rewrite network interface
This commit is contained in:
parent
d3edad474e
commit
4a02e1ff2f
@ -1,144 +1,136 @@
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package network
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import (
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"crypto/sha256"
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"fmt"
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"io"
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"sync"
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"time"
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"github.com/google/uuid"
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"github.com/micro/go-micro/config/options"
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"github.com/micro/go-micro/network/proxy"
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"github.com/micro/go-micro/network/proxy/mucp"
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"github.com/micro/go-micro/network/resolver"
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"github.com/micro/go-micro/network/router"
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"github.com/micro/go-micro/registry"
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pb "github.com/micro/go-micro/network/proto"
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nreg "github.com/micro/go-micro/network/resolver/registry"
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"github.com/micro/go-micro/network/transport"
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"github.com/micro/go-micro/util/addr"
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)
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// default network implementation
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type network struct {
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options.Options
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// resolver use to connect to the network
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resolver resolver.Resolver
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// router used to find routes in the network
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router router.Router
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// proxy used to route through the network
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proxy proxy.Proxy
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// name of this network
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// name of the network
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name string
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// links maintained for this network
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// based on peers not nodes. maybe maintain
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// node separately or note that links have nodes
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mtx sync.RWMutex
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links []Link
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// transport
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transport transport.Transport
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}
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// network methods
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type listener struct {
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// start accepting once
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once sync.Once
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// close channel to close the connection
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closed chan bool
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// the listener
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listener transport.Listener
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// the connection queue
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conns chan Conn
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}
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// lease generates a new lease with a node id/address
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// TODO: use a consensus mechanism, pool or some deterministic
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// unique addressing method.
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func (n *network) lease(muid string) *pb.Lease {
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// create the id
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id := uuid.New().String()
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// create a timestamp
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now := time.Now().UnixNano()
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// create the address by hashing the id and timestamp
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h := sha256.New()
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h.Write([]byte(fmt.Sprintf("%s-%d\n", id, now)))
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// magic new address
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address := fmt.Sprintf("%x", h.Sum(nil))
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// return the node
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return &pb.Lease{
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Id: id,
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Timestamp: now,
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Node: &pb.Node{
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Muid: muid,
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Id: id,
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Address: address,
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Network: n.name,
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func (n *network) Create() (*Node, error) {
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ip, err := addr.Extract("")
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if err != nil {
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return nil, err
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}
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return &Node{
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Id: fmt.Sprintf("%s-%s", n.name, uuid.New().String()),
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Address: ip,
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Metadata: map[string]string{
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"network": n.Name(),
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},
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}
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}
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// lookup returns a list of network records in priority order of local
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func (n *network) lookup(r registry.Registry) []*resolver.Record {
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// create a registry resolver to find local nodes
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rr := nreg.Resolver{Registry: r}
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// get all the nodes for the network that are local
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localRecords, err := rr.Resolve(n.Name())
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if err != nil {
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// we're not in a good place here
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}
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// if its a local network we never try lookup anything else
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if n.Name() == "local" {
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return localRecords
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}
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// now resolve incrementally based on resolvers specified
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networkRecords, err := n.resolver.Resolve(n.Name())
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if err != nil {
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// still not in a good place
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}
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// return aggregate records
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return append(localRecords, networkRecords...)
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}, nil
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}
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func (n *network) Name() string {
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return n.name
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}
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// Connect connects to the network and returns a new node.
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// The node is the callers connection to the network. They
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// should advertise this address to people. Anyone else
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// on the network should be able to route to it.
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func (n *network) Connect() (Node, error) {
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return newNode(n)
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func (n *network) Connect(node *Node) (Conn, error) {
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c, err := n.transport.Dial(node.Address)
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if err != nil {
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return nil, err
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}
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return newLink(c.(transport.Socket)), nil
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}
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// Peer is used to establish a link between two networks.
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// e.g micro.mu connects to example.com and share routes
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// This is done by creating a new node on both networks
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// and creating a link between them.
