Message¶

Usage

use Message;

or

import Message;

enum MsgType { NORMAL, WARNING, ERROR }¶

enum constant NORMAL¶

enum constant WARNING¶

enum constant ERROR¶

enum MsgFormat { STRING, BINARY }¶

enum constant STRING¶

enum constant BINARY¶

record MsgTuple¶

Encapsulates the message string and message type.

var msg : string¶

var msgType : MsgType¶

var msgFormat : MsgFormat¶

var user : string¶

var payload : bytes¶

record RequestMsg¶

Encapsulates state corresponding to a client request sent to the Arkouda server.

var user : string¶

var token : string¶

var cmd : string¶

var format : string¶

var args : string¶

var size : int¶

proc MsgTuple.init()¶

proc MsgTuple.init(msg: string, msgType: MsgType)

proc MsgTuple.init(msg: string, msgType: MsgType, msgFormat: MsgFormat, user = "", in payload = b"")

proc type MsgTuple.success(msg: string = "") : MsgTuple¶

proc type MsgTuple.newSymbol(name: string, sym: borrowed AbstractSymEntry) : MsgTuple throws¶: Create a MsgTuple indicating to the client that a new symbol was created

proc type MsgTuple.fromResponses(responses: [] MsgTuple) : MsgTuple throws¶

Create a MsgTuple from a group of responses (useful for returning multiple symbols from one command, see: ‘unstack’ in ‘ManipulationMsg’)

If any of the responses are errors, return the first error message. Otherwise, return a success message, where each of the ‘msg’ fields are composed into a JSON list.

proc type MsgTuple.fromScalar(scalar: ?t) : MsgTuple throws¶

proc type MsgTuple.error(msg: string) : MsgTuple¶

proc type MsgTuple.payload(in data: bytes) : MsgTuple

proc ref MsgTuple.serialize(user: string) throws¶

record ParameterObj¶

Encapsulate parameter for a request sent to the Arkouda server
Note - Only used when args is in JSON format.
Note - during the transition from space delimited string to JSON formated string, this object is not part of RequestMsg,
but will be once all messages are transitioned to JSON arguments.

var key : string¶

var val : string¶

var dtype : string¶

proc init()¶

proc init(key: string, val: string, dtype: string)

proc ref setKey(value: string)¶

proc ref setVal(value: string)¶

proc getDType()¶

Return the Dtype value as NumpyDtype
Returns Dtype

proc getValue()¶

Return the raw string value
Returns string

proc tryGetScalar(type t) : (t, bool)¶

proc toScalar(type t) : t throws¶

Get a value of the given type from a JSON scalar

Arguments:: t – type: the scalar type to parse

Throws an ErrorWithContext if the value cannot be parsed as the given: type

proc toScalarTuple(type t, param size: int) : size*t throws¶

Get a tuple of the given type from a JSON array of scalar values

Arguments:

size – int: the number of elements in the tuple (must match the number of elements in the JSON array)
t – type: the scalar type to parse

Throws an ErrorWithContext if the value is not a JSON array, the: tuple is the wrong size, or if the elements of the array cannot be parsed as the given type

proc toScalarList(type t) : list(t) throws¶

Get a list of the given type from a JSON array of scalar values

Arguments:: t – type: the scalar type to parse

Throws an ErrorWithContext if the value is not a JSON array or if the: elements of the array cannot be parsed as the given type

proc toScalarArray(type t, size: int) : [] t throws¶

Get an array of the given type from a JSON array of scalar values

Arguments:

t – type: the scalar type to parse
size – int: the number of elements in the array (must match the number of elements in the JSON array)

Throws an ErrorWithContext if the value is not a JSON array, the: array is the wrong size, or if the elements of the array cannot be parsed as the given type

proc getScalarValue(type t) : t throws¶

proc getIntValue() : int throws¶

proc getPositiveIntValue(max: int) : int throws¶: Return the value as a positive int If the value is negative, return ‘value + max + 1’, otherwise return the value This is useful for implementing Python’s negative indexing rules

proc getUIntValue() : uint throws¶

proc getUInt8Value() : uint(8) throws¶

proc getRealValue() : real throws¶

proc getBoolValue() : bool throws¶

proc getBigIntValue() : bigint throws¶

proc getList(size: int) throws¶

proc getTuple(param size: int) : size*int throws¶

class MessageArgs : writeSerializable¶

Container class for the message arguments formatted as json :param_list: array of ParameterObj :size: int - number of parameters contained in list

var param_list : list(ParameterObj)¶

var size : int¶

var payload : bytes¶

proc init()¶

proc init(param_list: list(ParameterObj))

proc init(param_list: list(ParameterObj, parSafe = true), in payload: bytes)

proc addPayload(in p: bytes)¶: Attach a binary payload to the message arguments

proc this(key: string) : ParameterObj throws¶: Get the value of the argument with the given key

iter these() : ParameterObj¶

override proc serialize(writer: fileWriter(?), ref serializer: ?st) throws¶

proc get(key: string) : ParameterObj throws¶

Identify the parameter with the provided key and return it
Returns ParameterObj with the provided key
Throws KeyNotFound error if the provide key does not exist.

proc getValueOf(key: string) : string throws¶

proc contains(key: string) : bool¶: Return true if there is an argument with the given name, false otherwise

proc parseParameter(payload: string) throws¶: Parse and individual parameter components into a ParameterObj

proc parseMessageArgs(json_str: string, size: int, in payload = b"") throws¶: Parse arguments formatted as json string into objects

proc deserialize(ref msg: RequestMsg, request: string) throws¶

Deserializes a JSON-formatted string to a RequestMsg object, where the
JSON format is as follows (size is only set for json args. Otherwise, -1):
{“user”: “user”, “token”: “token”, “cmd”: “cmd”, “format”: “STRING”, “args”: “arg1 arg2”, “size”: “-1”}

proc serialize(msg: string, msgType: MsgType, msgFormat: MsgFormat, user: string) : string throws¶

Generates a ReplyMsg object and serializes it into a JSON-formatted reply message