micro/client/rpc_client.go

641 lines
14 KiB
Go
Raw Normal View History

2015-01-14 02:31:27 +03:00
package client
import (
2018-03-03 14:53:52 +03:00
"context"
2015-01-14 02:31:27 +03:00
"fmt"
"math/rand"
"sync/atomic"
2019-01-18 15:30:39 +03:00
"time"
2019-01-10 23:35:10 +03:00
"github.com/google/uuid"
"github.com/micro/go-micro/v2/broker"
"github.com/micro/go-micro/v2/codec"
raw "github.com/micro/go-micro/v2/codec/bytes"
"github.com/micro/go-micro/v2/errors"
"github.com/micro/go-micro/v2/metadata"
"github.com/micro/go-micro/v2/router"
"github.com/micro/go-micro/v2/selector"
"github.com/micro/go-micro/v2/transport"
"github.com/micro/go-micro/v2/util/buf"
"github.com/micro/go-micro/v2/util/net"
"github.com/micro/go-micro/v2/util/pool"
2015-01-14 02:31:27 +03:00
)
2015-05-23 19:40:53 +03:00
type rpcClient struct {
once atomic.Value
opts Options
2019-07-28 20:56:18 +03:00
pool pool.Pool
2018-03-21 06:17:38 +03:00
seq uint64
2015-05-21 00:57:19 +03:00
}
2015-01-14 02:31:27 +03:00
2015-05-23 19:40:53 +03:00
func newRpcClient(opt ...Option) Client {
opts := NewOptions(opt...)
2019-07-28 20:56:18 +03:00
p := pool.NewPool(
pool.Size(opts.PoolSize),
pool.TTL(opts.PoolTTL),
pool.Transport(opts.Transport),
)
2015-11-26 23:36:42 +03:00
rc := &rpcClient{
2015-05-23 19:40:53 +03:00
opts: opts,
2019-07-28 20:56:18 +03:00
pool: p,
2018-03-21 06:17:38 +03:00
seq: 0,
2015-05-23 19:40:53 +03:00
}
rc.once.Store(false)
2015-11-26 23:36:42 +03:00
c := Client(rc)
// wrap in reverse
for i := len(opts.Wrappers); i > 0; i-- {
c = opts.Wrappers[i-1](c)
2015-11-26 23:36:42 +03:00
}
return c
2015-05-23 19:40:53 +03:00
}
func (r *rpcClient) newCodec(contentType string) (codec.NewCodec, error) {
if c, ok := r.opts.Codecs[contentType]; ok {
return c, nil
2015-11-25 22:50:05 +03:00
}
if cf, ok := DefaultCodecs[contentType]; ok {
2015-11-25 22:50:05 +03:00
return cf, nil
}
return nil, fmt.Errorf("Unsupported Content-Type: %s", contentType)
}
func (r *rpcClient) lookupRoute(req Request, opts CallOptions) (*router.Route, error) {
// check to see if the proxy has been set, if it has we don't need to lookup the routes; net.Proxy
// returns a slice of addresses, so we'll use a random one. Eventually we should to use the
// selector for this.
service, addresses, _ := net.Proxy(req.Service(), opts.Address)
if len(addresses) > 0 {
return &router.Route{
Service: service,
Address: addresses[rand.Int()%len(addresses)],
}, nil
}
// construct the router query
query := []router.QueryOption{router.QueryService(req.Service())}
// if a custom network was requested, pass this to the router. By default the router will use it's
// own network, which is set during initialisation.
if len(opts.Network) > 0 {
query = append(query, router.QueryNetwork(opts.Network))
}
// use the router passed as a call option, or fallback to the rpc clients router
if opts.Router == nil {
opts.Router = r.opts.Router
}
// lookup the routes which can be used to execute the request
routes, err := opts.Router.Lookup(query...)
