gitee.com/ks-custle/core-gm@v0.0.0-20230922171213-b83bdd97b62c/grpc/profiling/cmd/remote.go (about)

     1  /*
     2   *
     3   * Copyright 2019 gRPC authors.
     4   *
     5   * Licensed under the Apache License, Version 2.0 (the "License");
     6   * you may not use this file except in compliance with the License.
     7   * You may obtain a copy of the License at
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   *
    17   */
    18  
    19  package main
    20  
    21  import (
    22  	"context"
    23  	"encoding/gob"
    24  	"fmt"
    25  	"os"
    26  	"time"
    27  
    28  	grpc "gitee.com/ks-custle/core-gm/grpc"
    29  	ppb "gitee.com/ks-custle/core-gm/grpc/profiling/proto"
    30  )
    31  
    32  func setEnabled(ctx context.Context, c ppb.ProfilingClient, enabled bool) error {
    33  	_, err := c.Enable(ctx, &ppb.EnableRequest{Enabled: enabled})
    34  	if err != nil {
    35  		logger.Infof("error calling Enable: %v\n", err)
    36  		return err
    37  	}
    38  
    39  	logger.Infof("successfully set enabled = %v", enabled)
    40  	return nil
    41  }
    42  
    43  func retrieveSnapshot(ctx context.Context, c ppb.ProfilingClient, f string) error {
    44  	logger.Infof("getting stream stats")
    45  	resp, err := c.GetStreamStats(ctx, &ppb.GetStreamStatsRequest{})
    46  	if err != nil {
    47  		logger.Errorf("error calling GetStreamStats: %v\n", err)
    48  		return err
    49  	}
    50  	s := &snapshot{StreamStats: resp.StreamStats}
    51  
    52  	logger.Infof("creating snapshot file %s", f)
    53  	file, err := os.Create(f)
    54  	if err != nil {
    55  		logger.Errorf("cannot create %s: %v", f, err)
    56  		return err
    57  	}
    58  	defer file.Close()
    59  
    60  	logger.Infof("encoding data and writing to snapshot file %s", f)
    61  	encoder := gob.NewEncoder(file)
    62  	err = encoder.Encode(s)
    63  	if err != nil {
    64  		logger.Infof("error encoding: %v", err)
    65  		return err
    66  	}
    67  
    68  	logger.Infof("successfully wrote profiling snapshot to %s", f)
    69  	return nil
    70  }
    71  
    72  func remoteCommand() error {
    73  	ctx := context.Background()
    74  	if *flagTimeout > 0 {
    75  		var cancel func()
    76  		ctx, cancel = context.WithTimeout(context.Background(), time.Duration(*flagTimeout)*time.Second)
    77  		defer cancel()
    78  	}
    79  
    80  	logger.Infof("dialing %s", *flagAddress)
    81  	cc, err := grpc.Dial(*flagAddress, grpc.WithInsecure())
    82  	if err != nil {
    83  		logger.Errorf("cannot dial %s: %v", *flagAddress, err)
    84  		return err
    85  	}
    86  	defer cc.Close()
    87  
    88  	c := ppb.NewProfilingClient(cc)
    89  
    90  	if *flagEnableProfiling || *flagDisableProfiling {
    91  		return setEnabled(ctx, c, *flagEnableProfiling)
    92  	} else if *flagRetrieveSnapshot {
    93  		return retrieveSnapshot(ctx, c, *flagSnapshot)
    94  	} else {
    95  		return fmt.Errorf("what should I do with the remote target?")
    96  	}
    97  }