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spring.brief.html
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<!doctype html>
<html lang="en" xmlns:util="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8">
<title>Spring Introduction</title>
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<link rel="stylesheet" href="css/reveal.css">
<link rel="stylesheet" href="css/theme/sky.css" id="theme">
<!-- Theme used for syntax highlighting of code -->
<link rel="stylesheet" href="lib/css/github.css">
<!-- Printing and PDF exports -->
<script>
var link = document.createElement( 'link' );
link.rel = 'stylesheet';
link.type = 'text/css';
link.href = window.location.search.match( /print-pdf/gi ) ? 'css/print/pdf.css' : 'css/print/paper.css';
document.getElementsByTagName( 'head' )[0].appendChild( link );
</script>
<!--[if lt IE 9]>
<script src="lib/js/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<div class="reveal">
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<section>
<h1>Spring Introduction</h1>
<h3>Spring Framework Brief</h3>
<p>
<small>Created by <i>Kevin Feng</i></small>
</p>
</section>
<section>
<section>
<h2>Spring Framework</h2>
<p>The Spring Framework is a lightweight solution and a potential one-stop-shop for building your enterprise-ready applications.</p>
<ul>
<li>modular</li>
<li>non-intrusive</li>
<li>...</li>
</ul>
</section>
<section>
<h3>Spring Framework 3.x Overview</h3>
<img src="img/spring-overview-3.png">
</section>
</section>
<section>
<section>
<h2>Spring Framework Usage</h2>
</section>
<section>
<h3>Spring Core</h3>
<ul>
<li>OLP</li>
<li>SFP</li>
<li>MIF</li>
<li>...</li>
</ul>
</section>
<section>
<h3>Spring DAO</h3>
<ul>
<li>OLP</li>
<li>IR4 use PFW instead</li>
</ul>
</section>
<section>
<h3>Spring Web</h3>
<ul>
<li>JAX-RS instead</li>
<li>SOA</li>
</ul>
</section>
<section>
<h3>Spring AOP</h3>
<ul>
<li>OLP</li>
</ul>
</section>
<section>
<h3>Spring Test</h3>
<ul>
<li>OLP</li>
<li>Junit 3/4 directly</li>
</ul>
</section>
</section>
<section>
<section>
<h2>Inversion of Control</h2>
<h3>(Dependency Injection)</h3>
<img src="img/ioc.png">
</section>
<section>
<h2>IoC/DI</h2>
<p>IoC (DI) is a process whereby objects define their dependencies, the container then injects those dependencies when it creates the bean.</p>
</section>
<section>
<h2>Dependency Injection</h2>
<ul>
<li>Interface Injection</li>
<li>Constructor Injection</li>
<li>Setter Injection</li>
</ul>
</section>
<section>
<h2>Dependency Injection</h2>
<pre><code class="hljs" data-trim contenteditable>
class MovieLister...
public Movie[] moviesDirectedBy(String arg) {
List allMovies = finder.findAll();
for (Iterator it = allMovies.iterator(); it.hasNext();) {
Movie movie = (Movie) it.next();
if (!movie.getDirector().equals(arg)) it.remove();
}
return (Movie[]) allMovies.toArray(new Movie[allMovies.size()]);
}
</code></pre>
<p>The <span style="color:red">finder</span></p>
<pre><code class="hljs" data-trim contenteditable>
public interface MovieFinder {
List findAll();
}
</code></pre>
</section>
<section>
<h2>Interface Injection</h2>
<p>component</p>
<pre><code class="hljs" data-trim contenteditable>
public interface InjectFinder {
void injectFinder(MovieFinder finder);
}
class MovieLister implements InjectFinder
public void injectFinder(MovieFinder finder) {
this.finder = finder;
}
</code></pre>
<p>component & injector</p>
<pre><code class="hljs" data-trim contenteditable>
public interface Injector {
public void inject(Object target);
}
class ColonMovieFinder implements MovieFinder, Injector...
