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util.go
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util.go
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// 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 serviceentry
import (
"k8s.io/apimachinery/pkg/types"
networking "istio.io/api/networking/v1alpha3"
"istio.io/istio/pkg/config"
"istio.io/istio/pkg/config/labels"
)
func getWorkloadServiceEntries(ses []config.Config, wle *networking.WorkloadEntry) map[types.NamespacedName]*config.Config {
out := make(map[types.NamespacedName]*config.Config)
for i, cfg := range ses {
se := cfg.Spec.(*networking.ServiceEntry)
if se.WorkloadSelector != nil && labels.Instance(se.WorkloadSelector.Labels).Match(wle.Labels) {
out[cfg.NamespacedName()] = &ses[i]
}
}
return out
}
// returns a set of objects that are in `old` but not in `curr`
// For example:
// old = {a1, a2, a3}
// curr = {a1, a2, a4, a5}
// difference(old, curr) = {a3}
func difference(old, curr map[types.NamespacedName]*config.Config) []types.NamespacedName {
var out []types.NamespacedName
for key := range old {
if _, ok := curr[key]; !ok {
out = append(out, key)
}
}
return out
}