Let’s begin.\n<\/p>\n
1. Create a new Maven project<\/h2>\n
Go to File -> Project ->Maven -> Maven Project.<\/p>\n
In the “Select project name and location” page of the wizard, make sure that “Create a simple project (skip archetype selection)” option is checked<\/strong>, hit “Next” to continue with default values.<\/p>\n In the “Enter an artifact id” page of the wizard, you can define the name and main package of your project. We will set the “Group Id” variable to The Maven project structure is shown below:<\/p>\n Alternatively, you can add the Spring dependencies in Maven\u2019s As you can see Maven manages library dependencies declaratively. A local repository is created (by default under {user_home}\/.m2 folder) and all required libraries are downloaded and placed there from public repositories. Furthermore intra \u2013 library dependencies are automatically resolved and manipulated.<\/p>\n In AOP the Advice is an action taken before or after a method execution. There are different types of advice, such as “around,” “before” and “after” advice. Below we introduce all types of advice and create an example for each one of them.<\/p>\n SimpleService.java<\/em><\/span><\/p>\n Before Advice executes before a method execution, but does not have the ability to prevent execution flow proceeding to the method execution (unless it throws an exception). The class that implements it is the one below:<\/p>\n <\/em>DoBeforeMethod.java<\/span><\/p>\n The advice bean must be defined in Spring configuration file. In addition, a proxy object must be created, of applicationContext.xml<\/em><\/span><\/p>\n We must load the App.java<\/em><\/span><\/p>\n As a result, the Output<\/em><\/span><\/p>\n After returning advice is the Advice to be executed after a method execution completes normally: for example, if a method returns without throwing an exception. The class that implements it is the one below:<\/p>\n <\/em>DoAfterReturningMethod.java<\/span><\/p>\n We add the new bean in applicationContext.xml<\/em><\/span><\/p>\n Now, after running Output<\/em><\/span><\/p>\n After throwing Advice is the Advice to be executed if a method exits by throwing an exception. The class that implements it in the example is the one shown below:<\/p>\n <\/em>DoAfterThrowingExceptionMethod.java<\/span> We add the new bean in applicationContext.xml<\/em><\/span><\/p>\n Now, after running the example again we can see that only the Output<\/em><\/span><\/p>\n Around advice is the Advice that surrounds a join point such as a method invocation. This is the most powerful kind of advice. Around advice can perform custom behavior before and after the method invocation. It is also responsible for choosing whether to proceed to the join point or to shortcut the advised method execution by returning its own return value or throwing an exception. The class that implements an around Advice is shown below:<\/p>\n <\/em>DoAroundMethod.java<\/span><\/p>\n applicationContext.xml<\/em><\/span><\/p>\n When running the application with the Output<\/em><\/span><\/p>\n The Pointcut indicates which method should be intercepted whereas the Advisor groups the Advice and the Pointcut into a single unit, and passes it to a proxy factory object.<\/p>\n There are two types of Pointcuts, the ones that match a method by its name and the ones that match a method using a regular expression pattern. Let’s see how both types of Pointcuts can be used.<\/p>\n In order to create a new Pointcut that will match a method by its name, we have to define it as a bean of We must also define the advisor as a bean of Finally, in applicationContext.xml<\/em><\/span><\/p>\n We run the Output<\/em><\/span><\/p>\n Alternatively, you can use the applicationContext.xml<\/em><\/span><\/p>\n Now, in order to create a pointcut that matches the method to be intercepted with a regular exression, we must define a new bean of applicationContext.xml<\/em><\/span><\/p>\n After running Output<\/em><\/span><\/p>\n Now, let’s see how the sequence of the values in DoAroundMethod2.java<\/em><\/span><\/p>\n applicationContext.xml<\/em><\/span><\/p>\n When running the application we can see that the around method advice whose bean is defined first in Output<\/em><\/span><\/p>\n Now, let’s change the sequence of the interceptors in applicationContext.xml<\/em><\/span><\/p>\n Again, the first defined interceptor is the one that intercepts the methods first:<\/p>\n Output<\/em><\/span><\/p>\n An interesting feature of Spring is that it provides two auto proxy creators, so that we can create proxies for our beans automatically.<\/p>\n The first auto proxy creator Spring provides is the applicationContext.xml<\/em><\/span><\/p>\n Now we can load the The output is shown below: The second auto proxy creator Spring provides is the applicationContext.xml<\/em><\/span><\/p>\n After running Output<\/em><\/span><\/p>\n With this tutorial we shall show you how to use Aspect Oriented Programming in Spring Framework. AOP is used in the Spring Framework to provide declarative enterprise services, especially as a replacement for EJB declarative services. It is also used to allow users to implement custom aspects, complementing their use of OOP with AOP. We …<\/p>\n","protected":false},"author":5,"featured_media":1248,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[465],"tags":[],"class_list":["post-5629","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aop"],"yoast_head":"\n![\"New-Maven-Project\"](\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2013\/06\/New-Maven-Project.png\")
<\/a><\/p>\n![\"Maven-Project-Name-Location\"](\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2013\/06\/Maven-Project-Name-Location.png\")
<\/a><\/p>\n\"com.javacodegeeks.snippets.enterprise\"<\/code> and the “Artifact Id” variable to \"springexample\"<\/code>. The aforementioned selections compose the main project package as \"com.javacodegeeks.snippets.enterprise.springexample\"<\/code> and the project name as \"springexample\"<\/code>. Hit “Finish” to exit the wizard and to create your project.<\/p>\n![\"Configure-Maven-Project\"](\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2013\/06\/Configure-Maven-Project.jpg\")
<\/a><\/p>\n![\"Maven-project-structure\"](\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2013\/06\/Maven-project-structure.jpg\")
<\/a><\/p>\nIt consists of the following folders:<\/p>\n
2. Add Spring 3.2.3 dependency<\/h2>\n
\n
\nCreate a new property with name org.springframework.version<\/strong> and value 3.2.3.RELEASE<\/strong>.<\/li>\n
