Oops, The format is not good for read, And looks like I can't modify it. Sorry.
On Nov 24, 10:10 am, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote: > Hi, Guys, > > Aspect-Oriented Programming for GWT, GWTENT-0.5 now available for > download. > Please see here or read through this post for more > information:http://code.google.com/p/gwt-ent/wiki/AOP > You can get all interceptors in sample project > athttp://gwt-ent.googlecode.com/svn/trunk/gwtent-sample/src/com/gwtent/... > Please download the sample project > athttp://code.google.com/p/gwt-ent/downloads/list > > If you get anything, any advises, issues, please let me know, let us > make it better. :D > > 1, Introduction > > Now Aspect-Oriented Programming is available in GWT. > > The following advice type supported by GWTENT(Compatible with > AspectJ annotation). > > 1. @Around > 2. @Before > 3. @After > 4. @AfterReturning? > 5. @AfterThrowing? > > * Around advice: 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. > * Before advice: Advice that executes before a join point, but > which does not have the ability to prevent execution flow proceeding > to the join point (unless it throws an exception). > * After (finally) advice: Advice to be executed regardless of the > means by which a join point exits (normal or exceptional return). > * After returning advice: Advice to be executed after a join point > completes normally: for example, if a method returns without throwing > an exception. > * After throwing advice: Advice to be executed if a method exits > by throwing an exception. > > And for pointcut, we support both Google Guice matcher classes and > AspectJ expression(a subset of AspectJ expression) > > Please see here for all interceptors in sample project. Please > download the sample projecthere > > 2, Pointcut > 2.1, Overview > > Pointcut: A predicate that matches join points. Advice is associated > with a pointcut expression and runs at any join point matched by the > pointcut (for example, the execution of a method with a certain name). > The concept of join points as matched by pointcut expressions is > central to AOP: we support AspectJ pointcut language and Google Guice > matcher classes. > 2.1.1, Client-side code? > > Please note, All pointcut match code is runing at compile time, > it's mean you can write truely java code in your matcher class and > without any limit in GWT client-side code. In compile time and host- > mode, GWTENT require AspectJ jars to dealwith AspectJ expression, but > after your compile it, all are javascript. > > 2.2, AspectJ pointcut expression style > > to be continue > > 2.2, Google Guice matcher style > > We support "matchclass(the class name which implement > com.gwtent.aop.matcher.ClassMethodMatcher?)", for example: > > @Aspect > public static class PhoneRedirectInterceptor { > > @Around("matchclass > (com.gwtent.test.aspectj.TestMatcher)") > public Object invoke(MethodInvocation invocation) > throws Throwable { > invocation.proceed(); > System.out.println("Do something in > PhoneRedirectInterceptor..."); > return new Receiver("Alberto's Pizza > Place"); > } > } > > the matcher class will looks like this: > > public class TestMatcher implements ClassMethodMatcher { > > public Matcher<? super Class<?>> getClassMatcher() { > return Matchers.subclassesOf(Phone.class); > } > > public Matcher<? super Method> getMethodMatcher() { > return Matchers.returns(Matchers.only > (Phone.Receiver.class)); > //return Matchers.any(); > } > > } > > 3, Advice > 3.1, Arguments Binding > > 1. if there is "com.gwtent.client.aop.intercept.MethodInvocation?" > in args list, then invocation will assign to args. > 2. if source method and advice method have the same class type and > this type just have one, then we assign this one to args > 3. Read settings in @AfterReturning? > > [EMAIL PROTECTED]( > pointcut="**", > returning="retVal" > ) > public void afterReturning(Object retVal) > > 4. Read settings in @AfterThrowing? > > [EMAIL PROTECTED]( > throwing="e" > } > public void afterThrowing(Throwable e) > > 3.2, @Around > > 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. > > 3.2.1, Example > > @Around("execution(* > com.gwtent.sample.client.Phone.call(java.lang.Number))") > public Object invoke(MethodInvocation invocation) > throws Throwable { > invocation.proceed(); > System.out.println("Do something in > PhoneRedirectInterceptor..."); > return new Receiver("Alberto's Pizza Place"); > } > > 3.3, @Before > > Advice that executes before a join point, but which does not have > the ability to prevent execution flow proceeding to the join point > (unless it throws an exception). > > 3.3.1, Example > > @Before("execution(* > com.gwtent.sample.client.Phone.call(java.lang.Number))") > public void beforeCall(MethodInvocation invocation) { > for (Object arg : invocation.getArguments()){ > System.out.println("Do something in > PhoneLoggerInterceptor, Before..."); > > if (arg instanceof Number) > System.out.println("Call to: " > + arg); > } > } > > 3.4, @After > > After (finally) Advice to be executed regardless of the means by > which a join point exits (normal or exceptional return). > > 3.4.1, Example > > @After("execution(* com.gwtent.sample.client.Phone.call > (java.lang.Number))") > public void afterCall(MethodInvocation invocation) > { > for (Object arg : invocation.getArguments()){ > System.out.println("Do something in > PhoneLoggerInterceptor, After..."); > > if (arg instanceof Number) > System.out.println("After > Call: " + arg); > } > } > > 3.5, @AfterReturning? > > Advice to be executed after a join point completes normally: for > example, if a method returns without throwing an exception. > > 3.5.1, Example > > @AfterReturning(pointcut = "execution(* > com.gwtent.sample.client.Phone.call(java.lang.Number))", > returning = "returnValue") > public void afterReturningCall(MethodInvocation > invocation, Object returnValue) { > System.out.println("Do something in > PhoneLoggerInterceptor, AfterReturning..."); > > if ((returnValue != null)){ > if (returnValue instanceof Number) > System.out.println("Returning > Number: " + returnValue.toString()); > else > System.out.println("Returning > Object: " + returnValue.toString()); > }else{ > System.out.println("Returning Object > is NULL?"); > } > } > > 3.6, @AfterThrowing? > > Advice to be executed if a method exits by throwing an exception. > > 3.6.1, Example > > @AfterThrowing(pointcut="execution(* > com.gwtent.sample.client.Phone.call(java.lang.Number))", > throwing="e") > public void phoneCallErrorLog(MethodInvocation > invocation, Throwable e){ > System.out.println("PhoneCallErrorLog: " + > e.getMessage()); > } > > 4, The whole example > Class > > The normal gwt class, for now you need implement "Aspectable" mark > interface > > public class Phone implements Aspectable { > private static final Map<Number, Receiver> RECEIVERS = new > HashMap<Number, Receiver>(); > > static { > RECEIVERS.put(123456789, new Receiver("Aunt Jane")); > RECEIVERS.put(111111111, new Receiver("Santa")); > } > > /** > * the phone number, like your home number > */ > private Number number; > > public Receiver call(Number number) { > System.out.println("The call here..."); > Receiver result = RECEIVERS.get(number); > if (result != null) > return result; > else > throw new NumberNotFoundException("Can't > found receiver, number: " + number); > } > > public Receiver call(String number){ > System.out.println("The call here..."); > return RECEIVERS.get(111111111); > } > > public String toString(){ > return super.toString(); > } > > public void setNumber(Number number) { > this.number = number; > } > > public Number getNumber() { > return number; > } > > public static class NumberNotFoundException extends > RuntimeException{ > > /** > * > */ > private static final long serialVersionUID = 1L; > > public NumberNotFoundException(String msg){ > super(msg); > } > > } > > public static class Receiver { > private final String name; > > public Receiver(String name) { > this.name = name; > } > > @Override > public String toString() { > return getClass().getName() + "[name=" + name > + "]"; > } > } > > Aspect Classes > > @Aspect > public static class PhoneLoggerInterceptor { > > //execution(modifiers-pattern? ret-type-pattern > declaring-type-pattern? name-pattern(param-pattern) throws-pattern?) > @Before("execution(* > com.gwtent.client.test.aop.Phone.call(java.lang.Number))") > public void beforeCall(MethodInvocation invocation) { > for (Object arg : invocation.getArguments()){ > System.out.println("Do something in > PhoneLoggerInterceptor, Before..."); > > if (arg instanceof Number) > System.out.println("Call to: " > + arg); > } > } > > @AfterReturning(pointcut = "execution(* > com.gwtent.client.test.aop.Phone.call(java.lang.Number))", > returning = "returnValue") > public void afterReturningCall(MethodInvocation > invocation, Object returnValue) { > System.out.println("Do something in > PhoneLoggerInterceptor, AfterReturning..."); > > if ((returnValue != null)){ > if (returnValue instanceof Number) > System.out.println("Returning > Number: " + returnValue.toString()); > else > System.out.println("Returning > Object: " + returnValue.toString()); > }else{ > System.out.println("Returning Object > is NULL?"); > } > } > > @After("execution(* com.gwtent.sample.client.Phone.call > (java.lang.Number))") > public void afterCall(MethodInvocation invocation) > { > for (Object arg : invocation.getArguments()){ > System.out.println("Do something in > PhoneLoggerInterceptor, After..."); > > if (arg instanceof Number) > System.out.println("After > Call: " + arg); > } > } > } > > @Aspect > public static class PhoneRedirectInterceptor { > > @Around("execution(* > com.gwtent.client.test.aop.Phone.call(java.lang.Number))") > public Object invoke(MethodInvocation invocation) > throws Throwable { > invocation.proceed(); > System.out.println("Do something in > PhoneRedirectInterceptor..."); > return new Receiver("Alberto's Pizza Place"); > } > } > > Using it > > public void testAOP(){ > Phone phone = (Phone) GWT.create(Phone.class); > Receiver auntJane = phone.call(123456789); > System.out.println(auntJane); > } > > The Result - System Output > > Do something in PhoneLoggerInterceptor, Before... > Call to: 123456789 > Validate, you cann't dail to 0, current Number(most time it's null): > null > The call here... > Do something in PhoneRedirectInterceptor... > Do something in PhoneLoggerInterceptor, After... > After Call: 123456789 > Do something in PhoneLoggerInterceptor, AfterReturning... > Returning Object: com.gwtent.sample.client.Phone$Receiver > [name=Alberto's Pizza Place] > com.gwtent.sample.client.Phone$Receiver[name=Alberto's Pizza Place] --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. 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