Introducing Spring Framework

Chapter 8 ■ Give Advice to Your Spring Application
2014-02-23 21:07:04,680 DEBUG [main] @@@(Caching) Is cachable!!
2014-02-23 21:07:04,680 DEBUG [main] @@@(Caching) Found in Cache!
2014-02-23 21:07:04,680 DEBUG [main] It should be now cached!
2014-02-23 21:07:04,680 DEBUG [main] @@@(Caching) review if this call is cachable...
2014-02-23 21:07:04,680 DEBUG [main] @@@(Caching) Is cachable!!
2014-02-23 21:07:04,680 DEBUG [main] @@@(Caching) Found in Cache!
AOP with Annotations
The Spring Framework also supports and plays nice with AspectJ. AspectJ is the library that initially started providing
AOP support for Java by providing a compiler and a new aspect programming language; later it provided some Java 5
annotation features. So the Spring Framework AOP extension provides support for @Aspect, @Before, @After,
@AfterReturning, @Around, and @AfterThrowing annotations. Listing 8-17 is an example of your caching solution
using AspectJ and Spring.
Listing 8-17. Caching.java
package com.apress.isf.spring.annotated.aop;
import java.util.HashMap;
import java.util.Map;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import com.apress.isf.java.model.Type;
import com.apress.isf.spring.aop.CachingModule;
@Component
@Aspect
public class Caching {
private static final Logger log = LoggerFactory.getLogger(CachingModule.class);
private static final Map cache = new HashMap();
@Around("execution(* com.apress.isf.java.service.SearchEngine.*(..))")
public Object caching(ProceedingJoinPoint pjp) throws Throwable {
Object result = null;
Type documentType = null;
log.debug("@@@(Caching) review if this call is cachable...");
if("findByType".equals(pjp.getSignature().getName()) &&
pjp.getArgs().length == 1 && pjp.getArgs()[0] instanceof Type){
documentType = (Type)pjp.getArgs()[0];
log.debug("@@@(Caching) Is cachable!!");
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