\nGroup Id : org.springframework<\/strong> Artifact Id : spring-web<\/strong> Version : ${org.springframework.version}<\/strong><\/li>\n<\/ul>\npom.xml<\/code> file, by directly editing it at the “Pom.xml” page of the POM editor, as shown below:
\n
\npom.xml:<\/em><\/span><\/p>\n<project xmlns=\"http:\/\/maven.apache.org\/POM\/4.0.0\"; xmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\"\n\txsi:schemaLocation=\"http:\/\/maven.apache.org\/POM\/4.0.0 http:\/\/maven.apache.org\/xsd\/maven-4.0.0.xsd\">\n\t<modelVersion>4.0.0<\/modelVersion>\n\t<groupId>com.javacodegeeks.snippets.enterprise<\/groupId>\n\t<artifactId>springexample<\/artifactId>\n\t<version>0.0.1-SNAPSHOT<\/version>\n\n\t<dependencies>\n\t\t<dependency>\n\t\t\t<groupId>org.springframework<\/groupId>\n\t\t\t<artifactId>spring-core<\/artifactId>\n\t\t\t<version>${spring.version}<\/version>\n\t\t<\/dependency>\n\t\t<dependency>\n\t\t\t<groupId>org.springframework<\/groupId>\n\t\t\t<artifactId>spring-context<\/artifactId>\n\t\t\t<version>${spring.version}<\/version>\n\t\t<\/dependency>\n\t<\/dependencies>\n\n\t<properties>\n\t\t<spring.version>3.2.3.RELEASE<\/spring.version>\n\t<\/properties>\n<\/project>\n<\/pre>\n3. Create an Advice<\/h2>\n
SimpleService.java<\/code> class is the class whose methods will be intercepted by the advices we will create.<\/p>\npackage com.javacodegeeks.snippets.enterprise;\n\npublic class SimpleService {\n\n\tprivate String name;\n\n\tprivate int id;\n\n\tpublic String getName() {\n\t\treturn name;\n\t}\n\n\tpublic void setName(String name) {\n\t\tthis.name = name;\n\t}\n\n\tpublic int getId() {\n\t\treturn id;\n\t}\n\n\tpublic void setId(int id) {\n\t\tthis.id = id;\n\t}\n\n\tpublic void printNameId() {\n\t\tSystem.out.println(\"SimpleService : Method printNameId() : My name is \" + name\n\t\t\t + \" and my id is \" + id);\n\t}\n\n\tpublic void checkName() {\n\t\tif (name.length() < 20) {\n\t\t\tthrow new IllegalArgumentException();\n\t\t}\n\t}\n\n\tpublic void sayHello(String message){\n\t\tSystem.out.println(\"SimpleService : Method sayHello() : Hello! \" + message);\n\t}\n}\n<\/pre>\n3.1 Before Advice<\/h3>\n
package com.javacodegeeks.snippets.enterprise.aop;\n\nimport java.lang.reflect.Method;\nimport org.springframework.aop.MethodBeforeAdvice;\n \npublic class DoBeforeMethod implements MethodBeforeAdvice\n{\n\tpublic void before(Method method, Object[] args, Object target)\n\t\tthrows Throwable {\n\t System.out.println(\"****SPRING AOP**** DoBeforeMethod : Executing before method!\");\n\t}\n}\n<\/pre>\nProxyFactoryBean<\/code> type. The proxy bean has a target<\/code> property. Its value is a reference to the bean whose methods will be intercepted. It also has an interceptorNames<\/code> property. The property value is a list of bean names that represent the advices that will be applied on this proxy \/target object.<\/p>\n<beans xmlns=\"http:\/\/www.springframework.org\/schema\/beans\"\n\txmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\" xmlns:p=\"http:\/\/www.springframework.org\/schema\/p\"\n\txmlns:aop=\"http:\/\/www.springframework.org\/schema\/aop\" xmlns:context=\"http:\/\/www.springframework.org\/schema\/context\"\n\txmlns:jee=\"http:\/\/www.springframework.org\/schema\/jee\" xmlns:tx=\"http:\/\/www.springframework.org\/schema\/tx\"\n\txmlns:task=\"http:\/\/www.springframework.org\/schema\/task\"\n\txsi:schemaLocation=\"http:\/\/www.springframework.org\/schema\/aop http:\/\/www.springframework.org\/schema\/aop\/spring-aop-3.2.xsd http:\/\/www.springframework.org\/schema\/beans http:\/\/www.springframework.org\/schema\/beans\/spring-beans-3.2.xsd http:\/\/www.springframework.org\/schema\/context http:\/\/www.springframework.org\/schema\/context\/spring-context-3.2.xsd http:\/\/www.springframework.org\/schema\/jee http:\/\/www.springframework.org\/schema\/jee\/spring-jee-3.2.xsd http:\/\/www.springframework.org\/schema\/tx http:\/\/www.springframework.org\/schema\/tx\/spring-tx-3.2.xsd http:\/\/www.springframework.org\/schema\/task http:\/\/www.springframework.org\/schema\/task\/spring-task-3.2.xsd\">\n\n\t<bean id=\"simpleServiceBean\" class=\"com.javacodegeeks.snippets.enterprise.SimpleService\">\n\t\t<property name=\"name\" value=\"Hello\" \/>\n\t\t<property name=\"id\" value=\"12345\" \/>\n\t<\/bean>\n\n\t<bean id=\"doBeforeMethodBean\"\n\t\tclass=\"com.javacodegeeks.snippets.enterprise.aop.DoBeforeMethod\" \/>\n\n\t<bean id=\"simpleServiceProxy\" class=\"org.springframework.aop.framework.ProxyFactoryBean\">\n\t\t<property name=\"target\" ref=\"simpleServiceBean\" \/>\n\t\t<property name=\"interceptorNames\">\n\t\t\t<list>\n\t\t\t\t<value>doBeforeMethodBean<\/value>\n\t\t\t<\/list>\n\t\t<\/property>\n\t<\/bean>\n<\/beans>\n<\/pre>\n
simpleServiceProxy<\/code> bean in App.class<\/code> in order to run the application, as shown below:<\/p>\npackage com.javacodegeeks.snippets.enterprise;\n\nimport org.springframework.context.ConfigurableApplicationContext;\nimport org.springframework.context.support.ClassPathXmlApplicationContext;\n\npublic class App {\n\n\tpublic static void main(String[] args) {\n\t\n\t\t\tConfigurableApplicationContext context = new ClassPathXmlApplicationContext(\"applicationContext.xml\");\n\t\t\tSimpleService simpleService = (SimpleService) context.getBean(\"simpleServiceProxy\");\n\t\t\tsimpleService.printNameId();\n\t\t\tSystem.out.println(\"--------------\");\n\t\t\ttry{\n\t\t\t\tsimpleService.checkName();\n\t\t\t} catch(Exception e){\n\t\t\t\tSystem.out.println(\"SimpleService: Method checkName() exception thrown..\");\n\t\t\t}\n\t\t\tSystem.out.println(\"--------------\");\n\t\t\tsimpleService.sayHello(\"Javacodegeeks\");\n\t\t\tcontext.close();\n\t}\n}\n<\/pre>\nbefore(Method method, Object[] args, Object target)<\/code> method of the DoBeforeMethod<\/code> Advice is invoked before the simpleService<\/code>‘s methods execution.<\/p>\n****SPRING AOP**** DoBeforeMethod : Executing before method!\nSimpleService : Method printNameId() : My name is Hello and my id is 12345 \n--------------\n****SPRING AOP**** DoBeforeMethod : Executing before method!\nSimpleService: Method checkName() exception thrown..\n--------------\n****SPRING AOP**** DoBeforeMethod : Executing before method!\nSimpleService : Method sayHello() : Hello! Javacodegeeks<\/code><\/pre>\n3.2 After Returning Advice<\/h3>\n
