bgpy.core package¶

Submodules¶

bgpy.core.environment module¶

bgpy.core.log module¶

class bgpy.core.log.Log(name, level: str = 'INFO', tag: Optional[str] = None, file: Optional[pathlib.Path] = None, clear: bool = False)¶

Bases: object

Logger class, optionally binds to a log file and writes logs with timestamp and PID.

clear_log_file() → None¶: Clears the log file.

critical(msg: str) → None¶

Log a message with level “CRITICAL”

Parameters: msg (str) – Message to log.

debug(msg: str) → None¶

Log a message with level “DEBUG”

Parameters: msg (str) – Message to log.

error(msg: str) → None¶

Log a message with level “ERROR”

Parameters: msg (str) – Message to log.

exception(msg: str) → None¶

Log an exception with message.

Parameters: msg (str) – Message to log.

file¶

info(msg: str) → None¶

Log a message with level “INFO”

Parameters: msg (str) – Message to log.

level¶

logger¶

name¶

tag¶

warning(msg: str) → None¶

Log a message with level “WARNING”

Parameters: msg (str) – Message to log.

bgpy.core.message module¶

class bgpy.core.message.Message(type_: bgpy.core.message.MessageType, args: dict = {})¶

Bases: object

Messages for the socket communciation.

Messages to be sent and reveiced via the client sockets. The message consists of a message type and arguments. The message type is fixed in the communication between the client sockets, and the arguments are used for confirmation, error messages and communicating response values.

args¶

get_args() → dict¶

Get the argument dict of the message.

Returns: Arguments of the message.
Return type: dict

set_args(args: dict) → None¶

Set the argument dict of the message.

Parameters: args (dict) – Arguments to set on the message.
Returns
Return type: None

type¶

class bgpy.core.message.MessageType(value)¶

Bases: enum.Enum

Message types for the messages in the communication.

The message types defined in this enum include:

INIT: Only sent once to initialize the background process.

EXIT: Command message to tell process to exit.

EXEC: Command message with function call and arguments to execute.

OK: Response message, optionally with return values.

ERROR: Error response message.

ERROR = 4¶

EXEC = 1¶

EXIT = 2¶

INIT = 0¶

OK = 3¶

bgpy.core.serialize module¶

bgpy.core.serialize.deserialize(x: bytes) → bgpy.core.message.Message¶

Deserializes bytes to a Python Message object.

Parameters: x (bytes) – Bytes containing a serialized Python Message object.
Returns: A python object.
Return type: object

bgpy.core.serialize.serialize(x: bgpy.core.message.Message) → bytes¶

Serializes a Python Message object.

Parameters: x (object) – A Python Message object.
Returns: Bytes containing the serialized Python Message object.
Return type: bytes

bgpy.core.sockets module¶

class bgpy.core.sockets.ClientSocket(sock: Optional[socket.socket] = None, log_level: str = 'WARNING', log_file: Optional[pathlib.Path] = None)¶

Bases: contextlib.ContextDecorator

Client socket

Stream socket used on the client and the server to communciate.

connect(host: str, port: int) → None¶

Connect to port on host.

Parameters

host (str, optional) – Address or name of the host
port (int, optional) – Port on the host to connect to

Raises

error – If the socket connection fails, the error is also written to the logs and raised.

log¶

recv() → Optional[bgpy.core.message.Message]¶

Receive message from client socket.

Receive a message from the connected client socket, by reading the network buffer.

Returns: A message of type OK or Error.
Return type: Optional[Message]

send(msg: bgpy.core.message.Message, await_response: bool = False) → Optional[bgpy.core.message.Message]¶

Send a message to client socket.

Send a message to a connected client socket via the network buffer. By default, after the message is sent and a confirmation message is received the method returns. If ‘await_response’ is set to True, after receiving the confirmation, the socket waits for another response by the remote client socket, which is again confirmed if received.

Note

If ‘await_response’ is set to True, but the remote client socket is not sending a response, this socket is waiting forever.

Parameters

msg (Message) – Message to send to the remote client socket.
await_response (bool, optional) – Waits for another response (after confirmation of the request) by the remote client socket, by default False

Returns

The confirmation message of the remote client socket. Or, if ‘await_response’ is set to True, a custom response from the remote client socket.

Return type

Message

sock¶

class bgpy.core.sockets.ServerSocket(host: str, port: int, backlog: int = 3, log_level: str = 'WARNING', log_file: Optional[pathlib.Path] = None)¶

Bases: contextlib.ContextDecorator

Server socket

Socket used on the server to listen on a port for requests. If the server accepts a connection request a new client socket for the communication is created, which binds to the client socket on the client.

accept() → socket.socket¶

Accepts connection requests from client sockets and creates a client socket for the communication.

Returns: Returns a client socket on the server to communicate with the remote client socket.
Return type: socket

log¶

sock¶

Module contents¶

Sub-level module ‘core’ for bgpy package.

bgpy package

bgpy.example package