SpringAop源碼及調用過程概述
更新時間：2023年10月21日 09:16:44 作者：tobebetter9527
這篇文章主要介紹了SpringAop源碼及調用過程概述,Spring AOP(面向切面編程)是Spring框架的一個重要特性,它提供了一種在程序運行期間動態(tài)地將額外的行為織入到代碼中的方式,需要的朋友可以參考下
1.源碼
public class TestAop {
public static void main(String[] args) throws Exception {
saveGeneratedCGlibProxyFiles(System.getProperty("user.dir") + "/proxy");
ApplicationContext ac = new ClassPathXmlApplicationContext("META-INF/aop.xml");
MyCalculator bean = ac.getBean(MyCalculator.class);
System.out.println(bean.toString());
bean.add(1, 1);
bean.sub(1, 1);
}
public static void saveGeneratedCGlibProxyFiles(String dir) throws Exception {
Field field = System.class.getDeclaredField("props");
field.setAccessible(true);
Properties props = (Properties) field.get(null);
//dir為保存文件路徑
System.setProperty(DebuggingClassWriter.DEBUG_LOCATION_PROPERTY, dir);
props.put("net.sf.cglib.core.DebuggingClassWriter.traceEnabled", "true");
}
}
public class MyCalculator /*implements Calculator */ {
public Integer add(Integer i, Integer j) throws NoSuchMethodException {
Integer result = i + j;
System.out.println("MyCalculator add method invoked");
return result;
}
public Integer sub(Integer i, Integer j) throws NoSuchMethodException {
Integer result = i - j;
return result;
}
public Integer mul(Integer i, Integer j) throws NoSuchMethodException {
Integer result = i * j;
return result;
}
public Integer div(Integer i, Integer j) throws NoSuchMethodException {
Integer result = i / j;
return result;
}
public Integer show(Integer i) {
System.out.println("show .....");
return i;
}
@Override
public String toString() {
return "super.toString()";
}
}
public class LogUtil {
private int start(JoinPoint joinPoint) {
//獲取方法簽名
Signature signature = joinPoint.getSignature();
//獲取參數信息
Object[] args = joinPoint.getArgs();
System.out.println("log---Before advice: " + signature.getName() + "方法開始執(zhí)行：參數是" + Arrays.asList(args));
return 100;
}
public static void stop(JoinPoint joinPoint, Object result) {
Signature signature = joinPoint.getSignature();
System.out.println("log---AfterReturning advice: " + signature.getName() + "方法執(zhí)行結束，結果是：" + result);
}
public static void logException(JoinPoint joinPoint, Exception e) {
Signature signature = joinPoint.getSignature();
System.out.println("log--- AfterThrowing advice: " + signature.getName() + "方法拋出異常：" + e.getMessage());
}
public static void logFinally(JoinPoint joinPoint) {
Signature signature = joinPoint.getSignature();
System.out.println("log---After advice: " + signature.getName() + "方法執(zhí)行結束。。。。。over");
}
public Object around(ProceedingJoinPoint pjp) throws Throwable {
Signature signature = pjp.getSignature();
Object[] args = pjp.getArgs();
Object result = null;
try {
System.out.println("log---Around advice start：" + signature.getName() + "方法開始執(zhí)行，參數為：" + Arrays.asList(args));
//通過反射的方式調用目標的方法，相當于執(zhí)行method.invoke(),可以自己修改結果值
result = pjp.proceed(args);
// result=100;
System.out.println("log---Around advice end: " + signature.getName() + "方法執(zhí)行結束");
} catch (Throwable throwable) {
System.out.println("log---Around advice error：" + signature.getName() + "出現異常");
throw throwable;
} finally {
System.out.println("log---Around advice finally：" + signature.getName() + "方法返回結果是：" + result);
}
return result;
}
}
<?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"
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 class="com.mashibing.MyBeanFactoryPostProcessorBySelf" ></bean>-->
<bean id="logUtil" class="org.geekbang.thinking.in.spring.ioc.overview.aop.xml.util.LogUtil"></bean>
<bean id="myCalculator" class="org.geekbang.thinking.in.spring.ioc.overview.aop.xml.service.MyCalculator"></bean>
<aop:config>
<aop:aspect ref="logUtil">
<aop:pointcut id="myPoint"
expression="execution( Integer org.geekbang.thinking.in.spring.ioc.overview.aop.xml.service.MyCalculator.* (..))"/>
<aop:around method="around" pointcut-ref="myPoint"></aop:around>
<aop:after method="logFinally" pointcut-ref="myPoint"></aop:after>
<aop:before method="start" pointcut-ref="myPoint"></aop:before>
<aop:after-returning method="stop" pointcut-ref="myPoint" returning="result"></aop:after-returning>
<aop:after-throwing method="logException" pointcut-ref="myPoint" throwing="e"></aop:after-throwing>
</aop:aspect>
</aop:config>
<aop:aspectj-autoproxy></aop:aspectj-autoproxy>
</beans>
2. debug過程
生成的源碼：
public class MyCalculator$$EnhancerBySpringCGLIB$$3f411fc extends MyCalculator implements SpringProxy, Advised, Factory {
private boolean CGLIB$BOUND;
public static Object CGLIB$FACTORY_DATA;
