Initial QSfera import
This commit is contained in:
Курнат Андрей
+736
@@ -0,0 +1,736 @@
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package client
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import (
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"context"
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"fmt"
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"sync"
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"sync/atomic"
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"time"
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"github.com/google/uuid"
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"github.com/pkg/errors"
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"go-micro.dev/v4/broker"
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"go-micro.dev/v4/codec"
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raw "go-micro.dev/v4/codec/bytes"
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merrors "go-micro.dev/v4/errors"
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log "go-micro.dev/v4/logger"
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"go-micro.dev/v4/metadata"
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"go-micro.dev/v4/registry"
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"go-micro.dev/v4/selector"
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"go-micro.dev/v4/transport"
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"go-micro.dev/v4/transport/headers"
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"go-micro.dev/v4/util/buf"
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"go-micro.dev/v4/util/net"
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"go-micro.dev/v4/util/pool"
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)
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const (
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packageID = "go.micro.client"
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)
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type rpcClient struct {
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opts Options
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once atomic.Value
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pool pool.Pool
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seq uint64
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mu sync.RWMutex
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}
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func newRPCClient(opt ...Option) Client {
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opts := NewOptions(opt...)
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p := pool.NewPool(
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pool.Size(opts.PoolSize),
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pool.TTL(opts.PoolTTL),
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pool.Transport(opts.Transport),
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)
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rc := &rpcClient{
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opts: opts,
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pool: p,
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seq: 0,
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}
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rc.once.Store(false)
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c := Client(rc)
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// wrap in reverse
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for i := len(opts.Wrappers); i > 0; i-- {
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c = opts.Wrappers[i-1](c)
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}
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return c
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}
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func (r *rpcClient) newCodec(contentType string) (codec.NewCodec, error) {
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if c, ok := r.opts.Codecs[contentType]; ok {
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return c, nil
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}
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if cf, ok := DefaultCodecs[contentType]; ok {
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return cf, nil
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}
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return nil, fmt.Errorf("unsupported Content-Type: %s", contentType)
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}
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func (r *rpcClient) call(
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ctx context.Context,
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node *registry.Node,
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req Request,
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resp interface{},
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opts CallOptions,
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) error {
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address := node.Address
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logger := r.Options().Logger
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msg := &transport.Message{
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Header: make(map[string]string),
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}
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md, ok := metadata.FromContext(ctx)
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if ok {
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for k, v := range md {
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// Don't copy Micro-Topic header, that is used for pub/sub
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// this is fixes the case when the client uses the same context that
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// is received in the subscriber.
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if k == headers.Message {
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continue
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}
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msg.Header[k] = v
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}
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}
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// Set connection timeout for single requests to the server. Should be > 0
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// as otherwise requests can't be made.
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cTimeout := opts.ConnectionTimeout
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if cTimeout == 0 {
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logger.Log(log.DebugLevel, "connection timeout was set to 0, overridng to default connection timeout")
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cTimeout = DefaultConnectionTimeout
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}
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// set timeout in nanoseconds
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msg.Header["Timeout"] = fmt.Sprintf("%d", cTimeout)
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// set the content type for the request
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msg.Header["Content-Type"] = req.ContentType()
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// set the accept header
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msg.Header["Accept"] = req.ContentType()
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// setup old protocol
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reqCodec := setupProtocol(msg, node)
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// no codec specified
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if reqCodec == nil {
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var err error
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reqCodec, err = r.newCodec(req.ContentType())
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if err != nil {
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return merrors.InternalServerError("go.micro.client", err.Error())
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}
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}
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dOpts := []transport.DialOption{
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transport.WithStream(),
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}
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if opts.DialTimeout >= 0 {
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dOpts = append(dOpts, transport.WithTimeout(opts.DialTimeout))
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}
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if opts.ConnClose {
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dOpts = append(dOpts, transport.WithConnClose())
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}
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c, err := r.pool.Get(address, dOpts...)