package com.javacodegeeks.snippets.enterprise.aop;\n\nimport java.lang.reflect.Method;\nimport org.springframework.aop.AfterReturningAdvice;\n\npublic class DoAfterReturningMethod implements AfterReturningAdvice {\n\tpublic void afterReturning(Object returnValue, Method method,\n\t\t\tObject[] args, Object target) throws Throwable {\n\t\tSystem.out.println(\"****SPRING AOP**** DoAfterReturningMethod : Executing after method return!\");\n\t}\n\n}<\/pre>\napplicationContext.xml<\/code>, following the same steps as above.<\/p>\n<beans xmlns=\"http:\/\/www.springframework.org\/schema\/beans\"\n\txmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\" xmlns:p=\"http:\/\/www.springframework.org\/schema\/p\"\n\txmlns:aop=\"http:\/\/www.springframework.org\/schema\/aop\" xmlns:context=\"http:\/\/www.springframework.org\/schema\/context\"\n\txmlns:jee=\"http:\/\/www.springframework.org\/schema\/jee\" xmlns:tx=\"http:\/\/www.springframework.org\/schema\/tx\"\n\txmlns:task=\"http:\/\/www.springframework.org\/schema\/task\"\n\txsi:schemaLocation=\"http:\/\/www.springframework.org\/schema\/aop http:\/\/www.springframework.org\/schema\/aop\/spring-aop-3.2.xsd http:\/\/www.springframework.org\/schema\/beans http:\/\/www.springframework.org\/schema\/beans\/spring-beans-3.2.xsd http:\/\/www.springframework.org\/schema\/context http:\/\/www.springframework.org\/schema\/context\/spring-context-3.2.xsd http:\/\/www.springframework.org\/schema\/jee http:\/\/www.springframework.org\/schema\/jee\/spring-jee-3.2.xsd http:\/\/www.springframework.org\/schema\/tx http:\/\/www.springframework.org\/schema\/tx\/spring-tx-3.2.xsd http:\/\/www.springframework.org\/schema\/task http:\/\/www.springframework.org\/schema\/task\/spring-task-3.2.xsd\">\n\n\t<bean id=\"simpleServiceBean\" class=\"com.javacodegeeks.snippets.enterprise.SimpleService\">\n\t\t<property name=\"name\" value=\"Hello\" \/>\n\t\t<property name=\"id\" value=\"12345\" \/>\n\t<\/bean>\n\n\t<bean id=\"doBeforeMethodBean\"\n\t\tclass=\"com.javacodegeeks.snippets.enterprise.aop.DoBeforeMethod\" \/>\n\n\t<bean id=\"doAfterReturningMethodBean\"\n\t\tclass=\"com.javacodegeeks.snippets.enterprise.aop.DoAfterReturningMethod\" \/>\n\n\t<bean id=\"simpleServiceProxy\" class=\"org.springframework.aop.framework.ProxyFactoryBean\">\n\t\t<property name=\"target\" ref=\"simpleServiceBean\" \/>\n\t\t<property name=\"interceptorNames\">\n\t\t\t<list>\n\t\t\t\t<value>doBeforeMethodBean<\/value>\n\t\t\t\t<value>doAfterReturningMethodBean<\/value>\n\t\t\t<\/list>\n\t\t<\/property>\n\t<\/bean>\n<\/beans>\n<\/pre>\n
App.java<\/code> class again we can see that the afterReturning(Object returnValue, Method method, Object[] args, Object target)<\/code> method of DoAfterReturningMethod<\/code> advice is executed after the simpleService<\/code>‘s methods’ execution. Note that since checkName()<\/code> method throws an exception and does not return normally, it is not being intercepted by DoAfterReturningMethod<\/code>.<\/p>\n****SPRING AOP**** DoBeforeMethod : Executing before method!\nSimpleService : Method printNameId() : My name is Hello and my id is 12345\n****SPRING AOP**** DoAfterReturningMethod : Executing after method return!\n--------------\n****SPRING AOP**** DoBeforeMethod : Executing before method!\nSimpleService: Method checkName() exception thrown..\n--------------\n****SPRING AOP**** DoBeforeMethod : Executing before method!\nSimpleService : Method sayHello() : Hello! Javacodegeeks\n****SPRING AOP**** DoAfterReturningMethod : Executing after method return!<\/code><\/pre>\n3.3 After Throwing Advice<\/h3>\n
package com.javacodegeeks.snippets.enterprise.aop;\n\nimport org.springframework.aop.ThrowsAdvice;\n\npublic class DoAfterThrowingExceptionMethod implements ThrowsAdvice {\n\tpublic void afterThrowing(IllegalArgumentException e) throws Throwable {\n\t\tSystem.out.println(\"****SPRING AOP**** DoAfterThrowingExceptionMethod : Executing when method throws exception!\");\n\t}\n}\n<\/pre>\napplicationContext.xml<\/code>.<\/p>\n<beans xmlns=\"http:\/\/www.springframework.org\/schema\/beans\"\n\txmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\" xmlns:p=\"http:\/\/www.springframework.org\/schema\/p\"\n\txmlns:aop=\"http:\/\/www.springframework.org\/schema\/aop\" xmlns:context=\"http:\/\/www.springframework.org\/schema\/context\"\n\txmlns:jee=\"http:\/\/www.springframework.org\/schema\/jee\" xmlns:tx=\"http:\/\/www.springframework.org\/schema\/tx\"\n\txmlns:task=\"http:\/\/www.springframework.org\/schema\/task\"\n\txsi:schemaLocation=\"http:\/\/www.springframework.org\/schema\/aop http:\/\/www.springframework.org\/schema\/aop\/spring-aop-3.2.xsd http:\/\/www.springframework.org\/schema\/beans http:\/\/www.springframework.org\/schema\/beans\/spring-beans-3.2.xsd http:\/\/www.springframework.org\/schema\/context http:\/\/www.springframework.org\/schema\/context\/spring-context-3.2.xsd http:\/\/www.springframework.org\/schema\/jee http:\/\/www.springframework.org\/schema\/jee\/spring-jee-3.2.xsd http:\/\/www.springframework.org\/schema\/tx http:\/\/www.springframework.org\/schema\/tx\/spring-tx-3.2.xsd http:\/\/www.springframework.org\/schema\/task http:\/\/www.springframework.org\/schema\/task\/spring-task-3.2.xsd\">\n\n\t<bean id=\"simpleServiceBean\" class=\"com.javacodegeeks.snippets.enterprise.SimpleService\">\n\t\t<property name=\"name\" value=\"Hello\" \/>\n\t\t<property name=\"id\" value=\"12345\" \/>\n\t<\/bean>\n\n\t<bean id=\"doBeforeMethodBean\"\n\t\tclass=\"com.javacodegeeks.snippets.enterprise.aop.DoBeforeMethod\" \/>\n\n\t<bean id=\"doAfterReturningMethodBean\"\n\t\tclass=\"com.javacodegeeks.snippets.enterprise.aop.DoAfterReturningMethod\" \/>\n\n<bean id=\"doAfterThrowingExceptionMethodBean\"\n\t\tclass=\"com.javacodegeeks.snippets.enterprise.aop.DoAfterThrowingExceptionMethod\" \/>\n\n\t<bean id=\"simpleServiceProxy\" class=\"org.springframework.aop.framework.ProxyFactoryBean\">\n\t\t<property name=\"target\" ref=\"simpleServiceBean\" \/>\n\t\t<property name=\"interceptorNames\">\n\t\t\t<list>\n\t\t\t\t<value>doBeforeMethodBean<\/value>\n\t\t\t\t<value>doAfterReturningMethodBean<\/value>\n\t\t\t\t<value>doAfterThrowingExceptionMethodBean<\/value>\n\t\t\t<\/list>\n\t\t<\/property>\n\t<\/bean>\n<\/beans>\n<\/pre>\n
checkName()<\/code> method is being intercepted by the DoAfterThrowingExceptionMethod<\/code>.<\/p>\n****SPRING AOP**** DoBeforeMethod : Executing before method!\nSimpleService : Method printNameId() : My name is Hello and my id is 12345\n****SPRING AOP**** DoAfterReturningMethod : Executing after method return!\n--------------\n****SPRING AOP**** DoBeforeMethod : Executing before method!\n****SPRING AOP**** DoAfterThrowingExceptionMethod : Executing when method throws exception!\nSimpleService: Method checkName() exception thrown..\n--------------\n****SPRING AOP**** DoBeforeMethod : Executing before method!\nSimpleService : Method sayHello() : Hello! Javacodegeeks\n****SPRING AOP**** DoAfterReturningMethod : Executing after method return!\n<\/code><\/pre>\n3.4 Around Advice<\/h3>\n
