ehmjamiu/todoapp

Purpose and Runtime

This is a Java server-rendered todo application. It runs as a Servlet/JSP web application, with Maven as the Java build system and an additional Node package manifest present. Deployment and servlet routing are defined in src/main/webapp/WEB-INF/web.xml.

Application Entry Points

The operational entry points are HTTP servlet endpoints:

• Authentication/session lifecycle: src/main/java/servlets/LoginServlet.java, src/main/java/servlets/LogoutServlet.java

• Task commands: src/main/java/servlets/AddTaskServlet.java, src/main/java/servlets/ChangeStatusServlet.java, src/main/java/servlets/DeleteTaskServlet.java

• Task viewing: src/main/java/servlets/ViewTaskServlet.java

src/main/java/com/example/todoapp/HelloApplication.java and src/main/java/com/example/todoapp/HelloResource.java suggest a separate Jakarta/REST-style scaffold, but the servlet/JSP stack is the primary application structure indicated by the repository.

Web and Presentation Layer

JSPs render pages and forms:

• Landing/login UI: src/main/webapp/index.jsp, src/main/webapp/login.jsp

• Task creation and list views: src/main/webapp/addTask.jsp, src/main/webapp/taskList.jsp

Servlets form the controller boundary: they receive browser requests, manage request/session state, invoke persistence operations, then forward or redirect to JSP views. src/main/webapp/WEB-INF/web.xml is the central container-facing configuration boundary.

Domain Model

Task state is represented by:

• src/main/java/model/Task.java

• src/main/java/model/TaskStatus.java

Task is the persistence and UI transfer object; TaskStatus constrains lifecycle/status values. Status changes flow from ChangeStatusServlet through the DAO to the database, then back to the task-list presentation.

Persistence Boundary

src/main/java/dao/TaskDAO.java centralizes database access for task retrieval and mutations. It is the key separation between HTTP/controller code and SQL/JDBC operations.

src/main/java/util/DBConnection.java owns database connection creation/configuration. The repository includes console.sql, likely supporting schema setup or manual database inspection. Database credentials, transaction handling, and connection lifecycle are therefore important operational concerns.

Primary Flow

1. A user authenticates through LoginServlet; logout is handled by LogoutServlet.

2. Authenticated browser requests invoke task servlets.

3. Task servlets map submitted parameters to Task/TaskStatus.

4. TaskDAO reads or modifies records via DBConnection.

5. The controller forwards/redirects to JSP pages, especially taskList.jsp, to display current task state.

Infrastructure and Integration Boundaries

The application depends on a Java Servlet container with JSP support, JDBC-compatible database access, and Maven dependencies declared by pom.xml. CDI metadata exists at src/main/resources/META-INF/beans.xml, though its practical role is unclear from the tree. package.json and package-lock.json indicate possible frontend/package tooling, but no client source tree is present.