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if err != nil {
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return merrors.InternalServerError("go.micro.client", "connection error: %v", err)
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}
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seq := atomic.AddUint64(&r.seq, 1) - 1
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codec := newRPCCodec(msg, c, reqCodec, "")
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rsp := &rpcResponse{
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socket: c,
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codec: codec,
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}
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releaseFunc := func(err error) {
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if err = r.pool.Release(c, err); err != nil {
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logger.Log(log.ErrorLevel, "failed to release pool", err)
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}
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}
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stream := &rpcStream{
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id: fmt.Sprintf("%v", seq),
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context: ctx,
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request: req,
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response: rsp,
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codec: codec,
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closed: make(chan bool),
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close: opts.ConnClose,
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release: releaseFunc,
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sendEOS: false,
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}
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// close the stream on exiting this function
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defer func() {
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if err := stream.Close(); err != nil {
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logger.Log(log.ErrorLevel, "failed to close stream", err)
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}
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}()
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// wait for error response
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ch := make(chan error, 1)
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go func() {
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defer func() {
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if r := recover(); r != nil {
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ch <- merrors.InternalServerError("go.micro.client", "panic recovered: %v", r)
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}
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}()
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// send request
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if err := stream.Send(req.Body()); err != nil {
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ch <- err
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return
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}
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// recv response
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if err := stream.Recv(resp); err != nil {
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ch <- err
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return
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}
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// success
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ch <- nil
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}()
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var grr error
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select {
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case err := <-ch:
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return err
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case <-time.After(cTimeout):
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grr = merrors.Timeout("go.micro.client", fmt.Sprintf("%v", ctx.Err()))
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}
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// set the stream error
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if grr != nil {
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stream.Lock()
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stream.err = grr
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stream.Unlock()
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return grr
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}
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return nil
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}
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func (r *rpcClient) stream(ctx context.Context, node *registry.Node, req Request, opts CallOptions) (Stream, error) {
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address := node.Address
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logger := r.Options().Logger
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msg := &transport.Message{
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Header: make(map[string]string),
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}
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md, ok := metadata.FromContext(ctx)
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if ok {
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for k, v := range md {
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msg.Header[k] = v
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}
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}
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// set timeout in nanoseconds
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if opts.StreamTimeout > time.Duration(0) {
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msg.Header["Timeout"] = fmt.Sprintf("%d", opts.StreamTimeout)
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}
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// set the content type for the request
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msg.Header["Content-Type"] = req.ContentType()
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// set the accept header
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msg.Header["Accept"] = req.ContentType()
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// set old codecs
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nCodec := setupProtocol(msg, node)
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// no codec specified
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if nCodec == nil {
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var err error
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nCodec, err = r.newCodec(req.ContentType())
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if err != nil {
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return nil, merrors.InternalServerError("go.micro.client", err.Error())
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}
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}
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dOpts := []transport.DialOption{
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transport.WithStream(),
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}
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if opts.DialTimeout >= 0 {
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dOpts = append(dOpts, transport.WithTimeout(opts.DialTimeout))
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}
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c, err := r.opts.Transport.Dial(address, dOpts...)
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if err != nil {
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return nil, merrors.InternalServerError("go.micro.client", "connection error: %v", err)
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}
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// increment the sequence number
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seq := atomic.AddUint64(&r.seq, 1) - 1
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id := fmt.Sprintf("%v", seq)
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// create codec with stream id
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codec := newRPCCodec(msg, c, nCodec, id)
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rsp := &rpcResponse{
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socket: c,
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codec: codec,
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}
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// set request codec
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if r, ok := req.(*rpcRequest); ok {
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r.codec = codec
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}
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stream := &rpcStream{
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id: id,
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context: ctx,
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request: req,
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response: rsp,
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codec: codec,
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// used to close the stream
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closed: make(chan bool),
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// signal the end of stream,
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sendEOS: true,
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release: func(_ error) {},
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}
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// wait for error response
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ch := make(chan error, 1)
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go func() {
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// send the first message
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ch <- stream.Send(req.Body())
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}()
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var grr error
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select {
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case err := <-ch:
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grr = err
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case <-ctx.Done():
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grr = merrors.Timeout("go.micro.client", fmt.Sprintf("%v", ctx.Err()))
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}
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if grr != nil {
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// set the error
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stream.Lock()
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stream.err = grr
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stream.Unlock()
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// close the stream
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if err := stream.Close(); err != nil {
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logger.Logf(log.ErrorLevel, "failed to close stream: %v", err)
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}
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return nil, grr
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}
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return stream, nil
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}
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func (r *rpcClient) Init(opts ...Option) error {
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r.mu.Lock()
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defer r.mu.Unlock()
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size := r.opts.PoolSize
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ttl := r.opts.PoolTTL
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tr := r.opts.Transport
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for _, o := range opts {
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o(&r.opts)
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}
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// update pool configuration if the options changed
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if size != r.opts.PoolSize || ttl != r.opts.PoolTTL || tr != r.opts.Transport {
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// close existing pool
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if err := r.pool.Close(); err != nil {
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return errors.Wrap(err, "failed to close pool")
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}
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// create new pool
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r.pool = pool.NewPool(
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pool.Size(r.opts.PoolSize),
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pool.TTL(r.opts.PoolTTL),
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pool.Transport(r.opts.Transport),
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)
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}
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return nil
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}
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// Options retrives the options.
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func (r *rpcClient) Options() Options {
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r.mu.RLock()
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defer r.mu.RUnlock()
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return r.opts
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}
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// next returns an iterator for the next nodes to call.