public void inject(Object target) {
((InjectFinder) target).injectFinder(this);
}
</code></pre>
</section>
<section>
<h2>Interface Injection</h2>
<pre><code class="hljs" data-trim contenteditable>
class Tester...
private Container container;
private void configureContainer() {
container = new Container();
//register components
container.registerComponent("MovieLister", MovieLister.class);
container.registerComponent("MovieFinder", ColonMovieFinder.class);
//register injectors
container.registerInjector(InjectFinder.class, container.lookup("MovieFinder"));
}
public void testIface() {
configureContainer();
MovieLister lister = (MovieLister)container.lookup("MovieLister");
Movie[] movies = lister.moviesDirectedBy("Sergio Leone");
assertEquals("Once Upon a Time in the West", movies[0].getTitle());
}
</code></pre>
</section>
<section>
<h2>Constructor Injection</h2>
<pre><code class="hljs" data-trim contenteditable>
class MovieLister...
public MovieLister(MovieFinder finder) {
this.finder = finder;
}
class ColonMovieFinder...
public ColonMovieFinder() {
}
</code></pre>
<pre><code class="hljs" data-trim contenteditable>
class Tester...
private void configureContainer() {
container = new Container();
container.registerComponentImplementation(MovieFinder.class, ColonMovieFinder.class);
container.registerComponentImplementation(MovieLister.class);
}
public void testIface() {
configureContainer();
MovieLister lister = (MovieLister) container.getComponentInstance(MovieLister.class);
Movie[] movies = lister.moviesDirectedBy("Sergio Leone");
assertEquals("Once Upon a Time in the West", movies[0].getTitle());
}
</code></pre>
</section>
<section>
<h2>Setter Injection</h2>
<pre><code class="hljs" data-trim contenteditable>
class MovieLister...
private MovieFinder finder;
public void setFinder(MovieFinder finder) {
this.finder = finder;
}
class ColonMovieFinder...
</code></pre>
<pre><code class="hljs" data-trim contenteditable>
class Tester...
private void configureContainer() {
container = new Container();
Component movieFinder = container.registerComponent(ColonMovieFinder.class);
Component movieLister = container.registerComponent(MovieLister.class);
movieLister.setProperty("finder", movieFinder);
}
public void testIface() {
configureContainer();
MovieLister lister = (MovieLister) container.getComponent(MovieLister.class);
Movie[] movies = lister.moviesDirectedBy("Sergio Leone");
assertEquals("Once Upon a Time in the West", movies[0].getTitle());
}
</code></pre>
</section>
<section>
<h2>Conclusion</h2>
<p>Interface Injection</p>
<ul>
<li>invasive</li>
</ul>
<p>Constructor Injection</p>
<ul>
<li>valid objects at construction time</li>
<li>immutable state/fields</li>
<li>ordered injection</li>
</ul>
<p>Setter Injection</p>
<ul>
<li>mess with multiple constructors/ simple type/ inheritance</li>
<li>required by 3rd lib with provided constructors</li>
</ul>
</section>
</section>
<section>
<section>
<h2>Spring Ioc/DI</h2>
<p>Container in Spring: <u>ApplicationContext</u></p>
<p>Object in Spring: <u>Bean</u></p>
</section>
<section>
<h2>Application Context</h2>
<b>Configuration Metadata:</b>
<p>Xml based application context </p>
<p>Annotation based context</p>
<p>Java based context</p>
<p>...</p>
</section>
<section>
<h3>Xml based</h3>
<pre><code class="hljs" data-trim contenteditable>
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="..." class="...">
<!-- collaborators and configuration for this bean go here -->
</bean>
<bean id="..." class="...">
<!-- collaborators and configuration for this bean go here -->
