uk.gov.ofwat.fountain.aspect.cache.dao.specific.lockDao.LockDaoAspect.java Source code

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Here is the source code for uk.gov.ofwat.fountain.aspect.cache.dao.specific.lockDao.LockDaoAspect.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.lockDao;

import java.util.ArrayList;
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 clover.org.jfree.ui.about.SystemProperties;

import uk.gov.ofwat.fountain.aspect.cache.dao.DaoCache;
import uk.gov.ofwat.fountain.dao.LockDao;
import uk.gov.ofwat.fountain.domain.Lock;
import uk.gov.ofwat.fountain.domain.User;
import uk.gov.ofwat.fountain.domain.form.DataKey;

/**
 * log time taken to execute a method.
 * 
 */
@Aspect
@Order(248)
public class LockDaoAspect extends DaoCache {

    private Map<String, Lock> cacheByKey;
    private LockDao lockDao;

    public void setLockDao(LockDao lockDao) {
        this.lockDao = lockDao;
    }

    public Map getCache() {
        return cacheByKey;
    }

    @SuppressWarnings("unchecked")
    public void setCache(Map cache) {
        cacheByKey = cache;
        // load existing locks from database
        for (Lock lock : lockDao.getAllLocks()) {
            DataKey key = new DataKey();
            key.setItemId(lock.getItemId());
            key.setIntervalId(lock.getIntervalId());
            key.setCompanyId(lock.getCompanyId());
            cacheByKey.put(key.getKey(false), lock);
        }
    }

    //    create
    @SuppressWarnings("unchecked")
    @Around("execution(public * uk.gov.ofwat.fountain.dao.LockDao+.create(uk.gov.ofwat.fountain.domain.Lock))")
    public int cacheOnCreate(ProceedingJoinPoint pjp) throws Throwable {
        if (!isEnabled()) {
            return (Integer) pjp.proceed();
        }
        if (null == getCache()) {
            initialiseCache(pjp.getTarget().getClass());
        }

        Object[] args = pjp.getArgs();
        Lock lock = (Lock) args[0];

        DataKey key = new DataKey();
        key.setItemId(lock.getItemId());
        key.setIntervalId(lock.getIntervalId());
        key.setCompanyId(lock.getCompanyId());

        Integer retVal = null;
        if (cacheByKey.containsKey(key.getKey(false))) {
            Lock lockFromCache = cacheByKey.get(key.getKey(false));
            retVal = lockFromCache.getId();
        } else {
            retVal = (Integer) pjp.proceed();
            cacheByKey.put(key.getKey(false), lock);
            incrementCache(pjp);
        }

        return retVal;
    }

    //   deleteLocksForUser
    @SuppressWarnings("unchecked")
    @Around("execution(void uk.gov.ofwat.fountain.dao.LockDao+.deleteLocksForUser(uk.gov.ofwat.fountain.domain.User))")
    public void removeOnDeleteLocksForUser(ProceedingJoinPoint pjp) throws Throwable {
        if (!isEnabled()) {
            pjp.proceed();
            return;
        }
        if (null == getCache()) {
            pjp.proceed();
            return;
        }

        Object[] args = pjp.getArgs();
        User user = (User) args[0];

        pjp.proceed();
        List<Lock> locksToRemove = new ArrayList<Lock>();
        synchronized (cacheByKey) {
            for (Lock lock : cacheByKey.values()) {
                if (lock.getUser().equals(user)) {
                    locksToRemove.add(lock);
                }
            }
        }
        for (Lock lock : locksToRemove) {
            DataKey key = new DataKey();
            key.setItemId(lock.getItemId());
            key.setIntervalId(lock.getIntervalId());
            key.setCompanyId(lock.getCompanyId());
            cacheByKey.remove(key.getKey(false));
            //   TODO decrementCache(pjp);
        }
    }

    //   getLockingUser
    @Around("execution(public uk.gov.ofwat.fountain.domain.User uk.gov.ofwat.fountain.dao.LockDao+.getLockingUser(int, int, int))")
    public User cacheOnGetLockingUser(ProceedingJoinPoint pjp) throws Throwable {
        if (!isEnabled()) {
            return (User) pjp.proceed();
        }
        if (null == getCache()) {
            initialiseCache(pjp.getTarget().getClass());
        }

        Object[] args = pjp.getArgs();
        DataKey key = new DataKey();
        key.setItemId((Integer) args[0]);
        key.setIntervalId((Integer) args[1]);
        key.setCompanyId((Integer) args[2]);

        User retVal = null;
        if (cacheByKey.containsKey(key.getKey(false))) {
            retVal = cacheByKey.get(key.getKey(false)).getUser();
        } else {
            retVal = null;
        }

        return retVal;
    }

    //   deleteExpiredLocks
    @SuppressWarnings("unchecked")
    @Around("execution(void uk.gov.ofwat.fountain.dao.LockDao+.deleteExpiredLocks())")
    public void deleteExpiredLocks(ProceedingJoinPoint pjp) throws Throwable {
        if (!isEnabled()) {
            pjp.proceed();
            return;
        }
        if (null == getCache()) {
            pjp.proceed();
            return;
        }

        List<Lock> locksToRemove = lockDao.getExpiredLocks();
        List<Integer> lockIds = new ArrayList<Integer>();
        for (Lock lock : locksToRemove) {
            lockIds.add(lock.getId());
            DataKey key = new DataKey();
            key.setItemId(lock.getItemId());
            key.setIntervalId(lock.getIntervalId());
            key.setCompanyId(lock.getCompanyId());
            cacheByKey.remove(key.getKey(false));
        }
        if (!lockIds.isEmpty()) {
            lockDao.deleteLocks(lockIds);
        }
    }

    // methods NOT cached
    //   public Lock findByLockId(int lockId){
    //   public List<Lock>getLocksForUser(User user){
    //   public boolean isItemLockedByOtherUser(int itemId, int intervalId, int companyId, User currentUser) {
    //   public void refreshLock(Lock lock) {
    //   public void refreshLocks(List<Integer> lockIds) {

}