uk.gov.ofwat.fountain.aspect.cache.dao.specific.dataDao.LatestDataAspect.java Source code

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

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/*
 *  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.dataDao;

import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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.GroupDao;
import uk.gov.ofwat.fountain.dao.ItemDao;
import uk.gov.ofwat.fountain.domain.Data;

/**
 * Cache for latest data - clears on changes to itemDao
 * 
 */
@Aspect
@Order(255)
public class LatestDataAspect extends DaoCache implements UpdateListener {
    private static final Log log = LogFactory.getLog(LatestDataAspect.class);

    private Map<String, Object> cacheLatestData;

    public Map getCache() {
        return cacheLatestData;
    }

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

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

    public void setGroupDao(GroupDao groupDao) {
        groupDao.addItemUpdateListener(this);
    }

    public void updateOccurred() {
        initialiseCache();
    }

    //   @Around("execution(public uk.gov.ofwat.fountain.domain.Data uk.gov.ofwat.fountain.dao.DataDao.getLatestData(int, int, int, int)) || execution(public uk.gov.ofwat.fountain.domain.Data uk.gov.ofwat.fountain.dao.DataDao.getBranchData(int, int, int, int, int))")
    @Around("execution(public uk.gov.ofwat.fountain.domain.Data uk.gov.ofwat.fountain.dao.DataDao.getLatestData(int, int, int, int))")
    public Object cacheOnLatestData(ProceedingJoinPoint pjp) throws Throwable {
        if (!isEnabled()) {
            return pjp.proceed();
        }
        if (null == getCache()) {
            initialiseCache(pjp.getTarget().getClass());
        }

        Object[] args = pjp.getArgs();
        String key = "";
        for (int i = 0; i < args.length; i++) {
            key = key + (Integer) args[i] + "-";
        }

        Object retVal = null;
        if (cacheLatestData.containsKey(key)) {
            retVal = cacheLatestData.get(key);
        } else {
            retVal = pjp.proceed();
            cacheLatestData.put(key, retVal);
            incrementCache(pjp);
        }

        return retVal;
    }

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

    @Around("execution(public void uk.gov.ofwat.fountain.dao.DataDao.updateValue(uk.gov.ofwat.fountain.domain.Data, uk.gov.ofwat.fountain.domain.Audit))")
    public void removeFromCacheOnUpdate(ProceedingJoinPoint pjp) throws Throwable {
        if (!isEnabled()) {
            pjp.proceed();
            return;
        }
        Object[] args = pjp.getArgs();
        pjp.proceed(args);
        if (null != cacheLatestData) {
            Data data = (Data) args[0];
            String key = data.getItem().getId() + "-" + data.getInterval().getId() + "-" + data.getCompany().getId()
                    + "-" + data.getGroupEntry().getId() + "-";
            if (null != data.getBranch()) {
                key = key + data.getBranch().getId() + "-";
            }
            cacheLatestData.remove(key);
        }
    }

    @Around("execution(public int uk.gov.ofwat.fountain.dao.DataDao.create(uk.gov.ofwat.fountain.domain.Data, uk.gov.ofwat.fountain.domain.Audit))")
    public Integer removeFromCacheOnCreate(ProceedingJoinPoint pjp) throws Throwable {
        if (!isEnabled()) {
            return (Integer) pjp.proceed();
        }

        Object[] args = pjp.getArgs();
        Integer dataId = (Integer) pjp.proceed(args);
        if (null != cacheLatestData) {
            Data data = (Data) args[0];
            String key = data.getItem().getId() + "-" + data.getInterval().getId() + "-" + data.getCompany().getId()
                    + "-" + data.getGroupEntry().getId() + "-";
            if (null != data.getBranch()) {
                key = key + data.getBranch().getId() + "-";
            }
            cacheLatestData.remove(key);
        }
        return dataId;
    }

}