mirror of https://github.com/hashicorp/consul
72 lines
2.2 KiB
Go
72 lines
2.2 KiB
Go
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package hclog
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import (
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"regexp"
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"strings"
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)
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// ExcludeByMessage provides a simple way to build a list of log messages that
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// can be queried and matched. This is meant to be used with the Exclude
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// option on Options to suppress log messages. This does not hold any mutexs
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// within itself, so normal usage would be to Add entries at setup and none after
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// Exclude is going to be called. Exclude is called with a mutex held within
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// the Logger, so that doesn't need to use a mutex. Example usage:
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//
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// f := new(ExcludeByMessage)
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// f.Add("Noisy log message text")
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// appLogger.Exclude = f.Exclude
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type ExcludeByMessage struct {
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messages map[string]struct{}
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}
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// Add a message to be filtered. Do not call this after Exclude is to be called
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// due to concurrency issues.
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func (f *ExcludeByMessage) Add(msg string) {
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if f.messages == nil {
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f.messages = make(map[string]struct{})
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}
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f.messages[msg] = struct{}{}
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}
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// Return true if the given message should be included
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func (f *ExcludeByMessage) Exclude(level Level, msg string, args ...interface{}) bool {
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_, ok := f.messages[msg]
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return ok
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}
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// ExcludeByPrefix is a simple type to match a message string that has a common prefix.
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type ExcludeByPrefix string
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// Matches an message that starts with the prefix.
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func (p ExcludeByPrefix) Exclude(level Level, msg string, args ...interface{}) bool {
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return strings.HasPrefix(msg, string(p))
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}
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// ExcludeByRegexp takes a regexp and uses it to match a log message string. If it matches
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// the log entry is excluded.
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type ExcludeByRegexp struct {
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Regexp *regexp.Regexp
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}
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// Exclude the log message if the message string matches the regexp
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func (e ExcludeByRegexp) Exclude(level Level, msg string, args ...interface{}) bool {
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return e.Regexp.MatchString(msg)
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}
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// ExcludeFuncs is a slice of functions that will called to see if a log entry
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// should be filtered or not. It stops calling functions once at least one returns
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// true.
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type ExcludeFuncs []func(level Level, msg string, args ...interface{}) bool
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// Calls each function until one of them returns true
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func (ff ExcludeFuncs) Exclude(level Level, msg string, args ...interface{}) bool {
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for _, f := range ff {
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if f(level, msg, args...) {
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return true
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}
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}
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return false
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}
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