feat: expose retry params in partition via api (#3724)

This PR:
- adds parameters to control the retry-mechanism behaviour for
`partition_via_api`:
```
    retries_initial_interval: [int] = None,
    retries_max_interval: Optional[int] = None,
    retries_exponent: Optional[float] = None,
    retries_max_elapsed_time: Optional[int] = None,
    retries_connection_errors: Optional[bool] = None,
```
- adds tests that check using them according to defaults

Author: pawel-kmiecik

Diff for: CHANGELOG.md

@@ -1,9 +1,10 @@
-## 0.16.1-dev6
+## 0.16.1-dev7
 
 ### Enhancements
 
 * **Bump `unstructured-inference` to 0.7.39** and upgrade other dependencies
 * **Round coordinates** Round coordinates when computing bounding box overlaps in `pdfminer_processing.py` to nearest machine precision. This can help reduce underterministic behavior from machine precision that affects which bounding boxes to combine.
+* **Request retry parameters in `partition_via_api` function.** Expose retry-mechanism related parameters in the `partition_via_api` function to allow users to configure the retry behavior of the API requests.
 
 ### Features
 

Diff for: test_unstructured/partition/test_api.py

@@ -4,16 +4,24 @@
 import os
 import pathlib
 from typing import Any
+from unittest.mock import Mock
 
 import pytest
 import requests
 from unstructured_client.general import General
 from unstructured_client.models import shared
 from unstructured_client.models.operations import PartitionRequest
 from unstructured_client.models.shared import PartitionParameters
+from unstructured_client.utils import retries
 
 from unstructured.documents.elements import ElementType, NarrativeText
-from unstructured.partition.api import partition_multiple_via_api, partition_via_api
+from unstructured.partition.api import (
+    DEFAULT_RETRIES_MAX_ELAPSED_TIME_SEC,
+    DEFAULT_RETRIES_MAX_INTERVAL_SEC,
+    get_retries_config,
+    partition_multiple_via_api,
+    partition_via_api,
+)
 
 from ..unit_utils import ANY, FixtureRequest, example_doc_path, method_mock
 
@@ -180,13 +188,110 @@ def test_partition_via_api_image_block_extraction():
         assert isinstance(image_data, bytes)
 
 
+@pytest.mark.skipif(not is_in_ci, reason="Skipping test run outside of CI")
+@pytest.mark.skipif(skip_not_on_main, reason="Skipping test run outside of main branch")
+def test_partition_via_api_retries_config():
+    elements = partition_via_api(
+        filename=example_doc_path("pdf/embedded-images-tables.pdf"),
+        strategy="fast",
+        api_key=get_api_key(),
+        # The url has changed since the 06/24 API release while the sdk defaults to the old url
+        api_url=API_URL,
+        retries_initial_interval=5,
+        retries_max_interval=15,
+        retries_max_elapsed_time=100,
+        retries_connection_errors=True,
+        retries_exponent=1.5,
+    )
+
+    assert len(elements) > 0
+
+
 # Note(austin) - This test is way too noisy against the hosted api
 # def test_partition_via_api_invalid_request_data_kwargs():
 #     filename = os.path.join(DIRECTORY, "..", "..", "example-docs", "layout-parser-paper-fast.pdf")
 #     with pytest.raises(SDKError):
 #         partition_via_api(filename=filename, strategy="not_a_strategy")
 
