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remove network

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This commit is contained in:
Asim Aslam 2019-07-09 18:45:14 +01:00
parent 0bf54c122f
commit eda380284c
4 changed files with 0 additions and 510 deletions
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164
network/default.go
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@ -1,164 +0,0 @@
package network
import (
"fmt"
"io"
"sync"
"github.com/google/uuid"
"github.com/micro/go-micro/config/options"
"github.com/micro/go-micro/transport"
"github.com/micro/go-micro/util/addr"
)
// default network implementation
type network struct {
options.Options
// name of the network
name string
// network address used where one is specified
address string
// transport
transport transport.Transport
}
type listener struct {
// start accepting once
once sync.Once
// close channel to close the connection
closed chan bool
// the listener
listener transport.Listener
// the connection queue
conns chan Conn
}
func (n *network) Create() (*Node, error) {
ip, err := addr.Extract(n.address)
if err != nil {
return nil, err
}
return &Node{
Id: fmt.Sprintf("%s-%s", n.name, uuid.New().String()),
Address: ip,
Network: n.Name(),
Metadata: map[string]string{
"network": n.String(),
"transport": n.transport.String(),
},
}, nil
}
func (n *network) Name() string {
return n.name
}
func (n *network) String() string {
return "local"
}
func (n *network) Connect(node *Node) (Conn, error) {
c, err := n.transport.Dial(node.Address)
if err != nil {
return nil, err
}
return newLink(c.(transport.Socket)), nil
}
func (n *network) Listen(node *Node) (Listener, error) {
l, err := n.transport.Listen(node.Address)
if err != nil {
return nil, err
}
return newListener(l), nil
}
func (l *listener) process() {
if err := l.listener.Accept(l.accept); err != nil {
// close the listener
l.Close()
}
}
func (l *listener) accept(sock transport.Socket) {
// create a new link and pass it through
link := newLink(sock)
// send it
l.conns <- link
// wait for it to be closed
select {
case <-l.closed:
return
case <-link.closed:
return
}
}
func (l *listener) Address() string {
return l.listener.Addr()
}
func (l *listener) Close() error {
select {
case <-l.closed:
return nil
default:
close(l.closed)
}
return nil
}
func (l *listener) Accept() (Conn, error) {
l.once.Do(func() {
// TODO: catch the error
go l.process()
})
select {
case c := <-l.conns:
return c, nil
case <-l.closed:
return nil, io.EOF
}
}
func newListener(l transport.Listener) *listener {
return &listener{
closed: make(chan bool),
conns: make(chan Conn),
listener: l,
}
}
func newNetwork(opts ...options.Option) *network {
options := options.NewOptions(opts...)
net := &network{
name: DefaultName,
transport: transport.DefaultTransport,
}
// get network name
name, ok := options.Values().Get("network.name")
if ok {
net.name = name.(string)
}
// get network name
address, ok := options.Values().Get("network.address")
if ok {
net.address = address.(string)
}
// get network transport
t, ok := options.Values().Get("network.transport")
if ok {
net.transport = t.(transport.Transport)
}
return net
}

86
network/default_test.go
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@ -1,86 +0,0 @@
package network
import (
"io"
"testing"
)
func TestNetwork(t *testing.T) {
// create a new network
n := newNetwork()
// create a new node
node, err := n.Create()
if err != nil {
t.Fatal(err)
}
// set ourselves a random port
node.Address = node.Address + ":0"
l, err := n.Listen(node)
if err != nil {
t.Fatal(err)
}
wait := make(chan error)
go func() {
var gerr error
for {
c, err := l.Accept()
if err != nil {
gerr = err
break
}
m := new(Message)
if err := c.Recv(m); err != nil {
gerr = err
break
}
if err := c.Send(m); err != nil {
gerr = err
break
}
}
wait <- gerr
}()
node.Address = l.Address()
// connect to the node
conn, err := n.Connect(node)
if err != nil {
t.Fatal(err)
}
// send a message
if err := conn.Send(&Message{
Header: map[string]string{"Foo": "bar"},
Body: []byte(`hello world`),
}); err != nil {
t.Fatal(err)
}
m := new(Message)
// send a message
if err := conn.Recv(m); err != nil {
t.Fatal(err)
}
if m.Header["Foo"] != "bar" {
t.Fatalf("Received unexpected message %+v", m)
}
// close the listener
l.Close()
// get listener error
err = <-wait
if err != io.EOF {
t.Fatal(err)
}
}

