From 4afcff940551079617e8f4116e52bb0ef9df7fcc Mon Sep 17 00:00:00 2001
From: Kamal Wickramanayake <kamal@inbox.lk>
Date: Sat, 25 Apr 2026 21:53:33 +0530
Subject: Added Spring Framework sample code

---
 .../main/java/com/example/fp/tx/TxUserManager.java | 88 ++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 spring-framework/07-user-jdbc-ds-transaction/src/main/java/com/example/fp/tx/TxUserManager.java

(limited to 'spring-framework/07-user-jdbc-ds-transaction/src/main/java/com/example/fp/tx')

diff --git a/spring-framework/07-user-jdbc-ds-transaction/src/main/java/com/example/fp/tx/TxUserManager.java b/spring-framework/07-user-jdbc-ds-transaction/src/main/java/com/example/fp/tx/TxUserManager.java
new file mode 100644
index 0000000..4bb6d05
--- /dev/null
+++ b/spring-framework/07-user-jdbc-ds-transaction/src/main/java/com/example/fp/tx/TxUserManager.java
@@ -0,0 +1,88 @@
+package com.example.fp.tx;
+
+import java.util.List;
+
+import org.springframework.jdbc.datasource.DataSourceTransactionManager;
+import org.springframework.transaction.TransactionStatus;
+import org.springframework.transaction.support.TransactionCallbackWithoutResult;
+import org.springframework.transaction.support.TransactionTemplate;
+
+import com.example.fp.User;
+import com.example.fp.UserManager;
+
+/**
+ * This class decorates a given AccountManager by adding transaction boundaries.
+ * 
+ * @author kamal
+ *
+ */
+public class TxUserManager implements UserManager {
+
+	private UserManager userManager;
+
+	public void setUserManager(UserManager userManager) {
+		this.userManager = userManager;
+	}
+
+	private TransactionTemplate txTemplate;
+
+	public void setTxManager(DataSourceTransactionManager txManager) {
+		txTemplate = new TransactionTemplate(txManager);
+	}
+
+	
+	@Override
+	public User find(int uid) {
+		return userManager.find(uid);
+	}
+
+
+	@Override
+	public void delete(int uid) {
+		txTemplate.execute(new TransactionCallbackWithoutResult() {
+
+			@Override
+			protected void doInTransactionWithoutResult(TransactionStatus arg0) {
+				userManager.delete(uid);
+			}
+		});
+	}
+
+	@Override
+	public void create(User user) {
+		txTemplate.execute(new TransactionCallbackWithoutResult() {
+
+			@Override
+			protected void doInTransactionWithoutResult(TransactionStatus arg0) {
+				userManager.create(user);
+			}
+		});		
+	}
+
+	@Override
+	public List<User> findAll() {
+		return userManager.findAll();
+	}
+
+	@Override
+	public void update(User user) {
+		txTemplate.execute(new TransactionCallbackWithoutResult() {
+
+			@Override
+			protected void doInTransactionWithoutResult(TransactionStatus arg0) {
+				userManager.update(user);
+			}
+		});
+	}
+
+	@Override
+	public void setPassword(int uid, String plainTextPassword) {
+		txTemplate.execute(new TransactionCallbackWithoutResult() {
+
+			@Override
+			protected void doInTransactionWithoutResult(TransactionStatus arg0) {
+				userManager.setPassword(uid, plainTextPassword);
+			}
+		});
+	}
+}
-- 
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