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proxystore.endpoint.client

proxystore/endpoint/client.py

Utilities for client interactions with endpoints.

evict() 

evict(
    address: str,
    key: str,
    endpoint: UUID | str | None = None,
    session: Session | None = None,
) -> None

Evict the object associated with the key.

Parameters:

  • address (str) –

    Address of endpoint.

  • key (str) –

    Key associated with object to evict.

  • endpoint (UUID | str | None, default: None ) –

    Optional UUID of remote endpoint to forward operation to.

  • session (Session | None, default: None ) –

    Session instance to use for making the request. Reusing the same session across multiple requests to the same host can improve performance.

Raises:

  • RequestException –

    If the endpoint request results in an unexpected error code.

Source code in proxystore/endpoint/client.py 
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def evict(
    address: str,
    key: str,
    endpoint: uuid.UUID | str | None = None,
    session: requests.Session | None = None,
) -> None:
    """Evict the object associated with the key.

    Args:
        address: Address of endpoint.
        key: Key associated with object to evict.
        endpoint: Optional UUID of remote endpoint to forward operation to.
        session: Session instance to use for making the request. Reusing the
            same session across multiple requests to the same host can improve
            performance.

    Raises:
        RequestException: If the endpoint request results in an unexpected
            error code.
    """
    endpoint_str = (
        str(endpoint) if isinstance(endpoint, uuid.UUID) else endpoint
    )
    post = requests.post if session is None else session.post
    response = post(
        f'{address}/evict',
        params={'key': key, 'endpoint': endpoint_str},
    )
    if not response.ok:
        raise requests.exceptions.RequestException(
            f'Endpoint returned HTTP error code {response.status_code}. '
            f'{response.text}',
            response=response,
        )

exists() 

exists(
    address: str,
    key: str,
    endpoint: UUID | str | None = None,
    session: Session | None = None,
) -> bool

Check if an object associated with the key exists.

Parameters:

  • address (str) –

    Address of endpoint.

  • key (str) –

    Key potentially associated with stored object.

  • endpoint (UUID | str | None, default: None ) –

    Optional UUID of remote endpoint to forward operation to.

  • session (Session | None, default: None ) –

    Session instance to use for making the request. Reusing the same session across multiple requests to the same host can improve performance.

Returns:

  • bool –

    If an object associated with the key exists.

Raises:

  • RequestException –

    If the endpoint request results in an unexpected error code.

Source code in proxystore/endpoint/client.py 
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def exists(
    address: str,
    key: str,
    endpoint: uuid.UUID | str | None = None,
    session: requests.Session | None = None,
) -> bool:
    """Check if an object associated with the key exists.

    Args:
        address: Address of endpoint.
        key: Key potentially associated with stored object.
        endpoint: Optional UUID of remote endpoint to forward operation to.
        session: Session instance to use for making the request. Reusing the
            same session across multiple requests to the same host can improve
            performance.

    Returns:
        If an object associated with the key exists.

    Raises:
        RequestException: If the endpoint request results in an unexpected
            error code.
    """
    endpoint_str = (
        str(endpoint) if isinstance(endpoint, uuid.UUID) else endpoint
    )
    get_ = requests.get if session is None else session.get
    response = get_(
        f'{address}/exists',
        params={'key': key, 'endpoint': endpoint_str},
    )
    if not response.ok:
        raise requests.exceptions.RequestException(
            f'Endpoint returned HTTP error code {response.status_code}. '
            f'{response.text}',
            response=response,
        )
    return response.json()['exists']

get() 

get(
    address: str,
    key: str,
    endpoint: UUID | str | None = None,
    session: Session | None = None,
) -> bytes | None

Get the serialized object associated with the key.

Parameters:

  • address (str) –

    Address of endpoint.

  • key (str) –

    Key associated with object to retrieve.

  • endpoint (UUID | str | None, default: None ) –

    Optional UUID of remote endpoint to forward operation to.

  • session (Session | None, default: None ) –

    Session instance to use for making the request. Reusing the same session across multiple requests to the same host can improve performance.

Returns:

  • bytes | None –

    Serialized object or None if the object does not exist.

Raises:

  • RequestException –

    If the endpoint request results in an unexpected error code.

Source code in proxystore/endpoint/client.py 
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def get(
    address: str,
    key: str,
    endpoint: uuid.UUID | str | None = None,
    session: requests.Session | None = None,
) -> bytes | None:
    """Get the serialized object associated with the key.

    Args:
        address: Address of endpoint.
        key: Key associated with object to retrieve.
        endpoint: Optional UUID of remote endpoint to forward operation to.
        session: Session instance to use for making the request. Reusing the
            same session across multiple requests to the same host can improve
            performance.

    Returns:
        Serialized object or `None` if the object does not exist.

    Raises:
        RequestException: If the endpoint request results in an unexpected
            error code.
    """
    endpoint_str = (
        str(endpoint) if isinstance(endpoint, uuid.UUID) else endpoint
    )
    get_ = requests.get if session is None else session.get
    response = get_(
        f'{address}/get',
        params={'key': key, 'endpoint': endpoint_str},
        stream=True,
    )

    # Status code 404 is only returned if there's no data associated with the
    # provided key.
    if response.status_code == 404:
        return None

    if not response.ok:
        raise requests.exceptions.RequestException(
            f'Endpoint returned HTTP error code {response.status_code}. '
            f'{response.text}',
            response=response,
        )

    data = bytearray()
    for chunk in response.iter_content(chunk_size=None):
        data += chunk
    return bytes(data)

put() 

put(
    address: str,
    key: str,
    data: bytes,
    endpoint: UUID | str | None = None,
    session: Session | None = None,
) -> None

Put a serialized object in the store.

Parameters:

  • address (str) –

    Address of endpoint.

  • key (str) –

    Key associated with object to retrieve.

  • data (bytes) –

    Serialized data to put in the store.

  • endpoint (UUID | str | None, default: None ) –

    Optional UUID of remote endpoint to forward operation to.

  • session (Session | None, default: None ) –

    Session instance to use for making the request. Reusing the same session across multiple requests to the same host can improve performance.

Raises:

  • RequestException –

    If the endpoint request results in an unexpected error code.

Source code in proxystore/endpoint/client.py 
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def put(
    address: str,
    key: str,
    data: bytes,
    endpoint: uuid.UUID | str | None = None,
    session: requests.Session | None = None,
) -> None:
    """Put a serialized object in the store.

    Args:
        address: Address of endpoint.
        key: Key associated with object to retrieve.
        data: Serialized data to put in the store.
        endpoint: Optional UUID of remote endpoint to forward operation to.
        session: Session instance to use for making the request. Reusing the
            same session across multiple requests to the same host can improve
            performance.

    Raises:
        RequestException: If the endpoint request results in an unexpected
            error code.
    """
    endpoint_str = (
        str(endpoint) if isinstance(endpoint, uuid.UUID) else endpoint
    )
    post = requests.post if session is None else session.post
    response = post(
        f'{address}/set',
        headers={'Content-Type': 'application/octet-stream'},
        params={'key': key, 'endpoint': endpoint_str},
        data=chunk_bytes(data, MAX_CHUNK_LENGTH),
        stream=True,
    )
    if not response.ok:
        raise requests.exceptions.RequestException(
            f'Endpoint returned HTTP error code {response.status_code}. '
            f'{response.text}',
            response=response,
        )