org.axonframework.eventsourcing.eventstore.mongo.documentperevent.DocumentPerEventStorageStrategy.java Source code

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Here is the source code for org.axonframework.eventsourcing.eventstore.mongo.documentperevent.DocumentPerEventStorageStrategy.java

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/*
 * Copyright (c) 2010-2016. Axon Framework
 * 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 org.axonframework.eventsourcing.eventstore.mongo.documentperevent;

import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import org.axonframework.eventhandling.EventMessage;
import org.axonframework.eventsourcing.DomainEventMessage;
import org.axonframework.eventsourcing.eventstore.DomainEventData;
import org.axonframework.eventsourcing.eventstore.EventUtils;
import org.axonframework.eventsourcing.eventstore.TrackedEventData;
import org.axonframework.eventsourcing.eventstore.mongo.AbstractMongoEventStorageStrategy;
import org.axonframework.serialization.Serializer;

import java.util.List;
import java.util.stream.Stream;

/**
 * @author Rene de Waele
 */
public class DocumentPerEventStorageStrategy extends AbstractMongoEventStorageStrategy {

    public DocumentPerEventStorageStrategy() {
        this(EventEntryConfiguration.getDefault());
    }

    public DocumentPerEventStorageStrategy(EventEntryConfiguration eventConfiguration) {
        super(eventConfiguration);
    }

    @Override
    protected Stream<DBObject> createEventDocuments(List<? extends EventMessage<?>> events, Serializer serializer) {
        return events.stream().map(EventUtils::asDomainEventMessage).map(event -> new EventEntry(event, serializer))
                .map(entry -> entry.asDBObject(eventConfiguration()));
    }

    @Override
    protected DBObject createSnapshotDocument(DomainEventMessage<?> snapshot, Serializer serializer) {
        return new EventEntry(snapshot, serializer).asDBObject(eventConfiguration());
    }

    @Override
    protected Stream<? extends DomainEventData<?>> extractDomainEvents(DBObject object) {
        return Stream.of(extractEvent(object));
    }

    @Override
    protected DBCursor applyBatchSize(DBCursor cursor, int batchSize) {
        return cursor.limit(batchSize);
    }

    @Override
    protected Stream<? extends TrackedEventData<?>> extractTrackedEvents(DBObject object) {
        return Stream.of(extractEvent(object));
    }

    @Override
    protected DomainEventData<?> extractSnapshot(DBObject object) {
        return extractEvent(object);
    }

    private EventEntry extractEvent(DBObject object) {
        return new EventEntry(object, eventConfiguration());
    }
}