package com.javacodegeeks.snippets.enterprise.aop;\n\n\timport java.util.Arrays;\n\t \n\timport org.aopalliance.intercept.MethodInterceptor;\n\timport org.aopalliance.intercept.MethodInvocation;\n\npublic class DoAroundMethod implements MethodInterceptor {\n\t\tpublic Object invoke(MethodInvocation methodInvocation) throws Throwable {\n\t \n\t\t\tSystem.out.println(\"****SPRING AOP**** DoAroundMethod: Method name : \"\n\t\t\t\t\t+ methodInvocation.getMethod().getName());\n\t\t\tSystem.out.println(\"****SPRING AOP**** DoAroundMethod: Method arguments : \"\n\t\t\t\t\t+ Arrays.toString(methodInvocation.getArguments()));\n\t\t\t\/\/ same with MethodBeforeAdvice\n\t\t\tSystem.out.println(\"****SPRING AOP**** DoAroundMethod: Before method executing!\");\n\t \n\t\t\ttry {\n\t\t\t\t\/\/ proceed to original method call\n\t\t\t\tObject result = methodInvocation.proceed();\n\t\t\t\t\/\/ same with AfterReturningAdvice\n\t\t\t\tSystem.out.println(\"****SPRING AOP**** DoAroundMethod: After method executing!\");\n\t\t\t\treturn result;\n\t \n\t\t\t} catch (IllegalArgumentException e) {\n\t\t\t\t\/\/ same with ThrowsAdvice\n\t\t\t\tSystem.out.println(\"****SPRING AOP**** DoAroundMethod: When method throws Exception!\");\n\t\t\t\tthrow e;\n\t\t\t}\n\t\t}\n\n}<\/pre>\n<beans xmlns=\"http:\/\/www.springframework.org\/schema\/beans\"\n\txmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\" xmlns:p=\"http:\/\/www.springframework.org\/schema\/p\"\n\txmlns:aop=\"http:\/\/www.springframework.org\/schema\/aop\" xmlns:context=\"http:\/\/www.springframework.org\/schema\/context\"\n\txmlns:jee=\"http:\/\/www.springframework.org\/schema\/jee\" xmlns:tx=\"http:\/\/www.springframework.org\/schema\/tx\"\n\txmlns:task=\"http:\/\/www.springframework.org\/schema\/task\"\n\txsi:schemaLocation=\"http:\/\/www.springframework.org\/schema\/aop http:\/\/www.springframework.org\/schema\/aop\/spring-aop-3.2.xsd http:\/\/www.springframework.org\/schema\/beans http:\/\/www.springframework.org\/schema\/beans\/spring-beans-3.2.xsd http:\/\/www.springframework.org\/schema\/context http:\/\/www.springframework.org\/schema\/context\/spring-context-3.2.xsd http:\/\/www.springframework.org\/schema\/jee http:\/\/www.springframework.org\/schema\/jee\/spring-jee-3.2.xsd http:\/\/www.springframework.org\/schema\/tx http:\/\/www.springframework.org\/schema\/tx\/spring-tx-3.2.xsd http:\/\/www.springframework.org\/schema\/task http:\/\/www.springframework.org\/schema\/task\/spring-task-3.2.xsd\">\n\n\t<bean id=\"simpleServiceBean\" class=\"com.javacodegeeks.snippets.enterprise.SimpleService\">\n\t\t<property name=\"name\" value=\"Hello\" \/>\n\t\t<property name=\"id\" value=\"12345\" \/>\n\t<\/bean>\n\n\t<bean id=\"doBeforeMethodBean\"\n\t\tclass=\"com.javacodegeeks.snippets.enterprise.aop.DoBeforeMethod\" \/>\n\n\t<bean id=\"doAfterReturningMethodBean\"\n\t\tclass=\"com.javacodegeeks.snippets.enterprise.aop.DoAfterReturningMethod\" \/>\n\n<bean id=\"doAfterThrowingExceptionMethodBean\"\n\t\tclass=\"com.javacodegeeks.snippets.enterprise.aop.DoAfterThrowingExceptionMethod\" \/>\n\n<bean id=\"doAroundMethodBean\"\n\t\tclass=\"com.javacodegeeks.snippets.enterprise.aop.DoAroundMethod\" \/>\n\n\t<bean id=\"simpleServiceProxy\" class=\"org.springframework.aop.framework.ProxyFactoryBean\">\n\t\t<property name=\"target\" ref=\"simpleServiceBean\" \/>\n\t\t<property name=\"interceptorNames\">\n\t\t\t<list>\n\t\t\t\t<value>doBeforeMethodBean<\/value>\n\t\t\t\t<value>doAfterReturningMethodBean<\/value>\n\t\t\t\t<value>doAfterThrowingExceptionMethodBean<\/value>\n\t\t\t\t<value>doAroundMethodBean<\/value>\n\t\t\t<\/list>\n\t\t<\/property>\n\t<\/bean>\n<\/beans>\n<\/pre>\n
DoAroundMethod<\/code> advice we can see that it intercepts all methods of simpleService<\/code>.<\/p>\n****SPRING AOP**** DoBeforeMethod : Executing before method!\n****SPRING AOP**** DoAroundMethod: Method name : printNameId\n****SPRING AOP**** DoAroundMethod: Method arguments : []\n****SPRING AOP**** DoAroundMethod: Before method executing!\nSimpleService : Method printNameId() : My name is Hello and my id is 12345\n****SPRING AOP**** DoAroundMethod: After method executing!\n****SPRING AOP**** DoAfterReturningMethod : Executing after method return!\n--------------\n****SPRING AOP**** DoBeforeMethod : Executing before method!\n****SPRING AOP**** DoAroundMethod: Method name : checkName\n****SPRING AOP**** DoAroundMethod: Method arguments : []\n****SPRING AOP**** DoAroundMethod: Before method executing!\n****SPRING AOP**** DoAroundMethod: When method throws Exception!\n****SPRING AOP**** DoAfterThrowingExceptionMethod : Executing when method throws exception!\nSimpleService: Method checkName() exception thrown..\n--------------\n****SPRING AOP**** DoBeforeMethod : Executing before method!\n****SPRING AOP**** DoAroundMethod: Method name : sayHello\n****SPRING AOP**** DoAroundMethod: Method arguments : [Javacodegeeks]\n****SPRING AOP**** DoAroundMethod: Before method executing!\nSimpleService : Method sayHello() : Hello! Javacodegeeks\n****SPRING AOP**** DoAroundMethod: After method executing!\n****SPRING AOP**** DoAfterReturningMethod : Executing after method return!\n<\/code><\/pre>\n4. Create a Pointcut and an Advisor<\/h2>\n
4.1 name match pointcut<\/h3>\n
NameMatchMethodPointcut<\/code> type in applicationContext.xml<\/code>. In its property mappedName<\/code>, the value to be set is the name of the method that will be intercepted. Here, we will intercept sayHello(String message)<\/code> method.<\/p>\nDefaultPointcutAdvisor<\/code> type, here simpleAdvisor<\/code> bean. Its properties are pointcut<\/code> and advice<\/code> and their values are references to the beans of the advice and the pointcut that will be used.<\/p>\nsimpleServiceProxy<\/code> bean we must replace the doAroundMethodBean<\/code> value of interceptorNames<\/code> property with the simpleAdvisor<\/code>.