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channels.go
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channels.go
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package main
import (
"sync"
)
type Files struct {
Chan chan File
Close sync.Once
}
func (c *Files) close() {
c.Close.Do(func() {
close(c.Chan)
})
}
func (c *Files) empty() {
for {
select {
case _, ok := <-c.Chan:
if !ok {
return
}
default:
return
}
}
}
type Chunks struct {
Chan chan Chunk
Close sync.Once
}
func (c *Chunks) close() {
c.Close.Do(func() {
close(c.Chan)
})
}
func (c *Chunks) empty() {
for {
select {
case _, ok := <-c.Chan:
if !ok {
return
}
default:
return
}
}
}
type Articles struct {
Chan chan Article
Close sync.Once
}
func (c *Articles) close() {
c.Close.Do(func() {
close(c.Chan)
})
}
func (c *Articles) empty() {
for {
select {
case _, ok := <-c.Chan:
if !ok {
return
}
default:
return
}
}
}
var (
files Files
inputChunks Chunks
outputChunks Chunks
articles Articles
)
func init() {
// make channels
files.Chan = make(chan File, 1)
inputChunks.Chan = make(chan Chunk, conf.Connections*2)
outputChunks.Chan = make(chan Chunk, conf.Connections*2)
articles.Chan = make(chan Article, conf.Connections*2)
}