93 lines
2.6 KiB
Go
93 lines
2.6 KiB
Go
// Copyright (C) 2018 Storj Labs, Inc.
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// See LICENSE for copying information.
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package kademlia
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import (
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"context"
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"flag"
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"github.com/zeebo/errs"
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monkit "gopkg.in/spacemonkeygo/monkit.v2"
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"storj.io/storj/pkg/node"
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"storj.io/storj/pkg/pb"
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"storj.io/storj/pkg/provider"
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"storj.io/storj/pkg/utils"
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)
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var (
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// Error defines a Kademlia error
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Error = errs.Class("kademlia error")
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mon = monkit.Package()
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)
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const (
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defaultAlpha = 5
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)
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var (
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// TODO: replace these with constants after tuning
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flagBucketSize = flag.Int("kademlia-bucket-size", 20, "Size of each Kademlia bucket")
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flagReplacementCacheSize = flag.Int("kademlia-replacement-cache-size", 5, "Size of Kademlia replacement cache")
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)
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//CtxKey Used as kademlia key
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type CtxKey int
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const (
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ctxKeyKad CtxKey = iota
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)
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// Config defines all of the things that are needed to start up Kademlia
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// server endpoints (and not necessarily client code).
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type Config struct {
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BootstrapAddr string `help:"the kademlia node to bootstrap against" default:"bootstrap-dev.storj.io:8080"`
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DBPath string `help:"the path for our db services to be created on" default:"$CONFDIR/kademlia"`
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// TODO(jt): remove this! kademlia should just use the grpc server
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TODOListenAddr string `help:"the host/port for kademlia to listen on. TODO(jt): this should be removed!" default:"127.0.0.1:7776"`
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Alpha int `help:"alpha is a system wide concurrency parameter." default:"5"`
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}
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// Run implements provider.Responsibility
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func (c Config) Run(ctx context.Context, server *provider.Provider) (
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err error) {
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defer mon.Task()(&ctx)(&err)
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// TODO(coyle): I'm thinking we just remove this function and grab from the config.
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in, err := GetIntroNode(c.BootstrapAddr)
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if err != nil {
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return err
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}
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// TODO(jt): kademlia should register on server.GRPC() instead of listening
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// itself
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in.Id = "foo"
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kad, err := NewKademlia(server.Identity().ID, []pb.Node{*in}, c.TODOListenAddr, server.Identity(), c.DBPath, c.Alpha)
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if err != nil {
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return err
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}
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defer func() { err = utils.CombineErrors(err, kad.Disconnect()) }()
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mn := node.NewServer(kad)
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pb.RegisterNodesServer(server.GRPC(), mn)
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// TODO(jt): Bootstrap should probably be blocking and we should kick it off
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// in a goroutine here
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if err = kad.Bootstrap(ctx); err != nil {
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return err
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}
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return server.Run(context.WithValue(ctx, ctxKeyKad, kad))
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}
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// LoadFromContext loads an existing Kademlia from the Provider context
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// stack if one exists.
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func LoadFromContext(ctx context.Context) *Kademlia {
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if v, ok := ctx.Value(ctxKeyKad).(*Kademlia); ok {
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return v
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}
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return nil
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}
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