diff --git a/src/main/java/fr/iut_fbleau/but3/dev62/mylibrary/commande/repository/ComandeRepository.java b/src/main/java/fr/iut_fbleau/but3/dev62/mylibrary/commande/repository/ComandeRepository.java
new file mode 100644
index 0000000..9195f08
--- /dev/null
+++ b/src/main/java/fr/iut_fbleau/but3/dev62/mylibrary/commande/repository/ComandeRepository.java
@@ -0,0 +1,36 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.commande.repository;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.book.entity.Book;
+import fr.iut_fbleau.but3.dev62.mylibrary.commande.entity.Commande;
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.entity.Customer;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public class ComandeRepository {
+
+    private final List<Commande> commande = new ArrayList<>();
+
+    public List<Commande> findAll(){return commande;}
+
+    public Commande save(Commande newCommande){
+        Optional<Commande> optionalCommandeWithSameIsbn = this.findById(newCommande.getCommandeId());
+        optionalCommandeWithSameIsbn.ifPresent(commande::remove);
+        this.commande.add(newCommande);
+        return newCommande;
+    }
+
+    public Optional<Commande> findById(UUID uuid){
+        return this.commande.stream()
+                .filter(customer -> customer.getCommandeId().equals(uuid))
+                .findFirst();
+    }
+
+    public boolean existsById(UUID uuid) {
+        return this.commande.stream()
+                .anyMatch(customer -> customer.getCommandeId().equals(uuid));
+    }
+
+}