Adds a first version of a new obidistribute command

pkg/obiseq/distribute.go

@@ -0,0 +1,107 @@
+package obiseq
+
+import (
+	"fmt"
+	"sync"
+)
+
+type IDistribute struct {
+	outputs map[string]IBioSequenceBatch
+	news    chan string
+	lock    *sync.Mutex
+}
+
+func (dist *IDistribute) Outputs(key string) (IBioSequenceBatch, error) {
+	dist.lock.Lock()
+	iter, ok := dist.outputs[key]
+	dist.lock.Unlock()
+
+	if !ok {
+		return NilIBioSequenceBatch, fmt.Errorf("key %s unknown", key)
+	}
+
+	return iter, nil
+}
+
+func (dist *IDistribute) News() chan string {
+	return dist.news
+}
+
+func (iterator IBioSequenceBatch) Distribute(class SequenceClassifier, sizes ...int) IDistribute {
+	batchsize := 5000
+	buffsize := 2
+
+	outputs := make(map[string]IBioSequenceBatch, 100)
+	slices := make(map[string]*BioSequenceSlice, 100)
+	orders := make(map[string]int, 100)
+	news := make(chan string)
+
+	if len(sizes) > 0 {
+		batchsize = sizes[0]
+	}
+
+	if len(sizes) > 1 {
+		buffsize = sizes[1]
+	}
+
+	jobDone := sync.WaitGroup{}
+	lock := sync.Mutex{}
+
+	jobDone.Add(1)
+
+	go func() {
+		jobDone.Wait()
+		close(news)
+		for _, i := range outputs {
+			close(i.Channel())
+		}
+	}()
+
+	go func() {
+		iterator = iterator.SortBatches()
+
+		for iterator.Next() {
+			seqs := iterator.Get()
+			for _, s := range seqs.slice {
+				key := class(s)
+				slice, ok := slices[key]
+
+				if !ok {
+					s := make(BioSequenceSlice, 0, batchsize)
+					slice = &s
+					slices[key] = slice
+					orders[key] = 0
+
+					lock.Lock()
+					outputs[key] = MakeIBioSequenceBatch(batchsize, buffsize)
+					lock.Unlock()
+
+					news <- key
+				}
+
+				*slice = append(*slice, s)
+				if len(*slice) == batchsize {
+					outputs[key].Channel() <- MakeBioSequenceBatch(orders[key], *slice...)
+					orders[key]++
+					s := make(BioSequenceSlice, 0, batchsize)
+					slices[key] = &s
+				}
+			}
+		}
+
+		for key, slice := range slices {
+			if len(*slice) > 0 {
+				outputs[key].Channel() <- MakeBioSequenceBatch(orders[key], *slice...)
+			}
+		}
+
+		jobDone.Done()
+
+	}()
+
+	return IDistribute{
+		outputs,
+		news,
+		&lock}
+
+}