Adding Code for BAEL-394 (#1163)

* Code for evaluation article Article : Field vs. Constructor Injection * Correct typo in attribute name * Delete EbookRepositiry.java * Add corrected class * Update LibraryUtils.java * Update Member.java * Update Reservation.java * Adding new file AccountServlet * Adding new files for BAEL-394 * Add new files for BAEL-394 * Add new file for BAEL-394 * Indentation of annotations fixed * Indentation of annotations fixed * Indentation of annotations fixed * Removing this class since it is not relevant * New example added for @WebListener
2017-02-20 05:24:42 +05:30
parent e5ecd86f27
commit 7c337eb6c0
13 changed files with 265 additions and 0 deletions
@@ -0,0 +1,57 @@
+package com.baeldung.javaeeannotations;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+
+import javax.servlet.ServletConfig;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.HttpConstraint;
+import javax.servlet.annotation.HttpMethodConstraint;
+import javax.servlet.annotation.ServletSecurity;
+import javax.servlet.annotation.WebInitParam;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+@WebServlet(
+  name = "BankAccountServlet", 
+  description = "Represents a Bank Account and it's transactions", 
+  urlPatterns = {"/account", "/bankAccount" }, 
+  initParams = { @WebInitParam(name = "type", value = "savings") }
+  )
+@ServletSecurity(
+  value = @HttpConstraint(rolesAllowed = {"admin"}),
+  httpMethodConstraints = {@HttpMethodConstraint(value = "POST", rolesAllowed = {"admin"})}
+  )
+public class AccountServlet extends javax.servlet.http.HttpServlet {
+
+    String accountType = null;
+
+    @Override
+    public void init(ServletConfig config) throws ServletException {
+        accountType = config.getInitParameter("type");
+    }
+
+    public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
+        PrintWriter writer = response.getWriter();
+        writer.println("<html>Hello, I am an AccountServlet!</html>");
+        writer.flush();
+    }
+
+    public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
+        double accountBalance = 1000d;
+        double interestRate = Double.parseDouble(request.getAttribute("interest").toString());
+
+        String paramDepositAmt = request.getParameter("dep");
+        double depositAmt = Double.parseDouble(paramDepositAmt);
+
+        accountBalance = accountBalance + depositAmt;
+
+        PrintWriter writer = response.getWriter();
+        writer.println("<html> Balance of " + accountType + " account is: " + 
+           accountBalance + "<br> This account bares an interest rate of " + interestRate + 
+           " % </html>");
+        writer.flush();
+
+    }
+}