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func (n *network) Peer(Network) (Link, error) {
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// New network was created using NewNetwork after receiving routes from a different node
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// Connect to the new network and be assigned a node
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// Transfer data between the networks
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// take other resolver
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// order: registry (local), ...resolver
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// resolve the network
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// periodically connect to nodes resolved in the network
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// and add to the network links
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return nil, nil
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func (n *network) Listen(node *Node) (Listener, error) {
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l, err := n.transport.Listen(node.Address)
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if err != nil {
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return nil, err
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}
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return newListener(l), nil
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}
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func (l *listener) process() {
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if err := l.listener.Accept(l.accept); err != nil {
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// close the listener
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l.Close()
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}
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}
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func (l *listener) accept(sock transport.Socket) {
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// create a new link and pass it through
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link := newLink(sock)
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// send it
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l.conns <- link
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// wait for it to be closed
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select {
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case <-l.closed:
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return
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case <-link.closed:
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return
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}
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}
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func (l *listener) Address() string {
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return l.listener.Addr()
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}
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func (l *listener) Close() error {
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select {
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case <-l.closed:
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return nil
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default:
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close(l.closed)
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}
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return nil
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}
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func (l *listener) Accept() (Conn, error) {
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l.once.Do(func() {
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// TODO: catch the error
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go l.process()
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})
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select {
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case c := <-l.conns:
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return c, nil
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case <-l.closed:
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return nil, io.EOF
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}
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}
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func newListener(l transport.Listener) *listener {
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return &listener{
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closed: make(chan bool),
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conns: make(chan Conn),
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listener: l,
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}
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}
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// newNetwork returns a new network interface
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func newNetwork(opts ...options.Option) *network {
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options := options.NewOptions(opts...)
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// new network instance with defaults
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net := &network{
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Options: options,
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name: DefaultName,
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router: router.DefaultRouter,
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proxy: new(mucp.Proxy),
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resolver: new(nreg.Resolver),
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transport: transport.DefaultTransport,
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}
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// get network name
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@ -147,22 +139,10 @@ func newNetwork(opts ...options.Option) *network {
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net.name = name.(string)
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}
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// get router
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r, ok := options.Values().Get("network.router")
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// get network transport
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t, ok := options.Values().Get("network.transport")
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if ok {
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net.router = r.(router.Router)
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}
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// get proxy
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p, ok := options.Values().Get("network.proxy")
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if ok {
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net.proxy = p.(proxy.Proxy)
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}
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// get resolver
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res, ok := options.Values().Get("network.resolver")
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if ok {
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net.resolver = res.(resolver.Resolver)
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net.transport = t.(transport.Transport)
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}
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return net
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86
network/default_test.go
Normal file
86
network/default_test.go
Normal file
@ -0,0 +1,86 @@
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package network
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import (
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"io"
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"testing"
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)
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func TestNetwork(t *testing.T) {
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// create a new network
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n := newNetwork()
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// create a new node
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node, err := n.Create()
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if err != nil {
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t.Fatal(err)
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}
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// set ourselves a random port
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node.Address = node.Address + ":0"
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l, err := n.Listen(node)
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if err != nil {
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t.Fatal(err)
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}
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wait := make(chan error)
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go func() {
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var gerr error
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for {
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c, err := l.Accept()
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if err != nil {
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gerr = err
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break
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}
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m := new(Message)
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if err := c.Recv(m); err != nil {
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gerr = err
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break
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}
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if err := c.Send(m); err != nil {
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gerr = err
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break
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}
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}
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wait <- gerr
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}()
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node.Address = l.Address()
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// connect to the node
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conn, err := n.Connect(node)
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if err != nil {
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t.Fatal(err)
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}
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// send a message
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if err := conn.Send(&Message{
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Header: map[string]string{"Foo": "bar"},
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Body: []byte(`hello world`),
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}); err != nil {
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t.Fatal(err)
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}
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m := new(Message)
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// send a message
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if err := conn.Recv(m); err != nil {
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t.Fatal(err)
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}
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if m.Header["Foo"] != "bar" {
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t.Fatalf("Received unexpected message %+v", m)