</bean>
<!-- more bean definitions go here -->
<import resource="services.xml"></import>
</beans>
</code></pre>
<pre><code class="hljs" data-trim contenteditable>
ApplicationContext context = new ClassPathXmlApplicationContext("config.xml");
</code></pre>
<pre><code class="hljs" data-trim contenteditable>
ApplicationContext context = new FileSystemXmlApplicationContext("config.xml");
</code></pre>
</section>
<section>
<h3>Annotation Based</h3>
<pre><code class="hljs" data-trim contenteditable>
@Service
@Scope("prototype")
public class MessagePrinter {
final private MessageService service;
@Autowired
public MessagePrinter(MessageService service) {
this.service = service;
}
public void printMessage() {
count++;
System.out.println(this.service.getMessage());
}
}
</code></pre>
<p>@Component</p>
<p>@Repository @Service @Controller</p>
</section>
<section>
<h3>Java based</h3>
<pre><code class="hljs" data-trim contenteditable>
@Configuration
@ComponentScan(basePackages = "com.oocl.frm.demo.spring.annotated")
public class Application {
@Bean
MessageService mockMessageService() {
return () -> "Hello World!";
}
public static void main(String[] args) {
ApplicationContext context = new AnnotationConfigApplicationContext(Application.class);
MessageService service = context.getBean(MessageService.class);
}
}
</code></pre>
</section>
</section>
<section>
<section>
<h2>Bean Definition</h2>
<ul>
<li>id</li>
<li>name</li>
<li>scope</li>
<li>constructor</li>
<li>property</li>
<li>autowiring mode</li>
<li>lazy-initialization mode</li>
<li>initialization method</li>
<li>destruction method</li>
</ul>
</section>
<section>
<h3>Example</h3>
<pre><code class="hljs" data-trim contenteditable>
<bean id="exBean" name="exBean1 exBean2 exBean3" class="com.oocl.frm.demo.spring.beans.ExBean"
lazy-init="true" scope="prototype" init-method="init" destroy-method="destroy" autowire="byName">
<constructor-arg index="0" value="key1"></constructor-arg>
<constructor-arg index="1" value="2"></constructor-arg>
<property name="desc" value="Description"></property>
</bean>
</code></pre>
<pre><code class="hljs" data-trim contenteditable>
<bean class="com.oocl.frm.demo.spring.beans.ExBean" c:key="key0" c:_1="3" p:desc="test"></bean>
</code></pre>
</section>
<section>
<h3>scope</h3>
<p>prototype</p>
<p>singleton</p>
<p>request</p>
<p>session</p>
<p>global session</p>
<p>customized scope</p>
<b>Scope with dependencies?</b>
</section>
<section>
<h3>Autowiring</h3>
<p>no</p>
<p>byName</p>
<p>byType</p>
<p>constructor</p>
<b>Limitations</b>
</section>
<section>
<h3>initialization method</h3>
<b>Initialization Order</b>
<p>@PostConstruct</p>
<p>InitializingBean</p>
<p>init-method</p>
</section>
<section>
<h3>destruction method</h3>
<b>Destruction Order</b>
<p>@PreDestroy</p>
<p>DisposableBean</p>
<p>destroy-method</p>
</section>
<section>
<h3>depends-on</h3>
<p>explicit initialization dependency</p>
</section>
<section>
<h3>Factory</h3>
<p>factory-method</p>
<pre><code class="hljs" data-trim contenteditable>
<bean id="color" class="com.oocl.frm.demo.spring.beans.ColorBean" factory-method="getStaticInstance"></bean>
</code></pre>
<p>factory-bean</p>
<pre><code class="hljs" data-trim contenteditable>
<bean id="colorFactory" class="com.oocl.frm.demo.spring.beans.ColorFactory" factory-method="getFactory"></bean>
<bean class="com.oocl.frm.demo.spring.beans.ColorBean" factory-bean="colorFactory"
factory-method="createColorBean"></bean>
</code></pre>
</section>
<section>
<h3>Method Injection</h3>
<p>Lookup Method</p>
<p>Method Replacement</p>
