120 lines
3.2 KiB
Go
120 lines
3.2 KiB
Go
/*
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© Copyright IBM Corporation 2018
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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// Package metrics contains code to provide metrics for the queue manager
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package metrics
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import (
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"strings"
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"time"
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"github.com/ibm-messaging/mq-container/internal/logger"
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"github.com/ibm-messaging/mq-golang/mqmetric"
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)
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const (
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qmgrLabelValue = mqmetric.QMgrMapKey
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requestTimeout = 10
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)
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var (
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requestChannel = make(chan bool)
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responseChannel = make(chan map[string]*metricData)
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)
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type metricData struct {
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name string
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description string
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objectType bool
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values map[string]float64
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}
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// processMetrics processes publications of metric data and handles describe/collect requests
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func processMetrics(log *logger.Logger) {
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// Initialise metrics
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metrics := initialiseMetrics()
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for {
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// Process publications of metric data
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mqmetric.ProcessPublications()
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// Handle describe/collect requests
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select {
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case collect := <-requestChannel:
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if collect {
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updateMetrics(metrics)
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}
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responseChannel <- metrics
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case <-time.After(requestTimeout * time.Second):
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log.Debugf("Metrics: No requests received within timeout period (%d seconds)", requestTimeout)
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}
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}
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}
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// initialiseMetrics sets initial details for all available metrics
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func initialiseMetrics() map[string]*metricData {
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metrics := make(map[string]*metricData)
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for _, metricClass := range mqmetric.Metrics.Classes {
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for _, metricType := range metricClass.Types {
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if !strings.Contains(metricType.ObjectTopic, "%s") {
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for _, metricElement := range metricType.Elements {
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metric := metricData{
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name: metricElement.MetricName,
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description: metricElement.Description,
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}
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key := makeKey(metricElement)
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metrics[key] = &metric
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}
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}
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}
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}
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return metrics
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}
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// updateMetrics updates values for all available metrics
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func updateMetrics(metrics map[string]*metricData) {
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for _, metricClass := range mqmetric.Metrics.Classes {
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for _, metricType := range metricClass.Types {
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if !strings.Contains(metricType.ObjectTopic, "%s") {
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for _, metricElement := range metricType.Elements {
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// Clear existing metric values
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metric := metrics[makeKey(metricElement)]
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metric.values = make(map[string]float64)
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// Update metric with cached values of publication data
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for label, value := range metricElement.Values {
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normalisedValue := mqmetric.Normalise(metricElement, label, value)
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metric.values[label] = normalisedValue
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}
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// Reset cached values of publication data for this metric
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metricElement.Values = make(map[string]int64)
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}
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}
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}
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}
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}
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// makeKey builds a unique key for each metric
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func makeKey(metricElement *mqmetric.MonElement) string {
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return metricElement.Parent.Parent.Name + "/" + metricElement.Parent.Name + "/" + metricElement.MetricName
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}
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