Populate Database and main function as entrypoint

main.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/alexsanjoseph/riemann-divisor-sum-go/riemann"
+)
+
+func handleClose(db riemann.DivisorDb) {
+	fmt.Println("Got Interrupt. Shutting down...")
+	summarizeOutput := db.Summarize()
+	fmt.Println("\nHighest Number Analyzed\n======")
+
+	fmt.Printf("%+v\n", summarizeOutput.LargestComputedN)
+	fmt.Println("\nLargest Witness Value\n======")
+	fmt.Printf("%+v\n", summarizeOutput.LargestWitnessValue)
+
+}
+
+func main() {
+	sigCh := make(chan os.Signal, 1)
+	signal.Notify(sigCh, os.Interrupt, syscall.SIGINT)
+	var db = riemann.DivisorDb(riemann.InMemoryDivisorDb{Data: make(map[int]riemann.RiemannDivisorSum)})
+	go riemann.PopulateDB(db, 1000000)
+
+	<-sigCh
+	handleClose(db)
+}

riemann/populate_database.go

@@ -0,0 +1,20 @@
+package riemann
+
+import "fmt"
+
+func PopulateDB(db DivisorDb, batchSize int) {
+	var startingN int
+	dbStartingN := db.Summarize().LargestComputedN.N
+	if dbStartingN < 5040 {
+		startingN = 5041
+	} else {
+		startingN = dbStartingN
+	}
+
+	for {
+		endingN := startingN + batchSize - 1
+		db.Upsert(ComputerRiemannDivisorSums(startingN, endingN))
+		fmt.Printf("Computed Sums from %d to %d\n", startingN, endingN)
+		startingN = endingN + 1
+	}
+}