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}
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// close the listener
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l.Close()
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// get listener error
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err = <-wait
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if err != io.EOF {
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t.Fatal(err)
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}
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}
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239
network/link.go
239
network/link.go
@ -5,18 +5,11 @@ import (
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"io"
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"sync"
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gproto "github.com/golang/protobuf/proto"
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"github.com/google/uuid"
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"github.com/micro/go-micro/codec"
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"github.com/micro/go-micro/codec/proto"
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pb "github.com/micro/go-micro/network/proto"
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"github.com/micro/go-micro/network/transport"
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)
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type link struct {
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// the embedded node
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*node
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closed chan bool
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sync.RWMutex
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@ -29,15 +22,9 @@ type link struct {
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// the recv queue to the socket
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recvQueue chan *Message
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// codec we use to marshal things
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codec codec.Marshaler
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// the socket for this link
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socket transport.Socket
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// the lease for this link
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lease *pb.Lease
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// determines the cost of the link
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// based on queue length and roundtrip
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length int
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@ -48,17 +35,16 @@ var (
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ErrLinkClosed = errors.New("link closed")
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)
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func newLink(n *node, sock transport.Socket, lease *pb.Lease) *link {
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return &link{
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func newLink(sock transport.Socket) *link {
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l := &link{
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id: uuid.New().String(),
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closed: make(chan bool),
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codec: &proto.Marshaler{},
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node: n,
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lease: lease,
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socket: sock,
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closed: make(chan bool),
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sendQueue: make(chan *Message, 128),
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recvQueue: make(chan *Message, 128),
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}
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go l.process()
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return l
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}
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// link methods
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@ -69,13 +55,7 @@ func (l *link) process() {
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go func() {
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for {
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m := new(Message)
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if err := l.recv(m, nil); err != nil {
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return
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}
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// check if it's an internal close method
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if m.Header["Micro-Method"] == "close" {
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l.Close()
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if err := l.recv(m); err != nil {
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return
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}
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@ -90,7 +70,7 @@ func (l *link) process() {
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for {
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select {
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case m := <-l.sendQueue:
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if err := l.send(m, nil); err != nil {
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if err := l.send(m); err != nil {
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return
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}
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case <-l.closed:
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@ -99,169 +79,17 @@ func (l *link) process() {
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}
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}
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// accept waits for the connect message from the remote end
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// if it receives anything else it throws an error
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func (l *link) accept() error {
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for {
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m := new(transport.Message)
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err := l.socket.Recv(m)
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if err == io.EOF {
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return nil
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}
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if err != nil {
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return err
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}
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// TODO: pick a reliable header
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event := m.Header["Micro-Method"]
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switch event {
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// connect event
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case "connect":
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// process connect events from network.Connect()
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// these are new connections to join the network
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// decode the connection event
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conn := new(pb.Connect)
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// expecting a connect message
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if err := l.codec.Unmarshal(m.Body, conn); err != nil {
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// skip error
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continue
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}
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// no micro id close the link
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if len(conn.Muid) == 0 {
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l.Close()
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return errors.New("invalid muid " + conn.Muid)
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}
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// get the existing lease if it exists
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lease := conn.Lease
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// if there's no lease create a new one
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if lease == nil {
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// create a new lease/node
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lease = l.node.network.lease(conn.Muid)
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}
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// check if we connected to ourself
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if conn.Muid == l.node.muid {
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// check our own leasae
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l.node.Lock()
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if l.node.lease == nil {
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l.node.lease = lease
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}
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l.node.Unlock()
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}
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// set the author to our own muid
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lease.Author = l.node.muid
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// send back a lease offer for the node
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if err := l.send(&Message{
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Header: map[string]string{
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"Micro-Method": "lease",
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},
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}, lease); err != nil {
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return err
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}
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// the lease is saved
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l.Lock()
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l.lease = lease
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l.Unlock()
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// we've connected
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// start processing the messages
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go l.process()
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return nil
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case "close":
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l.Close()
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return io.EOF
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default:
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return errors.New("unknown method: " + event)
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}
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}
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}
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// connect sends a connect request and waits on a lease.
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// this is for a new connection. in the event we send
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// an existing lease, the same lease should be returned.
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// if it differs then we assume our address for this link
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// is different...
