brent s
39e0a1fd43
Adding more Event Log support, and modifying the loggers so they return errors in their operational functions.
103 lines
2.9 KiB
Go
103 lines
2.9 KiB
Go
package logging
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import (
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`github.com/google/uuid`
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)
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/*
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AddDefaultLogger adds a default Logger (as would be determined by GetLogger) to a MultiLogger.
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identifier is a string to use to identify the added Logger in MultiLogger.Loggers.
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If empty, one will be automatically generated.
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A pointer to a WinEventID struct may be specified for eventIDs to map extended logging levels (as Windows only supports three levels natively).
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If it is nil, a default one (DefaultEventID) will be used.
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logPaths is an (optional) list of strings to use as paths to test for writing. If the file can be created/written to,
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it will be used (assuming you have no higher-level loggers available).
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See the documentation for GetLogger for details on other arguments.
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Only the first logPaths entry that "works" will be used, later entries will be ignored.
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Currently this will almost always return a WinLogger.
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*/
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func (m *MultiLogger) AddDefaultLogger(identifier string, eventIDs *WinEventID, logFlags int, logPaths ...string) (err error) {
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var l Logger
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var exists bool
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if identifier == "" {
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identifier = uuid.New().String()
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}
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if _, exists = m.Loggers[identifier]; exists {
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err = ErrExistingLogger
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return
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}
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if logPaths != nil {
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l, err = GetLogger(m.EnableDebug, m.Prefix, eventIDs, logFlags, logPaths...)
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} else {
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l, err = GetLogger(m.EnableDebug, m.Prefix, eventIDs, logFlags)
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}
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if err != nil {
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return
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}
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m.Loggers[identifier] = l
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return
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}
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/*
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AddWinLogger adds a WinLogger to a MultiLogger. Note that this is a VERY generalized interface to the Windows Event Log.
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If you require more robust logging capabilities (e.g. custom event IDs per uniquely identifiable event),
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you will want to set up your own logger (golang.org/x/sys/windows/svc/eventlog).
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identifier is a string to use to identify the added WinLogger in MultiLogger.Loggers.
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If empty, one will be automatically generated.
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A blank source will return an error as it's used as the source name. Other functions, struct fields, etc. will refer to this as the "prefix".
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A pointer to a WinEventID struct may be specified for eventIDs to map extended logging levels (as Windows only supports three levels natively).
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If it is nil, a default one (DefaultEventID) will be used.
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See GetLogger for details.
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*/
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func (m *MultiLogger) AddWinLogger(identifier, source string, eventIDs *WinEventID) (err error) {
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var exists bool
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var prefix string
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if identifier == "" {
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identifier = uuid.New().String()
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}
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if _, exists = m.Loggers[identifier]; exists {
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err = ErrExistingLogger
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return
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}
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if eventIDs == nil {
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eventIDs = DefaultEventID
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}
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m.Loggers[identifier] = &WinLogger{
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Prefix: source,
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EnableDebug: m.EnableDebug,
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eids: eventIDs,
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}
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if err = m.Loggers[identifier].Setup(); err != nil {
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return
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}
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if prefix, err = m.Loggers[identifier].GetPrefix(); err != nil {
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return
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}
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m.Loggers[identifier].Info("logger initialized of type %T with prefix %v", m.Loggers[identifier], prefix)
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return
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}
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