Update wrapper and examples
This commit is contained in:
parent
c5a08d3159
commit
b1511ed813
@ -56,14 +56,6 @@ type client struct {
|
||||
shutdown bool
|
||||
}
|
||||
|
||||
// A clientCodec implements writing of RPC requests and
|
||||
// reading of RPC responses for the client side of an RPC session.
|
||||
// The client calls WriteRequest to write a request to the connection
|
||||
// and calls ReadResponseHeader and ReadResponseBody in pairs
|
||||
// to read responses. The client calls Close when finished with the
|
||||
// connection. ReadResponseBody may be called with a nil
|
||||
// argument to force the body of the response to be read and then
|
||||
// discarded.
|
||||
type clientCodec interface {
|
||||
WriteRequest(*request, interface{}) error
|
||||
ReadResponseHeader(*response) error
|
||||
@ -224,8 +216,6 @@ func (call *call) done() {
|
||||
}
|
||||
}
|
||||
|
||||
// NewclientWithCodec is like Newclient but uses the specified
|
||||
// codec to encode requests and decode responses.
|
||||
func newClientWithCodec(codec clientCodec) *client {
|
||||
client := &client{
|
||||
codec: codec,
|
||||
|
@ -2,7 +2,6 @@ package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"time"
|
||||
|
||||
"github.com/micro/go-micro/client"
|
||||
"github.com/micro/go-micro/cmd"
|
||||
@ -11,41 +10,6 @@ import (
|
||||
"golang.org/x/net/context"
|
||||
)
|
||||
|
||||
// wrapper example code
|
||||
|
||||
// log wrapper logs every time a request is made
|
||||
type logWrapper struct {
|
||||
client.Client
|
||||
}
|
||||
|
||||
func (l *logWrapper) Call(ctx context.Context, req client.Request, rsp interface{}) error {
|
||||
md, _ := c.GetMetadata(ctx)
|
||||
fmt.Printf("[Log Wrapper] ctx: %v service: %s method: %s\n", md, req.Service(), req.Method())
|
||||
return l.Client.Call(ctx, req, rsp)
|
||||
}
|
||||
|
||||
// trace wrapper attaches a unique trace ID - timestamp
|
||||
type traceWrapper struct {
|
||||
client.Client
|
||||
}
|
||||
|
||||
func (t *traceWrapper) Call(ctx context.Context, req client.Request, rsp interface{}) error {
|
||||
ctx = c.WithMetadata(ctx, map[string]string{
|
||||
"X-Trace-Id": fmt.Sprintf("%d", time.Now().Unix()),
|
||||
})
|
||||
return t.Client.Call(ctx, req, rsp)
|
||||
}
|
||||
|
||||
// Implements client.Wrapper as logWrapper
|
||||
func logWrap(c client.Client) client.Client {
|
||||
return &logWrapper{c}
|
||||
}
|
||||
|
||||
// Implements client.Wrapper as traceWrapper
|
||||
func traceWrap(c client.Client) client.Client {
|
||||
return &traceWrapper{c}
|
||||
}
|
||||
|
||||
// publishes a message
|
||||
func pub() {
|
||||
msg := client.NewPublication("topic.go.micro.srv.example", &example.Message{
|
||||
@ -120,7 +84,6 @@ func stream() {
|
||||
|
||||
func main() {
|
||||
cmd.Init()
|
||||
|
||||
fmt.Println("\n--- Call example ---\n")
|
||||
for i := 0; i < 10; i++ {
|
||||
call(i)
|
||||
@ -131,19 +94,4 @@ func main() {
|
||||
|
||||
fmt.Println("\n--- Publisher example ---\n")
|
||||
pub()
|
||||
|
||||
fmt.Println("\n--- Wrapper example ---\n")
|
||||
|
||||
// Wrap the default client
|
||||
client.DefaultClient = logWrap(client.DefaultClient)
