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Add example of client call func wrap

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This commit is contained in:
Asim 2016-11-07 20:11:58 +00:00
parent 2df46131eb
commit c277a3ecc0
1 changed files with 18 additions and 0 deletions
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18
examples/client/wrapper/wrapper.go
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@ -46,6 +46,15 @@ func traceWrap(c client.Client) client.Client {
return &traceWrapper{c} return &traceWrapper{c}
} }
func metricsWrap(cf client.CallFunc) client.CallFunc {
return func(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
t := time.Now()
err := cf(ctx, addr, req, rsp, opts)
fmt.Printf("[Metrics Wrapper] called: %s %s.%s duration: %v\n", addr, req.Service(), req.Method(), time.Since(t))
return err
}
}
func call(i int) { func call(i int) {
// Create new request to service go.micro.srv.example, method Example.Call // Create new request to service go.micro.srv.example, method Example.Call
req := client.NewRequest("go.micro.srv.example", "Example.Call", &example.Request{ req := client.NewRequest("go.micro.srv.example", "Example.Call", &example.Request{
@ -88,4 +97,13 @@ func main() {
) )
call(1) call(1)
fmt.Println("\n--- Metrics Wrapper example ---\n")
// Wrap using client.Wrap option
client.DefaultClient = client.NewClient(
client.WrapCall(metricsWrap),
)
call(2)
} }