2019-09-05 00:16:22 +01:00
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// Package handler implements network RPC handler
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2019-09-02 11:42:45 +01:00
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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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2019-10-09 17:13:52 +01:00
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"github.com/micro/go-micro/router"
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2019-09-02 11:42:45 +01:00
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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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2019-09-23 15:41:05 +01:00
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func flatten(n network.Node, visited map[string]bool) []network.Node {
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// if node is nil runaway
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if n == nil {
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return nil
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}
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// set visisted
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if visited == nil {
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visited = make(map[string]bool)
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}
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// create new list of nodes
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var nodes []network.Node
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2019-10-10 14:35:11 +01:00
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// check if already visited
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if visited[n.Id()] == false {
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// append the current node
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nodes = append(nodes, n)
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}
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2019-09-23 15:41:05 +01:00
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// set to visited
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visited[n.Id()] = true
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// visit the list of peers
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for _, node := range n.Peers() {
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nodes = append(nodes, flatten(node, visited)...)
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}
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return nodes
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}
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// Nodes returns the list of nodes
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func (n *Network) Nodes(ctx context.Context, req *pbNet.NodesRequest, resp *pbNet.NodesResponse) error {
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depth := uint(req.Depth)
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if depth <= 0 || depth > network.MaxDepth {
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depth = network.MaxDepth
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}
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// root node
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nodes := map[string]network.Node{}
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// get peers encoded into protobuf
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peers := flatten(n.Network, nil)
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// walk all the peers
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for _, peer := range peers {
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if peer == nil {
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continue
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}
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if _, ok := nodes[peer.Id()]; ok {
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continue
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}
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// add to visited list
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nodes[n.Network.Id()] = peer
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resp.Nodes = append(resp.Nodes, &pbNet.Node{
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Id: peer.Id(),
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Address: peer.Address(),
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})
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}
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return nil
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}
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// Graph returns the network graph from this root node
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func (n *Network) Graph(ctx context.Context, req *pbNet.GraphRequest, resp *pbNet.GraphResponse) error {
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2019-09-11 23:03:27 +01:00
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depth := uint(req.Depth)
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if depth <= 0 || depth > network.MaxDepth {
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depth = network.MaxDepth
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2019-09-02 17:06:21 +01:00
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}
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2019-09-11 23:56:57 +01:00
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// get peers encoded into protobuf
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2019-09-13 03:02:20 +01:00
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peers := network.PeersToProto(n.Network, depth)
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2019-09-11 23:03:27 +01:00
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2019-09-23 15:41:05 +01:00
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// set the root node
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resp.Root = peers
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2019-09-10 01:14:23 +01:00
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return nil
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}
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2019-09-23 15:41:05 +01:00
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// Routes returns a list of routing table routes
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func (n *Network) Routes(ctx context.Context, req *pbNet.RoutesRequest, resp *pbNet.RoutesResponse) error {
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2019-10-09 17:13:52 +01:00
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// build query
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var qOpts []router.QueryOption
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if q := req.Query; q != nil {
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if len(q.Service) > 0 {
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qOpts = append(qOpts, router.QueryService(q.Service))
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}
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if len(q.Address) > 0 {
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qOpts = append(qOpts, router.QueryAddress(q.Address))
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}
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if len(q.Gateway) > 0 {
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qOpts = append(qOpts, router.QueryGateway(q.Gateway))
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}
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if len(q.Router) > 0 {
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qOpts = append(qOpts, router.QueryRouter(q.Router))
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}
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if len(q.Network) > 0 {
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qOpts = append(qOpts, router.QueryNetwork(q.Network))
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}
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}
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routes, err := n.Network.Options().Router.Table().Query(qOpts...)
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2019-09-10 01:14:23 +01:00
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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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2019-09-02 17:06:21 +01:00
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2019-09-02 11:42:45 +01:00
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return nil
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}
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2019-09-30 07:51:13 +01:00
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// Services returns a list of services based on the routing table
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func (n *Network) Services(ctx context.Context, req *pbNet.ServicesRequest, resp *pbNet.ServicesResponse) 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 services: %s", err)
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}
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services := make(map[string]bool)
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for _, route := range routes {
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if _, ok := services[route.Service]; ok {
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continue
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}
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services[route.Service] = true
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resp.Services = append(resp.Services, route.Service)
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}
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return nil
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}
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