125 lines
3.1 KiB
Go
125 lines
3.1 KiB
Go
// Package handler implements network RPC handler
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package handler
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import (
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"context"
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"github.com/micro/go-micro/errors"
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"github.com/micro/go-micro/network"
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pbNet "github.com/micro/go-micro/network/proto"
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pbRtr "github.com/micro/go-micro/router/proto"
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)
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// Network implements network handler
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type Network struct {
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Network network.Network
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}
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// ListNodes returns a list of all accessible nodes in the network
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func (n *Network) ListNodes(ctx context.Context, req *pbNet.ListRequest, resp *pbNet.ListResponse) error {
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networkNodes := n.Network.Nodes()
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var nodes []*pbNet.Node
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for _, networkNode := range networkNodes {
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node := &pbNet.Node{
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Id: networkNode.Id(),
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Address: networkNode.Address(),
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}
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nodes = append(nodes, node)
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}
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resp.Nodes = nodes
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return nil
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}
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// ListPeers returns a list of all the nodes the node has a direct link with
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func (n *Network) ListPeers(ctx context.Context, req *pbNet.PeerRequest, resp *pbNet.PeerResponse) error {
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nodePeers := n.Network.Peers()
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var peers []*pbNet.Node
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for _, nodePeer := range nodePeers {
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peer := &pbNet.Node{
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Id: nodePeer.Id(),
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Address: nodePeer.Address(),
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}
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peers = append(peers, peer)
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}
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resp.Peers = peers
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return nil
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}
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// toplogyToProto recursively traverses node topology and returns it
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func toplogyToProto(node network.Node, pbPeer *pbNet.Peer) *pbNet.Peer {
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// return if we reached the end of topology
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if len(node.Peers()) == 0 {
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return pbPeer
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}
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for _, topNode := range node.Peers() {
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pbNode := &pbNet.Node{
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Id: topNode.Id(),
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Address: topNode.Address(),
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}
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pbPeer := &pbNet.Peer{
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Node: pbNode,
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Peers: make([]*pbNet.Peer, 0),
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}
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peer := toplogyToProto(topNode, pbPeer)
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pbPeer.Peers = append(pbPeer.Peers, peer)
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}
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return pbPeer
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}
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// Topology returns a list of nodes in node topology i.e. it returns all (in)directly reachable nodes from this node
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func (n *Network) Topology(ctx context.Context, req *pbNet.TopologyRequest, resp *pbNet.TopologyResponse) error {
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// get node topology
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topNode := n.Network.Topology()
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// network node aka root node
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node := &pbNet.Node{
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Id: n.Network.Id(),
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Address: n.Network.Address(),
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}
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// we will build proto topology into this
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pbPeer := &pbNet.Peer{
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Node: node,
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Peers: make([]*pbNet.Peer, 0),
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}
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// return topology encoded into protobuf
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topology := toplogyToProto(topNode, pbPeer)
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resp.Topology = topology
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return nil
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}
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// ListRoutes returns a list of routing table routes
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func (n *Network) ListRoutes(ctx context.Context, req *pbRtr.Request, resp *pbRtr.ListResponse) error {
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routes, err := n.Network.Options().Router.Table().List()
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if err != nil {
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return errors.InternalServerError("go.micro.network", "failed to list routes: %s", err)
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}
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var respRoutes []*pbRtr.Route
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for _, route := range routes {
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respRoute := &pbRtr.Route{
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Service: route.Service,
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Address: route.Address,
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Gateway: route.Gateway,
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Network: route.Network,
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Router: route.Router,
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Link: route.Link,
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Metric: int64(route.Metric),
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}
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respRoutes = append(respRoutes, respRoute)
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}
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resp.Routes = respRoutes
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return nil
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}
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