<\/p>\n<beans xmlns=\"http:\/\/www.springframework.org\/schema\/beans\"\n\txmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\" xmlns:p=\"http:\/\/www.springframework.org\/schema\/p\"\n\txmlns:aop=\"http:\/\/www.springframework.org\/schema\/aop\" xmlns:context=\"http:\/\/www.springframework.org\/schema\/context\"\n\txmlns:jee=\"http:\/\/www.springframework.org\/schema\/jee\" xmlns:tx=\"http:\/\/www.springframework.org\/schema\/tx\"\n\txmlns:task=\"http:\/\/www.springframework.org\/schema\/task\"\n\txsi:schemaLocation=\"http:\/\/www.springframework.org\/schema\/aop http:\/\/www.springframework.org\/schema\/aop\/spring-aop-3.2.xsd http:\/\/www.springframework.org\/schema\/beans http:\/\/www.springframework.org\/schema\/beans\/spring-beans-3.2.xsd http:\/\/www.springframework.org\/schema\/context http:\/\/www.springframework.org\/schema\/context\/spring-context-3.2.xsd http:\/\/www.springframework.org\/schema\/jee http:\/\/www.springframework.org\/schema\/jee\/spring-jee-3.2.xsd http:\/\/www.springframework.org\/schema\/tx http:\/\/www.springframework.org\/schema\/tx\/spring-tx-3.2.xsd http:\/\/www.springframework.org\/schema\/task http:\/\/www.springframework.org\/schema\/task\/spring-task-3.2.xsd\">\n\n\t<bean id=\"simpleServiceBean\" class=\"com.javacodegeeks.snippets.enterprise.SimpleService\">\n\t\t<property name=\"name\" value=\"Hello\" \/>\n\t\t<property name=\"id\" value=\"12345\" \/>\n\t<\/bean>\n\n<bean id=\"doAroundMethodBean\"\n\t\tclass=\"com.javacodegeeks.snippets.enterprise.aop.DoAroundMethod\" \/>\n\n\t<bean id=\"simplePointcut\" class=\"org.springframework.aop.support.NameMatchMethodPointcut\">\n\t\t<property name=\"mappedName\" value=\"sayHello\" \/>\n\t<\/bean>\n\t<bean id=\"simpleAdvisor\" class=\"org.springframework.aop.support.DefaultPointcutAdvisor\">\n\t\t<property name=\"pointcut\" ref=\"simplePointcut\" \/>\n\t\t<property name=\"advice\" ref=\"doAroundMethodBean\" \/>\n\t<\/bean>\n\n\t<bean id=\"simpleServiceProxy\" class=\"org.springframework.aop.framework.ProxyFactoryBean\">\n\t\t<property name=\"target\" ref=\"simpleServiceBean\" \/>\n\t\t<property name=\"interceptorNames\">\n\t\t\t<list>\n\t\t\t\t<value>simpleAdvisor<\/value> \n\t\t\t<\/list>\n\t\t<\/property>\n\t<\/bean>\n<\/beans>\n<\/pre>\n
App.class<\/code> again. Now, only the sayHello(String message)<\/code> method is being intercepted.<\/p>\nSimpleService : Method printNameId() : My name is Hello and my id is 12345\n--------------\nSimpleService: Method checkName() exception thrown..\n--------------\n****SPRING AOP**** DoAroundMethod: Method name : sayHello\n****SPRING AOP**** DoAroundMethod: Method arguments : [Javacodegeeks]\n****SPRING AOP**** DoAroundMethod: Before method executing!\nSimpleService : Method sayHello() : Hello! Javacodegeeks\n****SPRING AOP**** DoAroundMethod: After method executing!<\/code><\/pre>\nNameMatchMethodPointcutAdvisor<\/code>, to combine both pointcut and advisor bean definitions in one bean, as shown below:<\/p>\n<beans xmlns=\"http:\/\/www.springframework.org\/schema\/beans\"\n\txmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\" xmlns:p=\"http:\/\/www.springframework.org\/schema\/p\"\n\txmlns:aop=\"http:\/\/www.springframework.org\/schema\/aop\" xmlns:context=\"http:\/\/www.springframework.org\/schema\/context\"\n\txmlns:jee=\"http:\/\/www.springframework.org\/schema\/jee\" xmlns:tx=\"http:\/\/www.springframework.org\/schema\/tx\"\n\txmlns:task=\"http:\/\/www.springframework.org\/schema\/task\"\n\txsi:schemaLocation=\"http:\/\/www.springframework.org\/schema\/aop http:\/\/www.springframework.org\/schema\/aop\/spring-aop-3.2.xsd http:\/\/www.springframework.org\/schema\/beans http:\/\/www.springframework.org\/schema\/beans\/spring-beans-3.2.xsd http:\/\/www.springframework.org\/schema\/context http:\/\/www.springframework.org\/schema\/context\/spring-context-3.2.xsd http:\/\/www.springframework.org\/schema\/jee http:\/\/www.springframework.org\/schema\/jee\/spring-jee-3.2.xsd http:\/\/www.springframework.org\/schema\/tx http:\/\/www.springframework.org\/schema\/tx\/spring-tx-3.2.xsd http:\/\/www.springframework.org\/schema\/task http:\/\/www.springframework.org\/schema\/task\/spring-task-3.2.xsd\">\n\n\t<bean id=\"simpleServiceBean\" class=\"com.javacodegeeks.snippets.enterprise.SimpleService\">\n\t\t<property name=\"name\" value=\"Hello\" \/>\n\t\t<property name=\"id\" value=\"12345\" \/>\n\t<\/bean>\n\n<bean id=\"doAroundMethodBean\"\n\t\tclass=\"com.javacodegeeks.snippets.enterprise.aop.DoAroundMethod\" \/>\n\t\n\t<bean id=\"simpleAdvisor\" class=\"org.springframework.aop.support.NameMatchMethodPointcutAdvisor\">\n\t\t<property name=\"mappedName\" value=\"sayHello\" \/>\n\t\t<property name=\"advice\" ref=\"doAroundMethodBean\" \/>\n\t<\/bean>\n\n\t<bean id=\"simpleServiceProxy\" class=\"org.springframework.aop.framework.ProxyFactoryBean\">\n\t\t<property name=\"target\" ref=\"simpleServiceBean\" \/>\n\t\t<property name=\"interceptorNames\">\n\t\t\t<list>\n\t\t\t\t<value>simpleAdvisor<\/value> \n\t\t\t<\/list>\n\t\t<\/property>\n\t<\/bean>\n<\/beans>\n<\/pre>\n
4.2 regex match pointcut<\/h3>\n
RegexpMethodPointcutAdvisor<\/code> type. The specific type of advisor has two properties. The patterns<\/code> property holds a list of the patterns that are used for selecting the methods by their names that will be intercepted and applied the advice code. Here, in regexAdvisor<\/code> we have used the *Hello*<\/code> pattern, so again the sayHello(String message)<\/code> method will be intercepted. The advice<\/code> property holds a reference to the bean of the advice.[ulp id=’7POIYxRf1FUtPpmL’]<\/p>\n<beans xmlns=\"http:\/\/www.springframework.org\/schema\/beans\"\n\txmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\" xmlns:p=\"http:\/\/www.springframework.org\/schema\/p\"\n\txmlns:aop=\"http:\/\/www.springframework.org\/schema\/aop\" xmlns:context=\"http:\/\/www.springframework.org\/schema\/context\"\n\txmlns:jee=\"http:\/\/www.springframework.org\/schema\/jee\" xmlns:tx=\"http:\/\/www.springframework.org\/schema\/tx\"\n\txmlns:task=\"http:\/\/www.springframework.org\/schema\/task\"\n\txsi:schemaLocation=\"http:\/\/www.springframework.org\/schema\/aop http:\/\/www.springframework.org\/schema\/aop\/spring-aop-3.2.xsd http:\/\/www.springframework.org\/schema\/beans http:\/\/www.springframework.org\/schema\/beans\/spring-beans-3.2.xsd http:\/\/www.springframework.org\/schema\/context http:\/\/www.springframework.org\/schema\/context\/spring-context-3.2.xsd http:\/\/www.springframework.org\/schema\/jee http:\/\/www.springframework.org\/schema\/jee\/spring-jee-3.2.xsd http:\/\/www.springframework.org\/schema\/tx http:\/\/www.springframework.org\/schema\/tx\/spring-tx-3.2.xsd http:\/\/www.springframework.org\/schema\/task http:\/\/www.springframework.org\/schema\/task\/spring-task-3.2.xsd\">\n\n\t<bean id=\"simpleServiceBean\" class=\"com.javacodegeeks.snippets.enterprise.SimpleService\">\n\t\t<property name=\"name\" value=\"Hello\" \/>\n\t\t<property name=\"id\" value=\"12345\" \/>\n\t<\/bean>\n\n<bean id=\"doAroundMethodBean\"\n\t\tclass=\"com.javacodegeeks.snippets.enterprise.aop.DoAroundMethod\" \/>\n\n\t<bean id=\"regexAdvisor\"\n\t\tclass=\"org.springframework.aop.support.RegexpMethodPointcutAdvisor\">\n\t\t<property name=\"patterns\">\n\t\t\t<list>\n\t\t\t\t<value>.*Hello.*<\/value>\n\t\t\t<\/list>\n\t\t<\/property>\n\t\t<property name=\"advice\" ref=\"doAroundMethodBean\" \/>\n\t<\/bean>\n\n\t<bean id=\"simpleServiceProxy\" class=\"org.springframework.aop.framework.ProxyFactoryBean\">\n\t\t<property name=\"target\" ref=\"simpleServiceBean\" \/>\n\t\t<property name=\"interceptorNames\">\n\t\t\t<list>\n\t\t\t\t<value>regexAdvisor<\/value>\n\t\t\t<\/list>\n\t\t<\/property>\n\t<\/bean>\n<\/beans>\n<\/pre>\n
