/
filter.go
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/
filter.go
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package prometheus
// Copyright (c) 2018 Bhojpur Consulting Private Limited, India. All rights reserved.
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
import (
"context"
"strconv"
"strings"
"time"
"github.com/prometheus/client_golang/prometheus"
"github.com/bhojpur/web/pkg/client/orm"
)
// FilterChainBuilder is an extension point,
// when we want to support some configuration,
// please use this structure
// this Filter's behavior looks a little bit strange
// for example:
// if we want to records the metrics of QuerySetter
// actually we only records metrics of invoking "QueryTable" and "QueryTableWithCtx"
type FilterChainBuilder struct {
summaryVec prometheus.ObserverVec
AppName string
ServerName string
RunMode string
}
func (builder *FilterChainBuilder) FilterChain(next orm.Filter) orm.Filter {
builder.summaryVec = prometheus.NewSummaryVec(prometheus.SummaryOpts{
Name: "bhojpur",
Subsystem: "orm_operation",
ConstLabels: map[string]string{
"server": builder.ServerName,
"env": builder.RunMode,
"appname": builder.AppName,
},
Help: "The statics info for orm operation",
}, []string{"method", "name", "duration", "insideTx", "txName"})
return func(ctx context.Context, inv *orm.Invocation) []interface{} {
startTime := time.Now()
res := next(ctx, inv)
endTime := time.Now()
dur := (endTime.Sub(startTime)) / time.Millisecond
// if the TPS is too large, here may be some problem
// thinking about using goroutine pool
go builder.report(ctx, inv, dur)
return res
}
}
func (builder *FilterChainBuilder) report(ctx context.Context, inv *orm.Invocation, dur time.Duration) {
// start a transaction, we don't record it
if strings.HasPrefix(inv.Method, "Begin") {
return
}
if inv.Method == "Commit" || inv.Method == "Rollback" {
builder.reportTxn(ctx, inv)
return
}
builder.summaryVec.WithLabelValues(inv.Method, inv.GetTableName(), strconv.Itoa(int(dur)),
strconv.FormatBool(inv.InsideTx), inv.TxName)
}
func (builder *FilterChainBuilder) reportTxn(ctx context.Context, inv *orm.Invocation) {
dur := time.Now().Sub(inv.TxStartTime) / time.Millisecond
builder.summaryVec.WithLabelValues(inv.Method, inv.TxName, strconv.Itoa(int(dur)),
strconv.FormatBool(inv.InsideTx), inv.TxName)
}