<pre><code class="hljs" data-trim contenteditable>
<bean id="red" class="com.oocl.frm.demo.spring.beans.ColorBean">
<property name="color" value="red"></property>
</bean>
<bean id="color" class="com.oocl.frm.demo.spring.beans.ColorBean">
<property name="color" value="blue"></property>
<lookup-method name="getBean" bean="red"></lookup-method>
<replaced-method name="printColor" replacer="brush"></replaced-method>
</bean>
<bean id="brush" class="com.oocl.frm.demo.spring.beans.Brush"></bean>
</code></pre>
</section>
<section>
<h3>component-scan</h3>
<pre><code class="hljs" data-trim contenteditable>
<context:component-scan base-package="com.oocl.frm.demo.spring.beans">
<context:include-filter type="regex" expression=".*Stub.*Repository"></context:include-filter>
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Repository"></context:exclude-filter>
</context:component-scan>
</code></pre>
</section>
<section>
<h3>import</h3>
<pre><code class="hljs" data-trim contenteditable>
<import resource="template*.xml"/></code></pre>
</section>
<section>
<h3>place holder</h3>
<pre><code class="hljs" data-trim contenteditable>
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="ignoreUnresolvablePlaceholders" value="true"></property>
<property name="location" value="classpath:env.properties"></property>
</bean>
</code></pre>
<pre><code class="hljs" data-trim contenteditable>
<context:property-placeholder ignore-unresolvable="true" location="classpath:env.properties"/></code></pre>
</section>
</section>
<section>
<section>
<h2>LifeCycle</h2>
<ul>
<li>Construct</li>
<li>Aware</li>
<li>BeanPostProcessor</li>
<li>Initialization</li>
<li>Destruction</li>
</ul>
</section>
</section>
<section>
<h2>Annotation Based</h2>
<pre><code class="hljs" data-trim contenteditable>
<context:annotation-config/></code></pre>
<ul>
<li>@Resource</li>
<li>@Autowired</li>
<li>@Required</li>
<li>@Qualifier</li>
</ul>
</section>
<section>
<h2>Java Based</h2>
<ul>
<li>@Configuration</li>
<li>@Bean</li>
<li>@Import</li>
<li>@ComponentScan</li>
</ul>
</section>
<section>
<section>
<h2>Util Set & Misc</h2>
</section>
<section>
<h2>Collections</h2>
<pre><code class="hljs" data-trim contenteditable>
<bean id="map1" class="java.util.HashMap">
<constructor-arg>
<map>
<entry key="aa" value="bb"></entry>
<entry key="aa1" value="bb3"></entry>
<entry key="aa2" value="bb6"></entry>
</map>
</constructor-arg>
</bean>
</code></pre>
<pre><code class="hljs" data-trim contenteditable>
<util:map id="map2">
<entry key="aa" value="bb"></entry>
<entry key="aa1" value="bb3"></entry>
<entry key="aa2" value="bb6"></entry>
</util:map>
</code></pre>
<pre><code class="hljs" data-trim contenteditable>
<bean class="com.oocl.frm.demo.spring.beans.RefBean">
<property name="refValue">
<list>
<value>v1</value>
<value>v2</value>
<value>v3</value>
</list>
</property>
</bean>
</code></pre>
</section>
<section>
<h2>Constant</h2>
<pre><code class="hljs" data-trim contenteditable>
<util:constant id="const1" static-field="com.oocl.frm.demo.spring.beans.RefBean.REF_2"></util:constant>
<bean class="com.oocl.frm.demo.spring.beans.RefBean">
<property name="ref" ref="const1"></property>
</bean>
</code></pre>
<pre><code class="hljs" data-trim contenteditable>
<bean class="com.oocl.frm.demo.spring.beans.RefBean">
<property name="ref">
<util:constant id="const1" static-field="com.oocl.frm.demo.spring.beans.RefBean.REF_2"></util:constant>
</property>
</bean>
</code></pre>
</section>
<section>
<h2>Enum</h2>
<pre><code class="hljs" data-trim contenteditable>
<bean class="com.oocl.frm.demo.spring.beans.RefBean">
