What's Changed

• Fix typos by @shawnps in #27 #28
• Provide a custom StringParser to the Reader by @jeffw-wherethebitsroam in #32 #33
• Don't require format to be exhaustive by @haswalt in #34
• Expand RegEx by @severin-buerstel in #38
• Add Fields method to Entry struct to get all fields by @yaa110 in #40
• Fix parse log format that contains concatenated fields incorrect by @coldnight in #43
• Add function to return int values by @aman00323 in #49

New Contributors

• @shawnps made their first contribution in #27
• @jeffw-wherethebitsroam made their first contribution in #32
• @haswalt made their first contribution in #34
• @severin-buerstel made their first contribution in #38
• @yaa110 made their first contribution in #40
• @coldnight made their first contribution in #43
• @aman00323 made their first contribution in #49

Full Changelog: v1.3.0...v1.4.0

Major features

• Introduce Filter interface #19. It acts similar to Reducer, but it is about limiting chain entries.
  • Has Filter(*Entry) *Entry method to check is entry meets filter condition
  • Implements Reducer interface too, to be used in chains
• Datetime filter #19. Its based on this PR #11 by @pshevtsov
• Introduce StringParser #24 by @pshevtsov

Minor features

• Run test for go version up to 1.5
• Linting fixes #13, #14 (thanks to @pshevtsov)
• More examples, espetially for reducers #17
• Use goconvey for tests

Bugfixes

• Fixed Reader examples #21
• Long lines reading #23 by @pshevtsov
• Fix nginx conf parsing, deal with commented lines #25 by @jack1582

Hall of Glory

Special thanks to @pshevtsov for doing so much!

• Parsing last value without quotes was fixed, #9
• Tested for Go v1.3

• Fix issue #6 which causes parser to crash if some value in a log line was empty
• Fix TestGroupByReducer #4, it was random crashing, because we could not expect the order of entries readed from an output channel

Whats new

• The aggregation reducers such as Avg, Sum and Count was introduces along with Chain and GroupBy reducers.
• Entry got some new mthods
  • Getters Field(name string), FloatField(name string)
  • Setters SetField(name string, value string), SetFloatField(name string, value float64), SetUintField(name string, uint64)
  • Utility methods Merge(entry *Entry), FieldsHash(fields []string), Partial(fields []string)

Backward incompatibilities

• All functions deals with *Entry instead of Entry
• MapReduce returns chan *Entry instead of chan interface{} and all reducers accept output channel as chan *Entry
• Entry is a struct, not a map[string]string anymore and has two constructors NewEntry that accepts Fields and NewEmptyEntry
• Entry.Get was renamed to Entry.Field

Implement function MapReduce to parse log file in asynchronous manner for speed improvement. Reader.Read and constructors signatures and behaviour still the same.

Log reader type Reader with the following constructors

• func NewReader(logFile io.Reader, format string) *Reader
• func NewNginxReader(logFile io.Reader, nginxConf io.Reader, formatName string) (reader *Reader, err error)

And one interface method

• func (r *Reader) Read() (record Entry, err error)