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Tasks

Service for managing long-running operations (tasks).

Provides utilities to poll and wait for async operations like merges.

Example

Start a merge operation

task_url = client.companies.merge(primary_id, duplicate_id)

Wait for completion with timeout

task = client.tasks.wait(task_url, timeout=60.0) if task.status == "success": print("Merge completed!")

Source code in affinity/services/tasks.py 
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class TaskService:
    """
    Service for managing long-running operations (tasks).

    Provides utilities to poll and wait for async operations like merges.

    Example:
        # Start a merge operation
        task_url = client.companies.merge(primary_id, duplicate_id)

        # Wait for completion with timeout
        task = client.tasks.wait(task_url, timeout=60.0)
        if task.status == "success":
            print("Merge completed!")
    """

    def __init__(self, client: HTTPClient):
        self._client = client

    def get(self, task_url: str) -> MergeTask:
        """
        Get the current status of a task.

        Args:
            task_url: The task URL returned from an async operation

        Returns:
            MergeTask with current status
        """
        # Extract task path from full URL if needed
        data = self._client.get_url(task_url)
        return MergeTask.model_validate(data)

    def wait(
        self,
        task_url: str,
        *,
        timeout: float = 300.0,
        poll_interval: float = 2.0,
        max_poll_interval: float = 30.0,
    ) -> MergeTask:
        """
        Wait for a task to complete with exponential backoff.

        Args:
            task_url: The task URL returned from an async operation
            timeout: Maximum time to wait in seconds (default: 5 minutes)
            poll_interval: Initial polling interval in seconds
            max_poll_interval: Maximum polling interval after backoff

        Returns:
            MergeTask with final status

        Raises:
            TimeoutError: If task doesn't complete within timeout
            AffinityError: If task fails
        """
        start_time = time.monotonic()
        current_interval = poll_interval

        while True:
            task = self.get(task_url)

            if task.status in (TaskStatus.SUCCESS, TaskStatus.FAILED):
                if task.status == TaskStatus.FAILED:
                    raise AffinityError(
                        f"Task failed: {task_url}",
                        status_code=None,
                        response_body={"task": task.model_dump()},
                    )
                return task

            # Check timeout
            elapsed = time.monotonic() - start_time
            if elapsed >= timeout:
                raise AffinityTimeoutError(f"Task did not complete within {timeout}s: {task_url}")

            # Wait with jitter before next poll
            jitter = random.uniform(0, current_interval * 0.1)
            time.sleep(current_interval + jitter)

            # Exponential backoff, capped at max
            current_interval = min(current_interval * 1.5, max_poll_interval)

get(task_url: str) -> MergeTask

Get the current status of a task.

Parameters:

Name Type Description Default
task_url str

The task URL returned from an async operation

 required

Returns:

Type Description
MergeTask

MergeTask with current status
Source code in affinity/services/tasks.py 
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def get(self, task_url: str) -> MergeTask:
    """
    Get the current status of a task.

    Args:
        task_url: The task URL returned from an async operation

    Returns:
        MergeTask with current status
    """
    # Extract task path from full URL if needed
    data = self._client.get_url(task_url)
    return MergeTask.model_validate(data)

wait(task_url: str, *, timeout: float = 300.0, poll_interval: float = 2.0, max_poll_interval: float = 30.0) -> MergeTask

Wait for a task to complete with exponential backoff.

Parameters:

Name Type Description Default
task_url str

The task URL returned from an async operation

 required
timeout float

Maximum time to wait in seconds (default: 5 minutes)

 300.0
poll_interval float

Initial polling interval in seconds

 2.0
max_poll_interval float

Maximum polling interval after backoff

 30.0

Returns:

Type Description
MergeTask

MergeTask with final status

Raises:

Type Description
TimeoutError

If task doesn't complete within timeout
AffinityError

If task fails
Source code in affinity/services/tasks.py 
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def wait(
    self,
    task_url: str,
    *,
    timeout: float = 300.0,
    poll_interval: float = 2.0,
    max_poll_interval: float = 30.0,
) -> MergeTask:
    """
    Wait for a task to complete with exponential backoff.

    Args:
        task_url: The task URL returned from an async operation
        timeout: Maximum time to wait in seconds (default: 5 minutes)
        poll_interval: Initial polling interval in seconds
        max_poll_interval: Maximum polling interval after backoff

    Returns:
        MergeTask with final status

    Raises:
        TimeoutError: If task doesn't complete within timeout
        AffinityError: If task fails
    """
    start_time = time.monotonic()
    current_interval = poll_interval

    while True:
        task = self.get(task_url)

        if task.status in (TaskStatus.SUCCESS, TaskStatus.FAILED):
            if task.status == TaskStatus.FAILED:
                raise AffinityError(
                    f"Task failed: {task_url}",
                    status_code=None,
                    response_body={"task": task.model_dump()},
                )
            return task

        # Check timeout
        elapsed = time.monotonic() - start_time
        if elapsed >= timeout:
            raise AffinityTimeoutError(f"Task did not complete within {timeout}s: {task_url}")

        # Wait with jitter before next poll
        jitter = random.uniform(0, current_interval * 0.1)
        time.sleep(current_interval + jitter)

        # Exponential backoff, capped at max
        current_interval = min(current_interval * 1.5, max_poll_interval)

Async version of TaskService.

