/*
* JBoss, Home of Professional Open Source
* Copyright 2011 Red Hat Inc. and/or its affiliates and other
* contributors as indicated by the @author tags. All rights reserved.
* See the copyright.txt in the distribution for a full listing of
* individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.infinispan.jcache.annotation;
import org.infinispan.jcache.logging.Log;
import org.infinispan.util.logging.LogFactory;
import javax.cache.Cache;
import javax.cache.annotation.CacheKeyGenerator;
import javax.cache.annotation.CacheKeyInvocationContext;
import javax.cache.annotation.CacheRemoveEntry;
import javax.cache.annotation.CacheResolver;
import javax.cache.annotation.GeneratedCacheKey;
import javax.inject.Inject;
import javax.interceptor.AroundInvoke;
import javax.interceptor.Interceptor;
import javax.interceptor.InvocationContext;
import java.io.Serializable;
/**
* <p>{@link javax.cache.annotation.CacheRemoveEntry} 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
*/
@Interceptor
public class CacheRemoveEntryInterceptor implements Serializable {
private static final long serialVersionUID = -9079291622309963969L;
private static final Log log = LogFactory.getLog(CacheRemoveEntryInterceptor.class, Log.class);
private final CacheResolver cacheResolver;
private final CacheKeyInvocationContextFactory contextFactory;
@Inject
public CacheRemoveEntryInterceptor(CacheResolver cacheResolver, CacheKeyInvocationContextFactory contextFactory) {
this.cacheResolver = cacheResolver;
this.contextFactory = contextFactory;
}
@AroundInvoke
public Object cacheRemoveEntry(InvocationContext invocationContext) throws Exception {
if (log.isTraceEnabled()) {
log.tracef("Interception of method named '%s'", invocationContext.getMethod().getName());
}
final CacheKeyInvocationContext<CacheRemoveEntry> cacheKeyInvocationContext = contextFactory.getCacheKeyInvocationContext(invocationContext);
final CacheKeyGenerator cacheKeyGenerator = cacheKeyInvocationContext.unwrap(CacheKeyInvocationContextImpl.class).getCacheKeyGenerator();
final Cache<GeneratedCacheKey, Object> cache = cacheResolver.resolveCache(cacheKeyInvocationContext);
final CacheRemoveEntry cacheRemoveEntry = cacheKeyInvocationContext.getCacheAnnotation();
final GeneratedCacheKey cacheKey = cacheKeyGenerator.generateCacheKey(cacheKeyInvocationContext);
if (!cacheRemoveEntry.afterInvocation()) {
cache.remove(cacheKey);
if (log.isTraceEnabled()) {
log.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 (log.isTraceEnabled()) {
log.tracef("Remove entry with key '%s' in cache '%s' after method invocation", cacheKey, cache.getName());
}
}
return result;
}
}