if err == router.ErrRouteNotFound {
return nil, errors.InternalServerError("go.micro.client", "service %s: %s", req.Service(), err.Error())
} else if err != nil {
return nil, errors.InternalServerError("go.micro.client", "error getting next %s node: %s", req.Service(), err.Error())
}
// use the selector passed as a call option, or fallback to the rpc clients selector
if opts.Selector == nil {
opts.Selector = r.opts.Selector
}
2019-01-18 15:30:39 +03:00
// select the route to use for the request
if route, err := opts.Selector.Select(routes); err == selector.ErrNoneAvailable {
return nil, errors.InternalServerError("go.micro.client", "service %s: %s", req.Service(), err.Error())
} else if err != nil {
return nil, errors.InternalServerError("go.micro.client", "error getting next %s node: %s", req.Service(), err.Error())
} else {
return route, nil
}
}
func (r *rpcClient) call(ctx context.Context, route *router.Route, req Request, resp interface{}, opts CallOptions) error {
2015-05-21 00:57:19 +03:00
msg := &transport.Message{
Header: make(map[string]string),
}
2015-01-14 02:31:27 +03:00
2016-01-28 20:55:28 +03:00
md, ok := metadata.FromContext(ctx)
2015-05-23 13:53:40 +03:00
if ok {
for k, v := range md {
// don't copy Micro-Topic header, that used for pub/sub
// this fix case then client uses the same context that received in subscriber
if k == "Micro-Topic" {
continue
}
2015-05-23 13:53:40 +03:00
msg.Header[k] = v
2015-05-21 00:57:19 +03:00
}
2015-01-14 02:31:27 +03:00
}
2016-05-13 01:32:58 +03:00
// set timeout in nanoseconds
msg.Header["Timeout"] = fmt.Sprintf("%d", opts.RequestTimeout)
// set the content type for the request
2016-01-06 00:13:20 +03:00
msg.Header["Content-Type"] = req.ContentType()
// set the accept header
msg.Header["Accept"] = req.ContentType()
2015-05-21 00:57:19 +03:00
2019-01-18 15:30:39 +03:00
// setup old protocol
cf := setupProtocol(msg, route)
2019-01-18 15:30:39 +03:00
// no codec specified
if cf == nil {
var err error
cf, err = r.newCodec(req.ContentType())
if err != nil {
return errors.InternalServerError("go.micro.client", err.Error())
}
2015-11-25 22:50:05 +03:00
}
2019-08-31 20:26:48 +03:00
dOpts := []transport.DialOption{
transport.WithStream(),
}
if opts.DialTimeout >= 0 {
dOpts = append(dOpts, transport.WithTimeout(opts.DialTimeout))
}
c, err := r.pool.Get(route.Address, dOpts...)
2015-01-14 02:31:27 +03:00
if err != nil {
2017-06-11 15:02:08 +03:00
return errors.InternalServerError("go.micro.client", "connection error: %v", err)
2015-01-14 02:31:27 +03:00
}
2020-05-19 16:44:46 +03:00
seq := atomic.AddUint64(&r.seq, 1) - 1
2019-08-15 22:08:49 +03:00
codec := newRpcCodec(msg, c, cf, "")
2019-01-15 00:30:43 +03:00
rsp := &rpcResponse{
socket: c,
codec: codec,
}
2018-03-21 06:17:38 +03:00
2016-01-06 00:13:20 +03:00
stream := &rpcStream{
2019-08-16 18:46:29 +03:00
