Task 10 completed: Hierarchical error handling with layered services

.idea/.gitignore

+# Default ignored files
+/shelf/
+/workspace.xml

.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="ms-17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file

.idea/modules.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/CustomException.iml" filepath="$PROJECT_DIR$/CustomException.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file

.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

CustomException.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file

src/BusinessServiceLayer.java

+public class BusinessServiceLayer {
+    private DataAccessLayer dal = new DataAccessLayer();
+
+    public void processBusinessLogic() throws CustomException {
+        System.out.println("Business logic started...");
+        dal.fetchData(); // Exception will bubble up from here
+        System.out.println("Business logic completed.");
+    }
+}

src/ControllerLayer.java

+public class ControllerLayer {
+    private BusinessServiceLayer service = new BusinessServiceLayer();
+
+    public void handleRequest() throws CustomException {
+        System.out.println("Request received by controller...");
+        service.processBusinessLogic(); // Exception may bubble up to here
+        System.out.println("Response sent successfully.");
+    }
+}

src/CustomException.java

+public class CustomException extends Exception {
+    public CustomException(String message) {
+        super(message);
+    }
+}

src/DataAccessLayer.java

+public class DataAccessLayer {
+    public void fetchData() throws CustomException {
+        // Simulate failure
+        throw new CustomException("Database connection failed");
+    }
+}

src/Main.java

 public class Main {
+<<<<<<< HEAD
     public static void processPaymentMethod(String method, String offer) {
         PaymentService paymentService = new PaymentService();
 
@@ -20,4 +21,15 @@ public class Main {
         processPaymentMethod("card", "UPI10");     // invalid offer for card
         processPaymentMethod("upi", "UPI10");      // valid
     }
+=======
+    public static void main(String[] args) {
+        ControllerLayer controller = new ControllerLayer();
+
+        try {
+            controller.handleRequest();
+        } catch (CustomException e) {
+            System.err.println("Error handled in Main: " + e.getMessage());
+        }
+    }
+>>>>>>> 6db3119 (Add Task 10: Hierarchical error handling implementation)
 }