172
network/link.go
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@ -1,172 +0,0 @@
package network
import (
"errors"
"io"
"sync"
"github.com/google/uuid"
"github.com/micro/go-micro/transport"
)
type link struct {
closed chan bool
sync.RWMutex
// the link id
id string
// the send queue to the socket
sendQueue chan *Message
// the recv queue to the socket
recvQueue chan *Message
// the socket for this link
socket transport.Socket
// determines the cost of the link
// based on queue length and roundtrip
length int
weight int
}
var (
ErrLinkClosed = errors.New("link closed")
)
func newLink(sock transport.Socket) *link {
l := &link{
id: uuid.New().String(),
socket: sock,
closed: make(chan bool),
sendQueue: make(chan *Message, 128),
recvQueue: make(chan *Message, 128),
}
go l.process()
return l
}
// link methods
// process processes messages on the send queue.
// these are messages to be sent to the remote side.
func (l *link) process() {
go func() {
for {
m := new(Message)
if err := l.recv(m); err != nil {
return
}
select {
case l.recvQueue <- m:
case <-l.closed:
return
}
}
}()
for {
select {
case m := <-l.sendQueue:
if err := l.send(m); err != nil {
return
}
case <-l.closed:
return
}
}
}
// send a message over the link
func (l *link) send(m *Message) error {
tm := new(transport.Message)
tm.Header = m.Header
tm.Body = m.Body
// send via the transport socket
return l.socket.Send(tm)
}
// recv a message on the link
func (l *link) recv(m *Message) error {
if m.Header == nil {
m.Header = make(map[string]string)
}
tm := new(transport.Message)
// receive the transport message
if err := l.socket.Recv(tm); err != nil {
return err
}
// set the message
m.Header = tm.Header
m.Body = tm.Body
return nil
}
// Close the link
func (l *link) Close() error {
select {
case <-l.closed:
return nil
default:
close(l.closed)
return l.socket.Close()
}
}
// returns the node id
func (l *link) Id() string {
l.RLock()
defer l.RUnlock()
return l.id
}
func (l *link) Remote() string {
l.RLock()
defer l.RUnlock()
return l.socket.Remote()
}
func (l *link) Local() string {
l.RLock()
defer l.RUnlock()
return l.socket.Local()
}
func (l *link) Length() int {
l.RLock()
defer l.RUnlock()
return l.length
}
func (l *link) Weight() int {
return len(l.sendQueue) + len(l.recvQueue)
}
// Accept accepts a message on the socket
func (l *link) Recv(m *Message) error {
select {
case <-l.closed:
return io.EOF
case rm := <-l.recvQueue:
*m = *rm
return nil
}
// never reach
return nil
}
// Send sends a message on the socket immediately
func (l *link) Send(m *Message) error {
select {
case <-l.closed:
return io.EOF
case l.sendQueue <- m:
}
return nil
}

88
network/network.go
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@ -1,88 +0,0 @@
// Package network is a package for defining a network overlay
package network
import (
"github.com/micro/go-micro/config/options"
"github.com/micro/go-micro/transport"
)
// Network defines a network interface. The network is a single
// shared network between all nodes connected to it. The network
// is responsible for routing messages to the correct services.
type Network interface {
options.Options
// Name of the network
Name() string
// Create returns a new network node id/address
Create() (*Node, error)
// Connect to a node on the network
Connect(*Node) (Conn, error)
// Listen for connections for this node
Listen(*Node) (Listener, error)
}
// Node is a network node represented with id/address and
// metadata which includes the network name, transport, etc
type Node struct {
Id string
Address string
Network string
Metadata map[string]string
}
// A network node listener which can be used to receive messages
type Listener interface {
Address() string
Close() error
Accept() (Conn, error)
}
// A connection from another node on the network
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
}
// The message type sent over the network
type Message struct {
Header map[string]string
Body []byte
}
var (
// The default network name is local
DefaultName = "go.micro"
// just the standard network element
DefaultNetwork = NewNetwork()
)
// NewNetwork returns a new network interface
func NewNetwork(opts ...options.Option) Network {
return newNetwork(opts...)
}
// Name sets the network name
func Name(n string) options.Option {
return options.WithValue("network.name", n)
}
// Address sets the network address
func Address(a string) options.Option {
return options.WithValue("network.address", a)
}
// Transport sets the network transport
func Transport(t transport.Transport) options.Option {
return options.WithValue("network.transport", t)
}