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-rw-r--r--cmd/lspipeline/main.go82
1 files changed, 64 insertions, 18 deletions
diff --git a/cmd/lspipeline/main.go b/cmd/lspipeline/main.go
index b649778..131ff12 100644
--- a/cmd/lspipeline/main.go
+++ b/cmd/lspipeline/main.go
@@ -12,6 +12,7 @@ import (
"os/exec"
"sort"
"strings"
+ "time"
"rescribe.xyz/bookpipeline"
)
@@ -35,7 +36,7 @@ type LsPipeliner interface {
AnalyseQueueId() string
GetQueueDetails(url string) (string, string, error)
GetInstanceDetails() ([]bookpipeline.InstanceDetails, error)
- ListObjectsWithMeta(bucket string, prefix string) ([]bookpipeline.ObjMeta, error)
+ ListObjectWithMeta(bucket string, prefix string) (bookpipeline.ObjMeta, error)
ListObjectPrefixes(bucket string) ([]string, error)
WIPStorageId() string
}
@@ -100,43 +101,88 @@ func (o ObjMetas) Less(i, j int) bool {
return o[i].Date.Before(o[j].Date)
}
+// getBookDetails determines whether a book is done and what date
+// it was completed, or if it has not finished, the date of any
+// book file.
+func getBookDetails(conn LsPipeliner, key string) (date time.Time, done bool, err error) {
+ // First try to get the graph.png file from the book, which marks
+ // it as done
+ obj, err := conn.ListObjectWithMeta(conn.WIPStorageId(), key+"graph.png")
+ if err == nil {
+ return obj.Date, true, nil
+ }
+
+ // Otherwise get any file from the book to get a date to sort by
+ obj, err = conn.ListObjectWithMeta(conn.WIPStorageId(), key)
+ if err != nil {
+ return time.Time{}, false, err
+ }
+ return obj.Date, false, nil
+}
+
+// getBookDetailsChan gets the details for a book putting it into either the
+// done or inprogress channels as appropriate, or sending an error to errc
+// on failure.
+func getBookDetailsChan(conn LsPipeliner, key string, done chan bookpipeline.ObjMeta, inprogress chan bookpipeline.ObjMeta, errc chan error) {
+ date, isdone, err := getBookDetails(conn, key)
+ if err != nil {
+ errc <- err
+ return
+ }
+ meta := bookpipeline.ObjMeta{Name: strings.TrimSuffix(key, "/"), Date: date}
+ if isdone {
+ done <- meta
+ } else {
+ inprogress <- meta
+ }
+}
+
// getBookStatus returns a list of in progress and done books.
// It determines this by finding all prefixes, and splitting them
// into two lists, those which have a 'graph.png' file (the done
// list), and those which do not (the inprogress list). They are
// sorted according to the date of the graph.png file, or the date
// of a random file with the prefix if no graph.png was found.
+// It spins up many goroutines to do query the book status and
+// dates, as it is far faster to do concurrently.
func getBookStatus(conn LsPipeliner) (inprogress []string, done []string, err error) {
prefixes, err := conn.ListObjectPrefixes(conn.WIPStorageId())
- var inprogressmeta, donemeta ObjMetas
if err != nil {
log.Println("Error getting object prefixes:", err)
return
}
- // Search for graph.png to determine done books (and save the date of it to sort with)
+
+ donec := make(chan bookpipeline.ObjMeta, 100)
+ inprogressc := make(chan bookpipeline.ObjMeta, 100)
+ errc := make(chan error)
+
for _, p := range prefixes {
- objs, err := conn.ListObjectsWithMeta(conn.WIPStorageId(), p+"graph.png")
- if err != nil || len(objs) == 0 {
- inprogressmeta = append(inprogressmeta, bookpipeline.ObjMeta{Name: p})
- } else {
- donemeta = append(donemeta, bookpipeline.ObjMeta{Name: p, Date: objs[0].Date})
- }
+ go getBookDetailsChan(conn, p, donec, inprogressc, errc)
}
- // Get a random file from the inprogress list to get a date to sort by
- for _, i := range inprogressmeta {
- objs, err := conn.ListObjectsWithMeta(conn.WIPStorageId(), i.Name)
- if err != nil || len(objs) == 0 {
- continue
+
+ var inprogressmeta, donemeta ObjMetas
+
+ // there will be exactly as many sends to donec or inprogressc
+ // as there are prefixes
+ for range prefixes {
+ select {
+ case i := <-donec:
+ donemeta = append(donemeta, i)
+ case i := <-inprogressc:
+ inprogressmeta = append(inprogressmeta, i)
+ case err = <-errc:
+ return inprogress, done, err
}
- i.Date = objs[0].Date
}
+
sort.Sort(donemeta)
+ sort.Sort(inprogressmeta)
+
for _, i := range donemeta {
- done = append(done, strings.TrimSuffix(i.Name, "/"))
+ done = append(done, i.Name)
}
- sort.Sort(inprogressmeta)
for _, i := range inprogressmeta {
- inprogress = append(inprogress, strings.TrimSuffix(i.Name, "/"))
+ inprogress = append(inprogress, i.Name)
}
return