App.java <\/code>class again we can see that only the method whose name matches the pattern *Hello*<\/code> is being intercepted by the advice. The result is shown below:<\/p>\nSimpleService : Method printNameId() : My name is Hello and my id is 12345\n--------------\nSimpleService: Method checkName() exception thrown..\n--------------\n****SPRING AOP**** DoAroundMethod: Method name : sayHello\n****SPRING AOP**** DoAroundMethod: Method arguments : [Javacodegeeks]\n****SPRING AOP**** DoAroundMethod: Before method executing!\nSimpleService : Method sayHello() : Hello! Javacodegeeks\n****SPRING AOP**** DoAroundMethod: After method executing!<\/code><\/pre>\n5. AOP interceptors sequence<\/h2>\n
interceptorNames<\/code> property of the proxy object can affect the sequence in which the advices intercept the methods. We create a new Around method advice, DoAroundMethod2.java<\/code> class and add it to applicationContext.xml<\/code> as shown below:<\/p>\npackage com.javacodegeeks.snippets.enterprise.aop;\n\n\timport java.util.Arrays;\n\t \n\timport org.aopalliance.intercept.MethodInterceptor;\n\timport org.aopalliance.intercept.MethodInvocation;\n\npublic class DoAroundMethod2 implements MethodInterceptor {\n\t\tpublic Object invoke(MethodInvocation methodInvocation) throws Throwable {\n\t \n\t\t\tSystem.out.println(\"****SPRING AOP**** DoAroundMethod 2: Method name : \"\n\t\t\t\t\t+ methodInvocation.getMethod().getName());\n\t\t\tSystem.out.println(\"****SPRING AOP**** DoAroundMethod 2: Method arguments : \"\n\t\t\t\t\t+ Arrays.toString(methodInvocation.getArguments()));\n\t\t\t\/\/ same with MethodBeforeAdvice\n\t\t\tSystem.out.println(\"****SPRING AOP**** DoAroundMethod 2: Before method executing!\");\n\t \n\t\t\ttry {\n\t\t\t\t\/\/ proceed to original method call\n\t\t\t\tObject result = methodInvocation.proceed();\n\t\t\t\t\/\/ same with AfterReturningAdvice\n\t\t\t\tSystem.out.println(\"****SPRING AOP**** DoAroundMethod 2: After method executing!\");\n\t\t\t\treturn result;\n\t \n\t\t\t} catch (IllegalArgumentException e) {\n\t\t\t\t\/\/ same with ThrowsAdvice\n\t\t\t\tSystem.out.println(\"****SPRING AOP**** DoAroundMethod 2: When method throws Exception!\");\n\t\t\t\tthrow e;\n\t\t\t}\n\t\t}\n\n}<\/pre>\n<beans xmlns=\"http:\/\/www.springframework.org\/schema\/beans\"\n\txmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\" xmlns:p=\"http:\/\/www.springframework.org\/schema\/p\"\n\txmlns:aop=\"http:\/\/www.springframework.org\/schema\/aop\" xmlns:context=\"http:\/\/www.springframework.org\/schema\/context\"\n\txmlns:jee=\"http:\/\/www.springframework.org\/schema\/jee\" xmlns:tx=\"http:\/\/www.springframework.org\/schema\/tx\"\n\txmlns:task=\"http:\/\/www.springframework.org\/schema\/task\"\n\txsi:schemaLocation=\"http:\/\/www.springframework.org\/schema\/aop http:\/\/www.springframework.org\/schema\/aop\/spring-aop-3.2.xsd http:\/\/www.springframework.org\/schema\/beans http:\/\/www.springframework.org\/schema\/beans\/spring-beans-3.2.xsd http:\/\/www.springframework.org\/schema\/context http:\/\/www.springframework.org\/schema\/context\/spring-context-3.2.xsd http:\/\/www.springframework.org\/schema\/jee http:\/\/www.springframework.org\/schema\/jee\/spring-jee-3.2.xsd http:\/\/www.springframework.org\/schema\/tx http:\/\/www.springframework.org\/schema\/tx\/spring-tx-3.2.xsd http:\/\/www.springframework.org\/schema\/task http:\/\/www.springframework.org\/schema\/task\/spring-task-3.2.xsd\">\n\n\t<bean id=\"simpleServiceBean\" class=\"com.javacodegeeks.snippets.enterprise.SimpleService\">\n\t\t<property name=\"name\" value=\"Hello\" \/>\n\t\t<property name=\"id\" value=\"12345\" \/>\n\t<\/bean>\n\n\t<bean id=\"doAroundMethodBean\" class=\"com.javacodegeeks.snippets.enterprise.aop.DoAroundMethod\" \/>\n\n\t<bean id=\"doAroundMethod2Bean\" class=\"com.javacodegeeks.snippets.enterprise.aop.DoAroundMethod2\" \/>\n\n\t<bean id=\"simpleServiceProxy\" class=\"org.springframework.aop.framework.ProxyFactoryBean\">\n\t\t<property name=\"target\" ref=\"simpleServiceBean\" \/>\n\t\t<property name=\"interceptorNames\">\n\t\t\t<list>\n\t\t\t\t<value>doAroundMethodBean<\/value>\n\t\t\t\t<value>doAroundMethod2Bean<\/value>\n\t\t\t<\/list>\n\t\t<\/property>\n\t<\/bean>\n<\/beans>\n<\/pre>\n
simpleServiceProxy<\/code> is the one that intercepts the methods first.<\/p>\n****SPRING AOP**** DoAroundMethod: Method name : printNameId\n****SPRING AOP**** DoAroundMethod: Method arguments : []\n****SPRING AOP**** DoAroundMethod: Before method executing!\n****SPRING AOP**** DoAroundMethod 2: Method name : printNameId\n****SPRING AOP**** DoAroundMethod 2: Method arguments : []\n****SPRING AOP**** DoAroundMethod 2: Before method executing!\nSimpleService : Method printNameId() : My name is Hello and my id is 12345\n****SPRING AOP**** DoAroundMethod 2: After method executing!\n****SPRING AOP**** DoAroundMethod: After method executing!\n--------------\n****SPRING AOP**** DoAroundMethod: Method name : checkName\n****SPRING AOP**** DoAroundMethod: Method arguments : []\n****SPRING AOP**** DoAroundMethod: Before method executing!\n****SPRING AOP**** DoAroundMethod 2: Method name : checkName\n****SPRING AOP**** DoAroundMethod 2: Method arguments : []\n****SPRING AOP**** DoAroundMethod 2: Before method executing!\n****SPRING AOP**** DoAroundMethod 2: When method throws Exception!\n****SPRING AOP**** DoAroundMethod: When method throws Exception!\nSimpleService: Method checkName() exception thrown..\n--------------\n****SPRING AOP**** DoAroundMethod: Method name : sayHello\n****SPRING AOP**** DoAroundMethod: Method arguments : [Javacodegeeks]\n****SPRING AOP**** DoAroundMethod: Before method executing!\n****SPRING AOP**** DoAroundMethod 2: Method name : sayHello\n****SPRING AOP**** DoAroundMethod 2: Method arguments : [Javacodegeeks]\n****SPRING AOP**** DoAroundMethod 2: Before method executing!\nSimpleService : Method sayHello() : Hello! Javacodegeeks\n****SPRING AOP**** DoAroundMethod 2: After method executing!\n****SPRING AOP**** DoAroundMethod: After method executing!