Create Handler Collection to provide Handlers in a centralized location to avoid localized Lambda

src/main/java/cavecomm/HandlerCollection.java

@@ -0,0 +1,47 @@
+package cavecomm;
+
+import io.vertx.core.AsyncResult;
+import io.vertx.core.json.JsonArray;
+import io.vertx.ext.web.RoutingContext;
+import io.vertx.sqlclient.Row;
+import io.vertx.sqlclient.RowSet;
+
+//Class collecting Handlers to be used instead of Complex Lmabdas
+public final class HandlerCollection {
+  private HandlerCollection() {
+  }
+
+  //returns a response containing the query result as a JSON
+  public static void outputJSON(AsyncResult<RowSet<Row>> ar, RoutingContext rc) {
+    if (ar.succeeded()) {
+      RowSet<Row> result = ar.result();
+      //dump RowSet into jsonArray
+      JsonArray jsonArray = new JsonArray();
+      for (Row r : result) {
+        jsonArray.add(r.toJson());
+      }
+      //sets the header to json
+      rc.response().putHeader("Content-Type", "application/json; charset=UTF8")
+        .end(jsonArray.encode());
+    } else {
+      System.out.println("Failure: " + ar.cause().getMessage());
+    }
+  }
+
+  //Potentially unnecessary to exist as its own handler
+  public static void outputHTML(AsyncResult<RowSet<Row>> ar, RoutingContext rc) {
+    if (ar.succeeded()) {
+      RowSet<Row> result = ar.result();
+      //dump RowSet into jsonArray
+      JsonArray jsonArray = new JsonArray();
+      for (Row r : result) {
+        jsonArray.add(r.toJson());
+      }
+      //sets the header to html
+      rc.response().putHeader("Content-Type", "text/html; charset=UTF8")
+        .end(jsonArray.encodePrettily());
+    } else {
+      System.out.println("Failure: " + ar.cause().getMessage());
+    }
+  }
+}