Added ErrorLayer over ResponseArea and made minor UI tweaks

src/main/java/com/rohitawate/restaurant/dashboard/DashboardController.java

@@ -35,9 +35,12 @@ import javafx.scene.layout.HBox;
 import javafx.scene.layout.VBox;
 
 import javax.ws.rs.core.Response;
+import java.io.FileNotFoundException;
 import java.io.IOException;
+import java.net.ConnectException;
 import java.net.MalformedURLException;
 import java.net.URL;
+import java.net.UnknownHostException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.ResourceBundle;
@@ -50,13 +53,13 @@ public class DashboardController implements Initializable {
     @FXML
     private ComboBox<String> httpMethodBox;
     @FXML
-    private VBox responseBox, loadingLayer, promptLayer, paramsBox;
+    private VBox responseBox, loadingLayer, promptLayer, errorLayer, paramsBox;
     @FXML
     private HBox responseDetails;
     @FXML
     private TextArea responseArea;
     @FXML
-    private Label statusCode, statusCodeDescription, responseTime, responseSize;
+    private Label statusCode, statusCodeDescription, responseTime, responseSize, errorTitle, errorDetails;
     @FXML
     private JFXButton cancelButton;
     @FXML
@@ -92,11 +95,13 @@ public class DashboardController implements Initializable {
             IOE.printStackTrace();
         }
 
-        addressField.setText("http://localhost:8080/api/members/file");
+        addressField.setText("https://anapioficeandfire.com/api/characters/583");
         responseBox.getChildren().remove(0);
         promptLayer.setVisible(true);
         httpMethodBox.getItems().addAll(httpMethods);
-        httpMethodBox.getSelectionModel().select(1);
+
+        // Selects GET by default
+        httpMethodBox.getSelectionModel().select(0);
 
         paramsControllers = new ArrayList<>();
         appendedParams = new ArrayList<>();
@@ -139,10 +144,12 @@ public class DashboardController implements Initializable {
                     cancelButton.setOnAction(e -> requestManager.cancel());
                     requestManager.setOnRunning(e -> {
                         responseArea.clear();
+                        errorLayer.setVisible(false);
                         loadingLayer.setVisible(true);
                     });
                     requestManager.setOnSucceeded(e -> {
                         updateDashboard(requestManager.getValue());
+                        errorLayer.setVisible(false);
                         loadingLayer.setVisible(false);
                         requestManager.reset();
                     });
@@ -154,8 +161,13 @@ public class DashboardController implements Initializable {
                     });
                     requestManager.setOnFailed(e -> {
                         loadingLayer.setVisible(false);
-                        promptLayer.setVisible(true);
+                        errorLayer.setVisible(true);
-                        snackBar.show("Request timed out. Server is unavailable or didn't respond.", 10000);
+                        Throwable exception = requestManager.getException().getCause();
+
+                        if (exception.getClass() == UnknownHostException.class) {
+                            errorTitle.setText("No Internet Connection");
+                            errorDetails.setText("Could not connect to the server. Please check your connection.");
+                        }
                         requestManager.reset();
                     });
                     requestManager.start();
@@ -176,10 +188,12 @@ public class DashboardController implements Initializable {
                     cancelButton.setOnAction(e -> requestManager.cancel());
                     requestManager.setOnRunning(e -> {
                         responseArea.clear();
+                        errorLayer.setVisible(false);
                         loadingLayer.setVisible(true);
                     });
                     requestManager.setOnSucceeded(e -> {
                         updateDashboard(requestManager.getValue());
+                        errorLayer.setVisible(false);
                         loadingLayer.setVisible(false);
                         requestManager.reset();
                     });
@@ -189,7 +203,15 @@ public class DashboardController implements Initializable {
                         snackBar.show("Request canceled.", 2000);
                         requestManager.reset();
                     });
-                    requestManager.setOnFailed(e -> requestManager.getException().printStackTrace());
+                    requestManager.setOnFailed(e -> {
+                        loadingLayer.setVisible(false);
+                        promptLayer.setVisible(true);
+                        if (requestManager.getException().getClass() == ConnectException.class)
+                            snackBar.show("Request timed out. Server is unavailable or didn't respond.", 10000);
+                        else if (requestManager.getException().getClass() == FileNotFoundException.class)
+                            snackBar.show("File could not be found.", 5000);
+                        requestManager.reset();
+                    });
                     requestManager.start();
                     break;
                 default:
@@ -198,7 +220,9 @@ public class DashboardController implements Initializable {
         } catch (MalformedURLException MURLE) {
             snackBar.show("Invalid address. Please verify and try again.", 3000);
         } catch (Exception E) {
-            snackBar.show("Something went wrong. Couldn't process request.", 5000);
+            errorLayer.setVisible(true);
+            errorTitle.setText("Oops... That's embarrassing!");
+            errorDetails.setText("Something went wrong. Try to make another request.\nRestart RESTaurant if that doesn't work.");
         }
     }
 

