stack/core/src/main/java/org/apache/usergrid/corepersistence/asyncevents/AsyncIndexProvider.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.usergrid.corepersistence.asyncevents;


import org.apache.usergrid.corepersistence.index.CollectionVersionFig;
import org.apache.usergrid.corepersistence.index.CollectionVersionManagerFactory;
import org.apache.usergrid.corepersistence.index.IndexLocationStrategyFactory;
import org.apache.usergrid.corepersistence.index.IndexProcessorFig;
import org.apache.usergrid.corepersistence.rx.impl.AllEntityIdsObservable;
import org.apache.usergrid.persistence.collection.EntityCollectionManagerFactory;
import org.apache.usergrid.persistence.core.rx.RxTaskScheduler;
import org.apache.usergrid.persistence.core.metrics.MetricsFactory;
import org.apache.usergrid.persistence.graph.GraphManagerFactory;
import org.apache.usergrid.persistence.index.EntityIndexFactory;
import org.apache.usergrid.persistence.index.impl.IndexProducer;
import org.apache.usergrid.persistence.queue.LegacyQueueManager;
import org.apache.usergrid.persistence.map.MapManagerFactory;
import org.apache.usergrid.persistence.queue.LegacyQueueFig;
import org.apache.usergrid.persistence.queue.LegacyQueueManagerFactory;

import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;

import static org.apache.usergrid.persistence.queue.LegacyQueueManager.Implementation.DISTRIBUTED;
import static org.apache.usergrid.persistence.queue.LegacyQueueManager.Implementation.LOCAL;


/**
 * A provider to allow users to configure their queue impl via properties
 */
@Singleton
public class AsyncIndexProvider implements Provider<AsyncEventService> {

    private final IndexProcessorFig indexProcessorFig;

    private final LegacyQueueManagerFactory queueManagerFactory;
    private final MetricsFactory metricsFactory;
    private final RxTaskScheduler rxTaskScheduler;
    private final EntityCollectionManagerFactory entityCollectionManagerFactory;
    private final EventBuilder eventBuilder;
    private final IndexLocationStrategyFactory indexLocationStrategyFactory;
    private final EntityIndexFactory entityIndexFactory;
    private final IndexProducer indexProducer;
    private final MapManagerFactory mapManagerFactory;
    private final LegacyQueueFig queueFig;
    private final CollectionVersionFig collectionVersionFig;
    private final CollectionVersionManagerFactory collectionVersionManagerFactory;
    private final GraphManagerFactory graphManagerFactory;
    private final AllEntityIdsObservable allEntityIdsObservable;

    private AsyncEventService asyncEventService;


    @Inject
    public AsyncIndexProvider(final IndexProcessorFig indexProcessorFig,
                              final LegacyQueueManagerFactory queueManagerFactory,
                              final MetricsFactory metricsFactory,
                              @EventExecutionScheduler final RxTaskScheduler rxTaskScheduler,
                              final EntityCollectionManagerFactory entityCollectionManagerFactory,
                              final EventBuilder eventBuilder,
                              final IndexLocationStrategyFactory indexLocationStrategyFactory,
                              final EntityIndexFactory entityIndexFactory,
                              final IndexProducer indexProducer,
                              final MapManagerFactory mapManagerFactory,
                              final LegacyQueueFig queueFig,
                              final CollectionVersionFig collectionVersionFig,
                              final CollectionVersionManagerFactory collectionVersionManagerFactory,
                              final GraphManagerFactory graphManagerFactory,
                              final AllEntityIdsObservable allEntityIdsObservable) {

        this.indexProcessorFig = indexProcessorFig;
        this.queueManagerFactory = queueManagerFactory;
        this.metricsFactory = metricsFactory;
        this.rxTaskScheduler = rxTaskScheduler;
        this.entityCollectionManagerFactory = entityCollectionManagerFactory;
        this.eventBuilder = eventBuilder;
        this.indexLocationStrategyFactory = indexLocationStrategyFactory;
        this.entityIndexFactory = entityIndexFactory;
        this.indexProducer = indexProducer;
        this.mapManagerFactory = mapManagerFactory;
        this.queueFig = queueFig;
        this.collectionVersionFig = collectionVersionFig;
        this.collectionVersionManagerFactory = collectionVersionManagerFactory;
        this.graphManagerFactory = graphManagerFactory;
        this.allEntityIdsObservable = allEntityIdsObservable;
    }


    @Override
    @Singleton
    public AsyncEventService get() {
        if (asyncEventService == null) {
            asyncEventService = getIndexService();
        }

        return asyncEventService;
    }


    private AsyncEventService getIndexService() {
        final String value = indexProcessorFig.getQueueImplementation();

        final LegacyQueueManager.Implementation impl = LegacyQueueManager.Implementation.valueOf(value);

        final AsyncEventServiceImpl asyncEventService = new AsyncEventServiceImpl(
            queueManagerFactory,
            indexProcessorFig,
            indexProducer,
            metricsFactory,
            entityCollectionManagerFactory,
            indexLocationStrategyFactory,
            entityIndexFactory,
            eventBuilder,
            mapManagerFactory,
            queueFig,
            collectionVersionFig,
            collectionVersionManagerFactory,
            graphManagerFactory,
            allEntityIdsObservable,
            rxTaskScheduler );

        if ( impl.equals( LOCAL )) {
            asyncEventService.MAX_TAKE = 1000;
        }

        if ( impl.equals( DISTRIBUTED )) {
            asyncEventService.MAX_TAKE = 500;
        }

        return asyncEventService;
    }
}