Context

Service context is defined as a combination of the module name + service name.

In the following example, ExampleService would be assigned a context name of demo_app:example.

CreateApplication({
  name: "demo_app",
  services: {
    example: ExampleService,
  }
});

Context is passed in via TServiceParams, and is automatically attached to log messages.

import { TServiceParams } from "@digital-alchemy/core";

export function ExampleService({ context, logger }: TServiceParams) {
  logger.info(`hello world`);
}

which prints out a message like this

[Wed 07:09:15.383] [INFO][demo_app:example]: hello world

Usage

context is primarily intended to aid debugging, and downstream libraries such as synapse may request it in order to aid debug logging.

import { TServiceParams } from "@digital-alchemy/core";

export function ExampleService({ context, synapse }: TServiceParams) {
  synapse.number({
    context,
    name: "example number entity"
  });
}

Providing context allows the library to emit logs attributed to your service.

Usage​

Usage