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func (l *link) connect() error {
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// get the current lease
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l.RLock()
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lease := l.lease
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l.RUnlock()
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// send a lease request
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if err := l.send(&Message{
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Header: map[string]string{
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"Micro-Method": "connect",
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},
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}, &pb.Connect{Muid: l.node.muid, Lease: lease}); err != nil {
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return err
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}
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// create the new things
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tm := new(Message)
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newLease := new(pb.Lease)
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// wait for a response, hopefully a lease
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if err := l.recv(tm, newLease); err != nil {
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return err
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}
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event := tm.Header["Micro-Method"]
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// check the method
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switch event {
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case "lease":
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// save the lease
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l.Lock()
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l.lease = newLease
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l.Unlock()
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// start processing the messages
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go l.process()
|
||||
case "close":
|
||||
l.Close()
|
||||
return io.EOF
|
||||
default:
|
||||
l.Close()
|
||||
return errors.New("unable to attain lease")
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// send a message over the link
|
||||
func (l *link) send(m *Message, v interface{}) error {
|
||||
func (l *link) send(m *Message) error {
|
||||
tm := new(transport.Message)
|
||||
tm.Header = m.Header
|
||||
tm.Body = m.Body
|
||||
|
||||
// set the body if not nil
|
||||
// we're assuming this is network message
|
||||
if v != nil {
|
||||
// encode the data
|
||||
b, err := l.codec.Marshal(v)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// set the content type
|
||||
tm.Header["Content-Type"] = "application/protobuf"
|
||||
// set the marshalled body
|
||||
tm.Body = b
|
||||
}
|
||||
|
||||
// send via the transport socket
|
||||
return l.socket.Send(tm)
|
||||
}
|
||||
|
||||
// recv a message on the link
|
||||
func (l *link) recv(m *Message, v interface{}) error {
|
||||
func (l *link) recv(m *Message) error {
|
||||
if m.Header == nil {
|
||||
m.Header = make(map[string]string)
|
||||
}
|
||||
@ -277,19 +105,7 @@ func (l *link) recv(m *Message, v interface{}) error {
|
||||
m.Header = tm.Header
|
||||
m.Body = tm.Body
|
||||
|
||||
// bail early
|
||||
if v == nil {
|
||||
return nil
|
||||
}
|
||||
|
||||
// try unmarshal the body
|
||||
// skip if there's no content-type
|
||||
if tm.Header["Content-Type"] != "application/protobuf" {
|
||||
return nil
|
||||
}
|
||||
|
||||
// return unmarshalled
|
||||
return l.codec.Unmarshal(m.Body, v.(gproto.Message))
|
||||
}
|
||||
|
||||
// Close the link
|
||||
@ -299,35 +115,27 @@ func (l *link) Close() error {
|
||||
return nil
|
||||
default:
|
||||
close(l.closed)
|
||||
return l.socket.Close()
|
||||
}
|
||||
|
||||
// send a final close message
|
||||
return l.socket.Send(&transport.Message{
|
||||
Header: map[string]string{
|
||||
"Micro-Method": "close",
|
||||
},
|
||||
})
|
||||
}
|
||||
|
||||
// returns the node id
|
||||
func (l *link) Id() string {
|
||||
l.RLock()
|
||||
defer l.RUnlock()
|
||||
if l.lease == nil {
|
||||
return ""
|
||||
}
|
||||
return l.lease.Node.Id
|
||||
return l.id
|
||||
}
|
||||
|
||||
// Address of the node we're connected to
|
||||
func (l *link) Address() string {
|
||||
func (l *link) Remote() string {
|
||||
l.RLock()
|
||||
defer l.RUnlock()
|
||||
if l.lease == nil {
|
||||
return l.socket.Remote()
|
||||
}
|
||||
// the node in the lease
|
||||
return l.lease.Node.Address
|
||||
}
|
||||
|
||||
func (l *link) Local() string {
|
||||
l.RLock()
|
||||
defer l.RUnlock()
|
||||
return l.socket.Local()
|
||||
}
|
||||
|
||||
func (l *link) Length() int {
|
||||
@ -341,15 +149,16 @@ func (l *link) Weight() int {
|
||||
}
|
||||
|
||||
// Accept accepts a message on the socket
|
||||
func (l *link) Accept() (*Message, error) {
|
||||
func (l *link) Recv(m *Message) error {
|
||||
select {
|
||||
case <-l.closed:
|
||||
return nil, io.EOF
|
||||
case m := <-l.recvQueue:
|
||||
return m, nil
|
||||
return io.EOF
|
||||
case rm := <-l.recvQueue:
|
||||
*m = *rm
|
||||
return nil
|
||||
}
|
||||
// never reach
|
||||
return nil, nil
|
||||
return nil
|
||||
}
|
||||
|
||||
// Send sends a message on the socket immediately
|
||||
|
@ -10,45 +10,45 @@ import (
|
||||
// is responsible for routing messages to the correct services.
