diff options
Diffstat (limited to 'cmd/lspipeline-ng/main.go')
| -rw-r--r-- | cmd/lspipeline-ng/main.go | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/cmd/lspipeline-ng/main.go b/cmd/lspipeline-ng/main.go index 94b81c2..dbafafa 100644 --- a/cmd/lspipeline-ng/main.go +++ b/cmd/lspipeline-ng/main.go @@ -12,6 +12,7 @@ import ( "os/exec" "sort" "strings" + "sync" "time" "rescribe.xyz/bookpipeline" @@ -126,9 +127,11 @@ func getBookDetails(conn LsPipeliner, key string) (date time.Time, done bool, er // 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) { +func getBookDetailsChan(conn LsPipeliner, wg *sync.WaitGroup, key string, done chan bookpipeline.ObjMeta, inprogress chan bookpipeline.ObjMeta, errc chan error) { + fmt.Printf("getting book details for %s\n", key) date, isdone, err := getBookDetails(conn, key) if err != nil { + wg.Done() errc <- err return } @@ -138,6 +141,7 @@ func getBookDetailsChan(conn LsPipeliner, key string, done chan bookpipeline.Obj } else { inprogress <- meta } + wg.Done() } // getBookStatus returns a list of in progress and done books. @@ -159,9 +163,19 @@ func getBookStatus(conn LsPipeliner) (inprogress []string, done []string, err er inprogressc := make(chan bookpipeline.ObjMeta, 100) errc := make(chan error) - for _, p := range prefixes { - go getBookDetailsChan(conn, p, donec, inprogressc, errc) - } + // This is a bit messy, but it works. We get the book details in blocks of + // 30 simultaneous requests, using wait groups to pause once each 20 have + // been sent. + go func() { + var wg sync.WaitGroup + for i, p := range prefixes { + wg.Add(1) + go getBookDetailsChan(conn, &wg, p, donec, inprogressc, errc) + if i % 30 == 0 { + wg.Wait() + } + } + }() var inprogressmeta, donemeta ObjMetas |