fix : server problem with llamacpp

server/sources/llamacpp.py

@@ -9,13 +9,15 @@ class LlamacppLLM(GeneratorLLM):
         Handle generation using llama.cpp
         """
         super().__init__()
-        self.llm = Llama.from_pretrained(
-            repo_id=self.model,
-            filename="*q8_0.gguf",
-            verbose=True
-        )
+        self.llm = None
     
     def generate(self, history):
+        if self.model is None:
+            self.llm = Llama.from_pretrained(
+                repo_id=self.model,
+                filename="*q8_0.gguf",
+                verbose=True
+            )
         self.logger.info(f"Using {self.model} for generation with Llama.cpp")
         self.llm.create_chat_completion(
               messages = history