|
| |
| | The Aspects Blog: I don't want to know that... (writing robust pointcut expressions) |
 | | This pointcut is less tightly coupled to the details of the Account class, and will continue to match even if the arguments or return types are changed for the two methods. | | | The caveat is, if you do this, the pointcut should be genuinely part of the class' interface, and not particular to some other concern implemented in an aspect. | | | The topic of this post is writing robust pointcut expressions, by which I mean pointcuts that stand the maximum chance of continuing to match the intended join points, and only the intended join points, as a program evolves. |
|
http://www.aspectprogrammer.org/blogs/adrian/2004/08/i_dont_want_to.html
(971 words)
|
|
| |
| | JOT: Journal of Object Technology - On Getting Use Cases and Aspects to Work Together, Renaud Pawlak, Houman Younessi |
| | The semantics based pointcuts of the JAC framework [Pawlak01] allow the programmer to write pointcuts that will cut the methods based on what they are doing in the program (for instance, the programmer can include/exclude a whole method set depending on whether it modifies a given object state or not). | | | Pointcuts will certainly be defined on the two points of view (the use case and the component ones) in an intuitive way. | | | Consequently, the pointcut is able to crosscut a set of base components thus making it possible to introduce a crosscutting concern in a simple way. |
|
http://www.jot.fm/issues/issue_2004_01/column2
(3912 words)
|
|
| |
| | AOP@Work: AOP and metadata: A perfect match, Part 1 |
| | The sophistication of the pointcut language is a differentiating factor among the various AOP systems. | | | Pointcut syntax differs in the various metadata-fortified AOP systems. | | | class with a participant subaspect that is responsible for defining the pointcut for the embedded class. |
|
http://www-128.ibm.com/developerworks/java/library/j-aopwork3
(6136 words)
|
|
| |
| | Using Eclipse AspectJ: Your First Steps |
| | The answer is that the advice parameter values have to be provided by the pointcut: When the pointcut matches a join point, it needs to extract some information from that join point (in our case, the policy object that has just been updated), and pass it into the advice. | | | Figure 2.31 shows the result: a "formal unbound in pointcut" error. | | | We have a way of matching all the join points where the state of a policy is updated. |
|
http://www.awprofessional.com/articles/article.asp?p=357692&seqNum=6
(983 words)
|
|
| |
| | Rickard doesn't understand why people want to use attributes for AOP |
| | The problem with this is that it is no different than making named pointcuts in AspectJ and has nothing to do with attributes and solves none of the problems that attributes solve. | | | We basically have a few choices in this case, either choose specific methods in our pointcut, add a rules engine to the AOP framework that can query code more intelligently, or we can use attributes to single out pointcuts in a predictable manner. | | | One of the things I have been lobbying for with AOP and Java is to step back from the problem a bit and make sure that we are doing things properly. |
|
http://homepage.mac.com/spullara/rants/C1464297901/E1177508375
(565 words)
|
|
| |
| | AspectJ Reference - Porting Notes |
| | pointcuts, the new value of a field is still available, but not the way it was previously. | | | One of the most pervasive changes in porting code written before 1.0alpha1 is the change in some of the pointcut names from plural to singular, that is, they lose an "s". | | | forms specify staticly-determinable pointcuts, they might be used in declare error or declare warning statements, which might produce different results. |
|
http://sardes.inrialpes.fr/~bouchena/teaching/AOP/Soft/AopDoc/porting.html
(5115 words)
|
|
| |
| | Chapter 5. Spring AOP: Aspect Oriented Programming with Spring |
| | Pointcuts can be composed using the static methods in the org.springframework.aop.support.Pointcuts class, or using the ComposablePointcut class in the same package. | | | Note that pointcuts are not currently interoperable between frameworks, and the AOP Alliance does not currently define pointcut interfaces. | | | If no pointcut in any of the advisors matches any method in a business object, the object will not be proxied. |
|
http://static.springframework.org/spring/docs/1.1.5/reference/aop.html
(8552 words)
|
|
| |
| | AOP@Work: Introducing AspectJ 5 |