<\/code><\/pre>\nsimpleServiceProxy<\/code> bean and see what happens:<\/p>\n<beans xmlns=\"http:\/\/www.springframework.org\/schema\/beans\"\n\txmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\" xmlns:p=\"http:\/\/www.springframework.org\/schema\/p\"\n\txmlns:aop=\"http:\/\/www.springframework.org\/schema\/aop\" xmlns:context=\"http:\/\/www.springframework.org\/schema\/context\"\n\txmlns:jee=\"http:\/\/www.springframework.org\/schema\/jee\" xmlns:tx=\"http:\/\/www.springframework.org\/schema\/tx\"\n\txmlns:task=\"http:\/\/www.springframework.org\/schema\/task\"\n\txsi:schemaLocation=\"http:\/\/www.springframework.org\/schema\/aop http:\/\/www.springframework.org\/schema\/aop\/spring-aop-3.2.xsd http:\/\/www.springframework.org\/schema\/beans http:\/\/www.springframework.org\/schema\/beans\/spring-beans-3.2.xsd http:\/\/www.springframework.org\/schema\/context http:\/\/www.springframework.org\/schema\/context\/spring-context-3.2.xsd http:\/\/www.springframework.org\/schema\/jee http:\/\/www.springframework.org\/schema\/jee\/spring-jee-3.2.xsd http:\/\/www.springframework.org\/schema\/tx http:\/\/www.springframework.org\/schema\/tx\/spring-tx-3.2.xsd http:\/\/www.springframework.org\/schema\/task http:\/\/www.springframework.org\/schema\/task\/spring-task-3.2.xsd\">\n\n\t<bean id=\"simpleServiceBean\" class=\"com.javacodegeeks.snippets.enterprise.SimpleService\">\n\t\t<property name=\"name\" value=\"Hello\" \/>\n\t\t<property name=\"id\" value=\"12345\" \/>\n\t<\/bean>\n\n\t<bean id=\"doAroundMethodBean\" class=\"com.javacodegeeks.snippets.enterprise.aop.DoAroundMethod\" \/>\n\n\t<bean id=\"doAroundMethod2Bean\" class=\"com.javacodegeeks.snippets.enterprise.aop.DoAroundMethod2\" \/>\n\n\t<bean id=\"simpleServiceProxy\" class=\"org.springframework.aop.framework.ProxyFactoryBean\">\n\t\t<property name=\"target\" ref=\"simpleServiceBean\" \/>\n\t\t<property name=\"interceptorNames\">\n\t\t\t<list>\n\t\t\t\t<value>doAroundMethod2Bean<\/value>\n\t\t\t\t<value>doAroundMethodBean<\/value>\n\t\t\t<\/list>\n\t\t<\/property>\n\t<\/bean>\n<\/beans>\n<\/pre>\n
****SPRING AOP**** DoAroundMethod 2: Method name : printNameId\n****SPRING AOP**** DoAroundMethod 2: Method arguments : []\n****SPRING AOP**** DoAroundMethod 2: Before method executing!\n****SPRING AOP**** DoAroundMethod: Method name : printNameId\n****SPRING AOP**** DoAroundMethod: Method arguments : []\n****SPRING AOP**** DoAroundMethod: Before method executing!\nSimpleService : Method printNameId() : My name is Hello and my id is 12345\n****SPRING AOP**** DoAroundMethod: After method executing!\n****SPRING AOP**** DoAroundMethod 2: After method executing!\n--------------\n****SPRING AOP**** DoAroundMethod 2: Method name : checkName\n****SPRING AOP**** DoAroundMethod 2: Method arguments : []\n****SPRING AOP**** DoAroundMethod 2: Before method executing!\n****SPRING AOP**** DoAroundMethod: Method name : checkName\n****SPRING AOP**** DoAroundMethod: Method arguments : []\n****SPRING AOP**** DoAroundMethod: Before method executing!\n****SPRING AOP**** DoAroundMethod: When method throws Exception!\n****SPRING AOP**** DoAroundMethod 2: When method throws Exception!\nSimpleService: Method checkName() exception thrown..\n--------------\n****SPRING AOP**** DoAroundMethod 2: Method name : sayHello\n****SPRING AOP**** DoAroundMethod 2: Method arguments : [Javacodegeeks]\n****SPRING AOP**** DoAroundMethod 2: Before method executing!\n****SPRING AOP**** DoAroundMethod: Method name : sayHello\n****SPRING AOP**** DoAroundMethod: Method arguments : [Javacodegeeks]\n****SPRING AOP**** DoAroundMethod: Before method executing!\nSimpleService : Method sayHello() : Hello! Javacodegeeks\n****SPRING AOP**** DoAroundMethod: After method executing!\n****SPRING AOP**** DoAroundMethod 2: After method executing!<\/code><\/pre>\n6. AOP auto proxy creators<\/h2>\n
6.1 BeanNameAutoProxyCreator<\/h3>\n
BeanNameAutoProxyCreator<\/code> that automatically creates AOP proxies for beans with names matching literal values or wildcards. In order to use it we must define it in applicationContext.xml<\/code>. This creator exposes two properties for us to configure. The first property is beanNames<\/code> and its value is a list of regular expressions matching the Spring bean names (ids) to be proxied. The second property is interceptorNames<\/code> and its value is a list of the advisors (Spring bean ids) that will be used.<\/p>\n<beans xmlns=\"http:\/\/www.springframework.org\/schema\/beans\"\n\txmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\" xmlns:p=\"http:\/\/www.springframework.org\/schema\/p\"\n\txmlns:aop=\"http:\/\/www.springframework.org\/schema\/aop\" xmlns:context=\"http:\/\/www.springframework.org\/schema\/context\"\n\txmlns:jee=\"http:\/\/www.springframework.org\/schema\/jee\" xmlns:tx=\"http:\/\/www.springframework.org\/schema\/tx\"\n\txmlns:task=\"http:\/\/www.springframework.org\/schema\/task\"\n\txsi:schemaLocation=\"http:\/\/www.springframework.org\/schema\/aop http:\/\/www.springframework.org\/schema\/aop\/spring-aop-3.2.xsd http:\/\/www.springframework.org\/schema\/beans http:\/\/www.springframework.org\/schema\/beans\/spring-beans-3.2.xsd http:\/\/www.springframework.org\/schema\/context http:\/\/www.springframework.org\/schema\/context\/spring-context-3.2.xsd http:\/\/www.springframework.org\/schema\/jee http:\/\/www.springframework.org\/schema\/jee\/spring-jee-3.2.xsd http:\/\/www.springframework.org\/schema\/tx http:\/\/www.springframework.org\/schema\/tx\/spring-tx-3.2.xsd http:\/\/www.springframework.org\/schema\/task http:\/\/www.springframework.org\/schema\/task\/spring-task-3.2.xsd\">\n\n\t<bean id=\"simpleServiceBean\" class=\"com.javacodegeeks.snippets.enterprise.SimpleService\">\n\t\t<property name=\"name\" value=\"Hello\" \/>\n\t\t<property name=\"id\" value=\"12345\" \/>\n\t<\/bean>\n\n\t<bean id=\"doAroundMethodBean\" class=\"com.javacodegeeks.snippets.enterprise.aop.DoAroundMethod\" \/>\n\n\t<bean id=\"simplePointcut\" class=\"org.springframework.aop.support.NameMatchMethodPointcut\">\n\t\t<property name=\"mappedName\" value=\"sayHello\" \/>\n\t<\/bean>\n\n\t<bean id=\"simpleAdvisor\" class=\"org.springframework.aop.support.NameMatchMethodPointcutAdvisor\">\n\t\t<property name=\"mappedName\" value=\"sayHello\" \/>\n\t\t<property name=\"advice\" ref=\"doAroundMethodBean\" \/>\n\t<\/bean>\n\t<bean class=\"org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator\">\n\t\t<property name=\"beanNames\">\n\t\t\t<list>\n\t\t\t\t<value>*ServiceBean<\/value>\n\t\t\t<\/list>\n\t\t<\/property>\n\t\t<property name=\"interceptorNames\">\n\t\t\t<list>\n\t\t\t\t<value>simpleAdvisor<\/value>\n\t\t\t<\/list>\n\t\t<\/property>\n\t<\/bean>\n<\/beans>\n<\/pre>\n
simpleServiceBean<\/code> in App.java<\/code> class, without having to know if this bean has a proxy object or not. The BeanNameAutoProxyCreator<\/code> will load the proxy.
