Added spring-boot sample applications

12 files changed, 339 insertions, 0 deletions

diff --git a/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/Application.java b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/Application.java
new file mode 100644
index 0000000..4393f3f
--- /dev/null
+++ b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/Application.java
@@ -0,0 +1,12 @@
+package com.example.spring;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+	public static void main(String[] args) throws Exception {
+		SpringApplication.run(Application.class, args);
+	}
+}
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diff --git a/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/account/Account.java b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/account/Account.java
new file mode 100644
index 0000000..b5fe811
--- /dev/null
+++ b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/account/Account.java
@@ -0,0 +1,53 @@
+package com.example.spring.bank.account;
+
+import java.math.BigDecimal;
+
+import com.example.spring.bank.customer.Customer;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+
+@Entity
+public class Account {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+	private Long accountNumber;
+    
+	private BigDecimal balance;
+	
+	public Account() {
+		super();
+	}
+
+	public Account(BigDecimal balance) {
+		super();
+		this.balance = balance;
+	}
+
+	@ManyToOne
+	private Customer customer;
+	
+	public Customer getCustomer() {
+		return customer;
+	}
+
+	public void setCustomer(Customer customer) {
+		this.customer = customer;
+	}
+
+	public Long getAccountNumber() {
+		return accountNumber;
+	}
+	public void setAccountNumber(Long accountNumber) {
+		this.accountNumber = accountNumber;
+	}
+	public BigDecimal getBalance() {
+		return balance;
+	}
+	public void setBalance(BigDecimal balance) {
+		this.balance = balance;
+	}
+}
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diff --git a/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/account/AccountController.java b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/account/AccountController.java
new file mode 100644
index 0000000..dc017dd
--- /dev/null
+++ b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/account/AccountController.java
@@ -0,0 +1,28 @@
+package com.example.spring.bank.account;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/account")
+public class AccountController {
+
+	@Autowired
+	private AccountManager accountManager;
+	
+	@GetMapping("/{accountNumber}")
+	public Account getAccount(@PathVariable Long accountNumber) {
+		// TODO: Check null returns.
+		Account account = accountManager.findByAccountNumber(accountNumber).get();
+		return account;
+	}
+	
+	@PostMapping("/")
+	public Account createAccount(Account account) {
+		return accountManager.create(account);
+	}
+}
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diff --git a/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/account/AccountManager.java b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/account/AccountManager.java
new file mode 100644
index 0000000..14dfa0c
--- /dev/null
+++ b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/account/AccountManager.java
@@ -0,0 +1,13 @@
+package com.example.spring.bank.account;
+
+import java.util.Optional;
+
+public interface AccountManager {
+
+	public Account create(Account account);
+	
+	public Optional<Account> findByAccountNumber(Long accountNumber);
+	public Iterable<Account> findAll();
+	
+	// Other methods
+}
diff --git a/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/account/AccountManagerImpl.java b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/account/AccountManagerImpl.java
new file mode 100644
index 0000000..2227469
--- /dev/null
+++ b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/account/AccountManagerImpl.java
@@ -0,0 +1,33 @@
+package com.example.spring.bank.account;
+
+import java.util.Optional;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import jakarta.transaction.Transactional;
+
+@Service
+public class AccountManagerImpl implements AccountManager {
+
+	@Autowired
+	private AccountRepository accountRepository;
+	
+	@Override
+	@Transactional
+	public Account create(Account account) {
+		return accountRepository.save(account);
+	}
+
+	@Override
+	public Optional<Account> findByAccountNumber(Long accountNumber) {
+		return accountRepository.findById(accountNumber);
+	}
+	
+	@Override
+	public Iterable<Account> findAll() {
+		return accountRepository.findAll();
+	}
+	
+	// Other methods
+}
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diff --git a/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/account/AccountRepository.java b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/account/AccountRepository.java
new file mode 100644
index 0000000..086f828
--- /dev/null
+++ b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/account/AccountRepository.java
@@ -0,0 +1,7 @@
+package com.example.spring.bank.account;
+
+import org.springframework.data.repository.ListCrudRepository;
+
+public interface AccountRepository extends ListCrudRepository<Account, Long> {
+	
+}
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diff --git a/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/customer/Customer.java b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/customer/Customer.java
new file mode 100644
index 0000000..43bf0a6
--- /dev/null
+++ b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/customer/Customer.java
@@ -0,0 +1,66 @@
+package com.example.spring.bank.customer;
+
+import java.util.List;
+
+import com.example.spring.bank.account.Account;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.OneToMany;
+
+
+
+@Entity
+public class Customer {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+	private Long id;