 
+def test_retries_config_with_parameters_set():
+    sdk = Mock()
+    retries_config = get_retries_config(
+        retries_connection_errors=True,
+        retries_exponent=1.75,
+        retries_initial_interval=20,
+        retries_max_elapsed_time=1000,
+        retries_max_interval=100,
+        sdk=sdk,
+    )
+
+    assert retries_config.retry_connection_errors
+    assert retries_config.backoff.exponent == 1.75
+    assert retries_config.backoff.initial_interval == 20
+    assert retries_config.backoff.max_elapsed_time == 1000
+    assert retries_config.backoff.max_interval == 100
+
+
+def test_retries_config_none_parameters_return_empty_config():
+    sdk = Mock()
+    retries_config = get_retries_config(
+        retries_connection_errors=None,
+        retries_exponent=None,
+        retries_initial_interval=None,
+        retries_max_elapsed_time=None,
+        retries_max_interval=None,
+        sdk=sdk,
+    )
+
+    assert retries_config is None
+
+
+def test_retries_config_with_no_parameters_set():
+    retry_config = retries.RetryConfig(
+        "backoff", retries.BackoffStrategy(3000, 720000, 1.88, 1800000), True
+    )
+    sdk = Mock()
+    sdk.sdk_configuration.retry_config = retry_config
+    retries_config = get_retries_config(
+        retries_connection_errors=True,
+        retries_exponent=None,
+        retries_initial_interval=None,
+        retries_max_elapsed_time=None,
+        retries_max_interval=None,
+        sdk=sdk,
+    )
+
+    assert retries_config.retry_connection_errors
+    assert retries_config.backoff.exponent == 1.88
+    assert retries_config.backoff.initial_interval == 3000
+    assert retries_config.backoff.max_elapsed_time == 1800000
+    assert retries_config.backoff.max_interval == 720000
+
+
+def test_retries_config_cascade():
+    # notice max_interval is set to 0 which is incorrect - so the DEFAULT_RETRIES_MAX_INTERVAL_SEC
+    # should be used
+    retry_config = retries.RetryConfig(
+        "backoff", retries.BackoffStrategy(3000, 0, 1.88, None), True
+    )
+    sdk = Mock()
+    sdk.sdk_configuration.retry_config = retry_config
+    retries_config = get_retries_config(
+        retries_connection_errors=False,
+        retries_exponent=1.75,
+        retries_initial_interval=20,
+        retries_max_elapsed_time=None,
+        retries_max_interval=None,
+        sdk=sdk,
+    )
+
+    assert not retries_config.retry_connection_errors
+    assert retries_config.backoff.exponent == 1.75
+    assert retries_config.backoff.initial_interval == 20
+    assert retries_config.backoff.max_elapsed_time == DEFAULT_RETRIES_MAX_ELAPSED_TIME_SEC
+    assert retries_config.backoff.max_interval == DEFAULT_RETRIES_MAX_INTERVAL_SEC
+
+
 def test_partition_multiple_via_api_with_single_filename(request: FixtureRequest):
     partition_mock_ = method_mock(
         request, requests, "post", return_value=FakeResponse(status_code=200)
@@ -522,4 +627,5 @@ def expected_call_():
                 xml_keep_tags=False,
             )
         ),
+        None,  # retries kwarg
     ]

Diff for: unstructured/__version__.py

@@ -1 +1 @@
-__version__ = "0.16.1-dev6"  # pragma: no cover
+__version__ = "0.16.1-dev7"  # pragma: no cover

Diff for: unstructured/partition/api.py

@@ -6,12 +6,20 @@
 import requests
 from unstructured_client import UnstructuredClient
 from unstructured_client.models import operations, shared
+from unstructured_client.utils import retries
 
 from unstructured.documents.elements import Element
 from unstructured.logger import logger
 from unstructured.partition.common.common import exactly_one
 from unstructured.staging.base import elements_from_dicts, elements_from_json
 
+# Default retry configuration taken from the client code
+DEFAULT_RETRIES_INITIAL_INTERVAL_SEC = 3000
+DEFAULT_RETRIES_MAX_INTERVAL_SEC = 720000
+DEFAULT_RETRIES_EXPONENT = 1.5
+DEFAULT_RETRIES_MAX_ELAPSED_TIME_SEC = 1800000
+DEFAULT_RETRIES_CONNECTION_ERRORS = True
+
 
 def partition_via_api(
     filename: Optional[str] = None,
@@ -21,6 +29,11 @@ def partition_via_api(
     api_url: str = "https://api.unstructured.io/general/v0/general",
     api_key: str = "",
     metadata_filename: Optional[str] = None,
+    retries_initial_interval: [int] = None,
+    retries_max_interval: Optional[int] = None,
+    retries_exponent: Optional[float] = None,
+    retries_max_elapsed_time: Optional[int] = None,
+    retries_connection_errors: Optional[bool] = None,
     **request_kwargs: Any,
 ) -> list[Element]:
     """Partitions a document using the Unstructured REST API. This is equivalent to
@@ -44,6 +57,21 @@ def partition_via_api(
         The URL for the Unstructured API. Defaults to the hosted Unstructured API.
     api_key
         The API key to pass to the Unstructured API.
+    retries_initial_interval
+        Defines the time interval (in seconds) to wait before the first retry in case of a request
+        failure. Defaults to 3000. If set should be > 0.
+    retries_max_interval
+        Defines the maximum time interval (in seconds) to wait between retries (the interval
+        between retries is increased as using exponential increase algorithm
+        - this setting limits it). Defaults to 720000. If set should be > 0.
+    retries_exponent
+        Defines the exponential factor to increase the interval between retries. Defaults to 1.5.
+        If set should be > 0.0.
+    retries_max_elapsed_time
+        Defines the maximum time (in seconds) to wait for retries. If exceeded, the original
+        exception is raised. Defaults to 1800000. If set should be > 0.
+    retries_connection_errors
+        Defines whether to retry on connection errors. Defaults to True.
     request_kwargs
         Additional parameters to pass to the data field of the request to the Unstructured API.
         For example the `strategy` parameter.
@@ -87,7 +115,19 @@ def partition_via_api(
         partition_parameters=shared.PartitionParameters(files=files, **request_kwargs)
     )
 