<property name="refEnum" value="ENUM_2"></property>
</bean>
</code></pre>
<pre><code class="hljs" data-trim contenteditable>
<bean id="enum1" class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean">
<property name="staticField" value="com.oocl.frm.demo.spring.beans.RefEnum.ENUM_1"></property>
</bean>
</code></pre>
</section>
</section>
<section>
<h2>Pros & Cons</h2>
<b>Pros:</b>
<p>Dependency Injection</p>
<p>Decouple</p>
<p>Easier testing</p>
<p>etc.</p>
<b>Cons:</b>
<p>Exception at runtime</p>
<p>Hard to debug</p>
</section>
<section>
<section>
<h2>Spring AOP</h2>
</section>
<section>
<h3>Aspect-Oriented Programming</h3>
<img src="img/aop.jpg"/>
</section>
<section>
<h3>AOP Concepts</h3>
<ul>
<li>Aspect</li>
<li>Join point</li>
<ol>method execution in Spring</ol>
<li>Advice</li>
<li>Pointcut</li>
<li>Introduction</li>
<li>Target/Advised/Proxied object</li>
<li>AOP proxy</li>
<ol>JDK dynamic proxy/ CGLIB proxy</ol>
<li>Weaving</li>
<ol>at compile time/ load time/ <u>runtime</u></ol>
</ul>
</section>
<section>
<h3>Types of Advice</h3>
<ul>
<li>Before advice</li>
<li>After returning advice</li>
<li>After throwing advice</li>
<li>After (finally) advice</li>
<li>Around advice</li>
</ul>
</section>
<section>
<h3>AOP Proxy</h3>
<p><img src="img/pojo-call.png"></p>
<p><img src="img/pojo-proxy.png"></p>
</section>
</section>
<section>
<section>
<h2>@AspectJ support</h2>
</section>
<section>
<h3>Enable @AspectJ support</h3>
<p>Java based</p>
<pre><code class="hljs" data-trim contenteditable>
@Configuration
@EnableAspectJAutoProxy
public class Application {
}
</code></pre>
<p>Xml based</p>
<pre><code class="hljs" data-trim contenteditable>
<aop:aspectj-autoproxy/></code></pre>
</section>
<section>
<h3>Declaring an aspect</h3>
<pre><code class="hljs" data-trim contenteditable>
<bean class="com.oocl.frm.demo.spring.aop.TestAnnotatedAspect"/></code></pre>
<pre><code class="hljs" data-trim contenteditable>
@Aspect
public class TestAnnotatedAspect {
}
</code></pre>
</section>
<section>
<h3>Declaring an pointcut</h3>
<pre><code class="hljs" data-trim contenteditable>
@Pointcut(value = "execution(* com.oocl.frm.demo.spring.aop.TestAction.*(..))")
public void testCutoff() {
}
</code></pre>
</section>
<section>
<h3>Pointcut designators supported</h3>
<ul>
<li><em>execution</em> - matching method</li>
<li><em>within</em> - limits matching within certain types</li>
<li><em>this</em> - limits the proxy object to the given type</li>
<li><em>target</em> - limits the target object to the given type</li>
<li><em>args</em> - limits the arguments to the given types</li>
<li><em>@target</em> - limits the class of the executing object has an annotation of the given type </li>
<li><em>@args</em> - limits the actual arguments passed have annotations of the given type(s) </li>
<li><em>@within</em> - limits matching within types have the given annotation</li>
<li><em>@annotation</em> - limits the subject has the given annotation</li>
</ul>
</section>
<section>
<h3>Pointcut examples</h3>
<pre><code class="hljs" data-trim contenteditable>
//the execution of any public method:
execution(public * *(..))
//the execution of any method with a name beginning with "set":
execution(* set*(..))
//the execution of any method defined by the AccountService interface:
execution(* com.xyz.service.AccountService.*(..))
//the execution of any method defined in the service package:
execution(* com.xyz.service.*.*(..))
//the execution of any method defined in the service package or a sub-package:
execution(* com.xyz.service..*.*(..))
