func pollFetchAndPush(subObj *lib.Sub, img *image.Image,
imageServerAddress string, timeoutTime time.Time,
logger *log.Logger) error {
var generationCount uint64
deleteEarly := *deleteBeforeFetch
for ; time.Now().Before(timeoutTime); time.Sleep(time.Second) {
var pollReply sub.PollResponse
if err := pollAndBuildPointers(subObj.Client, &generationCount,
&pollReply); err != nil {
return err
}
if pollReply.FileSystem == nil {
continue
}
if deleteEarly {
deleteEarly = false
if deleteUnneededFiles(subObj.Client, pollReply.FileSystem,
img.FileSystem, logger) {
continue
}
}
subObj.FileSystem = pollReply.FileSystem
subObj.ObjectCache = pollReply.ObjectCache
startTime := showStart("lib.BuildMissingLists()")
objectsToFetch, objectsToPush := lib.BuildMissingLists(*subObj, img,
true, true, logger)
showTimeTaken(startTime)
if len(objectsToFetch) < 1 && len(objectsToPush) < 1 {
return nil
}
if len(objectsToFetch) > 0 {
startTime := showStart("Fetch()")
err := subObj.Client.RequestReply("Subd.Fetch", sub.FetchRequest{
ServerAddress: imageServerAddress,
Wait: true,
Hashes: objectsToFetch},
&sub.FetchResponse{})
if err != nil {
showBlankLine()
logger.Printf("Error calling %s:Subd.Fetch(%s): %s\n",
subObj.Hostname, imageServerAddress, err)
return err
}
showTimeTaken(startTime)
}
if len(objectsToPush) > 0 {
startTime := showStart("lib.PushObjects()")
err := lib.PushObjects(*subObj, objectsToPush, logger)
if err != nil {
showBlankLine()
return err
}
showTimeTaken(startTime)
}
}
return errors.New("timed out fetching and pushing objects")
}
func pushImage(getSubClient getSubClientFunc, imageName string) error {
logger := log.New(os.Stderr, "", log.LstdFlags)
computedInodes := make(map[string]*filesystem.RegularInode)
// Start querying the imageserver for the image.
imageServerAddress := fmt.Sprintf("%s:%d",
*imageServerHostname, *imageServerPortNum)
imgChannel := getImageChannel(imageServerAddress, imageName, timeoutTime)
startTime := showStart("getSubClient()")
srpcClient := getSubClient()
showTimeTaken(startTime)
subObj := lib.Sub{
Hostname: *subHostname,
Client: srpcClient,
ComputedInodes: computedInodes}
if *computedFilesRoot == "" {
subObj.ObjectGetter = nullObjectGetterType{}
} else {
fs, err := scanner.ScanFileSystem(*computedFilesRoot, nil, nil, nil,
nil, nil)
if err != nil {
return err
}
subObj.ObjectGetter = fs
for filename, inum := range fs.FilenameToInodeTable() {
if inode, ok := fs.InodeTable[inum].(*filesystem.RegularInode); ok {
computedInodes[filename] = inode
}
}
}
startTime = showStart("<-imgChannel")
imageResult := <-imgChannel
showTimeTaken(startTime)
fmt.Fprintf(os.Stderr, "Background image fetch took %s\n",
format.Duration(imageResult.duration))
img := imageResult.image
var err error
if *filterFile != "" {
img.Filter, err = filter.Load(*filterFile)
if err != nil {
return err
}
}
if *triggersFile != "" {
img.Triggers, err = triggers.Load(*triggersFile)
if err != nil {
return err
}
} else if *triggersString != "" {
img.Triggers, err = triggers.Decode([]byte(*triggersString))
if err != nil {
return err
}
}
if err := pollFetchAndPush(&subObj, img, imageServerAddress, timeoutTime,
logger); err != nil {
return err
}
var updateRequest sub.UpdateRequest
var updateReply sub.UpdateResponse
startTime = showStart("lib.BuildUpdateRequest()")
if lib.BuildUpdateRequest(subObj, img, &updateRequest, true, logger) {
showBlankLine()
return errors.New("missing computed file(s)")
}
showTimeTaken(startTime)
updateRequest.ImageName = imageName
updateRequest.Wait = true
startTime = showStart("Subd.Update()")
err = client.CallUpdate(srpcClient, updateRequest, &updateReply)
if err != nil {
showBlankLine()
return err
}
showTimeTaken(startTime)
return nil
}