-    response = sdk.general.partition(request=req)
+    retries_config = get_retries_config(
+        retries_connection_errors=retries_connection_errors,
+        retries_exponent=retries_exponent,
+        retries_initial_interval=retries_initial_interval,
+        retries_max_elapsed_time=retries_max_elapsed_time,
+        retries_max_interval=retries_max_interval,
+        sdk=sdk,
+    )
+
+    response = sdk.general.partition(
+        request=req,
+        retries=retries_config,
+    )
 
     if response.status_code == 200:
         return elements_from_json(text=response.raw_response.text)
@@ -97,6 +137,97 @@ def partition_via_api(
         )
 
 
+def get_retries_config(
+    retries_connection_errors: Optional[bool],
+    retries_exponent: Optional[float],
+    retries_initial_interval: Optional[int],
+    retries_max_elapsed_time: Optional[int],
+    retries_max_interval: Optional[int],
+    sdk: UnstructuredClient,
+) -> Optional[retries.RetryConfig]:
+    """Constructs a RetryConfig object from the provided parameters. If any of the parameters
+    are None, the default values are taken from the SDK configuration or the default constants.
+
+    If all parameters are None, returns None (and the SDK-managed defaults are used within the
+    client)
+
+    The solution is not perfect as the RetryConfig object does not include the defaults by
+    itself so we might need to construct it basing on our defaults.
+
+    Parameters
+    ----------
+    retries_connection_errors
+        Defines whether to retry on connection errors. If not set the
+        DEFAULT_RETRIES_CONNECTION_ERRORS constant is used.
+    retries_exponent
+        Defines the exponential factor to increase the interval between retries.
+        If set, should be > 0.0 (otherwise the DEFAULT_RETRIES_EXPONENT constant is used)
+    retries_initial_interval
+        Defines the time interval to wait before the first retry in case of a request failure.
+        If set, should be > 0 (otherwise the DEFAULT_RETRIES_INITIAL_INTERVAL_SEC constant is used)
+    retries_max_elapsed_time
+        Defines the maximum time to wait for retries. If exceeded, the original exception is raised.
+        If set, should be > 0 (otherwise the DEFAULT_RETRIES_MAX_ELAPSED_TIME_SEC constant is used)
+    retries_max_interval
+        Defines the maximum time interval to wait between retries. If set, should be > 0
+        (otherwise the DEFAULT_RETRIES_MAX_INTERVAL_SEC constant is used)
+    sdk
+        The UnstructuredClient object to take the default values from.
+    """
+    retries_config = None
+    sdk_default_retries_config = sdk.sdk_configuration.retry_config
+    if any(
+        setting is not None
+        for setting in (
+            retries_initial_interval,
+            retries_max_interval,
+            retries_exponent,
+            retries_max_elapsed_time,
+            retries_connection_errors,
+        )
+    ):
+
+        def get_backoff_default(setting_name: str, default_value: Any) -> Any:
+            if sdk_default_retries_config:  # noqa: SIM102
+                if setting_value := getattr(sdk_default_retries_config.backoff, setting_name):
+                    return setting_value
+            return default_value
+
+        default_retries_connneciton_errors = (
+            sdk_default_retries_config.retry_connection_errors
+            if sdk_default_retries_config.retry_connection_errors is not None
+            else DEFAULT_RETRIES_CONNECTION_ERRORS
+        )
+
+        backoff_strategy = retries.BackoffStrategy(
+            initial_interval=(
+                retries_initial_interval
+                or get_backoff_default("initial_interval", DEFAULT_RETRIES_INITIAL_INTERVAL_SEC)
+            ),
+            max_interval=(
+                retries_max_interval
+                or get_backoff_default("max_interval", DEFAULT_RETRIES_MAX_INTERVAL_SEC)
+            ),
+            exponent=(
+                retries_exponent or get_backoff_default("exponent", DEFAULT_RETRIES_EXPONENT)
+            ),
+            max_elapsed_time=(
+                retries_max_elapsed_time
+                or get_backoff_default("max_elapsed_time", DEFAULT_RETRIES_MAX_ELAPSED_TIME_SEC)
+            ),
+        )
+        retries_config = retries.RetryConfig(
+            strategy="backoff",
+            backoff=backoff_strategy,
+            retry_connection_errors=(
+                retries_connection_errors
+                if retries_connection_errors is not None
+                else default_retries_connneciton_errors
+            ),
+        )
+    return retries_config
+
+
 def partition_multiple_via_api(
     filenames: Optional[list[str]] = None,
     content_types: Optional[list[str]] = None,