| | In a similar vein, when AspectJ determines that a pointcut may match a given join point but cannot apply the run-time test to be certain, then the pointcut is considered to match and the AspectJ compiler issues an "unchecked" warning to indicate that the actual matching cannot be checked. | | | AspectJ has to decide whether or not such a pointcut should match, even though it is lacking the information needed to make a definitive ruling. | | | pointcut designators all match based on run-time type information. |
|
http://www-128.ibm.com/developerworks/java/library/j-aopwork8
(5366 words)
|
|
| |
| | The AspectJ Primer - The AspectJ Language |
| | On the left-hand side, the pointcut is given the name "setters" and no parameters. | | | Having seen several examples of pointcuts, you are now ready to understand the example below. | | | Advice defines pieces of aspect implementation that execute at well-defined points in the execution of the program. |
|
http://www.cs.indiana.edu/csg/links/aspectj0.7/doc/primer/language/aspectjlang.html
(1869 words)
|
|
| |
| | techno.blog("Dion"): AspectJ, "dynamic" pointcuts, and Spring. A great combination |
| | You can do this in JBoss AOP as well since our pointcuts are creatable with a string expression, have apis to match an expression for any Javassist or java.lang.reflect construct and our Invocation(joinpoint) objects all have the relevent java.lang.reflect objects to drive the expression matching. | | | Jboss AOP also has the concept of a programmable pointcut in which you can write code to match joinpoints in any way you want. | | | // at which a dynamic pointcut could match (for efficiency) |
|
http://www.almaer.com/blog/archives/000183.html
(803 words)
|
|
| |
| | Uses of Interface org.springframework.aop.Pointcut (Spring Framework) |
| | Pointcut bean for simple method name matches, as alternative to regexp patterns. | | | Convenient superclass when we want to force subclasses to implement the MethodMatcher interface, but subclasses will want to be pointcuts. | | | Convenient superclass when we want to force subclasses to implement MethodMatcher interface, but subclasses will want to be pointcuts. |
|
http://www.springframework.org/docs/api/org/springframework/aop/class-use/Pointcut.html
(263 words)
|
|
| |
| | Enterprise Java Community: AspectWerkz 2.0: Plain Java AOP, Java 5 Annotations, and EJB 3 Transactions |
| | The pointcut for such a more correct implementation would thus require to match on class annotation as well by using the within(...) syntax that will match on types: | | | It is interesting to note that this field access pointcut is not a feature available in any of the proxy based framework like Spring AOP, DynAOP etc but is available in AOP frameworks like AspectWerkz, AspectJ and JBoss AOP which are using bytecode instrumentation. | | | The following pointcut will match any method in any class that is annotated with the |
|
http://www.theserverside.com/articles/article.tss?l=AspectWerkzP2
(3208 words)
|
|
| |
| | Pointcut - Wikipedia, the free encyclopedia |
| | In aspect-oriented computer programming, a pointcut is a set of join points. | | | This allows a programmer to describe where and when additional code should be executed in addition to an already defined behaviour. | | | Whenever the program execution reaches one of the join points described in the pointcut, a piece of code associated with the pointcut (called advice) is executed. |
|
http://en.wikipedia.org/?title=Pointcut
(126 words)
|
|
| |
| | Maven xdoc Plugin - JAML-Schema |
| | If this attribute is set to "false" or "no", the aspect will be ignored during the weaving process (all nested advices and introductions are ignored as well). | | | If this attribute is set to "false" or "no", this interceptor will be ignored during the weaving process. | | | If this attribute is set to "false" or "no", the advice will be ignored during the weaving process. |
|
http://www.ics.uci.edu/~trungcn/jaml/design-jaml-schema.html
(1600 words)
|
|
| |
| | [No title] |
| | We will appreciate if you provide us with the example scenario that would work only if this feature was there. | | | Explanation: Recent changes in the AST hierarchy broke the pattern matching algorithm Fixed: Yes 4 Eos documentation says that "Each [...] aspect containing instancelevel advices provides implicit methods addObject and removeObject for specifying which instances are to be woven and unwoven". | | | A missing '' from the expression "m.Attributes = MemberAttributes.Public;" in the function CreateAdvice Fixed: Yes 5 Actually there are two bugs exposed by this code: (1) MyAspect pointcuts intercepts ALL methods, when it should intercept only methods that match the specified parameters. |
|
http://www.cs.virginia.edu/pipermail-2.1.5/eos-discuss/2004-June.txt
(2114 words)
|
|
| |
| | Enterprise Java Community: Aspect-oriented refactoring series - Part 1 Overview and Process |
