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/AccountBean.java     | 70 ++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 Master/Reference Architectures and Patterns/EJB 3.0 Code/Gerald Examples/src/examples/entity/intro/AccountBean.java

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

diff --git a/Master/Reference Architectures and Patterns/EJB 3.0 Code/Gerald Examples/src/examples/entity/intro/AccountBean.java b/Master/Reference Architectures and Patterns/EJB 3.0 Code/Gerald Examples/src/examples/entity/intro/AccountBean.java
new file mode 100644
index 0000000..45f05c3
--- /dev/null
+++ b/Master/Reference Architectures and Patterns/EJB 3.0 Code/Gerald Examples/src/examples/entity/intro/AccountBean.java	
@@ -0,0 +1,70 @@
+package examples.entity.intro;
+
+import javax.ejb.Interceptors;
+import javax.ejb.Remote;
+import javax.ejb.Stateful;
+import javax.ejb.TransactionAttribute;
+import javax.ejb.TransactionAttributeType;
+import javax.persistence.EntityListener;
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+import javax.persistence.PersistenceContextType;
+
+/**
+ * Stateful session bean facade for account entities, remotely accessible
+ */
+
+@Stateful
+@Remote(AccountInterface.class)
+public class AccountBean implements AccountInterface { 
+    
+    /** The entity manager, injected by the container */
+    @PersistenceContext(type=PersistenceContextType.EXTENDED)    
+    private EntityManager manager;
+    
+    private Account account;
+    
+    @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)    
+    public void open(int accountNumber) {
+        account = manager.find(Account.class, accountNumber);
+        if(account == null)
+            account = new Account();
+        
+        account.ownerName = "anonymous";
+        account.accountNumber = accountNumber;
+        manager.persist(account);
+    }    
+    
+    @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)    
+	public int getBalance() {
+        if(account==null)
+            throw new IllegalStateException();
+        return account.balance;
+    }
+        
+    @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)
+    public void deposit(int amount) {
+        if(account==null)
+            throw new IllegalStateException();
+        //manager = emf.createEntityManager(PersistenceContextType.EXTENDED);
+        //account = manager.merge(account);
+        account.balance += amount;
+        //manager.flush();
+    }
+
+    @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)    
+    public int withdraw(int amount) {        
+        if(account==null)
+            throw new IllegalStateException();
+        // manager.lock(account, LockMode.WRITE);
+        if (amount > account.balance) {
+            return 0;
+        } else {
+            account.balance -= amount;
+            return amount;
+        }
+    }
+   
+
+    
+}
-- 
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