From b1d598a2f02819bc127d0d3522dc7ac91b4dee65 Mon Sep 17 00:00:00 2001
From: Kamal Wickramanayake <kamal@inbox.lk>
Date: Sun, 10 May 2026 14:23:46 +0530
Subject: Added Spring sample application related to structure

---
 .../spring-task-manager-structure/.gitignore       |  9 +++++
 .../spring-task-manager-structure/pom.xml          | 42 ++++++++++++++++++++++
 .../src/main/java/com/example/spring/App.java      | 11 ++++++
 .../main/java/com/example/spring/task/Task.java    |  5 +++
 .../java/com/example/spring/task/TaskManager.java  | 11 ++++++
 .../com/example/spring/task/TaskManagerApp.java    | 20 +++++++++++
 .../com/example/spring/task/TaskManagerImpl.java   | 20 +++++++++++
 .../main/java/com/example/spring/task/TextUI.java  | 18 ++++++++++
 .../java/com/example/spring/task/dao/TaskDAO.java  | 10 ++++++
 .../example/spring/task/dao/jdbc/JDBCTaskDAO.java  | 35 ++++++++++++++++++
 .../META-INF/spring/applicationContext.xml         | 34 ++++++++++++++++++
 .../main/resources/META-INF/spring/jdbc.properties |  9 +++++
 12 files changed, 224 insertions(+)
 create mode 100644 spring-framework/spring-task-manager-structure/.gitignore
 create mode 100644 spring-framework/spring-task-manager-structure/pom.xml
 create mode 100644 spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/App.java
 create mode 100644 spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/Task.java
 create mode 100644 spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/TaskManager.java
 create mode 100644 spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/TaskManagerApp.java
 create mode 100644 spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/TaskManagerImpl.java
 create mode 100644 spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/TextUI.java
 create mode 100644 spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/dao/TaskDAO.java
 create mode 100644 spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/dao/jdbc/JDBCTaskDAO.java
 create mode 100644 spring-framework/spring-task-manager-structure/src/main/resources/META-INF/spring/applicationContext.xml
 create mode 100644 spring-framework/spring-task-manager-structure/src/main/resources/META-INF/spring/jdbc.properties

(limited to 'spring-framework')

diff --git a/spring-framework/spring-task-manager-structure/.gitignore b/spring-framework/spring-task-manager-structure/.gitignore
new file mode 100644
index 0000000..ec4e05e
--- /dev/null
+++ b/spring-framework/spring-task-manager-structure/.gitignore
@@ -0,0 +1,9 @@
+# Eclipse
+bin
+.settings
+.metadata
+.classpath
+.project
+
+# Maven
+target
diff --git a/spring-framework/spring-task-manager-structure/pom.xml b/spring-framework/spring-task-manager-structure/pom.xml
new file mode 100644
index 0000000..6a3307d
--- /dev/null
+++ b/spring-framework/spring-task-manager-structure/pom.xml
@@ -0,0 +1,42 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>com.example.spring</groupId>
+		<artifactId>base-config</artifactId>
+		<version>0.0.1-SNAPSHOT</version>
+		<relativePath>../00-config</relativePath>
+	</parent>
+
+	<artifactId>bank-jdbc-ds-transaction</artifactId>
+	<packaging>jar</packaging>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-jdbc</artifactId>
+			<version>${springVersion}</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-dbcp2</artifactId>
+			<version>${commonsDBCP2Version}</version>
+			<exclusions>
+				<exclusion>
+					<groupId>commons-logging</groupId>
+					<artifactId>commons-logging</artifactId>
+				</exclusion>
+			</exclusions>
+		</dependency>
+
+		<dependency>
+			<groupId>org.mariadb.jdbc</groupId>
+			<artifactId>mariadb-java-client</artifactId>
+			<version>${mariadbClientVersion}</version>
+		</dependency>
+	</dependencies>
+
+</project>
diff --git a/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/App.java b/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/App.java
new file mode 100644
index 0000000..0df54bc
--- /dev/null
+++ b/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/App.java
@@ -0,0 +1,11 @@
+package com.example.spring;
+
+import com.example.spring.task.TaskManagerApp;
+
+public class App {
+	public static void main(String[] args) {
+		// Actually, BankApp is the class with the main method.
