56 lines
1.5 KiB
Go
56 lines
1.5 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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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 replicapreferences
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import (
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"encoding/json"
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"k8s.io/apimachinery/pkg/api/meta"
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"k8s.io/apimachinery/pkg/runtime"
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fed "k8s.io/kubernetes/federation/apis/federation"
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)
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// GetAllocationPreferences reads the preferences from the annotations on the given object.
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// It takes in an object and determines the supported types.
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// Callers need to pass the string key used to store the annotations.
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// Returns nil if the annotations with the given key are not found.
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func GetAllocationPreferences(obj runtime.Object, key string) (*fed.ReplicaAllocationPreferences, error) {
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if obj == nil {
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return nil, nil
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}
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accessor, err := meta.Accessor(obj)
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if err != nil {
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return nil, err
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}
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annotations := accessor.GetAnnotations()
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if annotations == nil {
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return nil, nil
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}
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prefString, found := annotations[key]
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if !found {
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return nil, nil
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}
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var pref fed.ReplicaAllocationPreferences
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if err := json.Unmarshal([]byte(prefString), &pref); err != nil {
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return nil, err
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}
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return &pref, nil
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}
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