"time"
)
-/*
- Keepstore initiates pull worker channel goroutine.
- The channel will process pull list.
- For each (next) pull request:
- For each locator listed, execute Pull on the server(s) listed
- Skip the rest of the servers if no errors
- Repeat
-*/
+// RunPullWorker is used by Keepstore to initiate pull worker channel goroutine.
+// The channel will process pull list.
+// For each (next) pull request:
+// For each locator listed, execute Pull on the server(s) listed
+// Skip the rest of the servers if no errors
+// Repeat
+//
func RunPullWorker(pullq *WorkQueue, keepClient *keepclient.KeepClient) {
nextItem := pullq.NextItem
for item := range nextItem {
pullRequest := item.(PullRequest)
- err := PullItemAndProcess(item.(PullRequest), GenerateRandomApiToken(), keepClient)
+ err := PullItemAndProcess(item.(PullRequest), GenerateRandomAPIToken(), keepClient)
+ pullq.DoneItem <- struct{}{}
if err == nil {
log.Printf("Pull %s success", pullRequest)
} else {
}
}
-/*
- For each Pull request:
- Generate a random API token.
- Generate a permission signature using this token, timestamp ~60 seconds in the future, and desired block hash.
- Using this token & signature, retrieve the given block.
- Write to storage
-*/
+// PullItemAndProcess pulls items from PullQueue and processes them.
+// For each Pull request:
+// Generate a random API token.
+// Generate a permission signature using this token, timestamp ~60 seconds in the future, and desired block hash.
+// Using this token & signature, retrieve the given block.
+// Write to storage
+//
func PullItemAndProcess(pullRequest PullRequest, token string, keepClient *keepclient.KeepClient) (err error) {
keepClient.Arvados.ApiToken = token
- service_roots := make(map[string]string)
+ serviceRoots := make(map[string]string)
for _, addr := range pullRequest.Servers {
- service_roots[addr] = addr
+ serviceRoots[addr] = addr
}
- keepClient.SetServiceRoots(service_roots, nil)
+ keepClient.SetServiceRoots(serviceRoots, nil, nil)
// Generate signature with a random token
- expires_at := time.Now().Add(60 * time.Second)
- signedLocator := SignLocator(pullRequest.Locator, token, expires_at)
+ expiresAt := time.Now().Add(60 * time.Second)
+ signedLocator := SignLocator(pullRequest.Locator, token, expiresAt)
reader, contentLen, _, err := GetContent(signedLocator, keepClient)
if err != nil {
}
defer reader.Close()
- read_content, err := ioutil.ReadAll(reader)
+ readContent, err := ioutil.ReadAll(reader)
if err != nil {
return err
}
- if (read_content == nil) || (int64(len(read_content)) != contentLen) {
+ if (readContent == nil) || (int64(len(readContent)) != contentLen) {
return errors.New(fmt.Sprintf("Content not found for: %s", signedLocator))
}
- err = PutContent(read_content, pullRequest.Locator)
+ err = PutContent(readContent, pullRequest.Locator)
return
}
return reader, blocklen, url, err
}
-const ALPHA_NUMERIC = "0123456789abcdefghijklmnopqrstuvwxyz"
+const alphaNumeric = "0123456789abcdefghijklmnopqrstuvwxyz"
-func GenerateRandomApiToken() string {
+// GenerateRandomAPIToken generates a random api token
+func GenerateRandomAPIToken() string {
var bytes = make([]byte, 36)
rand.Read(bytes)
for i, b := range bytes {
- bytes[i] = ALPHA_NUMERIC[b%byte(len(ALPHA_NUMERIC))]
+ bytes[i] = alphaNumeric[b%byte(len(alphaNumeric))]
}
return (string(bytes))
}
// Put block
var PutContent = func(content []byte, locator string) (err error) {
- err = PutBlock(content, locator)
+ _, err = PutBlock(content, locator)
return
}