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Merge pull request #33 from stacklok/cache-references
Add cache implementation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| // | ||
| // Copyright 2023 Stacklok, Inc. | ||
| // | ||
| // 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 utils | ||
|
|
||
| import ( | ||
| "github.com/puzpuzpuz/xsync" | ||
| ) | ||
|
|
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| // RefCacher is an interface for caching references. | ||
| type RefCacher interface { | ||
| Store(key, value string) | ||
| Load(key string) (string, bool) | ||
| } | ||
|
|
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| type refCacher struct { | ||
| cache *xsync.MapOf[string, string] | ||
| } | ||
|
|
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| // NewRefCacher returns a new RefCacher. The default implementation is | ||
| // thread-safe. | ||
| func NewRefCacher() RefCacher { | ||
| return &refCacher{ | ||
| cache: xsync.NewMapOf[string](), | ||
| } | ||
| } | ||
|
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| // Store stores a key-value pair. | ||
| func (r *refCacher) Store(key, value string) { | ||
| r.cache.Store(key, value) | ||
| } | ||
|
|
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| // Load loads a value for a given key. | ||
| func (r *refCacher) Load(key string) (string, bool) { | ||
| return r.cache.Load(key) | ||
| } | ||
|
|
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| type unsafeCacher struct { | ||
| cache map[string]string | ||
| } | ||
|
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| // NewUnsafeCacher returns a new RefCacher that's not thread-safe. | ||
| func NewUnsafeCacher() RefCacher { | ||
| return &unsafeCacher{ | ||
| cache: map[string]string{}, | ||
| } | ||
| } | ||
|
|
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| // Store stores a key-value pair. | ||
| func (r *unsafeCacher) Store(key, value string) { | ||
| r.cache[key] = value | ||
| } | ||
|
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| // Load loads a value for a given key. | ||
| func (r *unsafeCacher) Load(key string) (string, bool) { | ||
| v, ok := r.cache[key] | ||
| return v, ok | ||
| } |