55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
// Copyright 2016 The Chihaya Authors. All rights reserved.
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// Use of this source code is governed by the BSD 2-Clause license,
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// which can be found in the LICENSE file.
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// Package server implements an abstraction over servers meant to be run .
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// alongside a tracker.
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//
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// Servers may be implementations of different transport protocols or have their
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// own custom behavior.
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package server
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import (
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"fmt"
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"github.com/chihaya/chihaya/config"
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"github.com/chihaya/chihaya/tracker"
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)
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var constructors = make(map[string]Constructor)
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// Constructor is a function that creates a new Server.
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type Constructor func(*config.ServerConfig, *tracker.Tracker) (Server, error)
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// Register makes a Constructor available by the provided name.
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//
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// If this function is called twice with the same name or if the Constructor is
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// nil, it panics.
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func Register(name string, con Constructor) {
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if con == nil {
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panic("server: could not register nil Constructor")
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}
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if _, dup := constructors[name]; dup {
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panic("server: could not register duplicate Constructor: " + name)
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}
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constructors[name] = con
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}
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// New creates a Server specified by a configuration.
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func New(cfg *config.ServerConfig, tkr *tracker.Tracker) (Server, error) {
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con, ok := constructors[cfg.Name]
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if !ok {
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return nil, fmt.Errorf(
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"server: unknown Constructor %q (forgotten import?)",
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cfg.Name,
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)
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}
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return con(cfg, tkr)
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}
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// Server represents one instance of a server accessing the tracker.
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type Server interface {
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Start()
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Stop()
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}
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