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func (r *rpcClient) next(request Request, opts CallOptions) (selector.Next, error) {
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// try get the proxy
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service, address, _ := net.Proxy(request.Service(), opts.Address)
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// return remote address
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if len(address) > 0 {
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nodes := make([]*registry.Node, len(address))
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for i, addr := range address {
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nodes[i] = ®istry.Node{
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Address: addr,
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// Set the protocol
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Metadata: map[string]string{
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"protocol": "mucp",
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},
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}
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}
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// crude return method
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return func() (*registry.Node, error) {
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return nodes[time.Now().Unix()%int64(len(nodes))], nil
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}, nil
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}
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// get next nodes from the selector
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next, err := r.opts.Selector.Select(service, opts.SelectOptions...)
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if err != nil {
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if errors.Is(err, selector.ErrNotFound) {
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return nil, merrors.InternalServerError("go.micro.client", "service %s: %s", service, err.Error())
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}
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return nil, merrors.InternalServerError("go.micro.client", "error selecting %s node: %s", service, err.Error())
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}
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return next, nil
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}
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func (r *rpcClient) Call(ctx context.Context, request Request, response interface{}, opts ...CallOption) error {
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// TODO: further validate these mutex locks. full lock would prevent
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// parallel calls. Maybe we can set individual locks for secctions.
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r.mu.RLock()
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defer r.mu.RUnlock()
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// make a copy of call opts
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callOpts := r.opts.CallOptions
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for _, opt := range opts {
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opt(&callOpts)
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}
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next, err := r.next(request, callOpts)
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if err != nil {
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return err
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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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// no deadline so we create a new one
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var cancel context.CancelFunc
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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 merrors.Timeout("go.micro.client", fmt.Sprintf("%v", ctx.Err()))
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default:
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}
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// make copy of call method
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rcall := r.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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rcall = callOpts.CallWrappers[i-1](rcall)
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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, request, i)
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if err != nil {
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return merrors.InternalServerError("go.micro.client", "backoff error: %v", 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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|
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// select next node
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node, err := next()
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service := request.Service()
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|
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if err != nil {
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if errors.Is(err, selector.ErrNotFound) {
|
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return merrors.InternalServerError("go.micro.client", "service %s: %s", service, err.Error())
|
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}
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return merrors.InternalServerError("go.micro.client",
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"error getting next %s node: %s",
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service,
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err.Error())
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}
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// make the call
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err = rcall(ctx, node, request, response, callOpts)
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r.opts.Selector.Mark(service, node, err)
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return err
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}
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// get the retries
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retries := callOpts.Retries
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|
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// disable retries when using a proxy