Example

Start a merge operation

task_url = await client.companies.merge(primary_id, duplicate_id)

Wait for completion with timeout

task = await client.tasks.wait(task_url, timeout=60.0)

Source code in affinity/services/tasks.py 
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class AsyncTaskService:
    """
    Async version of TaskService.

    Example:
        # Start a merge operation
        task_url = await client.companies.merge(primary_id, duplicate_id)

        # Wait for completion with timeout
        task = await client.tasks.wait(task_url, timeout=60.0)
    """

    def __init__(self, client: AsyncHTTPClient):
        self._client = client

    async def get(self, task_url: str) -> MergeTask:
        """
        Get the current status of a task.

        Args:
            task_url: The task URL returned from an async operation

        Returns:
            MergeTask with current status
        """
        data = await self._client.get_url(task_url)
        return MergeTask.model_validate(data)

    async def wait(
        self,
        task_url: str,
        *,
        timeout: float = 300.0,
        poll_interval: float = 2.0,
        max_poll_interval: float = 30.0,
    ) -> MergeTask:
        """
        Wait for a task to complete with exponential backoff.

        Args:
            task_url: The task URL returned from an async operation
            timeout: Maximum time to wait in seconds (default: 5 minutes)
            poll_interval: Initial polling interval in seconds
            max_poll_interval: Maximum polling interval after backoff

        Returns:
            MergeTask with final status

        Raises:
            TimeoutError: If task doesn't complete within timeout
            AffinityError: If task fails
        """
        start_time = time.monotonic()
        current_interval = poll_interval

        while True:
            task = await self.get(task_url)

            if task.status in (TaskStatus.SUCCESS, TaskStatus.FAILED):
                if task.status == TaskStatus.FAILED:
                    raise AffinityError(
                        f"Task failed: {task_url}",
                        status_code=None,
                        response_body={"task": task.model_dump()},
                    )
                return task

            # Check timeout
            elapsed = time.monotonic() - start_time
            if elapsed >= timeout:
                raise AffinityTimeoutError(f"Task did not complete within {timeout}s: {task_url}")

            # Wait with jitter before next poll
            jitter = random.uniform(0, current_interval * 0.1)
            await asyncio.sleep(current_interval + jitter)

            # Exponential backoff, capped at max
            current_interval = min(current_interval * 1.5, max_poll_interval)

get(task_url: str) -> MergeTask async

Get the current status of a task.

Parameters:

Name Type Description Default
task_url str

The task URL returned from an async operation

 required

Returns:

Type Description
MergeTask

MergeTask with current status
Source code in affinity/services/tasks.py 
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async def get(self, task_url: str) -> MergeTask:
    """
    Get the current status of a task.

    Args:
        task_url: The task URL returned from an async operation

    Returns:
        MergeTask with current status
    """
    data = await self._client.get_url(task_url)
    return MergeTask.model_validate(data)

wait(task_url: str, *, timeout: float = 300.0, poll_interval: float = 2.0, max_poll_interval: float = 30.0) -> MergeTask async

Wait for a task to complete with exponential backoff.

Parameters:

Name Type Description Default
task_url str

The task URL returned from an async operation

 required
timeout float

Maximum time to wait in seconds (default: 5 minutes)

 300.0
poll_interval float

Initial polling interval in seconds

 2.0
max_poll_interval float

Maximum polling interval after backoff

 30.0

Returns:

Type Description
MergeTask

MergeTask with final status

Raises:

Type Description
TimeoutError

If task doesn't complete within timeout
AffinityError

If task fails
Source code in affinity/services/tasks.py 
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async def wait(
    self,
    task_url: str,
    *,
    timeout: float = 300.0,
    poll_interval: float = 2.0,
    max_poll_interval: float = 30.0,
) -> MergeTask:
    """
    Wait for a task to complete with exponential backoff.

    Args:
        task_url: The task URL returned from an async operation
        timeout: Maximum time to wait in seconds (default: 5 minutes)
        poll_interval: Initial polling interval in seconds
        max_poll_interval: Maximum polling interval after backoff

    Returns:
        MergeTask with final status

    Raises:
        TimeoutError: If task doesn't complete within timeout
        AffinityError: If task fails
    """
    start_time = time.monotonic()
    current_interval = poll_interval

    while True:
        task = await self.get(task_url)

        if task.status in (TaskStatus.SUCCESS, TaskStatus.FAILED):
            if task.status == TaskStatus.FAILED:
                raise AffinityError(
                    f"Task failed: {task_url}",
                    status_code=None,
                    response_body={"task": task.model_dump()},
                )
            return task

        # Check timeout
        elapsed = time.monotonic() - start_time
        if elapsed >= timeout:
            raise AffinityTimeoutError(f"Task did not complete within {timeout}s: {task_url}")

        # Wait with jitter before next poll
        jitter = random.uniform(0, current_interval * 0.1)
        await asyncio.sleep(current_interval + jitter)

        # Exponential backoff, capped at max
        current_interval = min(current_interval * 1.5, max_poll_interval)