src/main/java/com/rohitawate/restaurant/requestsmanager/POSTRequestManager.java

@@ -73,11 +73,17 @@ public class POSTRequestManager extends RequestManager {
 
                         String filePath;
                         File file;
+                        InputStream stream;
                         pairs = postRequest.getFileTuples();
                         for (Map.Entry entry : pairs.entrySet()) {
                             mapEntry = (Map.Entry) entry;
                             filePath = mapEntry.getValue();
                             file = new File(filePath);
+                            /*
+                                Creating a stream only because it throws
+                                FileNotFoundException if file doesn't exist.
+                             */
+                            stream = new FileInputStream(file);
                             formData.bodyPart(new FileDataBodyPart(mapEntry.getKey(),
                                     file, MediaType.APPLICATION_OCTET_STREAM_TYPE));
                         }
@@ -87,7 +93,7 @@ public class POSTRequestManager extends RequestManager {
                         invocation = requestBuilder.buildPost(Entity.entity(formData, MediaType.MULTIPART_FORM_DATA_TYPE));
                         break;
                     case MediaType.APPLICATION_OCTET_STREAM:
-                        InputStream stream = new FileInputStream(postRequest.getBody());
+                        stream = new FileInputStream(postRequest.getBody());
                         invocation = requestBuilder.buildPost(Entity.entity(stream, MediaType.APPLICATION_OCTET_STREAM_TYPE));
                         break;
                     case MediaType.APPLICATION_FORM_URLENCODED:

src/main/resources/css/Default.css

@@ -66,6 +66,10 @@
     -fx-background-color: #273154;
 }
 
+#errorLayer {
+    -fx-background-color: #822f2f;
+}
+
 #cancelButton {
     -fx-background-color: black;
 }

src/main/resources/fxml/dashboard/Dashboard.fxml

@@ -264,6 +264,28 @@
                                                      </Label>
                                                  </children>
                                              </VBox>
+                                             <VBox fx:id="errorLayer" alignment="CENTER" layoutX="10.0" layoutY="10.0"
+                                                   prefHeight="200.0" prefWidth="100.0" visible="false">
+                                                 <children>
+                                                     <ImageView fitHeight="100.0" fitWidth="100.0" opacity="0.75"
+                                                                pickOnBounds="true" preserveRatio="true">
+                                                         <image>
+                                                             <Image url="@../../assets/Explosion.png"/>
+                                                         </image>
+                                                     </ImageView>
+                                                     <Label fx:id="errorTitle" text="Error title" textFill="WHITE">
+                                                         <font>
+                                                             <Font name="System Bold" size="32.0"/>
+                                                         </font>
+                                                     </Label>
+                                                     <Label fx:id="errorDetails" text="Error details"
+                                                            textAlignment="CENTER" textFill="#c3c3c3">
+                                                         <font>
+                                                             <Font size="22.0"/>
+                                                         </font>
+                                                     </Label>
+                                                 </children>
+                                             </VBox>
                                          </children>
                                      </StackPane>
                                  </children>

src/main/resources/fxml/dashboard/HeaderTab.fxml

@@ -46,10 +46,10 @@
                 </JFXButton>
             </children>
             <padding>
-                <Insets bottom="10.0" left="25.0" right="10.0" top="15.0"/>
+                <Insets bottom="15.0" left="15.0" right="15.0" top="15.0"/>
             </padding>
         </HBox>
-        <ScrollPane fitToHeight="true" fitToWidth="true" hbarPolicy="NEVER" vbarPolicy="ALWAYS" VBox.vgrow="ALWAYS">
+        <ScrollPane fitToHeight="true" fitToWidth="true" hbarPolicy="NEVER" VBox.vgrow="ALWAYS">
             <content>
                 <VBox fx:id="headersBox" alignment="TOP_CENTER"/>
             </content>

src/main/resources/fxml/dashboard/URLTab.fxml

@@ -25,7 +25,7 @@
 <VBox stylesheets="@../../css/Default.css" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1"
       fx:controller="com.rohitawate.restaurant.dashboard.URLTabController">
     <children>
-        <HBox alignment="CENTER" VBox.vgrow="ALWAYS">
+        <HBox alignment="CENTER" VBox.vgrow="NEVER">
             <VBox.margin>
                 <Insets/>
             </VBox.margin>