|
||||
|
||||
call(0)
|
||||
|
||||
// Wrap using client.Wrap option
|
||||
client.DefaultClient = client.NewClient(
|
||||
client.Wrap(traceWrap),
|
||||
client.Wrap(logWrap),
|
||||
)
|
||||
|
||||
call(1)
|
||||
}
|
||||
|
91
examples/client/wrapper/wrapper.go
Normal file
91
examples/client/wrapper/wrapper.go
Normal file
@ -0,0 +1,91 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"time"
|
||||
|
||||
"github.com/micro/go-micro/client"
|
||||
"github.com/micro/go-micro/cmd"
|
||||
c "github.com/micro/go-micro/context"
|
||||
example "github.com/micro/go-micro/examples/server/proto/example"
|
||||
"golang.org/x/net/context"
|
||||
)
|
||||
|
||||
// wrapper example code
|
||||
|
||||
// log wrapper logs every time a request is made
|
||||
type logWrapper struct {
|
||||
client.Client
|
||||
}
|
||||
|
||||
func (l *logWrapper) Call(ctx context.Context, req client.Request, rsp interface{}) error {
|
||||
md, _ := c.GetMetadata(ctx)
|
||||
fmt.Printf("[Log Wrapper] ctx: %v service: %s method: %s\n", md, req.Service(), req.Method())
|
||||
return l.Client.Call(ctx, req, rsp)
|
||||
}
|
||||
|
||||
// trace wrapper attaches a unique trace ID - timestamp
|
||||
type traceWrapper struct {
|
||||
client.Client
|
||||
}
|
||||
|
||||
func (t *traceWrapper) Call(ctx context.Context, req client.Request, rsp interface{}) error {
|
||||
ctx = c.WithMetadata(ctx, map[string]string{
|
||||
"X-Trace-Id": fmt.Sprintf("%d", time.Now().Unix()),
|
||||
})
|
||||
return t.Client.Call(ctx, req, rsp)
|
||||
}
|
||||
|
||||
// Implements client.Wrapper as logWrapper
|
||||
func logWrap(c client.Client) client.Client {
|
||||
return &logWrapper{c}
|
||||
}
|
||||
|
||||
// Implements client.Wrapper as traceWrapper
|
||||
func traceWrap(c client.Client) client.Client {
|
||||
return &traceWrapper{c}
|
||||
}
|
||||
|
||||
func call(i int) {
|
||||
// Create new request to service go.micro.srv.example, method Example.Call
|
||||
req := client.NewRequest("go.micro.srv.example", "Example.Call", &example.Request{
|
||||
Name: "John",
|
||||
})
|
||||
|
||||
// create context with metadata
|
||||
ctx := c.WithMetadata(context.Background(), map[string]string{
|
||||
"X-User-Id": "john",
|
||||
"X-From-Id": "script",
|
||||
})
|
||||
|
||||
rsp := &example.Response{}
|
||||
|
||||
// Call service
|
||||
if err := client.Call(ctx, req, rsp); err != nil {
|
||||
fmt.Println("call err: ", err, rsp)
|
||||
return
|
||||
}
|
||||
|
||||
fmt.Println("Call:", i, "rsp:", rsp.Msg)
|
||||
}
|
||||
|
||||
func main() {
|
||||
cmd.Init()
|
||||
|
||||
fmt.Println("\n--- Log Wrapper example ---\n")
|
||||
|
||||
// Wrap the default client
|
||||
client.DefaultClient = logWrap(client.DefaultClient)
|
||||
|
||||
call(0)
|
||||
|
||||
fmt.Println("\n--- Log+Trace Wrapper example ---\n")
|
||||
|
||||
// Wrap using client.Wrap option
|
||||
client.DefaultClient = client.NewClient(
|
||||
client.Wrap(traceWrap),
|
||||
client.Wrap(logWrap),
|
||||
)
|
||||
|
||||
call(1)
|
||||
}
|
@ -6,15 +6,25 @@ import (
|
||||
"github.com/micro/go-micro/examples/server/handler"
|
||||
"github.com/micro/go-micro/examples/server/subscriber"