| | Theoretically, systems with such characteristics may be created during the initial implementation, while practically, they often result from refactoring efforts. | | | However, if methods that need the same functionality are added later, doing so will require modifying the pointcut definition. | | | Note that if the crosscutting requires code to execute at multiple positions with respect to the join points, we will need more than one advice, for example, a |
|
http://www.theserverside.com/articles/article.tss?l=AspectOrientedRefactoringPart1
(2568 words)
|
|
| |
| | Spring: A Quick Journey Through Spring AOP |
| | The method matcher simply describes which methods for a given class are considered valid joinpoints for this pointcut. | | | This is a useful implementation detail because a static method matcher, while having less flexibility (you can't check the method invocation arguments), is, by design, much faster, as the check is only performed once, rather than at every method invocation. | | | Most of these classes take the seperation of pointcut and advisor out of the equation, which, while theoretically reducing some degree of flexibility, typically makes configuration much easier. |
|
http://www.javalobby.org/java/forums/t44746.html
(2895 words)
|
|
| |
| | AspectJ 0.7beta6 Design Notes -- Semantics |
| | The type of the exposed return value can be widened in the same way that pointcut declarations allow such widening. | | | The value for this context is exposed by listing that identifier (and giving it a type) in the formal parameters of the pointcut or advice. | | | Aspect extension is just like class extension in terms of fields and methods. |
|
http://www.cs.indiana.edu/csg/links/aspectj0.7/doc/design/semantics.html
(3553 words)
|
|
| |
| | Chapter 4. XML Bindings |
| | To prepare something, just define a pointcut expression that matches the joinpoint you want to instrument. | | | The above declaration says that if any classes in the datalayer call classes in the business layer of your application, an error should be thrown. | | | These two pointcuts can then be referenced within a |
|
http://docs.jboss.org/aop/1.1/aspect-framework/reference/en/html/xml.html
(1840 words)
|
|
| |
| | Pointcuts and Advice |
| | In code style, it is possible to use the | | | pointcut someCallWithIfTest(int i) : call(* *.*(int)) andand args(i) andand if(i > 0); | | | An example with modifiers (Remember that Java 5 annotations are not inherited, so the |
|
http://www.eclipse.org/aspectj/doc/next/adk15notebook/ataspectj-pcadvice.html
(1161 words)
|
|
| |
| | Open PhD position: "Expressive pointcut languages for AOP" |
| | However, fundamental problems with respect to the design, semantics and implementation of such expressive pointcut languages are currently unsolved. | | | European network of excellence in AOSD, the PhD should work on the design and implementation of expressive pointcut languages by further developing an existing framework for such languages, | | | Design of an aspect language with explicit support for relationships between sequences of execution points on the level of its pointcut language. |
|
http://www.emn.fr/x-info/sudholt/phd.html
(636 words)
|
|
| |
| | [No title] |
| | The semantics of execution pointcuts is based on the dynamic type of the target. ¡& Ì Ì ªZ 9 I - ó ; ¨ Summary ª ¨7 Unintuitive: The semantics of call pointcuts depends on the static type of the target. | | | Call and execution pointcuts only capture join points for classes where the given method is lexically defined. | | | Walker, S. Zdancewic, and J. Ligatti A Semantical Approach to Method-Call Interception R. |
|
http://www.cs.tau.ac.il/~amiramy/SoftwareSeminar/foal.v3.ppt
(572 words)
|
|
| |
| | [No title] |
| | The methods have to be "setter" methods and return void */ pointcut example4(): execution(public void com.wgrosso..*.set*(..)); Listing Two /* The call pointcut isn't applicable, because stringWrapper is declared to be of type Object (which does not match the signature). | | | Because StringWrapper is in the package com.wgrosso, the execution pointcut does apply. | | | */ pointcut example3(): execution(public * com.wgrosso..*.*(..)); /* Pulls out executions of public methods of classes in any package below com.wgrosso (including classes in com.wgrosso). |
|
http://www.ddj.com/ftp/2002/2002_08/aop.txt
(173 words)
|
|
| |
| | Attribute Oriented Programming != Aspect Oriented Programming |
| | In other words, when you come across a join point defined within a Pointcut, I want you to execute this piece of code “before” you step into the piece of code defined by the Join Point (e.g. | | | The advice body is the executable code inserted at the byte level mentioned above. | | | The above implementation defines an aspect as a pier to a class. |