+    
+    private String name;
+
+	public Customer() {
+		super();
+	}
+
+	public Customer(String name) {
+		super();
+		this.name = name;
+	}
+
+	@OneToMany(mappedBy = "customer")
+//	@OneToMany
+	private List<Account> accounts;
+	
+	public List<Account> getAccounts() {
+		return accounts;
+	}
+
+	public void setAccounts(List<Account> accounts) {
+		this.accounts = accounts;
+	}
+
+	public Long getId() {
+		return id;
+	}
+
+	public void setId(Long id) {
+		this.id = id;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	@Override
+	public String toString() {
+		return "Customer [id=" + id + ", name=" + name + "]";
+	}
+	
+}
diff --git a/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/customer/CustomerManager.java b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/customer/CustomerManager.java
new file mode 100644
index 0000000..1560672
--- /dev/null
+++ b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/customer/CustomerManager.java
@@ -0,0 +1,17 @@
+package com.example.spring.bank.customer;
+
+import java.util.Optional;
+
+import com.example.spring.bank.account.Account;
+
+public interface CustomerManager {
+
+	public Customer create(Customer customer);
+	
+	public Optional<Customer> findById(Long customerId);
+	public Iterable<Customer> findAll();
+	
+	public void addAccount(Customer customer, Account account);
+	
+	// Other methods
+}
diff --git a/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/customer/CustomerManagerImpl.java b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/customer/CustomerManagerImpl.java
new file mode 100644
index 0000000..05b3fdc
--- /dev/null
+++ b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/customer/CustomerManagerImpl.java
@@ -0,0 +1,45 @@
+package com.example.spring.bank.customer;
+
+import java.util.Optional;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import com.example.spring.bank.account.Account;
+
+import jakarta.transaction.Transactional;
+
+@Service
+public class CustomerManagerImpl implements CustomerManager {
+
+	@Autowired
+	private CustomerRepository customerRepository;
+	
+	@Override
+	@Transactional
+	public Customer create(Customer customer) {
+		return customerRepository.save(customer);
+	}
+
+	@Override
+	public Optional<Customer> findById(Long customerId) {
+		return customerRepository.findById(customerId);
+	}
+	
+	@Override
+	public Iterable<Customer> findAll() {
+		return customerRepository.findAll();
+	}
+
+	@Transactional
+	@Override
+	public void addAccount(Customer customer, Account account) {
+		// May not work is the customer is detached.
+		//	customer.getAccounts().add(account);
+		
+		// Access the Customer again - so that it would not be a detached entity.
+		customerRepository.findById(customer.getId()).get().getAccounts().add(account);
+	}
+	
+	// Other methods
+}
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diff --git a/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/customer/CustomerRepository.java b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/customer/CustomerRepository.java
new file mode 100644
index 0000000..8695d66
--- /dev/null
+++ b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/customer/CustomerRepository.java
@@ -0,0 +1,7 @@
+package com.example.spring.bank.customer;
+
+import org.springframework.data.repository.ListCrudRepository;
+
+public interface CustomerRepository extends ListCrudRepository<Customer, Long> {
+	
+}
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diff --git a/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/dev/AppInit.java b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/dev/AppInit.java
new file mode 100644
index 0000000..03a60f9
--- /dev/null
+++ b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/bank/dev/AppInit.java
@@ -0,0 +1,44 @@
+package com.example.spring.bank.dev;
+
+import java.math.BigDecimal;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.stereotype.Component;
+
+import com.example.spring.bank.account.Account;
+import com.example.spring.bank.account.AccountManager;
+import com.example.spring.bank.customer.Customer;
+import com.example.spring.bank.customer.CustomerManager;
+
+@Component
+public class AppInit implements CommandLineRunner {
+	
+	@Autowired
+	private AccountManager accountManager;
+	
+	@Autowired
+	private CustomerManager customerManager;
+	
+	@Value("${bankapp.init-testdata}")
+	private boolean initTestData;
+	
+	@Override
+	public void run(String... args) throws Exception {
+		// Create test accounts.
+		if (initTestData) {
+			Account acc1 = accountManager.create(new Account(new BigDecimal("0.00")));
+			Account acc2 = accountManager.create(new Account(new BigDecimal("0.00")));
+			
+			Customer c1 = customerManager.create(new Customer("Madushi"));
+			Customer c2 = customerManager.create(new Customer("Anuradha"));
+			
+			Customer customerSamitha = customerManager.create(new Customer("Samitha"));
+			Account accountSamitha = accountManager.create(new Account(new BigDecimal("0.00")));
+			
+			customerManager.addAccount(customerSamitha, accountSamitha);
+		}
+	}
+	
+}
diff --git a/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/hello/HelloController.java b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/hello/HelloController.java
new file mode 100644
index 0000000..bb287ba
--- /dev/null
+++ b/spring-boot/04-bank-jpa-rest/src/main/java/com/example/spring/hello/HelloController.java
@@ -0,0 +1,14 @@
+package com.example.spring.hello;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+@Controller
+public class HelloController {	
+	@RequestMapping("/")
+	@ResponseBody
+	String home() {
+		return "App is running! Access http://host:port/account/{accountNumber}";
+	}
+}
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