mirror of
https://github.com/openziti/ziti.git
synced 2026-09-10 16:55:41 +00:00
Paul Lorenz
52 lines
1.6 KiB
Go
52 lines
1.6 KiB
Go
/*
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Copyright NetFoundry Inc.
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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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https://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 ascode
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import (
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"errors"
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"reflect"
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"github.com/michaelquigley/pfxlog"
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)
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type CacheGetter func(id string) (interface{}, error)
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var log = pfxlog.Logger()
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func GetItemFromCache(c map[string]interface{}, key string, fn CacheGetter) (interface{}, error) {
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if key == "" {
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return nil, errors.New("key is null, can't resolve from cache or get it from source")
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}
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detail, found := c[key]
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if !found {
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log.WithFields(map[string]interface{}{"key": key}).Debug("Item not in cache, getting from source")
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var err error
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detail, err = fn(key)
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if err != nil {
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log.WithFields(map[string]interface{}{"key": key}).WithError(err).Debug("Error reading from source, returning error")
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return nil, errors.Join(errors.New("error reading: "+key), err)
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}
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if detail != nil && !reflect.ValueOf(detail).IsNil() {
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log.WithFields(map[string]interface{}{"key": key, "item": detail}).Debug("Item read from source, caching")
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c[key] = detail
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}
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return detail, nil
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}
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log.WithFields(map[string]interface{}{"key": key}).Debug("Item found in cache")
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return detail, nil
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}
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