Awesome

gostream

Stream Processing library for Go

TODO

• Window
  • LengthWindow
  • LengthBatchWindow
  • TimeWindow
  • TimeBatchWindow
• Select
• Where
  • Equals, NotEquals
  • Larger, Less
  • AND, OR
• OrderBy
• Limit, Offset
• Aggregate Function
  • Avg, Sum, Count
  • Max, Min

Example

type LogEvent struct {
  Time    time.Time
  Level   int
  Message string
}

q := "select * from LogEvent.length(10)"
s, err := gostream.New().
    Add(LogEvent{}).
    Query(q)
if err != nil {
  fmt.Printf("new gostream: %v", err)
  return
}
defer s.Close()

go func() {
  for {
    fmt.Printf("%v\n", <-s.Output())
  }
}()

s.Input() <- LogEvent{
  Time: time.Now()
  Level: 1
  Message: "something happened"
}

type LogEvent struct {
  Time    time.Time
  Level   int
  Message string
}

s := stream.New().
  SelectAll().
  From(LogEvent{}).
  Length(10).
  OrderBy("Level", stream.DESC).
  Limit(10, 5)
defer s.Close()
go s.Run()

go func() {
  for {
    fmt.Printf("%v\n", <-s.Output())
  }
}()

s.Input() <- LogEvent{
  Time: time.Now()
  Level: 1
  Message: "something happened"
}