Spring AOP中的切入点“或”组合

Question

I have a class BigManPlay implements an interface Performance :

@Component
public class BigManPlay implements Performance {
    @Override
    public void perform() {
        System.out.println("Performing 111!");
    }

    @Override
    public void perform2() {
        System.out.println("Performing 222!");
    }
}

Then, I expect the perform() method and every method(means perform2() ) in the Performance interface are the advice targets. So I write the following aspect class:

@Aspect
public class Audience {

    @Pointcut("execution(* Chapter_4_2_1.concert.Performance.perform(..)) or within(Chapter_4_2_1.concert.Performance+)")
    public void performance() {}

    @Before("performance()")
    public void silenceCellPhones() {
        System.out.println("Silencing cell phones");
    }
    @Before("performance()")
    public void takeSeats() {
        System.out.println("Taking seats");
    }
    @AfterReturning("performance()")
    public void applause() {
        System.out.println("CLAP CLAP CLAP!!!");
    }
}

Then a java config class to wire beans:

@Configuration
@EnableAspectJAutoProxy
@ComponentScan(basePackages = {"Chapter_4_2_1.concert"})
public class ConcertConfig {
    @Bean
    public Audience audience() {
        return new Audience();
    }
}

Then the UT class:

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes=ConcertConfig.class)
public class PerformanceTest {

    @Autowired
    Performance bigManPlay;

    @Rule
    public final SystemOutRule log = new SystemOutRule().enableLog();

    @Test
    public void testWithPerformance() {
        log.clearLog();
        bigManPlay.perform();
        assertEquals("Silencing cell phones" + System.lineSeparator()
                + "Taking seats" + System.lineSeparator()
                + "Performing 111!" + System.lineSeparator()
                + "CLAP CLAP CLAP!!!" + System.lineSeparator(), log.getLog());
    }


    @Test
    public void testWithPerformance2() {
        log.clearLog();
        bigManPlay.perform2();
        assertEquals("Silencing cell phones" + System.lineSeparator()
            + "Taking seats" + System.lineSeparator()
            + "Performing 222!" + System.lineSeparator()
            + "CLAP CLAP CLAP!!!" + System.lineSeparator(), log.getLog());
    }
}

UT is failed. testWithPerformance2() only output

Performing 222!

The within(Chapter_4_2_1.concert.Performance+) doesn't take effect, why?

Answer 1

The syntax for pointcut composition for "or" is || .

Pointcut0 || Pointcut1 Pointcut0 || Pointcut1 each join point picked out by either Pointcut0 or Pointcut1

That will look like

@Pointcut("execution(* Chapter_4_2_1.concert.Performance.perform(..)) || within(Chapter_4_2_1.concert.Performance+)")

Essentially the parser finds the first pointcut expression, the execution , and stops parsing because there are no other composition tokens in the remaining expression. You could write anything

@Pointcut("execution(* Chapter_4_2_1.concert.Performance.perform(..)) blabla")

and it wouldn't fail to parse. It would create a valid pointcut for that execution .