/
collect.go
50 lines (42 loc) · 1009 Bytes
/
collect.go
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package test
import (
"time"
"gopkg.in/sensorbee/sensorbee.v0/bql/udf"
"gopkg.in/sensorbee/sensorbee.v0/core"
"gopkg.in/sensorbee/sensorbee.v0/data"
)
type Collector struct {
interval time.Duration
stopped int32
check int
}
func (c *Collector) Process(ctx *core.Context, tuple *core.Tuple, w core.Writer) error {
curTime := int(time.Now().Nanosecond() / 1e+8)
if curTime == c.check {
return nil
} else {
c.check = curTime
if err := w.Write(ctx, tuple); err != nil {
return err
}
}
// time.Sleep(c.interval)
return nil
}
func (c *Collector) Terminate(ctx *core.Context) error {
return nil
}
func CreateCollector(decl udf.UDSFDeclarer, inputStream, field string, i data.Value) (udf.UDSF, error) {
interval, err := data.ToDuration(i)
if err != nil {
return nil, err
}
// cannot understand yet
if err := decl.Input(inputStream, nil); err != nil {
return nil, err
}
return &Collector{
interval: interval,
check: int(time.Now().Nanosecond() / 1e+8),
}, nil
}