feat: Change service creation and add app name mapping for sessions

This change refactors how session, memory, and artifact services are created in the fast_api server, using the shared service_factory.

Co-authored-by: George Weale <gweale@google.com>
PiperOrigin-RevId: 839997110

tests/unittests/cli/test_fast_api.py

@@ -416,15 +416,15 @@ def test_app(
   with (
       patch("signal.signal", return_value=None),
       patch(
-          "google.adk.cli.fast_api.InMemorySessionService",
+          "google.adk.cli.fast_api.create_session_service_from_options",
           return_value=mock_session_service,
       ),
       patch(
-          "google.adk.cli.fast_api.InMemoryArtifactService",
+          "google.adk.cli.fast_api.create_artifact_service_from_options",
           return_value=mock_artifact_service,
       ),
       patch(
-          "google.adk.cli.fast_api.InMemoryMemoryService",
+          "google.adk.cli.fast_api.create_memory_service_from_options",
           return_value=mock_memory_service,
       ),
       patch(
@@ -556,15 +556,15 @@ def test_app_with_a2a(
   with (
       patch("signal.signal", return_value=None),
       patch(
-          "google.adk.cli.fast_api.InMemorySessionService",
+          "google.adk.cli.fast_api.create_session_service_from_options",
           return_value=mock_session_service,
       ),
       patch(
-          "google.adk.cli.fast_api.InMemoryArtifactService",
+          "google.adk.cli.fast_api.create_artifact_service_from_options",
           return_value=mock_artifact_service,
       ),
       patch(
-          "google.adk.cli.fast_api.InMemoryMemoryService",
+          "google.adk.cli.fast_api.create_memory_service_from_options",
           return_value=mock_memory_service,
       ),
       patch(

tests/unittests/cli/utils/test_local_storage.py

@@ -17,6 +17,7 @@ from __future__ import annotations
 from pathlib import Path
 
 from google.adk.cli.utils.local_storage import create_local_database_session_service
+from google.adk.cli.utils.local_storage import create_local_session_service
 from google.adk.cli.utils.local_storage import PerAgentDatabaseSessionService
 from google.adk.sessions.sqlite_session_service import SqliteSessionService
 import pytest
@@ -48,6 +49,29 @@ async def test_per_agent_session_service_creates_scoped_dot_adk(
   assert agent_b_sessions.sessions[0].app_name == "agent_b"
 
 
+@pytest.mark.asyncio
+async def test_per_agent_session_service_respects_app_name_alias(
+    tmp_path: Path,
+) -> None:
+  folder_name = "agent_folder"
+  logical_name = "custom_app"
+  (tmp_path / folder_name).mkdir()
+
+  service = create_local_session_service(
+      base_dir=tmp_path,
+      per_agent=True,
+      app_name_to_dir={logical_name: folder_name},
+  )
+
+  session = await service.create_session(
+      app_name=logical_name,
+      user_id="user",
+  )
+
+  assert session.app_name == logical_name
+  assert (tmp_path / folder_name / ".adk" / "session.db").exists()
+
+
 def test_create_local_database_session_service_returns_sqlite(
     tmp_path: Path,
 ) -> None:

tests/unittests/cli/utils/test_service_factory.py

@@ -60,6 +60,25 @@ async def test_create_session_service_defaults_to_per_agent_sqlite(
   assert (agent_dir / ".adk" / "session.db").exists()
 
 
+@pytest.mark.asyncio
+async def test_create_session_service_respects_app_name_mapping(
+    tmp_path: Path,
+) -> None:
+  agent_dir = tmp_path / "agent_folder"
+  logical_name = "custom_app"
+  agent_dir.mkdir()
+
+  service = service_factory.create_session_service_from_options(
+      base_dir=tmp_path,
+      app_name_to_dir={logical_name: "agent_folder"},
+  )
+
+  assert isinstance(service, PerAgentDatabaseSessionService)
+  session = await service.create_session(app_name=logical_name, user_id="user")
+  assert session.app_name == logical_name
+  assert (agent_dir / ".adk" / "session.db").exists()
+
+
 def test_create_session_service_fallbacks_to_database(
     tmp_path: Path, monkeypatch
 ):
@@ -101,6 +120,21 @@ def test_create_artifact_service_uses_registry(tmp_path: Path, monkeypatch):
   )
 
 
+def test_create_artifact_service_raises_on_unknown_scheme_when_strict(
+    tmp_path: Path, monkeypatch
+):
+  registry = Mock()
+  registry.create_artifact_service.return_value = None
+  monkeypatch.setattr(service_factory, "get_service_registry", lambda: registry)
+
+  with pytest.raises(ValueError):
+    service_factory.create_artifact_service_from_options(
+        base_dir=tmp_path,
+        artifact_service_uri="unknown://foo",
+        strict_uri=True,
+    )
+
+
 def test_create_memory_service_uses_registry(tmp_path: Path, monkeypatch):
   registry = Mock()
   expected = object()