refactor component path

Signed-off-by: Francisco Javier Arceo <farceo@redhat.com>

llama_stack/apis/common/errors.py

@@ -4,6 +4,11 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
+# Custom Llama Stack Exception classes should follow the following schema
+#   1. All classes should inherit from an existing Built-In Exception class: https://docs.python.org/3/library/exceptions.html
+#   2. All classes should have a custom error message with the goal of informing the Llama Stack user specifically
+#   3. All classes should propogate the inherited __init__ function otherwise via 'super().__init__(message)'
+
 
 class UnsupportedModelError(ValueError):
     """raised when model is not present in the list of supported models"""
@@ -11,3 +16,27 @@ class UnsupportedModelError(ValueError):
     def __init__(self, model_name: str, supported_models_list: list[str]):
         message = f"'{model_name}' model is not supported. Supported models are: {', '.join(supported_models_list)}"
         super().__init__(message)
+
+
+class ModelNotFoundError(ValueError):
+    """raised when Llama Stack cannot find a referenced model"""
+
+    def __init__(self, model_name: str) -> None:
+        message = f"Model '{model_name}' not found. Use client.models.list() to list available models."
+        super().__init__(message)
+
+
+class VectorStoreNotFoundError(ValueError):
+    """raised when Llama Stack cannot find a referenced vector store"""
+
+    def __init__(self, vector_store_name: str) -> None:
+        message = f"Vector store '{vector_store_name}' not found. Use client.vector_dbs.list() to list available vector stores."
+        super().__init__(message)
+
+
+class DatasetNotFoundError(ValueError):
+    """raised when Llama Stack cannot find a referenced dataset"""
+
+    def __init__(self, dataset_name: str) -> None:
+        message = f"Dataset '{dataset_name}' not found. Use client.datasets.list() to list available datasets."
+        super().__init__(message)