Added Spring Framework sample code

7 files changed, 202 insertions, 0 deletions

diff --git a/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/App.java b/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/App.java
new file mode 100644
index 0000000..13a782c
--- /dev/null
+++ b/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/App.java
@@ -0,0 +1,11 @@
+package com.example.spring;
+
+import com.example.spring.aop.BankApp;
+
+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.
+		BankApp.main(args);
+	}
+}
diff --git a/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/aop/Account.java b/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/aop/Account.java
new file mode 100644
index 0000000..f2d0e84
--- /dev/null
+++ b/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/aop/Account.java
@@ -0,0 +1,38 @@
+package com.example.spring.aop;
+
+public class Account {
+	private int accNo;
+	private double balance;
+	
+	public void withdraw(double amount) {
+		if (balance >= amount) {
+			balance -= amount;
+		}
+	}
+	
+	public void deposit(double amount) {
+//		System.out.println("Account.deposit()");
+		balance += amount;
+	}
+	
+	
+	public void printDetails() {
+		System.out.println("Balance of " + accNo + " : " + balance);
+	}
+
+	public int getAccNo() {
+		return accNo;
+	}
+
+	public void setAccNo(int accNo) {
+		this.accNo = accNo;
+	}
+
+	public double getBalance() {
+		return balance;
+	}
+
+	public void setBalance(double balance) {
+		this.balance = balance;
+	}
+}
diff --git a/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/aop/BankApp.java b/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/aop/BankApp.java
new file mode 100644
index 0000000..6ad43cf
--- /dev/null
+++ b/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/aop/BankApp.java
@@ -0,0 +1,29 @@
+package com.example.spring.aop;
+
+import org.springframework.context.support.ClassPathXmlApplicationContext;
+
+public class BankApp {
+
+	/**
+	 * @param args
+	 */
+	public static void main(String[] args) {
+		ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext(new String[] {
+				"classpath:META-INF/spring/applicationContext.xml",});
+		
+		Account acc = ctx.getBean("account", Account.class);
+		
+		acc.printDetails(); // 250
+		acc.withdraw(10);
+		acc.printDetails(); // 240
+		acc.deposit(20);
+		acc.printDetails(); // 260
+		
+//		System.out.println("An exception should occur here if attempted to withdraw a large amount.");
+//		acc.withdraw(1200); // Uncommented, this should throw an exception
+//		acc.printDetails(); // 260
+		
+		ctx.close();
+	}
+
+}
diff --git a/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/aop/security/AccessChecker.java b/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/aop/security/AccessChecker.java
new file mode 100644
index 0000000..dff17bc
--- /dev/null
+++ b/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/aop/security/AccessChecker.java
@@ -0,0 +1,50 @@
+package com.example.spring.aop.security;
+
+import org.aspectj.lang.annotation.Aspect;
+import org.aspectj.lang.annotation.Before;
+
+@Aspect
+public class AccessChecker {
+
+	/*
+	 * In-place pointcut expressions are used here (i.e. the pointcut
+	 * expression is just declared with the advice directly rather than
+	 * elsewhere).
+	 */
+//    @Before("execution(public * com.example.spring.aop.Account.deposit(..))")
+//    public void checkDepositPermission() {
+//	    System.out.println("Aspect is checking deposit permission...");
+//    }
+//   
+//    @After("execution(public * com.example.spring.aop.Account.deposit(..))")
