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callee.go
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callee.go
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package main
import (
"context"
"github.com/dtegapp/nexus/v3/client"
"github.com/dtegapp/nexus/v3/examples/newclient"
"github.com/dtegapp/nexus/v3/wamp"
"log"
"os"
"os/signal"
)
const procedureName = "mirror"
func main() {
logger := log.New(os.Stdout, "CALLEE> ", 0)
// Connect callee client with requested socket type and serialization.
callee, err := newclient.NewClient(logger)
if err != nil {
logger.Fatal(err)
}
defer callee.Close()
// Important node: ctx context.Context here is the context of the whole invocation
// starting with 1st call/invocation and lasts until final result
mirror := func(ctx context.Context, inv *wamp.Invocation) client.InvokeResult {
log.Println("Received and sending back payload data...", inv.Arguments[0])
if isInProgress, _ := inv.Details[wamp.OptProgress].(bool); !isInProgress {
return client.InvokeResult{Args: inv.Arguments}
} else {
senderr := callee.SendProgress(ctx, inv.Arguments, nil)
if senderr != nil {
log.Println("Error sending progress:", senderr)
return client.InvokeResult{Err: "test.failed"}
}
}
return client.InvokeResult{Err: wamp.InternalProgressiveOmitResult}
}
// Register procedure "sum"
if err = callee.Register(procedureName, mirror, nil); err != nil {
logger.Fatal("Failed to register procedure:", err)
}
logger.Println("Registered procedure", procedureName, "with router")
// Wait for CTRL-c or client close while handling remote procedure calls.
sigChan := make(chan os.Signal, 1)
signal.Notify(sigChan, os.Interrupt)
select {
case <-sigChan:
case <-callee.Done():
logger.Print("Router gone, exiting")
return // router gone, just exit
}
if err = callee.Unregister(procedureName); err != nil {
logger.Println("Failed to unregister procedure:", err)
}
}