module arch.node.engines.ticker_messages;

import prelude open;

TickerMsg Message Interface¶

TickerMsg Message Constructors¶

TickerMsgIncrement¶

A TickerMsgIncrement message instructs the engine to increase the counter. This message doesn't require any arguments.

TickerMsgCountRequest¶

A TickerMsgCountRequest message requests the engine to send the current counter value back to the requester. This message doesn't require any arguments.

TickerMsgCountReply CountReply¶

The TickerMsgCountReply contains the counter value.

type CountReply : Type :=
  mkCountReply@{
    counter : Nat;
  };

TickerMsg¶

type TickerMsg :=
  | TickerMsgIncrement
  | TickerMsgCountRequest
  | TickerMsgCountReply CountReply;

There are only two message tags: TickerMsgIncrement, which increases the counter state of the ticker, and TickerMsgCount, which the ticker responds to with the current counter state.

Ticker Interaction Diagram¶

This diagram represents a simple interaction between a Ticker engine instance and another entity sending increment requests and count requests.

sequenceDiagram
    participant Ticker
    participant EngineTickerClient

    EngineTickerClient ->> Ticker: Send TickerMsgIncrement
    Note over Ticker: Counter = 1

    EngineTickerClient ->> Ticker: Send TickerMsgIncrement
    Note over Ticker: Counter = 2

    EngineTickerClient ->> Ticker: Send TickerMsgCount
    Ticker ->> EngineTickerClient: Respond with Counter (2)