\nApp.java<\/em><\/span><\/p>\npackage com.javacodegeeks.snippets.enterprise;\n\nimport org.springframework.context.ConfigurableApplicationContext;\nimport org.springframework.context.support.ClassPathXmlApplicationContext;\n\npublic class App {\n\n\tpublic static void main(String[] args) {\n\t\n\t\t\tConfigurableApplicationContext context = new ClassPathXmlApplicationContext(\"applicationContext.xml\");\n\t\t\tSimpleService simpleService = (SimpleService) context.getBean(\"simpleServiceBean\");\n\t\t\tsimpleService.printNameId();\n\t\t\tSystem.out.println(\"--------------\");\n\t\t\ttry{\n\t\t\t\tsimpleService.checkName();\n\t\t\t} catch(Exception e){\n\t\t\t\tSystem.out.println(\"SimpleService: Method checkName() exception thrown..\");\n\t\t\t}\n\t\t\tSystem.out.println(\"--------------\");\n\t\t\tsimpleService.sayHello(\"Javacodegeeks\");\n\t\t\tcontext.close();\n\t}\n}\n<\/pre>\n
\nOutput<\/em><\/span><\/p>\nSimpleService : Method printNameId() : My name is Hello and my id is 12345\n--------------\nSimpleService: Method checkName() exception thrown..\n--------------\n****SPRING AOP**** DoAroundMethod: Method name : sayHello\n****SPRING AOP**** DoAroundMethod: Method arguments : [Javacodegeeks]\n****SPRING AOP**** DoAroundMethod: Before method executing!\nSimpleService : Method sayHello() : Hello! Javacodegeeks\n****SPRING AOP**** DoAroundMethod: After method executing!<\/code><\/pre>\n6.2 DefaultAdvisorAutoProxyCreator<\/h3>\n
DefaultAdvisorAutoProxyCreator<\/code> that automatically applies advisors in the current applicationContext.xml<\/code>, without the need to include specific bean names in the auto-proxy advisor’s bean definition. In order to use it we must specify a DefaultAdvisorAutoProxyCreator<\/code> bean definition in applicationContext.xml<\/code>. Then we must specify any number of advisors in the same or related configuration files. The DefaultAdvisorAutoProxyCreator<\/code> will automatically evaluate the pointcut contained in each advisor, to see what (if any) advice it should apply to each object.<\/p>\n<beans xmlns=\"http:\/\/www.springframework.org\/schema\/beans\"\n\txmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\" xmlns:p=\"http:\/\/www.springframework.org\/schema\/p\"\n\txmlns:aop=\"http:\/\/www.springframework.org\/schema\/aop\" xmlns:context=\"http:\/\/www.springframework.org\/schema\/context\"\n\txmlns:jee=\"http:\/\/www.springframework.org\/schema\/jee\" xmlns:tx=\"http:\/\/www.springframework.org\/schema\/tx\"\n\txmlns:task=\"http:\/\/www.springframework.org\/schema\/task\"\n\txsi:schemaLocation=\"http:\/\/www.springframework.org\/schema\/aop http:\/\/www.springframework.org\/schema\/aop\/spring-aop-3.2.xsd http:\/\/www.springframework.org\/schema\/beans http:\/\/www.springframework.org\/schema\/beans\/spring-beans-3.2.xsd http:\/\/www.springframework.org\/schema\/context http:\/\/www.springframework.org\/schema\/context\/spring-context-3.2.xsd http:\/\/www.springframework.org\/schema\/jee http:\/\/www.springframework.org\/schema\/jee\/spring-jee-3.2.xsd http:\/\/www.springframework.org\/schema\/tx http:\/\/www.springframework.org\/schema\/tx\/spring-tx-3.2.xsd http:\/\/www.springframework.org\/schema\/task http:\/\/www.springframework.org\/schema\/task\/spring-task-3.2.xsd\">\n\n\t<bean id=\"simpleServiceBean\" class=\"com.javacodegeeks.snippets.enterprise.SimpleService\">\n\t\t<property name=\"name\" value=\"Hello\" \/>\n\t\t<property name=\"id\" value=\"12345\" \/>\n\t<\/bean>\n\n\t<bean id=\"doAroundMethodBean\" class=\"com.javacodegeeks.snippets.enterprise.aop.DoAroundMethod\" \/>\n\n\n\t<bean id=\"simplePointcut\" class=\"org.springframework.aop.support.NameMatchMethodPointcut\">\n\t\t<property name=\"mappedName\" value=\"sayHello\" \/>\n\t<\/bean>\n\n\t<bean id=\"simpleAdvisor\" class=\"org.springframework.aop.support.NameMatchMethodPointcutAdvisor\">\n\t\t<property name=\"mappedName\" value=\"sayHello\" \/>\n\t\t<property name=\"advice\" ref=\"doAroundMethodBean\" \/>\n\t<\/bean>\n\t\n\t<bean class=\"org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator\" \/>\n\n<\/beans>\n<\/pre>\n
App.java<\/code> class again the result is shown below:<\/p>\nSimpleService : Method printNameId() : My name is Hello and my id is 12345\n--------------\nSimpleService: Method checkName() exception thrown..\n--------------\n****SPRING AOP**** DoAroundMethod: Method name : sayHello\n****SPRING AOP**** DoAroundMethod: Method arguments : [Javacodegeeks]\n****SPRING AOP**** DoAroundMethod: Before method executing!\nSimpleService : Method sayHello() : Hello! Javacodegeeks\n****SPRING AOP**** DoAroundMethod: After method executing!<\/code><\/pre>\n
\nThis was an example of Aspect Oriented Programming in Spring.
\nDownload the Eclipse project of this tutorial : SpringAOPExample.zip<\/a><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"