mirror of
https://github.com/yunionio/cloudpods.git
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85 lines
2.3 KiB
Go
85 lines
2.3 KiB
Go
// Copyright 2019 Yunion
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package alerting
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import (
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"strconv"
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"strings"
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"time"
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)
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// DefaultEvalHandler is responsible for evaluating the alert rule.
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type DefaultEvalHandler struct {
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alertJobTimeout time.Duration
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}
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// NewEvalHandler is the `DefaultEvalHandler` constructor.
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func NewEvalHandler() *DefaultEvalHandler {
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return &DefaultEvalHandler{
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alertJobTimeout: time.Second * 5,
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}
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}
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// Eval evaluated the alert rule.
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func (e *DefaultEvalHandler) Eval(context *EvalContext) {
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firing := true
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noDataFound := true
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conditionEvals := ""
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for i := 0; i < len(context.Rule.Conditions); i++ {
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condition := context.Rule.Conditions[i]
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cr, err := condition.Eval(context)
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if err != nil {
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context.Error = err
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}
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// break if condition could not be evaluated
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if context.Error != nil {
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break
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}
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if i == 0 {
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firing = cr.Firing
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noDataFound = cr.NoDataFound
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}
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// calculating Firing based on operator
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if cr.Operator == "or" {
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firing = firing || cr.Firing
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noDataFound = noDataFound || cr.NoDataFound
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} else {
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firing = firing && cr.Firing
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noDataFound = noDataFound && cr.NoDataFound
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}
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if i > 0 {
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conditionEvals = "[" + conditionEvals + " " + strings.ToUpper(cr.Operator) + " " + strconv.FormatBool(cr.Firing) + "]"
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} else {
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conditionEvals = strconv.FormatBool(firing)
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}
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context.EvalMatches = append(context.EvalMatches, cr.EvalMatches...)
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context.AlertOkEvalMatches = append(context.AlertOkEvalMatches, cr.AlertOkEvalMatches...)
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}
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context.ConditionEvals = conditionEvals + " = " + strconv.FormatBool(firing)
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context.Firing = firing
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context.NoDataFound = noDataFound
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context.EndTime = time.Now()
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// elapsedTime := ctx.EndTime.Sub(ctx.StartTime).Nanoseconds() / int64(time.Millisecond)
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// metrics.MAlertingExecutionTime.Observe(float64(elapsedTime))
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}
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