108 lines
3 KiB
Go
108 lines
3 KiB
Go
// Package results implements a helper that can be used to store the results of
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// a Nagios, Centreon, Icinga... service monitoring plugin, and convert them to
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// text which can be sent to the monitoring server.
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package results // import nocternity.net/gomonop/pkg/results
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import (
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"container/list"
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"fmt"
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"strings"
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"nocternity.net/gomonop/pkg/perfdata"
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"nocternity.net/gomonop/pkg/status"
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)
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// Results represents the monitoring plugin's results, including its name,
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// return status and message, additional lines of text, and performance
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// data to be encoded in the output.
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type Results struct {
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name string
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status status.Status
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message string
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extraText *list.List
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perfData map[string]*perfdata.PerfData
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}
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// New creates the plugin with `name` as its name and an unknown status.
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func New(name string) *Results {
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p := new(Results)
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p.name = name
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p.status = status.StatusUnknown
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p.message = "no status set"
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p.perfData = make(map[string]*perfdata.PerfData)
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return p
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}
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// SetState sets the plugin's output code to `status` and its message to
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// the specified `message`.
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func (p *Results) SetState(status status.Status, message string) {
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p.status = status
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p.message = message
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}
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// AddLine adds the specified string to the extra output text buffer.
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func (p *Results) AddLine(line string) {
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if p.extraText == nil {
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p.extraText = list.New()
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}
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p.extraText.PushBack(line)
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}
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// AddLinef formats the input and adds it to the text buffer.
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func (p *Results) AddLinef(format string, data ...interface{}) {
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p.AddLine(fmt.Sprintf(format, data...))
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}
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// AddLines add the specified `lines` to the output text.
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func (p *Results) AddLines(lines []string) {
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for _, line := range lines {
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p.AddLine(line)
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}
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}
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// AddPerfData adds performance data described by the "pd" argument to the
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// output's performance data. If two performance data records are added for
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// the same label, the program panics.
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func (p *Results) AddPerfData(pd *perfdata.PerfData) {
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_, exists := p.perfData[pd.Label]
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if exists {
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panic("duplicate performance data " + pd.Label)
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}
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p.perfData[pd.Label] = pd
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}
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// String generates the plugin's text output from its name, status, text data
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// and performance data.
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func (p *Results) String() string {
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var strBuilder strings.Builder
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strBuilder.WriteString(p.name)
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strBuilder.WriteString(" ")
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strBuilder.WriteString(p.status.String())
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strBuilder.WriteString(": ")
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strBuilder.WriteString(p.message)
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if len(p.perfData) > 0 {
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strBuilder.WriteString(" | ")
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needSep := false
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for _, data := range p.perfData {
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if needSep {
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strBuilder.WriteString(", ")
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} else {
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needSep = true
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}
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strBuilder.WriteString(data.String())
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}
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}
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if p.extraText != nil {
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for em := p.extraText.Front(); em != nil; em = em.Next() {
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strBuilder.WriteString("\n")
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//nolint:forcetypeassert // we want to panic if this isn't a string
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strBuilder.WriteString(em.Value.(string))
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}
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}
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return strBuilder.String()
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}
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// ExitCode returns the plugin's exit code.
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func (p *Results) ExitCode() int {
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return int(p.status)
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}
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