vitess.io/vitess@v0.16.2/go/vt/vtorc/metrics/metrics.go (about)

     1  /*
     2     Copyright 2014 Outbrain Inc.
     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 metrics
    18  
    19  import (
    20  	"time"
    21  
    22  	"vitess.io/vitess/go/vt/vtorc/config"
    23  )
    24  
    25  var matricTickCallbacks [](func())
    26  
    27  // InitMetrics is called once in the lifetime of the app, after config has been loaded
    28  func InitMetrics() error {
    29  	go func() {
    30  		metricsCallbackTick := time.Tick(time.Duration(config.DebugMetricsIntervalSeconds) * time.Second)
    31  		for range metricsCallbackTick {
    32  			for _, f := range matricTickCallbacks {
    33  				go f()
    34  			}
    35  		}
    36  	}()
    37  
    38  	return nil
    39  }
    40  
    41  func OnMetricsTick(f func()) {
    42  	matricTickCallbacks = append(matricTickCallbacks, f)
    43  }