+//    public void checkDepositPermissionAfterDemo() {
+//	    System.out.println("checkDepositPermissionAfterDemo()");
+//    }
+//	 
+//    @Before("execution(public * com.example.spring.aop.Account.withdraw(..)) && args(amount)")
+//    public void checkWithdrawPermission(double amount) {
+//	    System.out.println("Aspect is checking withdraw permission for " + amount);
+//	    if (amount > 1000.0) {
+//		    throw new AccessException("Withdrawing more than 1000.0 is not allowed.");
+//	    }
+//    }
+    
+    
+    @Before("MyPointcuts.abc()")
+    public void checkDepositPermission() {
+	    System.out.println("Aspect is checking deposit permission...");
+    }
+    
+	@Before("MyPointcuts.checkWithAmount(amount)")
+	public void checkWithdrawPermission(double amount) {
+		System.out.println("Aspect is checking withdraw permission for " + amount);
+		if (amount > 1000.0) {
+			throw new AccessException("Withdrawing more than 1000.0 is not allowed.");
+		}
+	}
+	
+	@Before("MyPointcuts.depositAndWithdraw()")
+	public void depositAndWithdraw() {
+		System.out.println("depositAndWithdraw()");
+	}
+}
diff --git a/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/aop/security/AccessException.java b/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/aop/security/AccessException.java
new file mode 100644
index 0000000..0e1b60c
--- /dev/null
+++ b/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/aop/security/AccessException.java
@@ -0,0 +1,30 @@
+package com.example.spring.aop.security;
+
+public class AccessException extends RuntimeException {
+
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = -6529989268011261235L;
+
+	public AccessException() {
+		// TODO Auto-generated constructor stub
+	}
+
+	public AccessException(String message) {
+		super(message);
+		// TODO Auto-generated constructor stub
+	}
+
+	public AccessException(Throwable cause) {
+		super(cause);
+		// TODO Auto-generated constructor stub
+	}
+
+	public AccessException(String message, Throwable cause) {
+		super(message, cause);
+		// TODO Auto-generated constructor stub
+	}
+
+}
diff --git a/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/aop/security/MyPointcuts.java b/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/aop/security/MyPointcuts.java
new file mode 100644
index 0000000..51f7104
--- /dev/null
+++ b/spring-framework/24-aop-aspectj-annotations2/src/main/java/com/example/spring/aop/security/MyPointcuts.java
@@ -0,0 +1,20 @@
+package com.example.spring.aop.security;
+
+import org.aspectj.lang.annotation.Aspect;
+import org.aspectj.lang.annotation.Pointcut;
+
+@Aspect
+public class MyPointcuts {
+
+	/*
+	 * Following are the pointcut declarations. Note that these can be defined in separate classes as well.
+	 */
+	@Pointcut("execution(public * com.example.spring.aop.Account.withdraw(..)) && args(amount)") // pointcut expression - a selector
+	public void checkWithAmount(double amount) {} //  pointcut signature - the name for the pointcut
+	
+	@Pointcut("execution(public * com.example.spring.aop.Account.deposit(..))") // pointcut expression - a selector
+	public void abc() {} //  pointcut signature - the name for the pointcut
+	
+	@Pointcut("execution(public * com.example.spring.aop.Account.withdraw(..)) || execution(public * com.example.spring.aop.Account.deposit(..))")
+	public void depositAndWithdraw() {}
+}
diff --git a/spring-framework/24-aop-aspectj-annotations2/src/main/resources/META-INF/spring/applicationContext.xml b/spring-framework/24-aop-aspectj-annotations2/src/main/resources/META-INF/spring/applicationContext.xml
new file mode 100644
index 0000000..1da13a1
--- /dev/null
+++ b/spring-framework/24-aop-aspectj-annotations2/src/main/resources/META-INF/spring/applicationContext.xml
@@ -0,0 +1,24 @@
+<?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:aop="http://www.springframework.org/schema/aop"
+	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/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
+
+	<!-- Enabled annotation based AOP -->	
+	<aop:aspectj-autoproxy/>
+	
+	<!-- This been describes pointcuts -->
+	<bean id="myPointcuts" class="com.example.spring.aop.security.MyPointcuts" />
+	
+	<!-- This bean simply references pointcuts -->
+	<bean id="accessChecker" class="com.example.spring.aop.security.AccessChecker" />
+	
+	
+	<bean id="account" class="com.example.spring.aop.Account">
+		<property name="accNo" value="1000"></property>
+		<property name="balance" value="250.00"></property>
+	</bean>
+
+</beans>
\ No newline at end of file