Asynchronously process OSM elements.

OsmToDatabase.Peaks/Program.cs

@@ -7,11 +7,8 @@ long counter = 0;
 
 HashSet<string> naturalPeakFeatures = new HashSet<string> { "peak", "volcano" };
 
-using (var fileStream = new FileInfo(args[0]).OpenRead())
+async Task ProcessOsmElement(OsmGeo? element)
 {
-    var source = new PBFOsmStreamSource(fileStream);
-    foreach (var element in source)
-    {
     if (element is Node node)
     {
         string? naturalValue = node.TagValueByKey("natural");
@@ -19,19 +16,19 @@ using (var fileStream = new FileInfo(args[0]).OpenRead())
         // Skip if natural tag is missing.
         if (naturalValue is null)
         {
-                continue;
+            return;
         }
 
         // Skip if the node is not a desired feature.
         if (!naturalPeakFeatures.Contains(naturalValue))
         {
-                continue;
+            return;
         }
 
         // Skip if elevation is missing.
         if (node.TagDoubleValueByKey("ele") is null)
         {
-                continue;
+            return;
         }
 
         Peak peak = new Peak
@@ -63,6 +60,14 @@ using (var fileStream = new FileInfo(args[0]).OpenRead())
             await db.SaveChangesAsync();
         }
     }
+}
+
+using (var fileStream = new FileInfo(args[0]).OpenRead())
+{
+    var source = new PBFOsmStreamSource(fileStream);
+    foreach (var element in source)
+    {
+        await ProcessOsmElement(element);
     }
     await db.SaveChangesAsync();
 }