Adds Statuser implementation

proximo/internal/proximoc/client.go

@@ -108,7 +108,7 @@ func consumeContext(ctx context.Context, proximoAddress string, consumer string,
 		case err := <-errs:
 			return err
 		case <-localCtx.Done():
-			return nil //ctx.Err()
+			return nil // ctx.Err()
 		}
 
 	}
@@ -197,7 +197,7 @@ func (p *ProducerConn) Close() error {
 
 func (p *ProducerConn) start() error {
 
-	//	defer p.stream.CloseSend()
+	// 	defer p.stream.CloseSend()
 
 	confirmations := make(chan *Confirmation, 16) // TODO: make buffer size configurable?
 
@@ -284,3 +284,8 @@ func makeId() string {
 	}
 	return base64.URLEncoding.EncodeToString(random)
 }
+
+// GRPCClient returns grpc client connection
+func (p *ProducerConn) GRPCClient() *grpc.ClientConn {
+	return p.cc
+}

proximo/proximo_sink.go

@@ -66,5 +66,5 @@ func (mq *messageSink) Close() error {
 
 // Status reports the status of the message sink
 func (mq *messageSink) Status() (*pubsub.Status, error) {
-	return nil, errors.New("status is not implemented")
+	return sinkStatus(mq.producer.GrpcClient())
 }

proximo/status.go

@@ -0,0 +1,43 @@
+package proximo
+
+import (
+	"errors"
+
+	"github.com/utilitywarehouse/go-pubsub"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/connectivity"
+)
+
+// ErrNotConnected is returned if a status is requested before the connection has been initialized
+var ErrNotConnected = errors.New("proximo not connected")
+
+func sinkStatus(cc *grpc.ClientConn) (*pubsub.Status, error) {
+	if cc == nil {
+		return nil, ErrNotConnected
+	}
+
+	var (
+		working  bool
+		problems []string
+	)
+	switch cc.GetState() {
+	case connectivity.Ready,
+		connectivity.Idle:
+		working = true
+	case connectivity.Shutdown,
+		connectivity.TransientFailure:
+		working = false
+		problems = append(problems, cc.GetState().String())
+	case connectivity.Connecting:
+		working = true
+		problems = append(problems, cc.GetState().String())
+	default:
+		working = false
+		problems = append(problems, "unknown connectivity state")
+	}
+
+	return &pubsub.Status{
+		Problems: problems,
+		Working:  working,
+	}, nil
+}