id: fmt.Sprintf("%v", seq),
2019-01-15 00:30:43 +03:00
context: ctx,
request: req,
response: rsp,
codec: codec,
closed: make(chan bool),
2019-08-16 18:46:29 +03:00
release: func(err error) { r.pool.Release(c, err) },
sendEOS: false,
2016-01-06 00:13:20 +03:00
}
2019-08-16 18:46:29 +03:00
// close the stream on exiting this function
2016-05-13 01:32:58 +03:00
defer stream.Close()
2016-01-04 00:14:33 +03:00
2019-08-16 18:46:29 +03:00
// wait for error response
2016-01-04 00:14:33 +03:00
ch := make(chan error, 1)
go func() {
2016-06-30 18:19:02 +03:00
defer func() {
if r := recover(); r != nil {
2017-06-11 15:02:08 +03:00
ch <- errors.InternalServerError("go.micro.client", "panic recovered: %v", r)
2016-06-30 18:19:02 +03:00
}
}()
2016-01-06 00:13:20 +03:00
// send request
2019-01-10 14:39:39 +03:00
if err := stream.Send(req.Body()); err != nil {
2016-01-06 00:13:20 +03:00
ch <- err
return
2016-01-04 00:14:33 +03:00
}
2016-01-06 00:13:20 +03:00
// recv request
if err := stream.Recv(resp); err != nil {
ch <- err
return
}
// success
ch <- nil
2016-01-04 00:14:33 +03:00
}()
2019-08-16 18:46:29 +03:00
var grr error
2016-01-04 00:14:33 +03:00
select {
2016-05-13 01:32:58 +03:00
case err := <-ch:
return err
case <-ctx.Done():
2019-08-16 18:46:29 +03:00
grr = errors.Timeout("go.micro.client", fmt.Sprintf("%v", ctx.Err()))
2015-10-22 17:14:56 +03:00
}
2019-08-16 18:46:29 +03:00
// set the stream error
if grr != nil {
stream.Lock()
stream.err = grr
stream.Unlock()
return grr
}
return nil
}
2015-01-14 02:31:27 +03:00
func (r *rpcClient) stream(ctx context.Context, route *router.Route, req Request, opts CallOptions) (Stream, error) {
msg := &transport.Message{
Header: make(map[string]string),
2015-01-14 02:31:27 +03:00
}
2016-01-28 20:55:28 +03:00
md, ok := metadata.FromContext(ctx)
if ok {
for k, v := range md {
msg.Header[k] = v
}
2015-01-14 02:31:27 +03:00
}
2016-05-13 01:32:58 +03:00
// set timeout in nanoseconds
if opts.StreamTimeout > time.Duration(0) {
msg.Header["Timeout"] = fmt.Sprintf("%d", opts.StreamTimeout)
}
2016-05-13 01:32:58 +03:00
// set the content type for the request
2015-12-17 23:37:35 +03:00
msg.Header["Content-Type"] = req.ContentType()
// set the accept header
msg.Header["Accept"] = req.ContentType()
2015-01-14 02:31:27 +03:00
2019-01-18 15:30:39 +03:00
// set old codecs
cf := setupProtocol(msg, route)
2019-01-18 15:30:39 +03:00
// no codec specified
if cf == nil {
var err error
cf, err = r.newCodec(req.ContentType())
if err != nil {
return nil, errors.InternalServerError("go.micro.client", err.Error())
}
2015-11-25 22:50:05 +03:00
}
2018-07-18 02:32:35 +03:00
dOpts := []transport.DialOption{
transport.WithStream(),
}
if opts.DialTimeout >= 0 {
dOpts = append(dOpts, transport.WithTimeout(opts.DialTimeout))
}
c, err := r.opts.Transport.Dial(route.Address, dOpts...)
