Logging

Logging plugins are not intended to modify the request or response in any way, but instead should be able to dispatch a log event synchronously or asynchronously. Loggers can log anything, from metrics about query volumes to individual queries themselves. Loggers can subscribe to events from the DNSResponse object and can log data reactively. If you're using the ConsoleLogger, this step is already taken care of for you if you configure the logger to log responses:

loggedServer.ts

const server = new DefaultServer({
    networks: [...]
});

s.use(logger.handler);

When the server receives a new request that is passed to the logger, if logRequests is enabled, it will immediately dispatch a log. If logResponses is enabled, the logger will subscribe to the DNSResponse's done event, dispatching a separate log once the answer is recorded.

warning

Custom or third party loggers may be more complicated in nature than the simple ConsoleLogger. If that's the case, it's important to make sure that all logging actions are performed asynchronously. Synchronous logs may degrade server performance.

For a more detailed look at Cache and DefaultCache APIs, checkout the respective documentation:

• Logger
• ConsoleLogger