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/*
*
* Copyright 2016 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Binary metrics_client is a client to retrieve metrics from the server.
package main
import (
"context"
"flag"
"fmt"
"io"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
"google.golang.org/grpc/grpclog"
metricspb "google.golang.org/grpc/stress/grpc_testing"
)
var (
metricsServerAddress = flag.String("metrics_server_address", "", "The metrics server addresses in the format <hostname>:<port>")
totalOnly = flag.Bool("total_only", false, "If true, this prints only the total value of all gauges")
logger = grpclog.Component("stress")
)
func printMetrics(client metricspb.MetricsServiceClient, totalOnly bool) {
stream, err := client.GetAllGauges(context.Background(), &metricspb.EmptyMessage{})
if err != nil {
logger.Fatalf("failed to call GetAllGauges: %v", err)
}
var (
overallQPS int64
rpcStatus error
)
for {
gaugeResponse, err := stream.Recv()
if err != nil {
rpcStatus = err
break
}
if _, ok := gaugeResponse.GetValue().(*metricspb.GaugeResponse_LongValue); !ok {
panic(fmt.Sprintf("gauge %s is not a long value", gaugeResponse.Name))
}
v := gaugeResponse.GetLongValue()
if !totalOnly {
logger.Infof("%s: %d", gaugeResponse.Name, v)
}
overallQPS += v
}
if rpcStatus != io.EOF {
logger.Fatalf("failed to finish server streaming: %v", rpcStatus)
}
logger.Infof("overall qps: %d", overallQPS)
}
func main() {
flag.Parse()
if *metricsServerAddress == "" {
logger.Fatal("-metrics_server_address is unset")
}
conn, err := grpc.Dial(*metricsServerAddress, grpc.WithTransportCredentials(insecure.NewCredentials()))
if err != nil {
logger.Fatalf("cannot connect to metrics server: %v", err)
}
defer conn.Close()
c := metricspb.NewMetricsServiceClient(conn)
printMetrics(c, *totalOnly)
}
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