|
||||
type Network interface {
|
||||
options.Options
|
||||
// Create starts the network
|
||||
Create() (*Node, error)
|
||||
// Name of the network
|
||||
Name() string
|
||||
// Connect to the network
|
||||
Connect() (Node, error)
|
||||
// Peer with a neighboring network
|
||||
Peer(Network) (Link, error)
|
||||
// Connect to a node
|
||||
Connect(*Node) (Conn, error)
|
||||
// Listen for connections
|
||||
Listen(*Node) (Listener, error)
|
||||
}
|
||||
|
||||
// Node represents a single node on a network
|
||||
type Node interface {
|
||||
// Id of the node
|
||||
Id() string
|
||||
// Address of the node
|
||||
type Node struct {
|
||||
Id string
|
||||
Address string
|
||||
Metadata map[string]string
|
||||
}
|
||||
|
||||
type Listener interface {
|
||||
Address() string
|
||||
// The network of the node
|
||||
Network() string
|
||||
// Close the network connection
|
||||
Close() error
|
||||
// Accept messages on the network
|
||||
Accept() (*Message, error)
|
||||
// Send a message to the network
|
||||
Accept() (Conn, error)
|
||||
}
|
||||
|
||||
type Conn interface {
|
||||
// Unique id of the connection
|
||||
Id() string
|
||||
// Close the connection
|
||||
Close() error
|
||||
// Send a message
|
||||
Send(*Message) error
|
||||
// Receive a message
|
||||
Recv(*Message) error
|
||||
// The remote node
|
||||
Remote() string
|
||||
// The local node
|
||||
Local() string
|
||||
}
|
||||
|
||||
// Link is a connection between one network and another
|
||||
type Link interface {
|
||||
// remote node the link is peered with
|
||||
Node
|
||||
// length defines the speed or distance of the link
|
||||
Length() int
|
||||
// weight defines the saturation or usage of the link
|
||||
Weight() int
|
||||
}
|
||||
|
||||
// Message is the base type for opaque data
|
||||
type Message struct {
|
||||
// Headers which provide local/remote info
|
||||
Header map[string]string
|
||||
// The opaque data being sent
|
||||
Body []byte
|
||||
}
|
||||
|
||||
|
@ -1,44 +0,0 @@
|
||||
package mucp
|
||||
|
||||
import (
|
||||
"github.com/micro/go-micro/network/transport"
|
||||
)
|
||||
|
||||
type listener struct {
|
||||
// stream id
|
||||
id string
|
||||
// address of the listener
|
||||
addr string
|
||||
// close channel
|
||||
closed chan bool
|
||||
// accept socket
|
||||
accept chan *socket
|
||||
}
|
||||
|
||||
func (n *listener) Addr() string {
|
||||
return n.addr
|
||||
}
|
||||
|
||||
func (n *listener) Close() error {
|
||||
select {
|
||||
case <-n.closed:
|
||||
default:
|
||||
close(n.closed)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (n *listener) Accept(fn func(s transport.Socket)) error {
|
||||
for {
|
||||
select {
|
||||
case <-n.closed:
|
||||
return nil
|
||||
case s, ok := <-n.accept:
|
||||
if !ok {
|
||||
return nil
|
||||
}
|
||||
go fn(s)
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
@ -1,342 +0,0 @@
|
||||
// Package mucp provides a mucp network transport
|
||||
package mucp
|
||||
|
||||
import (
|
||||
"context"
|
||||
"crypto/sha256"
|
||||
"errors"
|
||||
"fmt"
|
||||
"sync"
|
||||
|
||||
"github.com/micro/go-micro/network"
|
||||
"github.com/micro/go-micro/network/transport"
|
||||
)
|
||||
|
||||
type networkKey struct{}
|
||||
|
||||
// Transport is a mucp transport. It should only
|
||||
// be created with NewTransport and cast to
|
||||
// *Transport if there's a need to close it.
