| 28. 50. 2. Spring Aspect Logging |
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File: IBusinessLogic.java |
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public interface IBusinessLogic
{
public void foo();
public void bar() throws BusinessLogicException;
}
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File: LoggingThrowsAdvice.java |
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import org.springframework.aop.ThrowsAdvice;
import java.lang.reflect.Method;
public class LoggingThrowsAdvice implements ThrowsAdvice
{
public void afterThrowing(Method method, Object[] args, Object target, Throwable subclass)
{
System.out.println("Logging that a " + subclass + "Exception was thrown.");
}
}
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File: MainApplication.java |
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import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
public class MainApplication
{
public static void main(String [] args)
{
// Read the configuration file
ApplicationContext ctx
= new FileSystemXmlApplicationContext("build/springconfig.xml");
//Instantiate an object
IBusinessLogic testObject = (IBusinessLogic) ctx.getBean("businesslogicbean");
//Execute the public methods of the bean
testObject.foo();
try
{
testObject.bar();
}
catch(BusinessLogicException ble)
{
System.out.println("Caught BusinessLogicException");
}
}
}
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File: TracingAfterAdvice.java |
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import java.lang.reflect.Method;
import org.springframework.aop.AfterReturningAdvice;
public class TracingAfterAdvice implements AfterReturningAdvice
{
public void afterReturning(Object object, Method m, Object[] args, Object target) throws Throwable
{
System.out.println("Hello world! (by " + this.getClass().getName() + ")");
}
}
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File: TracingBeforeAdvice.java |
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import java.lang.reflect.Method;
import org.springframework.aop.MethodBeforeAdvice;
public class TracingBeforeAdvice implements MethodBeforeAdvice
{
public void before(Method m, Object[] args, Object target) throws Throwable
{
System.out.println("Hello world! (by " + this.getClass().getName() + ")");
}
}
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File: BusinessLogic.java |
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public class BusinessLogic implements IBusinessLogic
{
public void foo()
{
System.out.println("Inside BusinessLogic.foo()");
}
public void bar() throws BusinessLogicException
{
System.out.println("Inside BusinessLogic.bar()");
throw new BusinessLogicException();
}
}
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File: BusinessLogicException.java |
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public class BusinessLogicException extends Exception
{
}
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File: springconfig.xml |
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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<!--CONFIG-->
<bean id="businesslogicbean"
class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="proxyInterfaces">
<value>IBusinessLogic</value>
</property>
<property name="target">
<ref local="beanTarget"/>
</property>
<property name="interceptorNames">
<list>
<value>tracingBeforeAdvisor</value>
<value>tracingAfterAdvisor</value>
<value>loggingThrowsAdvisor</value>
</list>
</property>
</bean>
<!--CLASS-->
<bean id="beanTarget"
class="BusinessLogic"/>
<!-- Advisor pointcut definition for before advice -->
<bean id="tracingBeforeAdvisor"
class="org.springframework.aop.support.RegexpMethodPointcutAdvisor">
<property name="advice">
<ref local="theTracingBeforeAdvice"/>
</property>
<property name="pattern">
<value>.*</value>
</property>
</bean>
<!-- Advisor pointcut definition for after advice -->
<bean id="tracingAfterAdvisor"
class="org.springframework.aop.support.RegexpMethodPointcutAdvisor">
<property name="advice">
<ref local="theTracingAfterAdvice"/>
</property>
<property name="pattern">
<value>.*</value>
</property>
</bean>
<!-- Advisor pointcut definition for throws advice -->
<bean id="loggingThrowsAdvisor"
class="org.springframework.aop.support.RegexpMethodPointcutAdvisor">
<property name="advice">
<ref local="theLoggingThrowsAdvice"/>
</property>
<property name="pattern">
<value>.*</value>
</property>
</bean>
<!--ADVICE-->
<bean id="theTracingBeforeAdvice"
class="TracingBeforeAdvice"/>
<bean id="theTracingAfterAdvice"
class="TracingAfterAdvice"/>
<bean id="theLoggingThrowsAdvice"
class="LoggingThrowsAdvice"/>
</beans>
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 Download: Spring-SpringAspectLogging.zip( 1,540 k) |