traci

hapi open tracing plugin

Options

• tracer - instance of OpenTracing.Tracer, defaults to OpenTracing.Tracer base class
• onRequest - array of properties to select from the hapi request object and include in the hapi_request span log. Defaults to ['headers', 'info']
• onPostAuth - array of properties to select from the hapi request object and include in the hapi_auth span log. Defaults to ['auth']
• onPreHandler - array of properties to select from the hapi request object and include in the hapi_handler span log. Defaults to ['route.settings.handler.name']
• onPreResponse - array of properties to select from the hapi request object and include in the hapi_response span log. Defaults to ['info']

Properties

Decorates the hapi server object with .tracer, which is an instance of the intialized Tracer class. This can be used to create spans and reports. To access a parent span of one of the following types you can use the new request.span(type) method to return the current span of whatever type you care about. For example, to create a new span in a request handler using the parent handler span you can invoke request.span as follows:

handler: (request, h) => {
  const span = request.server.tracer.startSpan('some_action', { childOf: request.span('handler').context() });
  const something = await someAction();
  span.finish();
  return something;
}

The following spans are created:

• hapi_request
• hapi_auth
• hapi_handler
• hapi_response
• hapi_log

Inside of a handler you can obtain the parent span by invoking request.span()