|
||||
type Transport struct {
|
||||
options transport.Options
|
||||
|
||||
// the network interface
|
||||
network network.Network
|
||||
|
||||
// protect all the things
|
||||
sync.RWMutex
|
||||
|
||||
// connect
|
||||
connected bool
|
||||
// connected node
|
||||
node network.Node
|
||||
// the send channel
|
||||
send chan *message
|
||||
// close channel
|
||||
closed chan bool
|
||||
|
||||
// sockets
|
||||
sockets map[string]*socket
|
||||
// listeners
|
||||
listeners map[string]*listener
|
||||
}
|
||||
|
||||
func (n *Transport) newListener(addr string) *listener {
|
||||
// hash the id
|
||||
h := sha256.New()
|
||||
h.Write([]byte(addr))
|
||||
id := fmt.Sprintf("%x", h.Sum(nil))
|
||||
|
||||
// create the listener
|
||||
l := &listener{
|
||||
id: id,
|
||||
addr: addr,
|
||||
closed: make(chan bool),
|
||||
accept: make(chan *socket, 128),
|
||||
}
|
||||
|
||||
// save it
|
||||
n.Lock()
|
||||
n.listeners[id] = l
|
||||
n.Unlock()
|
||||
|
||||
return l
|
||||
}
|
||||
|
||||
func (n *Transport) getListener(id string) (*listener, bool) {
|
||||
// get the listener
|
||||
n.RLock()
|
||||
s, ok := n.listeners[id]
|
||||
n.RUnlock()
|
||||
return s, ok
|
||||
}
|
||||
|
||||
func (n *Transport) getSocket(id string) (*socket, bool) {
|
||||
// get the socket
|
||||
n.RLock()
|
||||
s, ok := n.sockets[id]
|
||||
n.RUnlock()
|
||||
return s, ok
|
||||
}
|
||||
|
||||
func (n *Transport) newSocket(id string) *socket {
|
||||
// hash the id
|
||||
h := sha256.New()
|
||||
h.Write([]byte(id))
|
||||
id = fmt.Sprintf("%x", h.Sum(nil))
|
||||
|
||||
// new socket
|
||||
s := &socket{
|
||||
id: id,
|
||||
closed: make(chan bool),
|
||||
recv: make(chan *message, 128),
|
||||
send: n.send,
|
||||
}
|
||||
|
||||
// save socket
|
||||
n.Lock()
|
||||
n.sockets[id] = s
|
||||
n.Unlock()
|
||||
|
||||
// return socket
|
||||
return s
|
||||
}
|
||||
|
||||
// process outgoing messages
|
||||
func (n *Transport) process() {
|
||||
// manage the send buffer
|
||||
// all pseudo sockets throw everything down this
|
||||
for {
|
||||
select {
|
||||
case msg := <-n.send:
|
||||
netmsg := &network.Message{
|
||||
Header: msg.data.Header,
|
||||
Body: msg.data.Body,
|
||||
}
|
||||
|
||||
// set the stream id on the outgoing message
|
||||
netmsg.Header["Micro-Stream"] = msg.id
|
||||
|
||||
// send the message via the interface
|
||||
if err := n.node.Send(netmsg); err != nil {
|
||||
// no op
|
||||
// TODO: do something
|
||||
}
|
||||
case <-n.closed:
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// process incoming messages
|
||||
func (n *Transport) listen() {
|
||||
for {
|
||||
// process anything via the net interface
|
||||
msg, err := n.node.Accept()
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
|
||||
// a stream id
|
||||
id := msg.Header["Micro-Stream"]
|
||||
|
||||
// get the socket
|
||||
s, exists := n.getSocket(id)
|
||||
if !exists {
|
||||
// get the listener
|
||||
l, ok := n.getListener(id)
|
||||
// there's no socket and there's no listener
|
||||
if !ok {
|
||||
continue
|
||||
}
|
||||
|
||||
// listener is closed
|
||||
select {
|
||||
case <-l.closed:
|
||||
// delete it
|
||||
n.Lock()
|
||||
delete(n.listeners, l.id)
|
||||
n.Unlock()
|
||||
continue
|
||||
default:
|
||||
}
|
||||
|
||||
// no socket, create one
|
||||
s = n.newSocket(id)
|
||||
// set remote address
|
||||
s.remote = msg.Header["Remote"]
|
||||
|
||||
// drop that to the listener
|
||||
// TODO: non blocking
|
||||
l.accept <- s
|
||||
}
|
||||
|
||||
// is the socket closed?
