github.com/uber/kraken@v0.1.4/metrics/m3.go (about)

     1  // Copyright (c) 2016-2019 Uber Technologies, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  package metrics
    15  
    16  import (
    17  	"fmt"
    18  	"io"
    19  	"time"
    20  
    21  	"github.com/uber-go/tally"
    22  	"github.com/uber-go/tally/m3"
    23  )
    24  
    25  func newM3Scope(config Config, cluster string) (tally.Scope, io.Closer, error) {
    26  	if cluster == "" {
    27  		return nil, nil, fmt.Errorf("cluster required for m3")
    28  	}
    29  
    30  	if config.M3.Service == "" {
    31  		return nil, nil, fmt.Errorf("service required for m3")
    32  	}
    33  
    34  	// HostPort is required for m3 metrics but tally/m3 does not fail when HostPort is empty.
    35  	if config.M3.HostPort == "" {
    36  		return nil, nil, fmt.Errorf("host_port required for m3")
    37  	}
    38  
    39  	m3Config := m3.Configuration{
    40  		HostPort: config.M3.HostPort,
    41  		Service:  config.M3.Service,
    42  		Env:      cluster,
    43  	}
    44  	r, err := m3Config.NewReporter()
    45  	if err != nil {
    46  		return nil, nil, err
    47  	}
    48  	s, c := tally.NewRootScope(tally.ScopeOptions{
    49  		CachedReporter: r,
    50  	}, time.Second)
    51  	return s, c, nil
    52  }