private static final ThreadLocal CGLIB$THREAD_CALLBACKS;
private static final Callback[] CGLIB$STATIC_CALLBACKS;
private MethodInterceptor CGLIB$CALLBACK_0;
private MethodInterceptor CGLIB$CALLBACK_1;
private NoOp CGLIB$CALLBACK_2;
private Dispatcher CGLIB$CALLBACK_3;
private Dispatcher CGLIB$CALLBACK_4;
private MethodInterceptor CGLIB$CALLBACK_5;
private MethodInterceptor CGLIB$CALLBACK_6;
private static Object CGLIB$CALLBACK_FILTER;
private static final Method CGLIB$add$0$Method;
private static final MethodProxy CGLIB$add$0$Proxy;
private static final Object[] CGLIB$emptyArgs;
private static final Method CGLIB$toString$1$Method;
private static final MethodProxy CGLIB$toString$1$Proxy;
private static final Method CGLIB$sub$2$Method;
private static final MethodProxy CGLIB$sub$2$Proxy;
private static final Method CGLIB$mul$3$Method;
private static final MethodProxy CGLIB$mul$3$Proxy;
private static final Method CGLIB$show$4$Method;
private static final MethodProxy CGLIB$show$4$Proxy;
private static final Method CGLIB$div$5$Method;
private static final MethodProxy CGLIB$div$5$Proxy;
private static final Method CGLIB$equals$6$Method;
private static final MethodProxy CGLIB$equals$6$Proxy;
private static final Method CGLIB$hashCode$7$Method;
private static final MethodProxy CGLIB$hashCode$7$Proxy;
private static final Method CGLIB$clone$8$Method;
private static final MethodProxy CGLIB$clone$8$Proxy;
static void CGLIB$STATICHOOK1() {
CGLIB$THREAD_CALLBACKS = new ThreadLocal();
CGLIB$emptyArgs = new Object[0];
Class var0 = Class.forName("org.geekbang.thinking.in.spring.ioc.overview.aop.xml.service.MyCalculator$$EnhancerBySpringCGLIB$$3f411fc");
Class var1;
Method[] var10000 = ReflectUtils.findMethods(new String[]{"equals", "(Ljava/lang/Object;)Z", "hashCode", "()I", "clone", "()Ljava/lang/Object;"}, (var1 = Class.forName("java.lang.Object")).getDeclaredMethods());
CGLIB$equals$6$Method = var10000[0];
CGLIB$equals$6$Proxy = MethodProxy.create(var1, var0, "(Ljava/lang/Object;)Z", "equals", "CGLIB$equals$6");
CGLIB$hashCode$7$Method = var10000[1];
CGLIB$hashCode$7$Proxy = MethodProxy.create(var1, var0, "()I", "hashCode", "CGLIB$hashCode$7");
CGLIB$clone$8$Method = var10000[2];
CGLIB$clone$8$Proxy = MethodProxy.create(var1, var0, "()Ljava/lang/Object;", "clone", "CGLIB$clone$8");
var10000 = ReflectUtils.findMethods(new String[]{"add", "(Ljava/lang/Integer;Ljava/lang/Integer;)Ljava/lang/Integer;", "toString", "()Ljava/lang/String;", "sub", "(Ljava/lang/Integer;Ljava/lang/Integer;)Ljava/lang/Integer;", "mul", "(Ljava/lang/Integer;Ljava/lang/Integer;)Ljava/lang/Integer;", "show", "(Ljava/lang/Integer;)Ljava/lang/Integer;", "div", "(Ljava/lang/Integer;Ljava/lang/Integer;)Ljava/lang/Integer;"}, (var1 = Class.forName("org.geekbang.thinking.in.spring.ioc.overview.aop.xml.service.MyCalculator")).getDeclaredMethods());
CGLIB$add$0$Method = var10000[0];
CGLIB$add$0$Proxy = MethodProxy.create(var1, var0, "(Ljava/lang/Integer;Ljava/lang/Integer;)Ljava/lang/Integer;", "add", "CGLIB$add$0");
CGLIB$toString$1$Method = var10000[1];
CGLIB$toString$1$Proxy = MethodProxy.create(var1, var0, "()Ljava/lang/String;", "toString", "CGLIB$toString$1");
CGLIB$sub$2$Method = var10000[2];
CGLIB$sub$2$Proxy = MethodProxy.create(var1, var0, "(Ljava/lang/Integer;Ljava/lang/Integer;)Ljava/lang/Integer;", "sub", "CGLIB$sub$2");
CGLIB$mul$3$Method = var10000[3];
CGLIB$mul$3$Proxy = MethodProxy.create(var1, var0, "(Ljava/lang/Integer;Ljava/lang/Integer;)Ljava/lang/Integer;", "mul", "CGLIB$mul$3");
CGLIB$show$4$Method = var10000[4];
CGLIB$show$4$Proxy = MethodProxy.create(var1, var0, "(Ljava/lang/Integer;)Ljava/lang/Integer;", "show", "CGLIB$show$4");
CGLIB$div$5$Method = var10000[5];
CGLIB$div$5$Proxy = MethodProxy.create(var1, var0, "(Ljava/lang/Integer;Ljava/lang/Integer;)Ljava/lang/Integer;", "div", "CGLIB$div$5");
}
final Integer CGLIB$add$0(Integer var1, Integer var2) throws NoSuchMethodException {
return super.add(var1, var2);
}
public final Integer add(Integer var1, Integer var2) throws NoSuchMethodException {
MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_0;
}
// 從這里進入MethodInterceptor的接口
return var10000 != null ? (Integer)var10000.intercept(this, CGLIB$add$0$Method, new Object[]{var1, var2}, CGLIB$add$0$Proxy) : super.add(var1, var2);
}
}
CGLIB$CALLBACK_0的advised對象的targetSource有一個普通對象MyCalculate.
獲得執(zhí)行鏈
進入調用鏈
進入實際的方法
到此這篇關于SpringAop源碼及調用過程概述的文章就介紹到這了,更多相關SpringAop調用過程內容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關文章希望大家以后多多支持腳本之家！
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