|
||||
select {
|
||||
case <-s.closed:
|
||||
// closed
|
||||
delete(n.sockets, id)
|
||||
continue
|
||||
default:
|
||||
// process
|
||||
}
|
||||
|
||||
tmsg := &transport.Message{
|
||||
Header: msg.Header,
|
||||
Body: msg.Body,
|
||||
}
|
||||
|
||||
// TODO: don't block on queuing
|
||||
// append to recv backlog
|
||||
s.recv <- &message{id: id, data: tmsg}
|
||||
}
|
||||
}
|
||||
|
||||
func (n *Transport) Init(opts ...transport.Option) error {
|
||||
for _, o := range opts {
|
||||
o(&n.options)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (n *Transport) Options() transport.Options {
|
||||
return n.options
|
||||
}
|
||||
|
||||
// Close the tunnel
|
||||
func (n *Transport) Close() error {
|
||||
n.Lock()
|
||||
defer n.Unlock()
|
||||
|
||||
if !n.connected {
|
||||
return nil
|
||||
}
|
||||
|
||||
select {
|
||||
case <-n.closed:
|
||||
return nil
|
||||
default:
|
||||
// close all the sockets
|
||||
for _, s := range n.sockets {
|
||||
s.Close()
|
||||
}
|
||||
for _, l := range n.listeners {
|
||||
l.Close()
|
||||
}
|
||||
// close the connection
|
||||
close(n.closed)
|
||||
// close node connection
|
||||
n.node.Close()
|
||||
// reset connected
|
||||
n.connected = false
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Connect the tunnel
|
||||
func (n *Transport) Connect() error {
|
||||
n.Lock()
|
||||
defer n.Unlock()
|
||||
|
||||
// already connected
|
||||
if n.connected {
|
||||
return nil
|
||||
}
|
||||
|
||||
// get a new node
|
||||
node, err := n.network.Connect()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// set as connected
|
||||
n.connected = true
|
||||
// create new close channel
|
||||
n.closed = make(chan bool)
|
||||
// save node
|
||||
n.node = node
|
||||
|
||||
// process messages to be sent
|
||||
go n.process()
|
||||
// process incoming messages
|
||||
go n.listen()
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Dial an address
|
||||
func (n *Transport) Dial(addr string, opts ...transport.DialOption) (transport.Client, error) {
|
||||
if err := n.Connect(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// create new socket
|
||||
s := n.newSocket(addr)
|
||||
// set remote
|
||||
s.remote = addr
|
||||
// set local
|
||||
n.RLock()
|
||||
s.local = n.node.Address()
|
||||
n.RUnlock()
|
||||
|
||||
return s, nil
|
||||
}
|
||||
|
||||
func (n *Transport) Listen(addr string, opts ...transport.ListenOption) (transport.Listener, error) {
|
||||
// check existing listeners
|
||||
n.RLock()
|
||||
for _, l := range n.listeners {
|
||||
if l.addr == addr {
|
||||
n.RUnlock()
|
||||
return nil, errors.New("already listening on " + addr)
|
||||
}
|
||||
}
|
||||
n.RUnlock()
|
||||
|
||||
// try to connect to the network
|
||||
if err := n.Connect(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return n.newListener(addr), nil
|
||||
}
|
||||
|
||||
func (n *Transport) String() string {
|
||||
return "network"
|
||||
}
|
||||
|
||||
// NewTransport creates a new network transport
|
||||
func NewTransport(opts ...transport.Option) transport.Transport {
|
||||
options := transport.Options{
|
||||
Context: context.Background(),
|
||||
}
|
||||
|
||||
for _, o := range opts {
|
||||
o(&options)
|
||||
}
|
||||
|
||||
// get the network interface
|
||||
n, ok := options.Context.Value(networkKey{}).(network.Network)
|
||||
if !ok {
|
||||
n = network.DefaultNetwork
|
||||
}
|
||||
|
||||
return &Transport{
|
||||
options: options,
|
||||
network: n,
|
||||
send: make(chan *message, 128),
|
||||
closed: make(chan bool),
|
||||
sockets: make(map[string]*socket),
|
||||
}
|
||||
}
|
||||
|
||||
