/
proxy_view.go
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/
proxy_view.go
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// Copyright Istio Authors. 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 model
import (
"fmt"
"strings"
"istio.io/istio/pkg/util/identifier"
"istio.io/istio/pkg/util/sets"
)
// ProxyView provides a restricted view of mesh endpoints for a Proxy.
type ProxyView interface {
fmt.Stringer
IsVisible(ep *IstioEndpoint) bool
}
// ProxyViewAll is a ProxyView where all endpoints are visible.
var ProxyViewAll ProxyView = proxyViewAll{}
type proxyViewAll struct{}
func (v proxyViewAll) IsVisible(*IstioEndpoint) bool {
return true
}
func (v proxyViewAll) String() string {
return ""
}
func newProxyView(node *Proxy) ProxyView {
if node == nil || node.Metadata == nil || len(node.Metadata.RequestedNetworkView) == 0 {
return ProxyViewAll
}
// Restrict the view to the requested networks.
return &proxyViewImpl{
visible: sets.New(node.Metadata.RequestedNetworkView...).Insert(identifier.Undefined),
getValue: func(ep *IstioEndpoint) string {
return ep.Network.String()
},
}
}
type proxyViewImpl struct {
visible sets.String
getValue func(ep *IstioEndpoint) string
}
func (v *proxyViewImpl) IsVisible(ep *IstioEndpoint) bool {
return v.visible.Contains(v.getValue(ep))
}
func (v *proxyViewImpl) String() string {
return strings.Join(sets.SortedList(v.visible), ",")
}