io.gravitee.gateway.services.sync.synchronizer.AbstractSynchronizer Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of gravitee-apim-gateway-services-sync Show documentation
There is a newer version: 4.5.2
Show newest version
/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * 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 io.gravitee.gateway.services.sync.synchronizer;

import static io.gravitee.gateway.services.sync.SyncManager.TIMEFRAME_AFTER_DELAY;
import static io.gravitee.gateway.services.sync.SyncManager.TIMEFRAME_BEFORE_DELAY;

import com.fasterxml.jackson.databind.ObjectMapper;
import io.gravitee.common.service.AbstractService;
import io.gravitee.repository.management.api.EventRepository;
import io.gravitee.repository.management.api.search.EventCriteria;
import io.gravitee.repository.management.model.Event;
import io.gravitee.repository.management.model.EventType;
import io.reactivex.BackpressureStrategy;
import io.reactivex.Flowable;
import java.util.List;
import java.util.concurrent.ExecutorService;
import org.springframework.beans.factory.annotation.Autowired;

/**
 * @author Jeoffrey HAEYAERT (jeoffrey.haeyaert at graviteesource.com)
 * @author GraviteeSource Team
 */
public abstract class AbstractSynchronizer extends AbstractService {

    @Autowired
    private EventRepository eventRepository;

    @Autowired
    protected ObjectMapper objectMapper;

    @Autowired
    protected ExecutorService executor;

    @Override
    protected void doStart() throws Exception {
        super.doStart();
    }

    @Override
    protected void doStop() throws Exception {
        super.doStop();
    }

    /**
     * Synchronize the elements retrieving events from the datasource.
     *
     * @param lastRefreshAt the last timestamp the synchronization has been made. If -1 an initial synchronization will be perform, then incremental synchronization will be made.
     * @param nextLastRefreshAt the timestamp of the next synchronization planed.
     * @param environments the list of environments to filter events
     */
    public abstract void synchronize(long lastRefreshAt, long nextLastRefreshAt, List environments);

    protected Flowable searchLatestEvents(
        int bulkSize,
        Long from,
        Long to,
        boolean strictMode,
        Event.EventProperties group,
        List environments,
        EventType... eventTypes
    ) {
        return Flowable.create(
            emitter -> {
                try {
                    long page = 0;
                    EventCriteria criteria = new EventCriteria.Builder()
                        .types(eventTypes)
                        .from(from == null ? 0 : from - TIMEFRAME_BEFORE_DELAY)
                        .to(to == null ? 0 : to + TIMEFRAME_AFTER_DELAY)
                        .strictMode(strictMode)
                        .environments(environments)
                        .build();

                    List events;

                    if (bulkSize > 0) {
                        do {
                            events = eventRepository.searchLatest(criteria, group, page, (long) bulkSize);
                            events.forEach(emitter::onNext);
                            page++;
                        } while (!events.isEmpty() && events.size() == bulkSize);
                    } else {
                        events = eventRepository.searchLatest(criteria, group, page, null);
                        events.forEach(emitter::onNext);
                    }

                    emitter.onComplete();
                } catch (Exception e) {
                    emitter.onError(e);
                }
            },
            BackpressureStrategy.BUFFER
        );
    }
}