package org.infinispan.jcache.annotation;
import org.infinispan.jcache.logging.Log;
import javax.cache.Cache;
import javax.cache.annotation.CacheKeyGenerator;
import javax.cache.annotation.CacheKeyInvocationContext;
import javax.cache.annotation.CacheRemove;
import javax.cache.annotation.CacheResolver;
import javax.cache.annotation.GeneratedCacheKey;
import javax.interceptor.InvocationContext;
import java.io.Serializable;
/**
* <p>{@link javax.cache.annotation.CacheRemove} interceptor implementation.This interceptor uses the following algorithm describes in
* JSR-107.</p>
*
* <p>The interceptor that intercepts method annotated with {@code @CacheRemoveEntry} must do the following, generate a
* key based on InvocationContext using the specified {@link javax.cache.annotation.CacheKeyGenerator}, use this key to remove the entry in the
* cache. The remove occurs after the method body is executed. This can be overridden by specifying a afterInvocation
* attribute value of false. If afterInvocation is true and the annotated method throws an exception the remove will not
* happen.</p>
*
* @author Kevin Pollet <kevin.pollet@serli.com> (C) 2011 SERLI
* @author Galder Zamarreño
*/
public abstract class AbstractCacheRemoveEntryInterceptor implements Serializable {
private static final long serialVersionUID = -9079291622309963969L;
private final CacheResolver cacheResolver;
private final CacheKeyInvocationContextFactory contextFactory;
public AbstractCacheRemoveEntryInterceptor(CacheResolver cacheResolver, CacheKeyInvocationContextFactory contextFactory) {
this.cacheResolver = cacheResolver;
this.contextFactory = contextFactory;
}
public Object cacheRemoveEntry(InvocationContext invocationContext) throws Exception {
if (getLog().isTraceEnabled()) {
getLog().tracef("Interception of method named '%s'", invocationContext.getMethod().getName());
}
final CacheKeyInvocationContext<CacheRemove> cacheKeyInvocationContext = contextFactory.getCacheKeyInvocationContext(invocationContext);
final CacheKeyGenerator cacheKeyGenerator = cacheKeyInvocationContext.unwrap(CacheKeyInvocationContextImpl.class).getCacheKeyGenerator();
final Cache<GeneratedCacheKey, Object> cache = cacheResolver.resolveCache(cacheKeyInvocationContext);
final CacheRemove cacheRemoveEntry = cacheKeyInvocationContext.getCacheAnnotation();
final GeneratedCacheKey cacheKey = cacheKeyGenerator.generateCacheKey(cacheKeyInvocationContext);
if (!cacheRemoveEntry.afterInvocation()) {
cache.remove(cacheKey);
if (getLog().isTraceEnabled()) {
getLog().tracef("Remove entry with key '%s' in cache '%s' before method invocation", cacheKey, cache.getName());
}
}
final Object result = invocationContext.proceed();
if (cacheRemoveEntry.afterInvocation()) {
cache.remove(cacheKey);
if (getLog().isTraceEnabled()) {
getLog().tracef("Remove entry with key '%s' in cache '%s' after method invocation", cacheKey, cache.getName());
}
}
return result;
}
protected abstract Log getLog();
}