+		// It should have been executed directly instead of this class.
+		TaskManagerApp.main(args);
+	}
+}
diff --git a/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/Task.java b/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/Task.java
new file mode 100644
index 0000000..9d112f7
--- /dev/null
+++ b/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/Task.java
@@ -0,0 +1,5 @@
+package com.example.spring.task;
+
+public class Task {
+
+}
diff --git a/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/TaskManager.java b/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/TaskManager.java
new file mode 100644
index 0000000..9e4cbf4
--- /dev/null
+++ b/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/TaskManager.java
@@ -0,0 +1,11 @@
+package com.example.spring.task;
+
+/**
+ * Business logic operations.
+ * Only method signatures are defined.
+ */
+public interface TaskManager {
+    // Method signatures
+    public void create(Task task);
+
+}
diff --git a/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/TaskManagerApp.java b/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/TaskManagerApp.java
new file mode 100644
index 0000000..0e2c65d
--- /dev/null
+++ b/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/TaskManagerApp.java
@@ -0,0 +1,20 @@
+package com.example.spring.task;
+
+import org.springframework.context.support.AbstractApplicationContext;
+import org.springframework.context.support.ClassPathXmlApplicationContext;
+
+public class TaskManagerApp {
+
+	/**
+	 * @param args
+	 */
+	public static void main(String[] args) {
+		
+		AbstractApplicationContext ctx = new ClassPathXmlApplicationContext(new String[] {"classpath:META-INF/spring/applicationContext.xml"});
+
+		TextUI ui = ctx.getBean("textUI", TextUI.class);
+	
+		ui.start();
+	}
+
+}
diff --git a/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/TaskManagerImpl.java b/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/TaskManagerImpl.java
new file mode 100644
index 0000000..46ca02e
--- /dev/null
+++ b/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/TaskManagerImpl.java
@@ -0,0 +1,20 @@
+package com.example.spring.task;
+
+import com.example.spring.task.dao.TaskDAO;
+
+public class TaskManagerImpl implements TaskManager {
+
+    private TaskDAO taskDAO;
+
+    public void setTaskDAO(TaskDAO taskDAO) {
+        this.taskDAO = taskDAO;
+    }
+    
+    @Override
+    public void create(Task task) {
+        // Actual business logic related to creating a task
+        // ..
+        Task newTask = taskDAO.create(task);
+        // ...
+    }
+}
diff --git a/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/TextUI.java b/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/TextUI.java
new file mode 100644
index 0000000..7b4676f
--- /dev/null
+++ b/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/TextUI.java
@@ -0,0 +1,18 @@
+package com.example.spring.task;
+
+public class TextUI {
+
+    private TaskManager taskManager;
+
+    public void setTaskManager(TaskManager taskManager) {
+        this.taskManager = taskManager;
+    }
+
+    public void start() {
+        System.out.println("Starting TextUI...");
+        //..
+        Task t = new Task();
+        taskManager.create(t);
+        //..