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// Note: I don't see why we should disable retries for proxies, so commenting out.
|
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// if _, _, ok := net.Proxy(request.Service(), callOpts.Address); ok {
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// retries = 0
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// }
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|
||||
ch := make(chan error, retries+1)
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var gerr error
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||||
|
||||
for i := 0; i <= retries; i++ {
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go func(i int) {
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ch <- call(i)
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}(i)
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||||
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select {
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||||
case <-ctx.Done():
|
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return merrors.Timeout("go.micro.client", fmt.Sprintf("call timeout: %v", ctx.Err()))
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||||
case err := <-ch:
|
||||
// if the call succeeded lets bail early
|
||||
if err == nil {
|
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return nil
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||||
}
|
||||
|
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retry, rerr := callOpts.Retry(ctx, request, i, err)
|
||||
if rerr != nil {
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||||
return rerr
|
||||
}
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||||
|
||||
if !retry {
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return err
|
||||
}
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||||
|
||||
r.opts.Logger.Logf(log.DebugLevel, "Retrying request. Previous attempt failed with: %v", err)
|
||||
|
||||
gerr = err
|
||||
}
|
||||
}
|
||||
|
||||
return gerr
|
||||
}
|
||||
|
||||
func (r *rpcClient) Stream(ctx context.Context, request Request, opts ...CallOption) (Stream, error) {
|
||||
r.mu.RLock()
|
||||
defer r.mu.RUnlock()
|
||||
|
||||
// make a copy of call opts
|
||||
callOpts := r.opts.CallOptions
|
||||
for _, opt := range opts {
|
||||
opt(&callOpts)
|
||||
}
|
||||
|
||||
next, err := r.next(request, callOpts)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
select {
|
||||
case <-ctx.Done():
|
||||
return nil, merrors.Timeout("go.micro.client", fmt.Sprintf("%v", ctx.Err()))
|
||||
default:
|
||||
}
|
||||
|
||||
call := func(i int) (Stream, error) {
|
||||
// call backoff first. Someone may want an initial start delay
|
||||
t, err := callOpts.Backoff(ctx, request, i)
|
||||
if err != nil {
|
||||
return nil, merrors.InternalServerError("go.micro.client", "backoff error: %v", err.Error())
|
||||
}
|
||||
|
||||
// only sleep if greater than 0
|
||||
if t.Seconds() > 0 {
|
||||
time.Sleep(t)
|
||||
}
|
||||
|
||||
node, err := next()
|
||||
service := request.Service()
|
||||
|
||||
if err != nil {
|
||||
if errors.Is(err, selector.ErrNotFound) {
|
||||
return nil, merrors.InternalServerError("go.micro.client", "service %s: %s", service, err.Error())
|
||||
}
|
||||
|
||||
return nil, merrors.InternalServerError("go.micro.client",
|
||||
"error getting next %s node: %s",
|
||||
service,
|
||||
err.Error())
|
||||
}
|
||||
|
||||
stream, err := r.stream(ctx, node, request, callOpts)
|
||||
r.opts.Selector.Mark(service, node, err)
|
||||
|
||||
return stream, err
|
||||
}
|
||||
|
||||
type response struct {
|
||||
stream Stream
|
||||
err error
|
||||
}
|
||||
|
||||
// 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)
|
||||
|
||||
var grr error
|
||||
|
||||
for i := 0; i <= retries; i++ {
|
||||
go func(i int) {
|
||||
s, err := call(i)
|
||||
ch <- response{s, err}
|
||||
}(i)
|
||||
|
||||
select {
|
||||
case <-ctx.Done():
|
||||
return nil, merrors.Timeout("go.micro.client", fmt.Sprintf("call timeout: %v", ctx.Err()))
|
||||
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
|
||||
}
|
||||
|
||||
grr = rsp.err
|
||||
}
|
||||
}
|
||||
|
||||
return nil, grr
|
||||
}
|
||||
|
||||
func (r *rpcClient) Publish(ctx context.Context, msg Message, opts ...PublishOption) error {
|
||||
options := PublishOptions{
|
||||
Context: context.Background(),
|
||||
}
|
||||
for _, o := range opts {
|
||||
o(&options)
|
||||
}
|
||||
|
||||
metadata, ok := metadata.FromContext(ctx)
|
||||
if !ok {
|
||||
metadata = make(map[string]string)
|
||||
}
|
||||
|
||||
id := uuid.New().String()
|
||||
metadata["Content-Type"] = msg.ContentType()
|
||||
metadata[headers.Message] = msg.Topic()
|
||||
metadata[headers.ID] = id
|
||||
|
||||
// set the topic
|
||||
topic := msg.Topic()
|
||||
|
||||
// get the exchange
|
||||
if len(options.Exchange) > 0 {
|
||||
topic = options.Exchange
|
||||
}
|
||||
|
||||
// encode message body
|
||||
cf, err := r.newCodec(msg.ContentType())
|
||||
if err != nil {
|
||||
return merrors.InternalServerError(packageID, err.Error())
|
||||
}
|
||||
|
||||
var body []byte
|
||||
|
||||
// passed in raw data
|
||||
if d, ok := msg.Payload().(*raw.Frame); ok {
|
||||
body = d.Data
|
||||
} else {
|
||||
b := buf.New(nil)
|
||||
|
||||
if err = cf(b).Write(&codec.Message{
|
||||
Target: topic,
|
||||
Type: codec.Event,
|
||||
Header: map[string]string{
|
||||
headers.ID: id,
|
||||
headers.Message: msg.Topic(),
|
||||
},
|
||||
}, msg.Payload()); err != nil {
|
||||
return merrors.InternalServerError(packageID, err.Error())
|
||||
}
|
||||
|
||||
// set the body
|
||||
body = b.Bytes()
|
||||
}
|
||||
|
||||
l, ok := r.once.Load().(bool)
|
||||
if !ok {
|
||||
return fmt.Errorf("failed to cast to bool")
|
||||
}
|
||||
|
||||
if !l {
|
||||
if err = r.opts.Broker.Connect(); err != nil {
|
||||
return merrors.InternalServerError(packageID, err.Error())
|
||||
}
|
||||
|
||||
r.once.Store(true)
|
||||
}
|
||||
|
||||
return r.opts.Broker.Publish(topic, &broker.Message{
|
||||
Header: metadata,
|
||||
Body: body,
|
||||
}, broker.PublishContext(options.Context))
|
||||
}
|
||||
|
||||
func (r *rpcClient) NewMessage(topic string, message interface{}, opts ...MessageOption) Message {
|
||||
return newMessage(topic, message, r.opts.ContentType, opts...)
|
||||
}
|
||||
|
||||
func (r *rpcClient) NewRequest(service, method string, request interface{}, reqOpts ...RequestOption) Request {
|
||||
return newRequest(service, method, request, r.opts.ContentType, reqOpts...)
|
||||
}
|
||||
|
||||
func (r *rpcClient) String() string {
|
||||
return "mucp"
|
||||
}
|
||||
Reference in New Issue
Block a user