Added Spring Framework sample code

8 files changed, 226 insertions, 0 deletions

diff --git a/spring-framework/22-aop-xml-around/src/main/java/com/example/spring/App.java b/spring-framework/22-aop-xml-around/src/main/java/com/example/spring/App.java
new file mode 100644
index 0000000..13a782c
--- /dev/null
+++ b/spring-framework/22-aop-xml-around/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/22-aop-xml-around/src/main/java/com/example/spring/aop/Account.java b/spring-framework/22-aop-xml-around/src/main/java/com/example/spring/aop/Account.java
new file mode 100644
index 0000000..f2d0e84
--- /dev/null
+++ b/spring-framework/22-aop-xml-around/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/22-aop-xml-around/src/main/java/com/example/spring/aop/BankApp.java b/spring-framework/22-aop-xml-around/src/main/java/com/example/spring/aop/BankApp.java
new file mode 100644
index 0000000..2473692
--- /dev/null
+++ b/spring-framework/22-aop-xml-around/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/22-aop-xml-around/src/main/java/com/example/spring/aop/aoplogger/Logger.java b/spring-framework/22-aop-xml-around/src/main/java/com/example/spring/aop/aoplogger/Logger.java
new file mode 100644
index 0000000..4ca8621
--- /dev/null
+++ b/spring-framework/22-aop-xml-around/src/main/java/com/example/spring/aop/aoplogger/Logger.java
@@ -0,0 +1,26 @@
+package com.example.spring.aop.aoplogger;
+
+import org.aspectj.lang.JoinPoint;
+import org.aspectj.lang.ProceedingJoinPoint;
+
+public class Logger {
+
+	public void beforMethodExecuted(JoinPoint joinPoint) {
+		System.out.println("AOP Logger (BEFORE): " + joinPoint.getSignature());
+	}
+
+	public void afterMethodExecuted(JoinPoint joinPoint) {
+		System.out.println("AOP Logger (AFTER): " + joinPoint.getSignature());
+	}
+
+	public Object methodExecutionMonitor(ProceedingJoinPoint pjp) throws Throwable {
+
+		long startTime = System.nanoTime();
+		Object retVal = pjp.proceed();
+		long endTime = System.nanoTime();
+
+		System.out.println("Method execution time (ns): " + pjp.getSignature() + " " + (endTime - startTime));
+
+		return retVal;
+	}
+}
diff --git a/spring-framework/22-aop-xml-around/src/main/java/com/example/spring/aop/security/AccessChecker.java b/spring-framework/22-aop-xml-around/src/main/java/com/example/spring/aop/security/AccessChecker.java
new file mode 100644
index 0000000..8167f08
--- /dev/null
+++ b/spring-framework/22-aop-xml-around/src/main/java/com/example/spring/aop/security/AccessChecker.java
@@ -0,0 +1,16 @@
+package com.example.spring.aop.security;
+
+public class AccessChecker {
+
+   public void checkDepositPermission() {
+	   System.out.println("Aspect is checking deposit permission...");
+   }
+   
+   
+   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.");
+	   }
+   }
+}
diff --git a/spring-framework/22-aop-xml-around/src/main/java/com/example/spring/aop/security/AccessChecker2.java b/spring-framework/22-aop-xml-around/src/main/java/com/example/spring/aop/security/AccessChecker2.java
new file mode 100644
index 0000000..4174f04
--- /dev/null
+++ b/spring-framework/22-aop-xml-around/src/main/java/com/example/spring/aop/security/AccessChecker2.java
@@ -0,0 +1,16 @@
+package com.example.spring.aop.security;
+
+import org.aspectj.lang.JoinPoint;
+
+public class AccessChecker2 {
+
+	public void checkDepositPermission(JoinPoint joinPoint) {
+		Object[] args = joinPoint.getArgs();
+		System.out.println("Deposit amount: " + args[0]);
+	}
+
+	public void checkWithdrawPermission(JoinPoint joinPoint) {
+		Object[] args = joinPoint.getArgs();
+		System.out.println("Withdraw amount: " + args[0]);
+	}
+}
diff --git a/spring-framework/22-aop-xml-around/src/main/java/com/example/spring/aop/security/AccessException.java b/spring-framework/22-aop-xml-around/src/main/java/com/example/spring/aop/security/AccessException.java
new file mode 100644
index 0000000..0e1b60c
--- /dev/null
+++ b/spring-framework/22-aop-xml-around/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/22-aop-xml-around/src/main/resources/META-INF/spring/applicationContext.xml b/spring-framework/22-aop-xml-around/src/main/resources/META-INF/spring/applicationContext.xml
new file mode 100644
index 0000000..b6126cf
--- /dev/null
+++ b/spring-framework/22-aop-xml-around/src/main/resources/META-INF/spring/applicationContext.xml
@@ -0,0 +1,60 @@
+<?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">
+
+	<bean id="account" class="com.example.spring.aop.Account">
+		<property name="accNo" value="1000"></property>
+		<property name="balance" value="250.00"></property>
+	</bean>
+
+	<!-- Here is a bean representing the security aspect -->
+	<bean id="accessChecker"
+		class="com.example.spring.aop.security.AccessChecker2" />
+
+	<!-- This aspect can print the method signatures when methods are executed 
+		- before, and after -->
+	<bean id="aopLogger"
+		class="com.example.spring.aop.aoplogger.Logger" />
+
+	<aop:config>
+		<!-- <aop:aspect id="securityAspect" ref="accessChecker"> -->
+
+		<!-- <aop:pointcut id="deposit" -->
+		<!-- expression="execution(public * com.example.spring.aop.Account.deposit(..))" 
+			/> -->
+		<!-- <aop:before pointcut-ref="deposit" -->
+		<!-- method="checkDepositPermission" /> -->
+
+		<!-- <aop:pointcut id="withdraw" -->
+		<!-- expression="execution(public * com.example.spring.aop.Account.withdraw(..))" 
+			/> -->
+		<!-- <aop:before pointcut-ref="withdraw" -->
+		<!-- method="checkWithdrawPermission" /> -->
+
+		<!-- </aop:aspect> -->
+
+		<!-- <aop:aspect id="loggerAspect" ref="aopLogger"> -->
+
+		<!-- <aop:pointcut id="bankPackageMethod" -->
+		<!-- expression="execution(public * com.example.spring.aop.**.*(..))" /> -->
+		<!-- <aop:before pointcut-ref="bankPackageMethod" -->
+		<!-- method="beforMethodExecuted" /> -->
+		<!-- <aop:after pointcut-ref="bankPackageMethod" -->
+		<!-- method="afterMethodExecuted" /> -->
+
+		<!-- </aop:aspect> -->
+
+		<aop:aspect id="loggerAspect" ref="aopLogger">
+			<aop:pointcut id="allMethods"
+				expression="execution(public * com.example.spring.aop.**.*(..))" />
+			<aop:around pointcut-ref="allMethods"
+				method="methodExecutionMonitor" />
+		</aop:aspect>
+	</aop:config>
+
+
+</beans>
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