2015-01-14 02:31:27 +03:00
if err != nil {
2017-06-11 15:02:08 +03:00
return nil, errors.InternalServerError("go.micro.client", "connection error: %v", err)
2015-01-14 02:31:27 +03:00
}
2019-08-15 22:08:49 +03:00
// increment the sequence number
2020-05-19 16:44:46 +03:00
seq := atomic.AddUint64(&r.seq, 1) - 1
2019-08-15 22:08:49 +03:00
id := fmt.Sprintf("%v", seq)
// create codec with stream id
codec := newRpcCodec(msg, c, cf, id)
2019-01-15 00:30:43 +03:00
rsp := &rpcResponse{
socket: c,
codec: codec,
}
2019-01-30 21:42:11 +03:00
// set request codec
if r, ok := req.(*rpcRequest); ok {
r.codec = codec
}
2015-12-18 04:21:56 +03:00
stream := &rpcStream{
2019-08-16 18:46:29 +03:00
id: id,
2019-01-15 00:30:43 +03:00
context: ctx,
request: req,
response: rsp,
2019-01-30 21:42:11 +03:00
codec: codec,
2019-08-16 18:46:29 +03:00
// used to close the stream
closed: make(chan bool),
2019-08-15 22:08:49 +03:00
// signal the end of stream,
sendEOS: true,
2019-08-16 18:46:29 +03:00
// release func
release: func(err error) { c.Close() },
2015-12-18 04:21:56 +03:00
}
2019-08-16 18:46:29 +03:00
// wait for error response
2016-01-04 00:14:33 +03:00
ch := make(chan error, 1)
go func() {
2019-08-16 18:46:29 +03:00
// send the first message
2019-01-10 14:39:39 +03:00
ch <- stream.Send(req.Body())
2016-01-04 00:14:33 +03:00
}()
2016-05-13 01:32:58 +03:00
var grr error
2016-01-04 00:14:33 +03:00
select {
2016-05-13 01:32:58 +03:00
case err := <-ch:
grr = err
case <-ctx.Done():
2018-11-25 12:41:28 +03:00
grr = errors.Timeout("go.micro.client", fmt.Sprintf("%v", ctx.Err()))
2016-01-04 00:14:33 +03:00
}
2016-05-13 01:32:58 +03:00
if grr != nil {
2019-08-16 18:46:29 +03:00
// set the error
stream.Lock()
stream.err = grr
stream.Unlock()
// close the stream
2016-05-13 01:32:58 +03:00
stream.Close()
return nil, grr
}
return stream, nil
2015-01-14 02:31:27 +03:00
}
2016-01-02 22:12:17 +03:00
func (r *rpcClient) Init(opts ...Option) error {
2016-06-07 02:46:14 +03:00
size := r.opts.PoolSize
ttl := r.opts.PoolTTL
2019-07-28 20:56:18 +03:00
tr := r.opts.Transport
2016-06-07 02:46:14 +03:00
2016-01-02 22:12:17 +03:00
for _, o := range opts {
o(&r.opts)
}
2016-06-07 02:46:14 +03:00
// update pool configuration if the options changed
2019-07-28 20:56:18 +03:00
if size != r.opts.PoolSize || ttl != r.opts.PoolTTL || tr != r.opts.Transport {
// close existing pool
r.pool.Close()
// create new pool
r.pool = pool.NewPool(
pool.Size(r.opts.PoolSize),
pool.TTL(r.opts.PoolTTL),
pool.Transport(r.opts.Transport),
)
2016-06-07 02:46:14 +03:00
}
2016-01-02 22:12:17 +03:00
return nil
}
func (r *rpcClient) Options() Options {
return r.opts
}
2015-12-08 22:25:42 +03:00
func (r *rpcClient) Call(ctx context.Context, request Request, response interface{}, opts ...CallOption) error {
// make a copy of call opts
callOpts := r.opts.CallOptions
2015-12-09 03:02:45 +03:00
for _, opt := range opts {
opt(&callOpts)
2015-12-09 03:02:45 +03:00
}
2016-05-13 01:32:58 +03:00
// check if we already have a deadline
if d, ok := ctx.Deadline(); !ok {
2016-05-13 01:32:58 +03:00
// no deadline so we create a new one
2019-12-03 10:25:58 +03:00
var cancel context.CancelFunc
ctx, cancel = context.WithTimeout(ctx, callOpts.RequestTimeout)
defer cancel()
2016-05-13 01:32:58 +03:00
} else {
// got a deadline so no need to setup context
// but we need to set the timeout we pass along
remaining := d.Sub(time.Now())
WithRequestTimeout(remaining)(&callOpts)
2016-05-13 01:32:58 +03:00
}
2016-01-04 00:14:33 +03:00
// should we noop right here?
