com.gs.fw.common.mithra.cacheloader.CacheLoaderManagerImpl 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.cacheloader;


import com.gs.collections.impl.list.mutable.FastList;
import com.gs.collections.impl.map.mutable.UnifiedMap;
import com.gs.fw.common.mithra.util.BooleanFilter;
import com.gs.fw.common.mithra.util.Filter;
import com.gs.fw.common.mithra.util.TrueFilter;

import java.io.InputStream;
import java.sql.Timestamp;
import java.util.List;
import java.util.Map;

public final class CacheLoaderManagerImpl implements CacheLoaderManager
{
    private List topLevelLoaderFactories = FastList.newList();
    private List dependentSetLoaderFactories = FastList.newList();
    private ConfigValues configValues = new ConfigValues();

    public void runInitialLoad(List businessDates, Timestamp initialLoadEndTime, CacheLoaderMonitor monitor)
    {
        CacheLoaderContext context = new CacheLoaderContext(this, businessDates);
        context.setInitialLoadEndTime(initialLoadEndTime);
        context.execute(monitor);
        this.stampLatestRefreshTime(initialLoadEndTime);
    }

    public void runRefresh(List businessDates, RefreshInterval refreshInterval, CacheLoaderMonitor monitor)
    {
        CacheLoaderContext context = new CacheLoaderContext(this, businessDates);
        context.setRefreshInterval(refreshInterval);
        context.execute(monitor);
        this.stampLatestRefreshTime(refreshInterval.getEnd());
    }

    public void runQualifiedLoad(List businessDates,
                                 Map classesToLoadWithAdditionalOperations,
                                 boolean loadDependent,
                                 CacheLoaderMonitor monitor)
    {
        CacheLoaderContext context = new CacheLoaderContext(this, businessDates);
        context.setQualifiedLoadContext(new QualifiedByOperationLoadContext(classesToLoadWithAdditionalOperations, loadDependent));
        context.execute(monitor);
    }

    public void loadConfiguration(InputStream configFile)
    {
        CacheLoaderConfig config = new CacheLoaderConfig();
        config.parseConfiguration(configFile);
        this.configValues = config.readConfigValues();
        this.topLevelLoaderFactories = config.readTopLevelLoaderFactories();
        this.dependentSetLoaderFactories = config.readDependentLoaderFactories();

        List ownerLoaderFactories = FastList.newList(this.topLevelLoaderFactories);
        ownerLoaderFactories.addAll(this.dependentSetLoaderFactories);

        for (DependentLoaderFactory each : this.dependentSetLoaderFactories)
        {
            each.findOwnerLoaderFactory(ownerLoaderFactories);
        }

        this.resolveSourceAttributesForDependentLoaders();
    }

    private void stampLatestRefreshTime(Timestamp latestRefreshTime)
    {
        long time = latestRefreshTime.getTime();
        for (LoaderFactory each : this.topLevelLoaderFactories)
        {
            each.getClassController().getFinderInstance().getMithraObjectPortal().setLatestRefreshTime(time);
        }
        for (LoaderFactory each : this.dependentSetLoaderFactories)
        {
            each.getClassController().getFinderInstance().getMithraObjectPortal().setLatestRefreshTime(time);
        }
    }

    private void resolveSourceAttributesForDependentLoaders()
    {
        boolean changed = true;
        while (changed)
        {
            changed = false;
            for (DependentLoaderFactory each : this.dependentSetLoaderFactories)
            {
                if (each.pullOwnerSourceAttributes())
                {
                    changed = true;
                }
            }
        }

        for (DependentLoaderFactory each : this.dependentSetLoaderFactories)
        {
            if (each.getSourceAttributes() == null)
            {
                throw new RuntimeException("did not resolve source attributes on " + each);
            }
        }
    }

    public Map createCacheFilterOfDatesToKeep(List businessDates)
    {
        UnifiedMap filterMap = UnifiedMap.newMap();
        if (businessDates == null || businessDates.isEmpty())
        {
            BooleanFilter trueFilter = TrueFilter.instance();
            for (TopLevelLoaderFactory factory : this.zGetTopLevelLoaderFactories())
            {
                filterMap.put(factory.getClassToLoad(), trueFilter);
            }
            for (DependentLoaderFactory factory : this.zGetDependentSetLoaderFactories())
            {
                filterMap.put(factory.getClassToLoad(), trueFilter);
            }
        }
        else
        {
            for (Timestamp businessDate : businessDates)
            {
                for (TopLevelLoaderFactory factory : this.zGetTopLevelLoaderFactories())
                {
                    this.addBusinessDateFilterToClassMap(businessDate, factory, filterMap);
                }

                for (DependentLoaderFactory factory : this.zGetDependentSetLoaderFactories())
                {
                    this.addBusinessDateFilterToClassMap(businessDate, factory, filterMap);
                }
            }
        }

        return filterMap;
    }

    @Override
    public void loadDependentObjectsFor(List ownerObjects, List businessDates, Timestamp loadEndTime, CacheLoaderMonitor monitor)
    {
        if (ownerObjects != null && !ownerObjects.isEmpty())
        {
            CacheLoaderContext context = new CacheLoaderContext(this, businessDates);
            context.setQualifiedLoadContext(new QualifiedByOwnerObjectListLoadContext(ownerObjects));
            context.execute(monitor);
        }
    }

    private void addBusinessDateFilterToClassMap(Timestamp businessDate, LoaderFactory factory, Map map)
    {
        BooleanFilter filter = factory.createCacheFilterOfDatesToDrop(businessDate);

        String className = factory.getClassToLoad();
        Filter otherFilter = map.get(className);
        filter = otherFilter == null ? filter : filter.and(otherFilter);
        map.put(className, filter);
    }

    public List zGetTopLevelLoaderFactories()
    {
        return this.topLevelLoaderFactories;
    }


    public List zGetDependentSetLoaderFactories()
    {
        return this.dependentSetLoaderFactories;
    }

    public void configure(CacheLoaderEngine engine)
    {
        engine.setConfigValues(this.configValues);
    }
}