uk.gov.ofwat.fountain.aspect.cache.dao.specific.potDao.FindByTableIdAspect.java Source code

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Here is the source code for uk.gov.ofwat.fountain.aspect.cache.dao.specific.potDao.FindByTableIdAspect.java

Source

/*
 *  Copyright (C) 2009 Water Services Regulation Authority (Ofwat)
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

package uk.gov.ofwat.fountain.aspect.cache.dao.specific.potDao;

import java.util.List;
import java.util.Map;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.core.annotation.Order;

import uk.gov.ofwat.fountain.aspect.cache.dao.DaoCache;
import uk.gov.ofwat.fountain.aspect.cache.dao.UpdateListener;
import uk.gov.ofwat.fountain.dao.ItemDao;
import uk.gov.ofwat.fountain.domain.Pot;

/**
 * log time taken to execute a method.
 * 
 */
@Aspect
@Order(245)
public class FindByTableIdAspect extends DaoCache implements UpdateListener {

    private Map<String, List<Pot>> cacheByTableId;

    public Map getCache() {
        return cacheByTableId;
    }

    @SuppressWarnings("unchecked")
    public void setCache(Map cache) {
        cacheByTableId = cache;
    }

    public void setItemDao(ItemDao itemDao) {
        itemDao.addItemUpdateListener(this);
    }

    public void updateOccurred() {
        initialiseCache();
    }

    @SuppressWarnings("unchecked")
    @Around("execution(* uk.gov.ofwat.fountain.dao.PotDao+.findByTableId(int))")
    public List<Pot> cacheOnFindByTableId(ProceedingJoinPoint pjp) throws Throwable {
        if (!isEnabled()) {
            return (List<Pot>) pjp.proceed();
        }
        if (null == getCache()) {
            initialiseCache(pjp.getTarget().getClass());
        }

        Object[] args = pjp.getArgs();
        String key = "" + (Integer) args[0];

        List<Pot> retVal = null;
        if (cacheByTableId.containsKey(key)) {
            retVal = cacheByTableId.get(key);
        } else {
            retVal = (List<Pot>) pjp.proceed();
            cacheByTableId.put(key, retVal);
            incrementCache(pjp);
        }

        return retVal;
    }

    @Around("execution(void uk.gov.ofwat.fountain.dao.PotDao+.delete(int))")
    public void clearCacheOnDelete(ProceedingJoinPoint pjp) throws Throwable {
        if (!isEnabled()) {
            pjp.proceed();
            return;
        }
        throw new UnsupportedOperationException(
                "uk.gov.ofwat.fountain.dao.PotDao.delete(int) has not been implemented. If you are implementing it you must implement clearCacheOnDelete()");
    }

    @Around("execution(void uk.gov.ofwat.fountain.dao.PotDao+.update(uk.gov.ofwat.fountain.domain.Pot))")
    public void clearCacheOnUpdate(ProceedingJoinPoint pjp) throws Throwable {
        if (!isEnabled()) {
            pjp.proceed();
            return;
        }

        Object[] args = pjp.getArgs();
        pjp.proceed(args);
        if (null != cacheByTableId) {
            this.clear();
        }
    }

    @Around("execution(int uk.gov.ofwat.fountain.dao.PotDao+.create(uk.gov.ofwat.fountain.domain.Pot, int))")
    public int clearCacheOnCreate(ProceedingJoinPoint pjp) throws Throwable {

        if (!isEnabled()) {
            return (Integer) pjp.proceed();
        }
        Object[] args = pjp.getArgs();
        Integer retVal = (Integer) pjp.proceed(args);
        if (null != cacheByTableId) {
            this.clear();
        }
        return retVal;
    }

}