select {
case <-ctx.Done():
2018-11-25 12:41:28 +03:00
return errors.Timeout("go.micro.client", fmt.Sprintf("%v", ctx.Err()))
default:
}
// make copy of call method
rcall := r.call
// wrap the call in reverse
for i := len(callOpts.CallWrappers); i > 0; i-- {
rcall = callOpts.CallWrappers[i-1](rcall)
}
2016-05-13 01:32:58 +03:00
// return errors.New("go.micro.client", "request timeout", 408)
call := func(i int) error {
2016-04-05 22:04:37 +03:00
// call backoff first. Someone may want an initial start delay
t, err := callOpts.Backoff(ctx, request, i)
if err != nil {
2018-07-26 11:33:50 +03:00
return errors.InternalServerError("go.micro.client", "backoff error: %v", err.Error())
2016-04-05 22:04:37 +03:00
}
// only sleep if greater than 0
if t.Seconds() > 0 {
time.Sleep(t)
}
// lookup the route to send the request via
route, err := r.lookupRoute(request, callOpts)
if err != nil {
return err
2016-01-03 02:16:15 +03:00
}
2016-05-13 01:32:58 +03:00
// make the call
err = rcall(ctx, route, request, response, callOpts)
// record the result of the call to inform future routing decisions
r.opts.Selector.Record(*route, err)
2016-05-13 01:32:58 +03:00
return err
}
// get the retries
retries := callOpts.Retries
// disable retries when using a proxy
if _, _, ok := net.Proxy(request.Service(), callOpts.Address); ok {
retries = 0
}
ch := make(chan error, retries+1)
2016-05-13 01:32:58 +03:00
var gerr error
2015-01-14 02:31:27 +03:00
for i := 0; i <= retries; i++ {
go func(i int) {
2016-05-13 01:32:58 +03:00
ch <- call(i)
}(i)
2016-05-13 01:32:58 +03:00
select {
case <-ctx.Done():
2018-11-25 12:41:28 +03:00
return errors.Timeout("go.micro.client", fmt.Sprintf("call timeout: %v", ctx.Err()))
2016-05-13 01:32:58 +03:00
case err := <-ch:
// if the call succeeded lets bail early
if err == nil {
return nil
}
retry, rerr := callOpts.Retry(ctx, request, i, err)
if rerr != nil {
return rerr
}
if !retry {
return err
}
2016-05-13 01:32:58 +03:00
gerr = err
2016-01-03 02:16:15 +03:00
}
2015-05-21 21:24:57 +03:00
}
2016-05-13 01:32:58 +03:00
return gerr
2015-01-14 02:31:27 +03:00
}
2018-04-14 20:15:09 +03:00
func (r *rpcClient) Stream(ctx context.Context, request Request, opts ...CallOption) (Stream, error) {
// make a copy of call opts
callOpts := r.opts.CallOptions
2015-12-09 03:02:45 +03:00
for _, opt := range opts {
opt(&callOpts)
2015-12-09 03:02:45 +03:00
}
// should we noop right here?
select {
case <-ctx.Done():
2018-11-25 12:41:28 +03:00
return nil, errors.Timeout("go.micro.client", fmt.Sprintf("%v", ctx.Err()))
default:
}
2018-04-14 20:15:09 +03:00
call := func(i int) (Stream, error) {
2016-04-05 22:04:37 +03:00
// call backoff first. Someone may want an initial start delay
t, err := callOpts.Backoff(ctx, request, i)
if err != nil {
2018-07-26 11:33:50 +03:00
return nil, errors.InternalServerError("go.micro.client", "backoff error: %v", err.Error())
2016-04-05 22:04:37 +03:00
}
// only sleep if greater than 0
if t.Seconds() > 0 {
time.Sleep(t)
}
// lookup the route to send the request via
route, err := r.lookupRoute(request, callOpts)
if err != nil {
return nil, err
2016-01-03 02:16:15 +03:00
}
// perform the call
stream, err := r.stream(ctx, route, request, callOpts)
// record the result of the call to inform future routing decisions
r.opts.Selector.Record(*route, err)
2016-05-13 01:32:58 +03:00
