github.com/vmware/govmomi@v0.37.1/govc/metric/performance.go (about)

     1  /*
     2  Copyright (c) 2017 VMware, Inc. All Rights Reserved.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package metric
    18  
    19  import (
    20  	"context"
    21  	"flag"
    22  	"fmt"
    23  	"strconv"
    24  
    25  	"github.com/vmware/govmomi/govc/flags"
    26  	"github.com/vmware/govmomi/performance"
    27  )
    28  
    29  type PerformanceFlag struct {
    30  	*flags.DatacenterFlag
    31  	*flags.OutputFlag
    32  
    33  	m *performance.Manager
    34  
    35  	interval string
    36  }
    37  
    38  func NewPerformanceFlag(ctx context.Context) (*PerformanceFlag, context.Context) {
    39  	f := &PerformanceFlag{}
    40  	f.DatacenterFlag, ctx = flags.NewDatacenterFlag(ctx)
    41  	f.OutputFlag, ctx = flags.NewOutputFlag(ctx)
    42  	return f, ctx
    43  }
    44  
    45  func (f *PerformanceFlag) Register(ctx context.Context, fs *flag.FlagSet) {
    46  	f.DatacenterFlag.Register(ctx, fs)
    47  	f.OutputFlag.Register(ctx, fs)
    48  
    49  	fs.StringVar(&f.interval, "i", "real", "Interval ID (real|day|week|month|year)")
    50  }
    51  
    52  func (f *PerformanceFlag) Process(ctx context.Context) error {
    53  	if err := f.DatacenterFlag.Process(ctx); err != nil {
    54  		return err
    55  	}
    56  	if err := f.OutputFlag.Process(ctx); err != nil {
    57  		return err
    58  	}
    59  
    60  	return nil
    61  }
    62  
    63  func (f *PerformanceFlag) Manager(ctx context.Context) (*performance.Manager, error) {
    64  	if f.m != nil {
    65  		return f.m, nil
    66  	}
    67  
    68  	c, err := f.Client()
    69  	if err != nil {
    70  		return nil, err
    71  	}
    72  
    73  	f.m = performance.NewManager(c)
    74  
    75  	f.m.Sort = true
    76  
    77  	return f.m, err
    78  }
    79  
    80  func (f *PerformanceFlag) Interval(val int32) int32 {
    81  	var interval int32
    82  
    83  	if f.interval != "" {
    84  		if i, ok := performance.Intervals[f.interval]; ok {
    85  			interval = i
    86  		} else {
    87  			n, err := strconv.ParseUint(f.interval, 10, 32)
    88  			if err != nil {
    89  				panic(err)
    90  			}
    91  			interval = int32(n)
    92  		}
    93  	}
    94  
    95  	if interval == 0 {
    96  		if val == -1 {
    97  			// realtime not supported
    98  			return 300
    99  		}
   100  
   101  		return val
   102  	}
   103  
   104  	return interval
   105  }
   106  
   107  func (f *PerformanceFlag) ErrNotFound(name string) error {
   108  	return fmt.Errorf("counter %q not found", name)
   109  }