getOptionalInt for configs & allow custom ports for json api

Author: mspruc

wayang-api/wayang-api-json/src/main/scala/Main.scala

@@ -70,5 +70,8 @@ object Main extends ZIOAppDefault {
   val app = Routes(drawRoute, jsonRoute).toHttpApp
 
   // Run it like any simple app
-  override val run = Server.serve(app).provide(Server.default)
+  def run = for {
+    args <- getArgs
+    _ <- Server.serve(app).provide(Server.defaultWithPort((args.headOption getOrElse "8080" toInt)))
+  } yield ()
 }

wayang-commons/wayang-core/src/main/java/org/apache/wayang/core/api/Configuration.java

@@ -75,6 +75,7 @@
 import java.util.Map;
 import java.util.Optional;
 import java.util.OptionalDouble;
+import java.util.OptionalInt;
 import java.util.OptionalLong;
 import java.util.Properties;
 import java.util.Random;
@@ -778,6 +779,20 @@ public long getLongProperty(String key) {
         return optionalLongProperty.getAsLong();
     }
 
+    
+    public OptionalInt getOptionalIntProperty(String key) {
+        final Optional<String> intValue = this.properties.optionallyProvideFor(key);
+        if (intValue.isPresent()) {
+            return OptionalInt.of(Integer.valueOf(intValue.get()));
+        } else {
+            return OptionalInt.empty();
+        }
+    }
+
+    public int getIntProperty(String key) {
+        return getOptionalIntProperty(key).orElseThrow(() -> new WayangException(String.format("No value for \"%s\".", key)));
+    }
+
     public long getLongProperty(String key, long fallback) {
         return this.getOptionalLongProperty(key).orElse(fallback);
     }