80 lines
2.0 KiB
Go
80 lines
2.0 KiB
Go
/*
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Copyright 2016 The Fission 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 router
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import (
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"net/url"
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"time"
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"go.uber.org/zap"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"github.com/fission/fission/pkg/cache"
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)
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type (
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functionServiceMap struct {
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logger *zap.Logger
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cache *cache.Cache // map[metadataKey]*url.URL
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}
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// metav1.ObjectMeta is not hashable, so we make a hashable copy
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// of the subset of its fields that are identifiable.
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metadataKey struct {
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Name string
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Namespace string
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ResourceVersion string
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}
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)
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func makeFunctionServiceMap(logger *zap.Logger, expiry time.Duration) *functionServiceMap {
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return &functionServiceMap{
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logger: logger.Named("function_service_map"),
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cache: cache.MakeCache(expiry, 0),
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}
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}
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func keyFromMetadata(m *metav1.ObjectMeta) *metadataKey {
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return &metadataKey{
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Name: m.Name,
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Namespace: m.Namespace,
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ResourceVersion: m.ResourceVersion,
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}
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}
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func (fmap *functionServiceMap) lookup(f *metav1.ObjectMeta) (*url.URL, error) {
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mk := keyFromMetadata(f)
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item, err := fmap.cache.Get(*mk)
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if err != nil {
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return nil, err
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}
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u := item.(*url.URL)
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return u, nil
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}
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func (fmap *functionServiceMap) assign(f *metav1.ObjectMeta, serviceURL *url.URL) {
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mk := keyFromMetadata(f)
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old, err := fmap.cache.Set(*mk, serviceURL)
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if err != nil {
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if *serviceURL == *(old.(*url.URL)) {
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return
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}
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fmap.logger.Error("error caching service url for function with a different value", zap.Error(err))
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// ignore error
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}
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}
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