return stream, err
}
type response struct {
2018-04-14 20:15:09 +03:00
stream Stream
2016-05-13 01:32:58 +03:00
err error
}
2016-01-03 02:16:15 +03:00
// get the retries
retries := callOpts.Retries
// disable retries when using a proxy
if _, _, ok := net.Proxy(request.Service(), callOpts.Address); ok {
retries = 0
}
ch := make(chan response, retries+1)
2016-05-13 01:32:58 +03:00
var grr error
for i := 0; i <= retries; i++ {
go func(i int) {
2016-05-13 01:32:58 +03:00
s, err := call(i)
ch <- response{s, err}
}(i)
2016-05-13 01:32:58 +03:00
select {
case <-ctx.Done():
2018-11-25 12:41:28 +03:00
return nil, errors.Timeout("go.micro.client", fmt.Sprintf("call timeout: %v", ctx.Err()))
2016-05-13 01:32:58 +03:00
case rsp := <-ch:
// if the call succeeded lets bail early
if rsp.err == nil {
return rsp.stream, nil
}
retry, rerr := callOpts.Retry(ctx, request, i, rsp.err)
if rerr != nil {
return nil, rerr
}
if !retry {
return nil, rsp.err
}
2016-11-07 19:46:12 +03:00
grr = rsp.err
2016-01-03 02:16:15 +03:00
}
}
2016-05-13 01:32:58 +03:00
return nil, grr
}
2018-04-14 20:06:52 +03:00
func (r *rpcClient) Publish(ctx context.Context, msg Message, opts ...PublishOption) error {
2019-02-23 13:50:53 +03:00
options := PublishOptions{
Context: context.Background(),
}
for _, o := range opts {
o(&options)
}
2016-01-28 20:55:28 +03:00
md, ok := metadata.FromContext(ctx)
if !ok {
md = make(map[string]string)
}
2019-01-10 23:35:10 +03:00
id := uuid.New().String()
2018-04-14 20:06:52 +03:00
md["Content-Type"] = msg.ContentType()
2019-01-24 13:11:02 +03:00
md["Micro-Topic"] = msg.Topic()
md["Micro-Id"] = id
2019-02-23 20:06:17 +03:00
// set the topic
2019-02-23 13:50:53 +03:00
topic := msg.Topic()
2019-02-23 20:06:17 +03:00
// get the exchange
2019-02-23 13:50:53 +03:00
if len(options.Exchange) > 0 {
topic = options.Exchange
}
// encode message body
2018-04-14 20:06:52 +03:00
cf, err := r.newCodec(msg.ContentType())
if err != nil {
return errors.InternalServerError("go.micro.client", err.Error())
}
var body []byte
// passed in raw data
if d, ok := msg.Payload().(*raw.Frame); ok {
body = d.Data
} else {
// new buffer
b := buf.New(nil)
if err := cf(b).Write(&codec.Message{
Target: topic,
Type: codec.Event,
Header: map[string]string{
"Micro-Id": id,
"Micro-Topic": msg.Topic(),
},
}, msg.Payload()); err != nil {
return errors.InternalServerError("go.micro.client", err.Error())
}
// set the body
body = b.Bytes()
}
if !r.once.Load().(bool) {
if err = r.opts.Broker.Connect(); err != nil {
return errors.InternalServerError("go.micro.client", err.Error())
}
r.once.Store(true)
}
2019-02-23 13:50:53 +03:00
return r.opts.Broker.Publish(topic, &broker.Message{
Header: md,
Body: body,
}, broker.PublishContext(options.Context))
}
2018-05-10 19:33:54 +03:00
func (r *rpcClient) NewMessage(topic string, message interface{}, opts ...MessageOption) Message {
return newMessage(topic, message, r.opts.ContentType, opts...)
}
2015-12-17 23:37:35 +03:00
func (r *rpcClient) NewRequest(service, method string, request interface{}, reqOpts ...RequestOption) Request {
2018-04-14 20:06:52 +03:00
return newRequest(service, method, request, r.opts.ContentType, reqOpts...)
2015-01-14 02:31:27 +03:00
}
2015-12-20 00:56:14 +03:00
func (r *rpcClient) String() string {
2019-06-08 21:40:44 +03:00
return "mucp"
2015-12-20 00:56:14 +03:00
}