// WithNetwork sets the network interface
|
||||
func WithNetwork(n network.Network) transport.Option {
|
||||
return func(o *transport.Options) {
|
||||
if o.Context == nil {
|
||||
o.Context = context.Background()
|
||||
}
|
||||
o.Context = context.WithValue(o.Context, networkKey{}, n)
|
||||
}
|
||||
}
|
@ -1,80 +0,0 @@
|
||||
package mucp
|
||||
|
||||
import (
|
||||
"errors"
|
||||
|
||||
"github.com/micro/go-micro/network/transport"
|
||||
)
|
||||
|
||||
// socket is our pseudo socket for transport.Socket
|
||||
type socket struct {
|
||||
// socket id based on Micro-Stream
|
||||
id string
|
||||
// closed
|
||||
closed chan bool
|
||||
// remote addr
|
||||
remote string
|
||||
// local addr
|
||||
local string
|
||||
// send chan
|
||||
send chan *message
|
||||
// recv chan
|
||||
recv chan *message
|
||||
}
|
||||
|
||||
// message is sent over the send channel
|
||||
type message struct {
|
||||
// socket id
|
||||
id string
|
||||
// transport data
|
||||
data *transport.Message
|
||||
}
|
||||
|
||||
func (s *socket) Remote() string {
|
||||
return s.remote
|
||||
}
|
||||
|
||||
func (s *socket) Local() string {
|
||||
return s.local
|
||||
}
|
||||
|
||||
func (s *socket) Id() string {
|
||||
return s.id
|
||||
}
|
||||
|
||||
func (s *socket) Send(m *transport.Message) error {
|
||||
select {
|
||||
case <-s.closed:
|
||||
return errors.New("socket is closed")
|
||||
default:
|
||||
// no op
|
||||
}
|
||||
// append to backlog
|
||||
s.send <- &message{id: s.id, data: m}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (s *socket) Recv(m *transport.Message) error {
|
||||
select {
|
||||
case <-s.closed:
|
||||
return errors.New("socket is closed")
|
||||
default:
|
||||
// no op
|
||||
}
|
||||
// recv from backlog
|
||||
msg := <-s.recv
|
||||
// set message
|
||||
*m = *msg.data
|
||||
// return nil
|
||||
return nil
|
||||
}
|
||||
|
||||
func (s *socket) Close() error {
|
||||
select {
|
||||
case <-s.closed:
|
||||
// no op
|
||||
default:
|
||||
close(s.closed)
|
||||
}
|
||||
return nil
|
||||
}
|
@ -1,61 +0,0 @@
|
||||
package mucp
|
||||
|
||||
import (
|
||||
"testing"
|
||||
|
||||
"github.com/micro/go-micro/network/transport"
|
||||
)
|
||||
|
||||
func TestTunnelSocket(t *testing.T) {
|
||||
s := &socket{
|
||||
id: "1",
|
||||
closed: make(chan bool),
|
||||
remote: "remote",
|
||||
local: "local",
|
||||
send: make(chan *message, 1),
|
||||
recv: make(chan *message, 1),
|
||||
}
|
||||
|
||||
// check addresses local and remote
|
||||
if s.Local() != s.local {
|
||||
t.Fatalf("Expected s.Local %s got %s", s.local, s.Local())
|
||||
}
|
||||
if s.Remote() != s.remote {
|
||||
t.Fatalf("Expected s.Remote %s got %s", s.remote, s.Remote())
|
||||
}
|
||||
|
||||
// send a message
|
||||
s.Send(&transport.Message{Header: map[string]string{}})
|
||||
|
||||
// get sent message
|
||||
msg := <-s.send
|
||||
|
||||
if msg.id != s.id {
|
||||
t.Fatalf("Expected sent message id %s got %s", s.id, msg.id)
|
||||
}
|
||||
|
||||
// recv a message
|
||||
msg.data.Header["Foo"] = "bar"
|
||||
s.recv <- msg
|
||||
|
||||
m := new(transport.Message)
|
||||
s.Recv(m)
|
||||
|
||||
// check header
|
||||
if m.Header["Foo"] != "bar" {
|
||||
t.Fatalf("Did not receive correct message %+v", m)
|
||||
}
|
||||
|
||||
// close the connection
|
||||
s.Close()
|
||||
|
||||
// check connection
|
||||
err := s.Send(m)
|
||||
if err == nil {
|
||||
t.Fatal("Expected closed connection")
|
||||
}
|
||||
err = s.Recv(m)
|
||||
if err == nil {
|
||||
t.Fatal("Expected closed connection")
|
||||
}
|
||||
}
|
Loading…
x
Reference in New Issue
Block a user