|
||||
"github.com/micro/go-micro/server"
|
||||
"golang.org/x/net/context"
|
||||
)
|
||||
|
||||
func logWrapper(fn server.HandlerFunc) server.HandlerFunc {
|
||||
return func(ctx context.Context, req interface{}, rsp interface{}) error {
|
||||
log.Infof("[Log Wrapper] Before serving request")
|
||||
err := fn(ctx, req, rsp)
|
||||
log.Infof("[Log Wrapper] After serving request")
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
func main() {
|
||||
// optionally setup command line usage
|
||||
cmd.Init()
|
||||
|
||||
// server.DefaultServer = server.NewServer(
|
||||
// server.Codec("application/bson", bson.Codec),
|
||||
// )
|
||||
server.DefaultServer = server.NewServer(
|
||||
server.WrapHandler(logWrapper),
|
||||
)
|
||||
|
||||
// Initialise Server
|
||||
server.Init(
|
||||
|
@ -18,7 +18,8 @@ type options struct {
|
||||
advertise string
|
||||
id string
|
||||
version string
|
||||
wrappers []Wrapper
|
||||
wrappers []HandlerWrapper
|
||||
subWrappers []SubscriberWrapper
|
||||
}
|
||||
|
||||
func newOptions(opt ...Option) options {
|
||||
@ -156,8 +157,15 @@ func Metadata(md map[string]string) Option {
|
||||
}
|
||||
|
||||
// Adds a handler Wrapper to a list of options passed into the server
|
||||
func Wrap(w Wrapper) Option {
|
||||
func WrapHandler(w HandlerWrapper) Option {
|
||||
return func(o *options) {
|
||||
o.wrappers = append(o.wrappers, w)
|
||||
}
|
||||
}
|
||||
|
||||
// Adds a subscriber Wrapper to a list of options passed into the server
|
||||
func WrapSubscriber(w SubscriberWrapper) Option {
|
||||
return func(o *options) {
|
||||
o.subWrappers = append(o.subWrappers, w)
|
||||
}
|
||||
}
|
||||
|
@ -75,7 +75,7 @@ type server struct {
|
||||
freeReq *request
|
||||
respLock sync.Mutex // protects freeResp
|
||||
freeResp *response
|
||||
wrappers []Wrapper
|
||||
wrappers []HandlerWrapper
|
||||
}
|
||||
|
||||
// Is this an exported - upper case - name?
|
||||
@ -465,13 +465,6 @@ func (server *server) readRequestHeader(codec serverCodec) (service *service, mt
|
||||
return
|
||||
}
|
||||
|
||||
// A serverCodec implements reading of RPC requests and writing of
|
||||
// RPC responses for the server side of an RPC session.
|
||||
// The server calls ReadRequestHeader and ReadRequestBody in pairs
|
||||
// to read requests from the connection, and it calls WriteResponse to
|
||||
// write a response back. The server calls Close when finished with the
|
||||
// connection. ReadRequestBody may be called with a nil
|
||||
// argument to force the body of the request to be read and discarded.
|
||||
type serverCodec interface {
|
||||
ReadRequestHeader(*request) error
|
||||
ReadRequestBody(interface{}) error
|
||||
|
@ -6,4 +6,8 @@ import (
|
||||
|
||||
type HandlerFunc func(ctx context.Context, req interface{}, rsp interface{}) error
|
||||
|
||||
type Wrapper func(HandlerFunc) HandlerFunc
|
||||
type SubscriberFunc func(ctx context.Context, msg interface{}) error
|
||||
|
||||
type HandlerWrapper func(HandlerFunc) HandlerFunc
|
||||
|
||||
type SubscriberWrapper func(SubscriberFunc) SubscriberFunc
|
||||
|
Loading…
Reference in New Issue
Block a user