com.gs.fw.common.mithra.list.UpdateOriginalObjectsFromDetachedList Maven / Gradle / Ivy

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/*
 Copyright 2016 Goldman Sachs.
 Licensed 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 com.gs.fw.common.mithra.list;

import com.gs.collections.impl.map.mutable.UnifiedMap;
import com.gs.fw.common.mithra.MithraList;
import com.gs.fw.common.mithra.MithraTransaction;
import com.gs.fw.common.mithra.MithraTransactionalObject;
import com.gs.fw.common.mithra.TransactionalCommand;
import com.gs.fw.common.mithra.finder.Operation;
import com.gs.fw.common.mithra.finder.RelatedFinder;
import com.gs.fw.common.mithra.util.StatisticCounter;
import com.gs.fw.finder.Navigation;
import java.util.Iterator;
import java.util.List;
import java.util.Map;



public class UpdateOriginalObjectsFromDetachedList implements TransactionalCommand
{
    private List toUpdateOrInsertList;
    private List toDeleteList;
    private MithraList list;

    public UpdateOriginalObjectsFromDetachedList(List toUpdateOrInsertList, List toDeleteList, MithraList list)
    {
        this.toUpdateOrInsertList = toUpdateOrInsertList;
        this.toDeleteList = toDeleteList;
        this.list = list;
    }

    public Object executeTransaction(MithraTransaction tx) throws Throwable
    {
        Map navigationStats = this.findNavigatedRelationships();
        this.setDetachedModeForUpdateCounters(navigationStats, true);
        refresh(tx, navigationStats);
        update();
        delete();
        insert();
        this.setDetachedModeForUpdateCounters(navigationStats, false);
        return null;
    }

    private Map findNavigatedRelationships()
    {
        Map navigationStats = UnifiedMap.newMap();
        if (this.toUpdateOrInsertList != null)
        {
            for (int i = 0, size = this.toUpdateOrInsertList.size(); i < size; i++)
            {
                T obj = this.toUpdateOrInsertList.get(i);
                obj.zAddNavigatedRelationshipsStats(obj.zGetPortal().getFinder(), navigationStats);
            }
        }
        if (this.toDeleteList != null)
        {
            for (int i = 0, size = this.toDeleteList.size(); i < size; i++)
            {
                T obj = this.toDeleteList.get(i);
                obj.zAddNavigatedRelationshipsStats(obj.zGetPortal().getFinder(), navigationStats);
            }
        }
        return retainOnlyStatsWithHits(navigationStats);
    }

    public static Map retainOnlyStatsWithHits(Map navigationStats)
    {
        for (Iterator finderIterator  = navigationStats.keySet().iterator(); finderIterator.hasNext();)
        {
            StatisticCounter stat = navigationStats.get(finderIterator.next());
            if (stat.getHits() == 0)
            {
                finderIterator.remove();
            }
        }
        return navigationStats;
    }

    private void setDetachedModeForUpdateCounters(Map navigationStats, boolean detachedMode)
    {
        for (RelatedFinder navigatedRelationship : navigationStats.keySet())
        {
            navigatedRelationship.getMithraObjectPortal().getPerClassUpdateCountHolder().setUpdateCountDetachedMode(detachedMode);
        }
    }

    private void insert()
    {
        if (toUpdateOrInsertList != null)
        {
            for(int i=0;i navigationStats)
    {
        if (list != null && (this.toDeleteList != null || this.toUpdateOrInsertList != null))
        {
            boolean optimisticRelevant = navigationStats.isEmpty();
            if (optimisticRelevant)
            {
                Operation op = list.getOperation();
                if (op == null)
                {
                    optimisticRelevant = !list.isEmpty() && list.get(0).zGetPortal().getTxParticipationMode(tx).isOptimisticLocking();
                }
                else
                {
                    optimisticRelevant = op.getResultObjectPortal().getTxParticipationMode(tx).isOptimisticLocking();
                }

            }
            if (!navigationStats.isEmpty())
            {
                for (RelatedFinder navigatedRelationship : navigationStats.keySet())
                {
                    StatisticCounter stats = navigationStats.get(navigatedRelationship);

                    if (this.deepFetchIsEfficientToUse(stats))
                    {
                        this.list.deepFetch((Navigation) navigatedRelationship);
                    }
                }
            }
            if (!optimisticRelevant)
            {
                Operation op = list.getOperation();
                if (op == null)
                {
                    list.forceRefresh();
                }
                else
                {
                    list.forceResolve();
                }
            }
        }
    }

    private static final float HIT_RATE_THRESHOLD = 0.80f;
    private static final int ITEM_COUNT_THRESHOLD = 10000;

    private boolean deepFetchIsEfficientToUse(StatisticCounter stats)
    {
        if (stats.getHits() == 1)
        {
            return false;
        }
        if (stats.getHitRate() > HIT_RATE_THRESHOLD)
        {
            return true;
        }
        if (stats.getTotal() < ITEM_COUNT_THRESHOLD)
        {
            return true;
        }
        return stats.getHits() > 10;
    }
}