persist registered objects with distribution (#354)

* persist registered objects with distribution

* linter fixes

* comment

* use annotate and field discriminator

* workign tests

* donot use global state

* precommit failures fixed

* add back Any

* fix imports

* remove unnecessary changes in ollama

* precommit failures fixed

* make kvstore configurable for dist and rename registry

* add comment about registry list return

* fix linter errors

* use registry to hydrate

* remove debug print

* linter fixes

* remove kvstore.db

* rename distribution_registry_store

---------

Co-authored-by: Dinesh Yeduguru <dineshyv@fb.com>

llama_stack/distribution/store/tests/test_registry.py

@@ -0,0 +1,171 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+import os
+
+import pytest
+import pytest_asyncio
+from llama_stack.distribution.store import *  # noqa F403
+from llama_stack.apis.inference import ModelDefWithProvider
+from llama_stack.apis.memory_banks import VectorMemoryBankDef
+from llama_stack.providers.utils.kvstore import kvstore_impl, SqliteKVStoreConfig
+from llama_stack.distribution.datatypes import *  # noqa F403
+
+
+@pytest.fixture
+def config():
+    config = SqliteKVStoreConfig(db_path="/tmp/test_registry.db")
+    if os.path.exists(config.db_path):
+        os.remove(config.db_path)
+    return config
+
+
+@pytest_asyncio.fixture
+async def registry(config):
+    registry = DiskDistributionRegistry(await kvstore_impl(config))
+    await registry.initialize()
+    return registry
+
+
+@pytest_asyncio.fixture
+async def cached_registry(config):
+    registry = CachedDiskDistributionRegistry(await kvstore_impl(config))
+    await registry.initialize()
+    return registry
+
+
+@pytest.fixture
+def sample_bank():
+    return VectorMemoryBankDef(
+        identifier="test_bank",
+        embedding_model="all-MiniLM-L6-v2",
+        chunk_size_in_tokens=512,
+        overlap_size_in_tokens=64,
+        provider_id="test-provider",
+    )
+
+
+@pytest.fixture
+def sample_model():
+    return ModelDefWithProvider(
+        identifier="test_model",
+        llama_model="Llama3.2-3B-Instruct",
+        provider_id="test-provider",
+    )
+
+
+@pytest.mark.asyncio
+async def test_registry_initialization(registry):
+    # Test empty registry
+    results = await registry.get("nonexistent")
+    assert len(results) == 0
+
+
+@pytest.mark.asyncio
+async def test_basic_registration(registry, sample_bank, sample_model):
+    print(f"Registering {sample_bank}")
+    await registry.register(sample_bank)
+    print(f"Registering {sample_model}")
+    await registry.register(sample_model)
+    print("Getting bank")
+    results = await registry.get("test_bank")
+    assert len(results) == 1
+    result_bank = results[0]
+    assert result_bank.identifier == sample_bank.identifier
+    assert result_bank.embedding_model == sample_bank.embedding_model
+    assert result_bank.chunk_size_in_tokens == sample_bank.chunk_size_in_tokens
+    assert result_bank.overlap_size_in_tokens == sample_bank.overlap_size_in_tokens
+    assert result_bank.provider_id == sample_bank.provider_id
+
+    results = await registry.get("test_model")
+    assert len(results) == 1
+    result_model = results[0]
+    assert result_model.identifier == sample_model.identifier
+    assert result_model.llama_model == sample_model.llama_model
+    assert result_model.provider_id == sample_model.provider_id
+
+
+@pytest.mark.asyncio
+async def test_cached_registry_initialization(config, sample_bank, sample_model):
+    # First populate the disk registry
+    disk_registry = DiskDistributionRegistry(await kvstore_impl(config))
+    await disk_registry.initialize()
+    await disk_registry.register(sample_bank)
+    await disk_registry.register(sample_model)
+
+    # Test cached version loads from disk
+    cached_registry = CachedDiskDistributionRegistry(await kvstore_impl(config))
+    await cached_registry.initialize()
+
+    results = await cached_registry.get("test_bank")
+    assert len(results) == 1
+    result_bank = results[0]
+    assert result_bank.identifier == sample_bank.identifier
+    assert result_bank.embedding_model == sample_bank.embedding_model
+    assert result_bank.chunk_size_in_tokens == sample_bank.chunk_size_in_tokens
+    assert result_bank.overlap_size_in_tokens == sample_bank.overlap_size_in_tokens
+    assert result_bank.provider_id == sample_bank.provider_id
+
+
+@pytest.mark.asyncio
+async def test_cached_registry_updates(config):
+    cached_registry = CachedDiskDistributionRegistry(await kvstore_impl(config))
+    await cached_registry.initialize()
+
+    new_bank = VectorMemoryBankDef(
+        identifier="test_bank_2",
+        embedding_model="all-MiniLM-L6-v2",
+        chunk_size_in_tokens=256,
+        overlap_size_in_tokens=32,
+        provider_id="baz",
+    )
+    await cached_registry.register(new_bank)
+
+    # Verify in cache
+    results = await cached_registry.get("test_bank_2")
+    assert len(results) == 1
+    result_bank = results[0]
+    assert result_bank.identifier == new_bank.identifier
+    assert result_bank.provider_id == new_bank.provider_id
+
+    # Verify persisted to disk
+    new_registry = DiskDistributionRegistry(await kvstore_impl(config))
+    await new_registry.initialize()
+    results = await new_registry.get("test_bank_2")
+    assert len(results) == 1
+    result_bank = results[0]
+    assert result_bank.identifier == new_bank.identifier
+    assert result_bank.provider_id == new_bank.provider_id
+
+
+@pytest.mark.asyncio
+async def test_duplicate_provider_registration(config):
+    cached_registry = CachedDiskDistributionRegistry(await kvstore_impl(config))
+    await cached_registry.initialize()
+
+    original_bank = VectorMemoryBankDef(
+        identifier="test_bank_2",
+        embedding_model="all-MiniLM-L6-v2",
+        chunk_size_in_tokens=256,
+        overlap_size_in_tokens=32,
+        provider_id="baz",
+    )
+    await cached_registry.register(original_bank)
+
+    duplicate_bank = VectorMemoryBankDef(
+        identifier="test_bank_2",
+        embedding_model="different-model",
+        chunk_size_in_tokens=128,
+        overlap_size_in_tokens=16,
+        provider_id="baz",  # Same provider_id
+    )
+    await cached_registry.register(duplicate_bank)
+
+    results = await cached_registry.get("test_bank_2")
+    assert len(results) == 1  # Still only one result
+    assert (
+        results[0].embedding_model == original_bank.embedding_model
+    )  # Original values preserved