const logsAPI = require('@opentelemetry/api-logs');
const {
  LoggerProvider,
  SimpleLogRecordProcessor,
  ConsoleLogRecordExporter,
} = require('@opentelemetry/sdk-logs');

// To start a logger, you first need to initialize the Logger provider.
const loggerProvider = new LoggerProvider();
// Add a processor to export log record
loggerProvider.addLogRecordProcessor(
  new SimpleLogRecordProcessor(new ConsoleLogRecordExporter())
);

//  To create a log record, you first need to get a Logger instance
const logger = loggerProvider.getLogger('default');

// You can also use global singleton
logsAPI.logs.setGlobalLoggerProvider(loggerProvider);
const logger = logsAPI.logs.getLogger('default');

// emit a log record
logger.emit({
  severityNumber: logsAPI.SeverityNumber.INFO,
  severityText: 'INFO',
  body: 'this is a log record body',
  attributes: { 'log.type': 'LogRecord' },
});