func getFileIndexLoop(in chan net.IP, out chan fileindex.FileManifest) {
resultSet := fileindex.NewFileManifest()
for ip := range in {
fileList, err := GetFileIndex(ip)
if err != nil {
continue
}
resultSet.Put(ip, fileList)
}
out <- resultSet
}
func BuildFileManifest() (fileManifest fileindex.FileManifest) {
fileManifest = fileindex.NewFileManifest()
peerList := addressList.Contents()
out1 := make(chan net.IP)
out2 := make(chan net.IP)
out3 := make(chan net.IP)
out4 := make(chan net.IP)
in1 := make(chan fileindex.FileManifest)
in2 := make(chan fileindex.FileManifest)
in3 := make(chan fileindex.FileManifest)
in4 := make(chan fileindex.FileManifest)
go getFileIndexLoop(out1, in1)
go getFileIndexLoop(out2, in2)
go getFileIndexLoop(out3, in3)
go getFileIndexLoop(out4, in4)
for _, item := range peerList {
select {
case out1 <- item.IP:
case out2 <- item.IP:
case out3 <- item.IP:
case out4 <- item.IP:
}
}
close(out1)
close(out2)
close(out3)
close(out4)
for i := 0; i < 4; i++ {
select {
case manifest := <-in1:
fileManifest = aggregate(manifest, fileManifest)
case manifest := <-in2:
fileManifest = aggregate(manifest, fileManifest)
case manifest := <-in3:
fileManifest = aggregate(manifest, fileManifest)
case manifest := <-in4:
fileManifest = aggregate(manifest, fileManifest)
}
}
log.Println("File index created")
return
}