SEC-2194: Add Java Config samples

samples/tutorial-xml/src/main/java/bigbank/Account.java

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+package bigbank;
+
+/**
+ * Note this class does not represent best practice, as we are failing to
+ * encapsulate business logic (methods) and state in the domain object.
+ * Nevertheless, this demo is intended to reflect what people usually do,
+ * as opposed to what they ideally would be doing.
+ *
+ * @author Ben Alex
+ */
+public class Account {
+    private long id = -1;
+    private String holder;
+    private double balance;
+    private double overdraft = 100.00;
+
+    public Account(String holder) {
+        this.holder = holder;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getHolder() {
+        return holder;
+    }
+
+    public void setHolder(String holder) {
+        this.holder = holder;
+    }
+
+    public double getBalance() {
+        return balance;
+    }
+
+    public void setBalance(double balance) {
+        this.balance = balance;
+    }
+
+    public double getOverdraft() {
+        return overdraft;
+    }
+
+    public void setOverdraft(double overdraft) {
+        this.overdraft = overdraft;
+    }
+
+    public String toString() {
+        return "Account[id=" + id + ",balance=" + balance +",holder=" + holder + ", overdraft=" + overdraft + "]";
+    }
+}

samples/tutorial-xml/src/main/java/bigbank/BankDao.java

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+package bigbank;
+
+public interface BankDao {
+    public Account readAccount(Long id);
+    public void createOrUpdateAccount(Account account);
+    public Account[] findAccounts();
+}

samples/tutorial-xml/src/main/java/bigbank/BankDaoStub.java

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+package bigbank;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class BankDaoStub implements BankDao {
+    private long id = 0;
+    private final Map<Long, Account> accounts = new HashMap<Long, Account>();
+
+    public void createOrUpdateAccount(Account account) {
+        if (account.getId() == -1) {
+            id++;
+            account.setId(id);
+        }
+        accounts.put(new Long(account.getId()), account);
+        System.out.println("SAVE: " + account);
+    }
+
+    public Account[] findAccounts() {
+        Account[] accounts = this.accounts.values().toArray(new Account[] {});
+        System.out.println("Returning " + accounts.length + " account(s):");
+        for (Account account : accounts) {
+            System.out.println(" > " + account);
+        }
+        return accounts;
+    }
+
+    public Account readAccount(Long id) {
+        return accounts.get(id);
+    }
+
+}

samples/tutorial-xml/src/main/java/bigbank/BankService.java

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+package bigbank;
+
+import org.springframework.security.access.prepost.PreAuthorize;
+
+
+public interface BankService {
+
+    public Account readAccount(Long id);
+
+    public Account[] findAccounts();
+
+    @PreAuthorize(
+            "hasRole('supervisor') or " +
+            "hasRole('teller') and (#account.balance + #amount >= -#account.overdraft)" )
+    public Account post(Account account, double amount);
+}

samples/tutorial-xml/src/main/java/bigbank/BankServiceImpl.java

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+package bigbank;
+
+import org.springframework.util.Assert;
+
+public class BankServiceImpl implements BankService {
+    private final BankDao bankDao;
+
+    public BankServiceImpl(BankDao bankDao) {
+        Assert.notNull(bankDao);
+        this.bankDao = bankDao;
+    }
+
+    public Account[] findAccounts() {
+        return this.bankDao.findAccounts();
+    }
+
+    public Account post(Account account, double amount) {
+        Assert.notNull(account);
+
+        // We read account back from DAO so it reflects the latest balance
+        Account a = bankDao.readAccount(account.getId());
+        if (a == null) {
+            throw new IllegalArgumentException("Couldn't find requested account");
+        }
+
+        a.setBalance(a.getBalance() + amount);
+        bankDao.createOrUpdateAccount(a);
+        return a;
+    }
+
+    public Account readAccount(Long id) {
+        return bankDao.readAccount(id);
+    }
+}

samples/tutorial-xml/src/main/java/bigbank/SeedData.java

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+package bigbank;
+
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.util.Assert;
+
+public class SeedData implements InitializingBean{
+    private BankDao bankDao;
+
+    public void afterPropertiesSet() throws Exception {
+        Assert.notNull(bankDao);
+        bankDao.createOrUpdateAccount(new Account("rod"));
+        bankDao.createOrUpdateAccount(new Account("dianne"));
+        bankDao.createOrUpdateAccount(new Account("scott"));
+        bankDao.createOrUpdateAccount(new Account("peter"));
+    }
+
+    public void setBankDao(BankDao bankDao) {
+        this.bankDao = bankDao;
+    }
+
+}

samples/tutorial-xml/src/main/java/bigbank/web/ListAccounts.java

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+package bigbank.web;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.springframework.util.Assert;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.mvc.Controller;
+
+import bigbank.BankService;
+
+public class ListAccounts implements Controller {
+
+    private final BankService bankService;
+
+    public ListAccounts(BankService bankService) {
+        Assert.notNull(bankService);
+        this.bankService = bankService;
+    }
+
+    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
+        // Security check (this is unnecessary if Spring Security is performing the authorization)
+//        if (request.getUserPrincipal() == null) {
+//            throw new AuthenticationCredentialsNotFoundException("You must login to view the account list (Spring Security message)"); // only for Spring Security managed authentication
+//        }
+
+        // Actual business logic
+        ModelAndView mav = new ModelAndView("listAccounts");
+        mav.addObject("accounts", bankService.findAccounts());
+        return mav;
+    }
+
+}

samples/tutorial-xml/src/main/java/bigbank/web/PostAccounts.java

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+package bigbank.web;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.springframework.util.Assert;
+import org.springframework.web.bind.ServletRequestUtils;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.mvc.Controller;
+
+import bigbank.Account;
+import bigbank.BankService;
+
+public class PostAccounts implements Controller {
+
+    private final BankService bankService;
+
+    public PostAccounts(BankService bankService) {
+        Assert.notNull(bankService);
+        this.bankService = bankService;
+    }
+
+    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
+        // Security check (this is unnecessary if Spring Security is performing the authorization)
+//        if (!request.isUserInRole("ROLE_TELLER")) {
+//            throw new AccessDeniedException("You must be a teller to post transactions (Spring Security message)");
+//        }
+
+        // Actual business logic
+        Long id = ServletRequestUtils.getRequiredLongParameter(request, "id");
+        Double amount = ServletRequestUtils.getRequiredDoubleParameter(request, "amount");
+        Account a = bankService.readAccount(id);
+        bankService.post(a, amount);
+
+        return new ModelAndView("redirect:listAccounts.html");
+    }
+
+}