|
http://weblogs.asp.net/Mnolton/archive/2004/04/23/119181.aspx
(1652 words)
|
|
| |
| | Software Systems Dept.: PCDiff: Attacking the Fragile Pointcut Problem |
| | Unfortunately todays mainstream aspect oriented languages suffer from pointcut languages where pointcut declarations result in a high coupling between aspect and base system. | | | Aspect oriented programming has been proposed as a way to improve modularity of software systems by allowing encapsulation of cross-cutting concerns. | | | These properties are a major obstacle for program evolution of aspect oriented software. |
|
http://www.infosun.fmi.uni-passau.de/st/papers/EIWAS04
(218 words)
|
|
| |
| | [No title] |
| | Args pointcut are not supported in version 0.2. | | | Thanks for your continued interest, Rajan Bug Fixes: Bug#1: Pointcut expression not matching classes. | | | [NOTE-06] Eos is not matching pointcut parameters correctly... |
|
http://www.cs.virginia.edu/pipermail-2.1.5/eos-discuss/2004-May.txt
(2349 words)
|
|
| |
| | Simplify your logging with AspectJ |
| | The introduction is a static crosscutting instruction that introduces changes to the classes, interfaces, and aspects of the system. | | | If you wanted to keep some logging-specific state in the logged classes, such as the number of method executions in each class, you could use a static introduction within the aspect to add an integer data member to all classes being logged. | | | For example, a pointcut can select a join point that is a call to a method, and it could also capture the method’s context, such as the target object on which the method was called and the method’s arguments. |
|
http://www.developer.com/java/other/print.php/10936_3109831_1
(1249 words)
|
|
| |
| | : Class Pointcut |
| | An advice for the given jp_name is added to the current pointcut object. | | | Returns null if the advice or join point does not exist. | | | Pointcut has a name and a table for joinpoints associated with it. |
|
http://www.iit.edu/~akkawif/project/links/doc/Pointcut.html
(193 words)
|
|
| |
| | It's the Aspects @ JAVA DEVELOPER'S JOURNAL |
| | A pointcut is a way for you to define where you want your aspects applied. | | | What this example shows is that with AOP, you're able to pull together crosscutting behavior into one object and sprinkle it easily and simply throughout your code base without making code unreadable or polluted with functionality that doesn't belong with the business logic you are implementing. | | | As framework developers focus on providing their functionality through aspects, the term pointcut will be morphed into pointclick as aspects are applied to an object model through the point-and-click interfaces of an IDE. |
|
http://java.sys-con.com/read/38104.htm?CFID=821105&CFTOKEN=50525F3F-B0E0-5C82-B917ADD125F35B00
(2455 words)
|
|
| |
| | CS683: Doc 5, AspectJ Syntax 3 |
| | An instance of the aspect is created for every object that is the executing object of any join points of the Pointcut | | | An instance of the aspect is created for every object that is the target object of any join points of the Pointcut | | | An instance of the aspect is created for flow of control of the join points of the Pointcut |
|
http://www.eli.sdsu.edu/courses/spring03/cs683/notes/aspectjSyntax3/aspectjSyntax3.html
(604 words)
|
|
| |
| | [No title] |
| | These methods are implemented using Java's reflection capabilities that allow run time querying of the structure of classes. | | | aspect traceCalls { private static int A.halfCalls = 0; private static int A.plusoneCalls = 0; pointcut method0(int n) : args(n) andand call( | | | The after advice for the pointcut for the first function called is to print the final values of each of the counters. |
|
http://condor.depaul.edu/~glancast/447class/docs/lecMay26.html
(776 words)
|
|
| |
| | The Aspects Blog @ aspectprogrammer.org |
| | The advice body is implemented by the method "oneIntArg", and the associated pointcut expression matches the execution of any method named "setAge" taking a single int argument. | | | You can read up on "args" (and all of the other AspectJ pointcut designators" in the AspectJ programming guide at the AspectJ website. | | | Using the "this" pointcut designator will bind the proxy object (the value of "this" for the object instance that represents the bean), and using the "target" pointcut designator will bind the true target. |
|
http://www.aspectprogrammer.org/blogs/adrian
(3085 words)
|
|
| |
| | JBoss.com - Forums - Unable to figure out calledmethod of a caller pointcut |
