From 7be17c91539f2db930ed339117b589d4f7d500eb Mon Sep 17 00:00:00 2001
From: Jordan Krage <jmank88@gmail.com>
Date: Tue, 14 Nov 2023 07:30:49 -0600
Subject: [PATCH] core/utils: remove unused LazyLoad (#11277)

---
 core/utils/lazy.go      | 36 ---------------------
 core/utils/lazy_test.go | 71 -----------------------------------------
 2 files changed, 107 deletions(-)
 delete mode 100644 core/utils/lazy.go
 delete mode 100644 core/utils/lazy_test.go

diff --git a/core/utils/lazy.go b/core/utils/lazy.go
deleted file mode 100644
index 43e84808159..00000000000
--- a/core/utils/lazy.go
+++ /dev/null
@@ -1,36 +0,0 @@
-package utils
-
-import (
-	"sync"
-)
-
-type LazyLoad[T any] struct {
-	f     func() (T, error)
-	state T
-	ok    bool
-	lock  sync.Mutex
-}
-
-func NewLazyLoad[T any](f func() (T, error)) *LazyLoad[T] {
-	return &LazyLoad[T]{
-		f: f,
-	}
-}
-
-func (l *LazyLoad[T]) Get() (out T, err error) {
-	l.lock.Lock()
-	defer l.lock.Unlock()
-
-	if l.ok {
-		return l.state, nil
-	}
-	l.state, err = l.f()
-	l.ok = err == nil
-	return l.state, err
-}
-
-func (l *LazyLoad[T]) Reset() {
-	l.lock.Lock()
-	defer l.lock.Unlock()
-	l.ok = false
-}
diff --git a/core/utils/lazy_test.go b/core/utils/lazy_test.go
deleted file mode 100644
index 88d02eea7f2..00000000000
--- a/core/utils/lazy_test.go
+++ /dev/null
@@ -1,71 +0,0 @@
-package utils
-
-import (
-	"sync"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestLazyLoad(t *testing.T) {
-	var clientwg sync.WaitGroup
-
-	tc := func() (int, error) {
-		clientwg.Done()
-		return 10, nil
-	}
-
-	// Get should only request a client once, use cached afterward
-	t.Run("get", func(t *testing.T) {
-		clientwg.Add(1) // expect one call to get client
-		c := NewLazyLoad(tc)
-		rw, err := c.Get()
-		assert.NoError(t, err)
-		assert.NotNil(t, rw)
-		assert.NotNil(t, c.state)
-
-		// used cached client
-		rw, err = c.Get()
-		assert.NoError(t, err)
-		assert.NotNil(t, rw)
-		clientwg.Wait()
-	})
-
-	// Clear removes the cached client, should refetch
-	t.Run("clear", func(t *testing.T) {
-		clientwg.Add(2) // expect two calls to get client
-
-		c := NewLazyLoad(tc)
-		rw, err := c.Get()
-		assert.NotNil(t, rw)
-		assert.NoError(t, err)
-
-		c.Reset()
-
-		rw, err = c.Get()
-		assert.NotNil(t, rw)
-		assert.NoError(t, err)
-		clientwg.Wait()
-	})
-
-	// Race checks a race condition of Getting and Clearing a new client
-	t.Run("race", func(t *testing.T) {
-		clientwg.Add(1) // expect one call to get client
-
-		c := NewLazyLoad(tc)
-		var wg sync.WaitGroup
-		wg.Add(2)
-		go func() {
-			rw, err := c.Get()
-			assert.NoError(t, err)
-			assert.NotNil(t, rw)
-			wg.Done()
-		}()
-		go func() {
-			c.Reset()
-			wg.Done()
-		}()
-		wg.Wait()
-		clientwg.Wait()
-	})
-}