error)
Create(*api.Policy) (*api.Policy, error)
Update(*api.Policy) (*api.Policy, error)
Apply(*api.Policy) (*api.Policy, error)
Delete(api.PolicyMetadata) error
}
// policies implements PolicyInterface
type policies struct {
converter.PolicyConverter
c *Client
}
// newPolicies returns a new PolicyInterface bound to the supplied client.
func newPolicies(c *Client) *policies {
return &policies{c: c}
}
// Create creates a new policy.
func (h *policies) Create(a *api.Policy) (*api.Policy, error) {
return a, h.c.create(*a, h)
}
// Update updates an existing policy.
func (h *policies) Update(a *api.Policy) (*api.Policy, error) {
return a, h.c.update(*a, h)
}
// Apply updates a policy if it exists, or creates a new policy if it does not exist.
func (h *policies) Apply(a *api.Policy) (*api.Policy, error) {
return a, h.c.apply(*a, h)
}
// Delete deletes an existing policy.
func (h *policies) Delete(metadata api.PolicyMetadata) error {
return h.c.delete(metadata, h)
}
// Get returns information about a particular policy.
func (h *policies) Get(metadata api.PolicyMetadata) (*api.Policy, error) {
if a, err := h.c.get(metadata, h); err != nil {
return nil, err
} else {
return a.(*api.Policy), nil
}
}
// List takes a Metadata, and returns a PolicyList that contains the list of policies
// that match the Metadata (wildcarding missing fields).
func (h *policies) List(metadata api.PolicyMetadata) (*api.PolicyList, error) {
l := api.NewPolicyList()
err := h.c.list(metadata, h, l)
return l, err
}
// convertMetadataToListInterface converts a PolicyMetadata to a PolicyListOptions.
// This is part of the conversionHelper interface.
func (h *policies) convertMetadataToListInterface(m unversioned.ResourceMetadata) (model.ListInterface, error) {
pm := m.(api.PolicyMetadata)
l := model.PolicyListOptions{
Name: pm.Name,
}
return l, nil
}
// convertMetadataToKey converts a PolicyMetadata to a PolicyKey
// This is part of the conversionHelper interface. Call through to the shared
// converter (embedded in the policies struct).
func (h *policies) convertMetadataToKey(m unversioned.ResourceMetadata) (model.Key, error) {
return h.ConvertMetadataToKey(m)
}
// convertAPIToKVPair converts an API Policy structure to a KVPair containing a
// backend Policy and PolicyKey.
// This is part of the conversionHelper interface. Call through to the shared
// converter (embedded in the policies struct).
func (h *policies) convertAPIToKVPair(a unversioned.Resource) (*model.KVPair, error) {
return h.ConvertAPIToKVPair(a)
}
// convertKVPairToAPI converts a KVPair containing a backend Policy and PolicyKey
// to an API Policy structure.
// This is part of the conversionHelper interface. Call through to the shared
// converter (embedded in the policies struct).
func (h *policies) convertKVPairToAPI(d *model.KVPair) (unversioned.Resource, error) {
return h.ConvertKVPairToAPI(d)
}