| | The pointcuts are being defined using the API and not the XML. | | | You can use the -report switch with the precompiler (the ant task would be report="true") and it will dump out all matching joinpoints and the bindings that they are attached to. | | | The following is the code that is causing the exception. |
|
http://www.jboss.org/?module=bb&op=viewtopic&p=3848858
(358 words)
|
|
| |
| | AspectWerkz - Plain Java AOP - XML definition |
| | During the transformation process (online or offline), a class might be transformed (depending on the pointcuts) if | | | name="pcArg1(String s)" expression="execution(* foo.Bar.method(..)) AND args(s,..)"/> name="pcArg1Same(String s)" expression="pc1 AND args(s,..)"/> name="pcArg1Other(com.Foo foo, String[] s)" expression="execution(* foo.Bar.method(..)) AND args(foo, int,.., s)"/> name="pcMultiLine"> execution(int com.Do.foo(..)) OR execution(int come.Done.bar(..)) | | | The signature must name its parameters (as if it was some source code). |
|
http://aspectwerkz.codehaus.org/xml_definition.html
(1414 words)
|
|
| |
| | Maven xdoc Plugin - JAML |
| | In Aspect-Oriented Programming, a pointcut is a set of join points which are "well-defined" points in the execution of a component or program. | | | Pointcuts can be combined to compose intersections, unions, and/or compliments of the set of other pointcuts (using AND/OR/NOT boolean operators). | | | A primitive pointcut is a pointcut that is specified by a single primitive joinpoint listed in the following table. |
|
http://www.isr.uci.edu/~trungcn/jaml/design.html
(647 words)
|
|
| |
| | Pointcut (JAC 0.12-beta2) |
| | - the component the current pointcut is applied to | | | This abstract class is the definition of a pointcut in org.objectweb.jac. | | | A generic method that parses a pointcut expression and stores the result within a vector. |
|
http://jac.objectweb.org/docs/javadoc/org/objectweb/jac/core/Pointcut.html
(204 words)
|
|
| |
| | FTPOnline - Make Your Applications Operations Friendly With AOP |
| | The declaration in the XML file names a Java class, which implements the JBossAOP | | | This definition specifies a named joinpoint in the program that can be referenced by an advice. | | | The logic, which executes when the pointcut is triggered, is placed into the |
|
http://www.fawcette.com/special/opsmgmt/swarr/page3.asp
(681 words)
|
|
| |
| | JBoss.com - Forums - New AOP stuff going on. |
| | public aspect DisplayUpdating { pointcut move(): call(void FigureElement.moveBy(int, int)) | | | FYI, for above couldn't it be solved by a caller pointcut in JBoss AOP? | | | In fact the Sable paper I mentioned in my e-mail (http://www.sable.mcgill.ca/publications/techreports/sable-tr-2003-8.pdf) used cflow in their implementation of Quicksort, which as you just pointed out was not necessary and can be done with a static check, as opposed to the horridly dynamic cflow check. |
|
http://www.jboss.org/?module=bb&op=viewtopic&p=3820672
(1224 words)
|
|
| |
| | [No title] |
| | This refers to your project which highlights all the classes that are involved in the traversal. | | | Question 3: ============================================================= 15 points for each list: 30 points Consider the class dictionary Histories from question 1: For the traversal strategies "from Histories to NewStrategy" "from Entry to Pointcut" list in alphabetical order the classes that will be highlighted in the UML class diagram for Histories. |
|
http://www.ccs.neu.edu/research/demeter/course/exams/f-csu670-f03/f-csu670-f03.txt
(422 words)
|
|
| |
| | Pointcut (Spring Framework) |
| | Both these basic terms and a Pointcut itself can be combined to build up combinations. | | | A pointcut is composed of a ClassFilter and a MethodMatcher. |
|
http://www.springframework.org/docs/api/org/springframework/aop/Pointcut.html
(39 words)
|
|
| |
| | Monika Krug's Blog: A "protected-private" keyword? |
| | to bind the formal parameters of the pointcut. | | | If our pointcould selected a method, the around advice would need the same return type and declared exceptions as the method, while before and after advice do not have return types. | | | And these parameters we need to expose so that we can use them in the advice later on. |
|
http://weblogs.java.net/blog/monika_krug/archive/2005/01/a_protectedpriv_1.html
(634 words)
|
|
| |
| | [No title] |
| | $ m ó ¨ Abstract Aspects ª ¨¡ A generic aspect requiring authentication through a singleton Authenticator: // AbstratcAuthenticationAspect.java public abstract aspect AbstractAuthenticationAspect { public abstract pointcut opsNeeddingAuthentication(); before() : opsNeeddingAuthentication() { // Perform authentication. |
|
http://www.cs.huji.ac.il/course/2002/ood/material_ppt/OOD_Aspects.ppt
(210 words)
|
|
|