+    }
+}
diff --git a/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/dao/TaskDAO.java b/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/dao/TaskDAO.java
new file mode 100644
index 0000000..3f5ad2b
--- /dev/null
+++ b/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/dao/TaskDAO.java
@@ -0,0 +1,10 @@
+package com.example.spring.task.dao;
+
+import com.example.spring.task.Task;
+
+/**
+ * Provide an object view of a data store
+ */
+public interface TaskDAO {
+    public Task create(Task task);
+}
diff --git a/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/dao/jdbc/JDBCTaskDAO.java b/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/dao/jdbc/JDBCTaskDAO.java
new file mode 100644
index 0000000..37ced85
--- /dev/null
+++ b/spring-framework/spring-task-manager-structure/src/main/java/com/example/spring/task/dao/jdbc/JDBCTaskDAO.java
@@ -0,0 +1,35 @@
+package com.example.spring.task.dao.jdbc;
+
+import java.sql.Connection;
+
+import javax.sql.DataSource;
+
+import com.example.spring.task.Task;
+import com.example.spring.task.dao.TaskDAO;
+
+/**
+ * Use JDBC API to interact with a DB
+ */
+public class JDBCTaskDAO implements TaskDAO {
+
+    private DataSource dataSource;
+
+    public void setDataSource(DataSource dataSource) {
+        this.dataSource = dataSource;
+    }
+
+    @Override
+    public Task create(Task task) {
+        // Use a DB connection
+        // Connection conn = dataSource.getConnection();
+        
+        // Perform an insert
+        // Return a Task object with ID set
+        
+        System.out.println("JDBCTaskDAO: inserting a record to DB.");
+        //task.setId(dbTaskId);
+        
+        return task; 
+    }
+
+}
diff --git a/spring-framework/spring-task-manager-structure/src/main/resources/META-INF/spring/applicationContext.xml b/spring-framework/spring-task-manager-structure/src/main/resources/META-INF/spring/applicationContext.xml
new file mode 100644
index 0000000..abea0c7
--- /dev/null
+++ b/spring-framework/spring-task-manager-structure/src/main/resources/META-INF/spring/applicationContext.xml
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns:jdbc="http://www.springframework.org/schema/jdbc"
+	xmlns:context="http://www.springframework.org/schema/context"
+	xsi:schemaLocation="http://www.springframework.org/schema/beans
+	http://www.springframework.org/schema/beans/spring-beans.xsd
+	http://www.springframework.org/schema/jdbc
+	http://www.springframework.org/schema/jdbc/spring-jdbc.xsd
+	http://www.springframework.org/schema/context
+    http://www.springframework.org/schema/context/spring-context.xsd">
+
+    <context:property-placeholder location="classpath:META-INF/spring/jdbc.properties"/>
+        
+	<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource" destroy-method="close" >
+        <property name="driverClassName" value="${jdbc.driverClassName}"/>
+        <property name="url" value="${jdbc.url}"/>
+        <property name="username" value="${jdbc.username}"/>
+        <property name="password" value="${jdbc.password}"/>
+    </bean>
+    
+    <bean id="taskDAO" class="com.example.spring.task.dao.jdbc.JDBCTaskDAO">
+        <property name="dataSource" ref="dataSource"/>
+    </bean>
+    	
+	<bean id="taskManager" class="com.example.spring.task.TaskManagerImpl">
+		<property name="taskDAO" ref="taskDAO"/>
+	</bean>
+	
+	<bean id="textUI" class="com.example.spring.task.TextUI">
+		<property name="taskManager" ref="taskManager"/>
+	</bean>
+	
+</beans>
\ No newline at end of file
diff --git a/spring-framework/spring-task-manager-structure/src/main/resources/META-INF/spring/jdbc.properties b/spring-framework/spring-task-manager-structure/src/main/resources/META-INF/spring/jdbc.properties
new file mode 100644
index 0000000..c549772
--- /dev/null
+++ b/spring-framework/spring-task-manager-structure/src/main/resources/META-INF/spring/jdbc.properties
@@ -0,0 +1,9 @@
+jdbc.driverClassName=org.mariadb.jdbc.Driver
+#jdbc.url=jdbc:mysql://localhost/bankdb?useSSL=false
+#jdbc.url=jdbc:mysql://localhost/bankdb?useLegacyDatetimeCode=false&serverTimezone=UTC
+jdbc.url=jdbc:mariadb://localhost/bank?serverTimezone=Asia/Colombo
+jdbc.username=bankuser
+jdbc.password=bankpwd
+
+#jdbc.driverClassName=org.postgresql.Driver
+#jdbc.url=jdbc:postgresql://localhost/bank
-- 
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