64 lines
1.3 KiB
Go
64 lines
1.3 KiB
Go
// Copyright (C) 2018 Storj Labs, Inc.
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// See LICENSE for copying information
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package node
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import (
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"context"
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"log"
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"google.golang.org/grpc"
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"storj.io/storj/pkg/dht"
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"storj.io/storj/pkg/pb"
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"storj.io/storj/pkg/transport"
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)
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// Node is the storj definition for a node in the network
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type Node struct {
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dht dht.DHT
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self pb.Node
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tc transport.Client
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cache *ConnectionPool
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}
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// Lookup queries nodes looking for a particular node in the network
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func (n *Node) Lookup(ctx context.Context, to pb.Node, find pb.Node) ([]*pb.Node, error) {
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v, err := n.cache.Get(to.GetId())
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if err != nil {
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return nil, err
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}
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var conn *grpc.ClientConn
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if c, ok := v.(*grpc.ClientConn); ok {
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conn = c
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} else {
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c, err := n.tc.DialNode(ctx, &to)
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if err != nil {
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return nil, err
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}
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if err := n.cache.Add(to.GetId(), c); err != nil {
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log.Printf("Error %s occurred adding %s to cache", err, to.GetId())
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}
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conn = c
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}
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c := pb.NewNodesClient(conn)
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resp, err := c.Query(ctx, &pb.QueryRequest{Limit: 20, Sender: &n.self, Target: &find, Pingback: true})
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if err != nil {
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return nil, err
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}
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rt, err := n.dht.GetRoutingTable(ctx)
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if err != nil {
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return nil, err
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}
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if err := rt.ConnectionSuccess(&to); err != nil {
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return nil, err
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}
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return resp.Response, nil
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}
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