client: implement Call and Stream methods for noop
Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
This commit is contained in:
parent
b871f64ba6
commit
46da092899
262
client/noop.go
262
client/noop.go
@ -2,6 +2,8 @@ package client
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import (
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"context"
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"fmt"
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"time"
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"go.unistack.org/micro/v3/broker"
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"go.unistack.org/micro/v3/codec"
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@ -181,6 +183,133 @@ func (n *noopClient) String() string {
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}
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func (n *noopClient) Call(ctx context.Context, req Request, rsp interface{}, opts ...CallOption) error {
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// make a copy of call opts
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callOpts := n.opts.CallOptions
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for _, opt := range opts {
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opt(&callOpts)
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}
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// check if we already have a deadline
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d, ok := ctx.Deadline()
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if !ok {
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var cancel context.CancelFunc
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// no deadline so we create a new one
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ctx, cancel = context.WithTimeout(ctx, callOpts.RequestTimeout)
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defer cancel()
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} else {
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// got a deadline so no need to setup context
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// but we need to set the timeout we pass along
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opt := WithRequestTimeout(time.Until(d))
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opt(&callOpts)
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}
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// should we noop right here?
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select {
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case <-ctx.Done():
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return errors.New("go.micro.client", fmt.Sprintf("%v", ctx.Err()), 408)
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default:
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}
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// make copy of call method
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hcall := n.call
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// wrap the call in reverse
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for i := len(callOpts.CallWrappers); i > 0; i-- {
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hcall = callOpts.CallWrappers[i-1](hcall)
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}
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// use the router passed as a call option, or fallback to the rpc clients router
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if callOpts.Router == nil {
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callOpts.Router = n.opts.Router
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}
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if callOpts.Selector == nil {
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callOpts.Selector = n.opts.Selector
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}
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// inject proxy address
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// TODO: don't even bother using Lookup/Select in this case
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if len(n.opts.Proxy) > 0 {
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callOpts.Address = []string{n.opts.Proxy}
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}
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// lookup the route to send the reques to
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// TODO apply any filtering here
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routes, err := n.opts.Lookup(ctx, req, callOpts)
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if err != nil {
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return errors.InternalServerError("go.micro.client", err.Error())
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}
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// balance the list of nodes
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next, err := callOpts.Selector.Select(routes)
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if err != nil {
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return err
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}
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// return errors.New("go.micro.client", "request timeout", 408)
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call := func(i int) error {
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// call backoff first. Someone may want an initial start delay
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t, err := callOpts.Backoff(ctx, req, i)
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if err != nil {
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return errors.InternalServerError("go.micro.client", err.Error())
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}
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// only sleep if greater than 0
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if t.Seconds() > 0 {
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time.Sleep(t)
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}
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node := next()
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// make the call
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err = hcall(ctx, node, req, rsp, callOpts)
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// record the result of the call to inform future routing decisions
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if verr := n.opts.Selector.Record(node, err); verr != nil {
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return verr
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}
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// try and transform the error to a go-micro error
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if verr, ok := err.(*errors.Error); ok {
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return verr
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}
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return err
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}
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ch := make(chan error, callOpts.Retries)
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var gerr error
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for i := 0; i <= callOpts.Retries; i++ {
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go func() {
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ch <- call(i)
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}()
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select {
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case <-ctx.Done():
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return errors.New("go.micro.client", fmt.Sprintf("%v", ctx.Err()), 408)
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case err := <-ch:
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// if the call succeeded lets bail early
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if err == nil {
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return nil
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}
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retry, rerr := callOpts.Retry(ctx, req, i, err)
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if rerr != nil {
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return rerr
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}
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if !retry {
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return err
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}
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gerr = err
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}
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}
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return gerr
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}
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func (n *noopClient) call(ctx context.Context, addr string, req Request, rsp interface{}, opts CallOptions) error {
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return nil
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}
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@ -194,6 +323,139 @@ func (n *noopClient) NewMessage(topic string, msg interface{}, opts ...MessageOp
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}
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func (n *noopClient) Stream(ctx context.Context, req Request, opts ...CallOption) (Stream, error) {
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// make a copy of call opts
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callOpts := n.opts.CallOptions
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for _, o := range opts {
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o(&callOpts)
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}
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// check if we already have a deadline
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d, ok := ctx.Deadline()
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if !ok && callOpts.StreamTimeout > time.Duration(0) {
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var cancel context.CancelFunc
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// no deadline so we create a new one
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ctx, cancel = context.WithTimeout(ctx, callOpts.StreamTimeout)
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defer cancel()
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} else {
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// got a deadline so no need to setup context
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// but we need to set the timeout we pass along
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o := WithStreamTimeout(time.Until(d))
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o(&callOpts)
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}
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// should we noop right here?
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select {
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case <-ctx.Done():
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return nil, errors.New("go.micro.client", fmt.Sprintf("%v", ctx.Err()), 408)
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default:
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}
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/*
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// make copy of call method
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hstream := h.stream
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// wrap the call in reverse
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for i := len(callOpts.CallWrappers); i > 0; i-- {
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hstream = callOpts.CallWrappers[i-1](hstream)
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}
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*/
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// use the router passed as a call option, or fallback to the rpc clients router
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if callOpts.Router == nil {
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callOpts.Router = n.opts.Router
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}
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if callOpts.Selector == nil {
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callOpts.Selector = n.opts.Selector
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}
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// inject proxy address
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// TODO: don't even bother using Lookup/Select in this case
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if len(n.opts.Proxy) > 0 {
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callOpts.Address = []string{n.opts.Proxy}
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}
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// lookup the route to send the reques to
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// TODO apply any filtering here
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routes, err := n.opts.Lookup(ctx, req, callOpts)
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if err != nil {
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return nil, errors.InternalServerError("go.micro.client", err.Error())
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}
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// balance the list of nodes
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next, err := callOpts.Selector.Select(routes)
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if err != nil {
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return nil, err
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}
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call := func(i int) (Stream, error) {
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// call backoff first. Someone may want an initial start delay
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t, cerr := callOpts.Backoff(ctx, req, i)
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if cerr != nil {
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return nil, errors.InternalServerError("go.micro.client", cerr.Error())
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}
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// only sleep if greater than 0
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if t.Seconds() > 0 {
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time.Sleep(t)
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}
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node := next()
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stream, cerr := n.stream(ctx, node, req, callOpts)
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// record the result of the call to inform future routing decisions
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if verr := n.opts.Selector.Record(node, cerr); verr != nil {
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return nil, verr
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}
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// try and transform the error to a go-micro error
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if verr, ok := cerr.(*errors.Error); ok {
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return nil, verr
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}
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return stream, cerr
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}
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type response struct {
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stream Stream
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err error
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}
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ch := make(chan response, callOpts.Retries)
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var grr error
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for i := 0; i <= callOpts.Retries; i++ {
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go func() {
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s, cerr := call(i)
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ch <- response{s, cerr}
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}()
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select {
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case <-ctx.Done():
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return nil, errors.New("go.micro.client", fmt.Sprintf("%v", ctx.Err()), 408)
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case rsp := <-ch:
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// if the call succeeded lets bail early
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if rsp.err == nil {
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return rsp.stream, nil
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}
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retry, rerr := callOpts.Retry(ctx, req, i, err)
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if rerr != nil {
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return nil, rerr
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}
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if !retry {
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return nil, rsp.err
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}
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grr = rsp.err
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}
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}
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return nil, grr
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}
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func (n *noopClient) stream(ctx context.Context, addr string, req Request, opts CallOptions) (Stream, error) {
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return &noopStream{}, nil
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}
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