commons-jcs-jcache/src/main/java/org/apache/commons/jcs3/jcache/cdi/CacheRemoveInterceptor.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.commons.jcs3.jcache.cdi;

import java.io.Serializable;

import javax.annotation.Priority;
import javax.cache.Cache;
import javax.cache.annotation.CacheKeyInvocationContext;
import javax.cache.annotation.CacheRemove;
import javax.cache.annotation.CacheResolver;
import javax.cache.annotation.CacheResolverFactory;
import javax.cache.annotation.GeneratedCacheKey;
import javax.inject.Inject;
import javax.interceptor.AroundInvoke;
import javax.interceptor.Interceptor;
import javax.interceptor.InvocationContext;

@CacheRemove
@Interceptor
@Priority(/*LIBRARY_BEFORE*/1000)
public class CacheRemoveInterceptor implements Serializable
{
    @Inject
    private CDIJCacheHelper helper;

    @AroundInvoke
    public Object cache(final InvocationContext ic) throws Throwable
    {
        final CDIJCacheHelper.MethodMeta methodMeta = helper.findMeta(ic);

        final String cacheName = methodMeta.getCacheRemoveCacheName();

        final CacheResolverFactory cacheResolverFactory = methodMeta.getCacheRemoveResolverFactory();
        final CacheKeyInvocationContext<CacheRemove> context = new CacheKeyInvocationContextImpl<>(
                ic, methodMeta.getCacheRemove(), cacheName, methodMeta);
        final CacheResolver cacheResolver = cacheResolverFactory.getCacheResolver(context);
        final Cache<Object, Object> cache = cacheResolver.resolveCache(context);

        final GeneratedCacheKey cacheKey = methodMeta.getCacheRemoveKeyGenerator().generateCacheKey(context);
        final CacheRemove cacheRemove = methodMeta.getCacheRemove();
        final boolean afterInvocation = methodMeta.isCacheRemoveAfter();

        if (!afterInvocation)
        {
            cache.remove(cacheKey);
        }

        final Object result;
        try
        {
            result = ic.proceed();
        }
        catch (final Throwable t)
        {
            if (afterInvocation)
            {
                if (helper.isIncluded(t.getClass(), cacheRemove.evictFor(), cacheRemove.noEvictFor()))
                {
                    cache.remove(cacheKey);
                }
            }

            throw t;
        }

        if (afterInvocation)
        {
            cache.remove(cacheKey);
        }

        return result;
    }
}