NewScheduler creates a new Scheduler.

NewServer wraps a requestServer and returns a server.

data: nil; sent by serverWithLimits.

data: RequestResponse; sent by requestServer.

data: nil; sent by Scheduler.

data: RequestResponse; sent by requestServer.

data: RequestResponse; sent by serverWithTimeout.

data: nil; sent by Scheduler.

Event describes an event where the type of Data depends on Type.

EventType identifies an event type, either related to a request or the server in general.

RequestResponse is the Data type of request events.

Scheduler is a modular network data retrieval framework that coordinates multiple servers and retrieval mechanisms (modules).

Module represents a mechanism which is typically responsible for downloading and updating a passive data structure.

Requester allows Modules to obtain the list of momentarily available servers, start new requests and report server failure when a response has been proven to be invalid in the processing phase.