Improved error handling

Collection.go

@@ -13,7 +13,7 @@ type Collection[T any] interface {
 	Clear()
 	Delete(key string)
 	Exists(key string) bool
-	Get(key string) (value *T, ok bool)
+	Get(key string) (value *T, err error)
 	Set(key string, value *T)
 }
 
@@ -67,9 +67,14 @@ func (c *collection[T]) All() <-chan *T {
 }
 
 // Get returns the value for the given key.
-func (c *collection[T]) Get(key string) (*T, bool) {
+func (c *collection[T]) Get(key string) (*T, error) {
 	value, exists := c.data.Load(key)
-	return value.(*T), exists
+
+	if !exists {
+		return nil, &KeyNotFoundError{Key: key}
+	}
+	
+	return value.(*T), nil
 }
 
 // Set sets the value for the given key.

Collection_test.go

@@ -17,9 +17,9 @@ func TestCollectionGet(t *testing.T) {
 	defer users.Clear()
 
 	users.Set("1", &User{Name: "User 1"})
-	user, exists := users.Get("1")
+	user, err := users.Get("1")
 
-	assert.True(t, exists)
+	assert.Nil(t, err)
 	assert.NotNil(t, user)
 }
 

Errors.go

@@ -0,0 +1,13 @@
+package ocean
+
+import "fmt"
+
+// KeyNotFoundError represents errors for cases where the requested key could not be found.
+type KeyNotFoundError struct {
+	Key string
+}
+
+// Error returns the error message.
+func (e *KeyNotFoundError) Error() string {
+	return fmt.Sprintf("Key not found: %s", e.Key)
+}