//any method execution within the service package:
within(com.xyz.service.*)
//any method execution within the service package or a sub-package:
within(com.xyz.service..*)
</code></pre>
</section>
<section>
<h3>Pointcut examples</h3>
<pre><code class="hljs" data-trim contenteditable>
//any method execution where the proxy implements the AccountService interface:
this(com.xyz.service.AccountService)
//any method execution where the target object implements the AccountService interface:
target(com.xyz.service.AccountService)
//any method execution which takes a single parameter, and where the argument passed at runtime is Serializable:
args(java.io.Serializable)
//any method execution where the target object has an @Transactional annotation:
@target(org.springframework.transaction.annotation.Transactional)
//any method execution where the declared type of the target object has an @Transactional annotation:
@within(org.springframework.transaction.annotation.Transactional)
//any method execution where the executing method has an @Transactional annotation:
@annotation(org.springframework.transaction.annotation.Transactional)
//any method execution which takes a single parameter, and where the runtime type of the argument passed has the @Classified annotation:
@args(com.xyz.security.Classified)
//any method execution on a Spring bean named 'tradeService':
bean(tradeService)
//any method execution on Spring beans having names that match the wildcard expression '*Service':
bean(*Service)
</code></pre>
</section>
<section>
<h3>Declaring Before Advice</h3>
<pre><code class="hljs" data-trim contenteditable>
@Before(value = "testCutoff()")
public void before(JoinPoint joinPoint) throws Throwable {
System.out.println("before: " + joinPoint.getSignature() + "A" + count++);
}
</code></pre>
<pre><code class="hljs" data-trim contenteditable>
@Before(value = "execution(* com.oocl.frm.demo.spring.aop.TestAction.*(..))")
public void before(JoinPoint joinPoint) throws Throwable {
System.out.println("before: " + joinPoint.getSignature() + "A" + count++);
}
</code></pre>
</section>
<section>
<h3>Declaring After returning Advice</h3>
<pre><code class="hljs" data-trim contenteditable>
@AfterReturning(value = "testCutoff()")
public void afterReturning(JoinPoint joinPoint) throws Throwable {
System.out.println("after " + joinPoint.getSignature() + " return: A" + count++);
}
</code></pre>
<pre><code class="hljs" data-trim contenteditable>
@AfterReturning(value = "testCutoff()", returning = "val")
public void afterReturning(JoinPoint joinPoint, Object val) throws Throwable {
System.out.println("after " + joinPoint.getSignature() + " return: " + val + "A" + count++);
}
</code></pre>
</section>
<section>
<h3>Declaring After throwing Advice</h3>
<pre><code class="hljs" data-trim contenteditable>
@AfterThrowing(value = "testCutoff()")
public void afterThrowing(JoinPoint joinPoint) throws Throwable {
System.out.println("after throw exception: " + joinPoint.getSignature() + "A" + count++);
}
</code></pre>
<pre><code class="hljs" data-trim contenteditable>
@AfterThrowing(value = "testCutoff()", throwing = "ex")
public void afterThrowing(JoinPoint joinPoint, Exception ex) throws Throwable {
System.out.println("after throw exception: " + joinPoint.getSignature() + "A" + count++);
throw ex;
}
</code></pre>
</section>
<section>
<h3>Declaring After Advice</h3>
<pre><code class="hljs" data-trim contenteditable>
@After(value = "testCutoff()")
public void after(JoinPoint joinPoint) throws Throwable {
System.out.println("after: " + joinPoint.getSignature() + "A" + count++);
}
</code></pre>
</section>
<section>
<h3>Declaring Around Advice</h3>
<pre><code class="hljs" data-trim contenteditable>
@Around(value = "testCutoff()")
public Object invoke(ProceedingJoinPoint joinPoint) throws Throwable {
