mirror of
https://github.com/minio/minio.git
synced 2024-12-26 15:15:55 -05:00
51aa59a737
This PR adds a WebSocket grid feature that allows servers to communicate via
a single two-way connection.
There are two request types:
* Single requests, which are `[]byte => ([]byte, error)`. This is for efficient small
roundtrips with small payloads.
* Streaming requests which are `[]byte, chan []byte => chan []byte (and error)`,
which allows for different combinations of full two-way streams with an initial payload.
Only a single stream is created between two machines - and there is, as such, no
server/client relation since both sides can initiate and handle requests. Which server
initiates the request is decided deterministically on the server names.
Requests are made through a mux client and server, which handles message
passing, congestion, cancelation, timeouts, etc.
If a connection is lost, all requests are canceled, and the calling server will try
to reconnect. Registered handlers can operate directly on byte
slices or use a higher-level generics abstraction.
There is no versioning of handlers/clients, and incompatible changes should
be handled by adding new handlers.
The request path can be changed to a new one for any protocol changes.
First, all servers create a "Manager." The manager must know its address
as well as all remote addresses. This will manage all connections.
To get a connection to any remote, ask the manager to provide it given
the remote address using.
```
func (m *Manager) Connection(host string) *Connection
```
All serverside handlers must also be registered on the manager. This will
make sure that all incoming requests are served. The number of in-flight
requests and responses must also be given for streaming requests.
The "Connection" returned manages the mux-clients. Requests issued
to the connection will be sent to the remote.
* `func (c *Connection) Request(ctx context.Context, h HandlerID, req []byte) ([]byte, error)`
performs a single request and returns the result. Any deadline provided on the request is
forwarded to the server, and canceling the context will make the function return at once.
* `func (c *Connection) NewStream(ctx context.Context, h HandlerID, payload []byte) (st *Stream, err error)`
will initiate a remote call and send the initial payload.
```Go
// A Stream is a two-way stream.
// All responses *must* be read by the caller.
// If the call is canceled through the context,
//The appropriate error will be returned.
type Stream struct {
// Responses from the remote server.
// Channel will be closed after an error or when the remote closes.
// All responses *must* be read by the caller until either an error is returned or the channel is closed.
// Canceling the context will cause the context cancellation error to be returned.
Responses <-chan Response
// Requests sent to the server.
// If the handler is defined with 0 incoming capacity this will be nil.
// Channel *must* be closed to signal the end of the stream.
// If the request context is canceled, the stream will no longer process requests.
Requests chan<- []byte
}
type Response struct {
Msg []byte
Err error
}
```
There are generic versions of the server/client handlers that allow the use of type
safe implementations for data types that support msgpack marshal/unmarshal.
124 lines
2.3 KiB
Go
124 lines
2.3 KiB
Go
package cmd
|
|
|
|
// Code generated by github.com/tinylib/msgp DO NOT EDIT.
|
|
|
|
import (
|
|
"bytes"
|
|
"testing"
|
|
|
|
"github.com/tinylib/msgp/msgp"
|
|
)
|
|
|
|
func TestMarshalUnmarshalWalkDirOptions(t *testing.T) {
|
|
v := WalkDirOptions{}
|
|
bts, err := v.MarshalMsg(nil)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
left, err := v.UnmarshalMsg(bts)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if len(left) > 0 {
|
|
t.Errorf("%d bytes left over after UnmarshalMsg(): %q", len(left), left)
|
|
}
|
|
|
|
left, err = msgp.Skip(bts)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if len(left) > 0 {
|
|
t.Errorf("%d bytes left over after Skip(): %q", len(left), left)
|
|
}
|
|
}
|
|
|
|
func BenchmarkMarshalMsgWalkDirOptions(b *testing.B) {
|
|
v := WalkDirOptions{}
|
|
b.ReportAllocs()
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
v.MarshalMsg(nil)
|
|
}
|
|
}
|
|
|
|
func BenchmarkAppendMsgWalkDirOptions(b *testing.B) {
|
|
v := WalkDirOptions{}
|
|
bts := make([]byte, 0, v.Msgsize())
|
|
bts, _ = v.MarshalMsg(bts[0:0])
|
|
b.SetBytes(int64(len(bts)))
|
|
b.ReportAllocs()
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
bts, _ = v.MarshalMsg(bts[0:0])
|
|
}
|
|
}
|
|
|
|
func BenchmarkUnmarshalWalkDirOptions(b *testing.B) {
|
|
v := WalkDirOptions{}
|
|
bts, _ := v.MarshalMsg(nil)
|
|
b.ReportAllocs()
|
|
b.SetBytes(int64(len(bts)))
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
_, err := v.UnmarshalMsg(bts)
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestEncodeDecodeWalkDirOptions(t *testing.T) {
|
|
v := WalkDirOptions{}
|
|
var buf bytes.Buffer
|
|
msgp.Encode(&buf, &v)
|
|
|
|
m := v.Msgsize()
|
|
if buf.Len() > m {
|
|
t.Log("WARNING: TestEncodeDecodeWalkDirOptions Msgsize() is inaccurate")
|
|
}
|
|
|
|
vn := WalkDirOptions{}
|
|
err := msgp.Decode(&buf, &vn)
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
buf.Reset()
|
|
msgp.Encode(&buf, &v)
|
|
err = msgp.NewReader(&buf).Skip()
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
}
|
|
|
|
func BenchmarkEncodeWalkDirOptions(b *testing.B) {
|
|
v := WalkDirOptions{}
|
|
var buf bytes.Buffer
|
|
msgp.Encode(&buf, &v)
|
|
b.SetBytes(int64(buf.Len()))
|
|
en := msgp.NewWriter(msgp.Nowhere)
|
|
b.ReportAllocs()
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
v.EncodeMsg(en)
|
|
}
|
|
en.Flush()
|
|
}
|
|
|
|
func BenchmarkDecodeWalkDirOptions(b *testing.B) {
|
|
v := WalkDirOptions{}
|
|
var buf bytes.Buffer
|
|
msgp.Encode(&buf, &v)
|
|
b.SetBytes(int64(buf.Len()))
|
|
rd := msgp.NewEndlessReader(buf.Bytes(), b)
|
|
dc := msgp.NewReader(rd)
|
|
b.ReportAllocs()
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
err := v.DecodeMsg(dc)
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
}
|
|
}
|