join points

The implicit information available in the signature of program elements is often enough to capture the required join points.

While enumeration can be useful, it is often more convenient to express join points by means of structural properties.

Summary: Use the AJDT's cross-references view as you develop your aspect to see which join points it is likely to advise.

One of the best practices of getting most out of AOP is to use to metadata to capture join points for cross-cutting concerns.

Type isn't the only consideration when selecting join points: properties may also be considered.

You can consider the pointcut to be a query of your code that returns a set of join points.

For an AOP approach to be advantageous, multiple join points for a single concern must exist.

The beauty here is being able to capture join points without additional collaboration beyond that required by the RMI infrastructure.

The sequence diagram in Figure 1 highlights a few of the dynamic join points that result from operations on an Account.

A pointcut, then, is a language construct that picks out a set of join points based on defined criteria.

The JBoss AOP model is nearly as expressive and only omits some of the less commonly used join points for the benefit of simplicity.

At the core of each approach, however, is the mechanism for accessing, composing, naming, and abstracting join points.

The key is to write a test that will fail if the aspect misbehaves or does not apply to the join points you intend it to.

If you want the aspect to affect many join points, pick a few representative examples.

Verify manually that the list is complete and does not include join points that should be omitted.

Together, these two pointcuts define all of the join points with which we are concerned.

Situations like this one invite the use of metadata to capture the required join points.

The aspect encapsulates the join points, pointcuts, inter-type declarations, and advice for a crosscutting concern.

Pointcuts allow you to unambiguously reference multiple join points in the program code (method content and processes).

The pointcut is an expression that describes a set of join points.

When editing pointcuts, being forced to run the system and inspect the results to find affected join points is very time-consuming.

Compare the maps in the crosscutting comparison tool to detect any unwanted changes to the join points affected by your aspects.

Try to really leverage join points where objects might not be necessary.

Pointcuts can describe sets of join points by means of explicit enumeration.

Join points, pointcuts, and advice address the dynamic properties of your software.

AOP implementations normally declare join points using template languages.

A "pointcut" is a construct used to programmatically declare and group join points.

After all, if you can identify the join points needing annotations, you can write a pointcut and advise those join points directly.

This technique is based on aspects signaling compile-time warnings if specific join points are found to be reachable.

Typical join points in AspectJ include method calls, access to class members, and the execution of exception handler blocks.

Join points are encapsulated in quantifiable expressions (queries) called "pointcuts. "

At run time, Contract4J uses built-in aspects to advise the join points where the tests should be executed.

Dynamic join points are where aspect execution meets the execution of the program.

Metadata brings additional information to selecting join points where Pointcuts use annotations to capture join points.

In this case, you will write join points to capture calls to all methods of the specific interface.

On the downside, the crosscutting comparison view can degrade if an aspect affects many join points.

Pointcuts are then used to define the join points at which advice in the aspect applies.

Join points that correspond to places in the code contained within certain classes or methods.

The subaspect below defines a pointcut that captures the join points needing transaction management support.

An AOP system that supports consuming annotations will let you select join points based on annotations associated with program elements.

In such cases, the annotator-supplier design avoids the risk of missed annotations for join points.

Conversely, when you write an aspect, you immediately see what join points it affects.

Is in essence a construct to capture join points.

Static join points allow aspects to define new members on a class.

Join points within certain program control flows.

Pointcut selects a subset of join points that need lock management.

Select join points and collect the context at selected join points.

Each AOP tool offers a number of primitive pointcuts for matching join points.

Method execution join points correspond to the life cycle of a method until it returns.

AOP lets you define pointcuts that match the many join points where you want to monitor performance.

With AOP, we need a way to identify join points in a program.

When you select a set of join points, you provide advice for them.

One of the hard things about testing a widespread crosscutting concern is that it can advise so many join points.

Note that in some cases (indicated in parentheses) join points are not identified with pointcuts.

In contrast to join points, pointcuts are defined in aspects.

To define the join points where I will handle exceptions.

Some primitive pointcuts match only join points of a specific kind (for example, method executions).

For example, how would you capture join points requiring transaction management or authorization?

For example, an aspect related to persistence might need access to an object's initialization join points.

This is a useful option when there is a clear way to express participating join points.

For example, plain Java programs execute join points such as method calls and field sets.

As the annotation type to capture join points, whereas in another system the annotation type might be

Advice invoking authentication for the Account at the join points specified by the pointcut

Join points correspond to reads and writes of fields; in this case, an assignment of the

Unintentional capturing of join points when using wildcards

AOP tools provide a mechanism for identifying sets of join points, called a

At the join points specified by the pointcut