From 33613a85afc4b1481367fbe92a17ee59c240250b Mon Sep 17 00:00:00 2001
From: Sven Eisenhauer <sven@sven-eisenhauer.net>
Date: Fri, 10 Nov 2023 15:11:48 +0100
Subject: add new repo

---
 .../src/examples/entity/intro/BankBean.java        | 119 +++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 Master/Reference Architectures and Patterns/EJB 3.0 Code/Gerald Examples/src/examples/entity/intro/BankBean.java

(limited to 'Master/Reference Architectures and Patterns/EJB 3.0 Code/Gerald Examples/src/examples/entity/intro/BankBean.java')

diff --git a/Master/Reference Architectures and Patterns/EJB 3.0 Code/Gerald Examples/src/examples/entity/intro/BankBean.java b/Master/Reference Architectures and Patterns/EJB 3.0 Code/Gerald Examples/src/examples/entity/intro/BankBean.java
new file mode 100644
index 0000000..de5e59a
--- /dev/null
+++ b/Master/Reference Architectures and Patterns/EJB 3.0 Code/Gerald Examples/src/examples/entity/intro/BankBean.java	
@@ -0,0 +1,119 @@
+package examples.entity.intro;
+
+import java.util.List;
+
+import javax.ejb.Stateless;
+import javax.ejb.Remote;
+import javax.persistence.*;
+
+/**
+ * Stateless session bean facade for account entities, remotely accessible
+ */
+@Stateless
+@Remote(Bank.class)
+@EntityListener(MyListener.class)
+public class BankBean implements Bank { 
+    /**
+     * The entity manager object, injected by the container
+     */
+    @PersistenceContext
+    private EntityManager manager;
+    
+    public List<Account> listAccounts() {
+        //Query query = manager.createQuery("SELECT a FROM Account a");
+        Query query = manager.createNamedQuery("findThem");
+        return query.getResultList();
+    }
+    
+    public void printBigAccounts() {
+        Query query = 
+            manager.createQuery("SELECT a FROM Account a WHERE a.balance > 1000");
+        
+        System.out.println("Got " + query.getResultList().size() + " records.");
+        
+        // do sth else in the meantime
+        try {
+            Thread.sleep(15000);
+        } catch (InterruptedException e )
+        {}
+        
+        query = 
+            manager.createQuery("SELECT a FROM Account a WHERE a.balance > 1000");
+        
+        System.out.println("Got " + query.getResultList().size() + " records.");
+    }
+
+    
+    public Account openAccount(String ownerName) {
+        Account account = new Account();
+        account.ownerName = ownerName;
+        System.out.println("Entity belongs to persistence context: " +
+                manager.contains(account));
+        manager.persist(account);
+        System.out.println("Entity belongs to persistence context: " +
+                manager.contains(account));
+        return account;
+    }
+    
+    public Account openAccount(String ownerName, int accNum) {
+        Account account = new Account();
+        account.ownerName = ownerName;
+        account.accountNumber = accNum;
+        System.out.println("Entity belongs to persistence context: " +
+                manager.contains(account));
+        manager.persist(account);
+        System.out.println("Entity belongs to persistence context: " +
+                manager.contains(account));
+        return account;
+    }
+    
+	public int getBalance(int accountNumber) {
+        Account account = manager.find(Account.class, accountNumber);
+        return account.balance;
+    }
+    
+    public void deposit(int accountNumber, int amount) {
+        Account account = manager.find(Account.class, accountNumber);
+        account.balance += amount;
+    }
+    
+    public int withdraw(int accountNumber, int amount) {
+        Account account = manager.find(Account.class, accountNumber);
+        System.out.println("Withdrawing... " );
+        
+        account.balance -= amount;
+        System.out.println("... amount now... " + account.balance );
+        manager.flush();
+        return amount;
+    }
+    
+    public void close(int accountNumber) {
+        Account account = manager.find(Account.class, accountNumber);
+        try {
+            Thread.sleep(20000);
+        } catch (InterruptedException e )
+        {}        
+        manager.remove(account);
+        try {
+            Thread.sleep(20000);
+        } catch (InterruptedException e )
+        {}
+    }
+    
+    public void update(Account a) {
+        manager.merge(a);
+    }
+    
+    public void checkBalance(int accountNumber) {
+        System.out.println("Checking... sleep");
+        try {
+            Thread.sleep(3000);
+        } catch (InterruptedException e )
+        {}
+        Account account = manager.find(Account.class, accountNumber);
+        manager.refresh(account);
+        int b = account.balance;
+        System.out.println("Checking... " + b );
+    }
+    
+}
-- 
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