System.out.println("around before:" + "A" + count++);
Object proceed = joinPoint.proceed();
System.out.println("around after:" + "A" + count++);
return proceed;
}
</code></pre>
</section>
</section>
<section>
<section>
<h2>Schema-based AOP</h2>
</section>
<section>
<h3>Declaring the aspect</h3>
<pre><code class="hljs" data-trim contenteditable>
<aop:config>
<aop:aspect id="aspect" ref="testAspect">
<aop:declare-parents types-matching="com.oocl.frm.demo.spring.aop.*+"
implement-interface="com.oocl.frm.demo.spring.aop.TestIntroduction"
default-impl="com.oocl.frm.demo.spring.aop.TestIntroductionImpl"/>
<aop:pointcut id="testCut" expression="execution(* com.oocl.frm.demo.spring.aop.TestAction.*(..))"/>
<aop:around method="invoke2" pointcut-ref="testCut"/>
<aop:around method="invoke" pointcut="execution(* com.oocl.frm.demo.spring.aop.TestAction.*(..)) and this(introduction)"/>
<aop:after-throwing throwing="ex" method="afterThrowing" pointcut-ref="testCut"/>
<aop:after-returning returning="val" method="afterReturning" pointcut-ref="testCut"/>
<aop:after method="after" pointcut-ref="testCut"/>
<aop:before method="before" pointcut-ref="testCut"/>
</aop:aspect>
</aop:config>
</code></pre>
</section>
<section>
<h3>Advice parameters</h3>
<p>JoinPoint</p>
<pre><code class="hljs" data-trim contenteditable>
@Around(value = "testCutoff() && args(value)")
public Object invoke(ProceedingJoinPoint joinPoint, Object value) throws Throwable {
System.out.println("around before:" + "A" + count++);
System.out.println("args:" + value);
Object proceed = joinPoint.proceed();
System.out.println("around after:" + "A" + count++);
return proceed;
}
</code></pre>
<pre><code class="hljs" data-trim contenteditable>
<aop:around method="invoke" pointcut="execution(* com.oocl.frm.demo.spring.aop.TestAction.*(..)) and this(introduction)" arg-names="introduction"/>
</code></pre>
</section>
<section>
<h3>Advice ordering</h3>
<p>The highest precedence advice runs first on the way in</p>
<p>The highest precedence advice runs last on the way out</p>
<pre><code class="hljs" data-trim contenteditable>
@Aspect
public class TestAnnotatedAspect implements Ordered{
@Override
public int getOrder() {
return 2;
}
}
</code></pre>
<pre><code class="hljs" data-trim contenteditable>
<aop:aspect id="aspect" ref="testAspect" order="6"/> </code></pre>
</section>
</section>
<section>
<section>
<h2>Spring AOP API</h2>
</section>
<section>
<h3>Spring Advice API</h3>
<pre><code class="hljs" data-trim contenteditable>
public class TestAdvice implements MethodBeforeAdvice, MethodInterceptor, ThrowsAdvice, AfterReturningAdvice {
@Override
public Object invoke(MethodInvocation methodInvocation) throws Throwable {
System.out.println("around before: " + this);
Object proceed = methodInvocation.proceed();
System.out.println("around after: " + this);
return proceed;
}
@Override
public void before(Method method, Object[] objects, Object o) throws Throwable {
System.out.println("before: " + this);
}
public void afterThrowing(Throwable throwable) throws Throwable {
System.out.println("after throw exception: " + this);
throw throwable;
}
@Override
public void afterReturning(Object o, Method method, Object[] objects, Object o1) throws Throwable {
System.out.println("after return: " + this);
}
}
</code></pre>
</section>
<section>
<h3>Advisors</h3>
<p></p>
<pre><code class="hljs" data-trim contenteditable>
<bean id="testAdvisor" class="com.oocl.frm.demo.spring.aop.TestAdvice" scope="prototype"></bean>
<aop:config>
<aop:pointcut id="testCut1" expression="execution(* com.oocl.frm.demo.spring.aop.TestAction.*(..))"></aop:pointcut>
<aop:advisor advice-ref="testAdvisor" pointcut-ref="testCut1"></aop:advisor>
</aop:config>
</code></pre>
</section>
</section>
<section>
<h1>THE END</h1>
</section>
</div>
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