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46 changes: 46 additions & 0 deletions
46
internal/resources/providers/gcplib/inventory/map_cache.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| // Licensed to Elasticsearch B.V. under one or more contributor | ||
| // license agreements. See the NOTICE file distributed with | ||
| // this work for additional information regarding copyright | ||
| // ownership. Elasticsearch B.V. licenses this file to you 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 inventory | ||
|
|
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| import ( | ||
| "sync" | ||
| ) | ||
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| type MapCache[T any] struct { | ||
| results map[string]T | ||
| mu sync.Mutex | ||
| } | ||
|
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| func (c *MapCache[T]) Get(fn func() T, key string) T { | ||
| c.mu.Lock() | ||
| defer c.mu.Unlock() | ||
|
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| if value, ok := c.results[key]; ok { | ||
| return value | ||
| } | ||
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| value := fn() | ||
| c.results[key] = value | ||
| return value | ||
| } | ||
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| func NewMapCache[T any]() *MapCache[T] { | ||
| return &MapCache[T]{ | ||
| results: make(map[string]T), | ||
| } | ||
| } |
63 changes: 63 additions & 0 deletions
63
internal/resources/providers/gcplib/inventory/map_cache_test.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| // Licensed to Elasticsearch B.V. under one or more contributor | ||
| // license agreements. See the NOTICE file distributed with | ||
| // this work for additional information regarding copyright | ||
| // ownership. Elasticsearch B.V. licenses this file to you 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. | ||
|
|
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| package inventory | ||
|
|
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| import ( | ||
| "sync" | ||
| "testing" | ||
|
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| "github.com/stretchr/testify/assert" | ||
| "github.com/stretchr/testify/mock" | ||
| ) | ||
|
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| type MockFunction struct { | ||
| mock.Mock | ||
| } | ||
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| func (m *MockFunction) GetSomeValue() int { | ||
| m.Called() | ||
| return 0 | ||
| } | ||
|
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| func TestMapCacheGet(t *testing.T) { | ||
| cache := NewMapCache[int]() | ||
|
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| // Test getting existing value from cache | ||
| cache.results["key1"] = 42 | ||
| mockFunction := new(MockFunction) | ||
| result := cache.Get(mockFunction.GetSomeValue, "key1") | ||
| mockFunction.AssertNotCalled(t, "GetSomeValue") | ||
| assert.Equal(t, 42, result) | ||
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| // Test getting non-existing value from cache | ||
| mockFunction.On("GetSomeValue").Return(mockFunction.GetSomeValue()) | ||
| result = cache.Get(mockFunction.GetSomeValue, "key2") | ||
| mockFunction.AssertNumberOfCalls(t, "GetSomeValue", 2) // 1 by Return(), 2nd by cache.Get() | ||
| assert.Equal(t, 0, result) | ||
|
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| // Test concurrent accesses | ||
| var wg sync.WaitGroup | ||
| for i := 0; i < 100; i++ { | ||
| wg.Add(1) | ||
| go func() { | ||
| defer wg.Done() | ||
| cache.Get(func() int { return 1 }, "concurrent_key") | ||
| }() | ||
| } | ||
| wg.Wait() | ||
| } |
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