org.eigengo.rsa.text.v100.TextEntity.java Source code

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Here is the source code for org.eigengo.rsa.text.v100.TextEntity.java

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/*
 * The Reactive Summit Austin talk
 * Copyright (C) 2016 Jan Machacek
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package org.eigengo.rsa.text.v100;

import akka.NotUsed;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.google.common.base.Objects;
import com.google.protobuf.ByteString;
import com.lightbend.lagom.javadsl.persistence.AggregateEvent;
import com.lightbend.lagom.javadsl.persistence.AggregateEventTag;
import com.lightbend.lagom.javadsl.persistence.PersistentEntity;
import com.lightbend.lagom.serialization.CompressedJsonable;
import com.lightbend.lagom.serialization.Jsonable;
import org.eigengo.rsa.Envelope;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import scala.collection.JavaConversions;
import scala.collection.Seq;

import javax.annotation.concurrent.Immutable;
import java.util.Arrays;
import java.util.Optional;
import java.util.UUID;

class TextEntity extends PersistentEntity<TextEntityCommand, TextEntityEvent, NotUsed> {
    private static final Logger log = LoggerFactory.getLogger(TextEntity.class);

    private TextEntityEvent.Ocred ocr(TextEntityCommand.Ocr ocr) {
        log.info("Performing OCR for {}", ocr.correlationId);
        return new TextEntityEvent.Ocred(entityId(), ocr.correlationId, ocr.ingestionTimestamp, System.nanoTime(),
                new String[] { "text" });
    }

    public Behavior initialBehavior(Optional<NotUsed> snapshotState) {
        BehaviorBuilder b = newBehaviorBuilder(null);
        b.setCommandHandler(TextEntityCommand.Ocr.class, (cmd, ctx) -> {
            TextEntityEvent.Ocred event = ocr(cmd);
            return ctx.thenPersist(event, e -> ctx.reply(NotUsed.getInstance()));
        });
        b.setEventHandler(TextEntityEvent.Ocred.class, e -> NotUsed.getInstance());
        return b.build();
    }
}

interface TextEntityEvent extends Jsonable {
    class OcredTag {
        static AggregateEventTag<Ocred> INSTANCE = AggregateEventTag.of(Ocred.class, "text");
    }

    @Immutable
    @JsonDeserialize
    class Ocred implements TextEntityEvent, CompressedJsonable, AggregateEvent<Ocred> {
        final String handle;
        final String correlationId;
        final long ingestionTimestamp;
        final long processingTimestamp;
        final String[] areas;

        @JsonCreator
        Ocred(String handle, String correlationId, long ingestionTimestamp, long processingTimestamp,
                String[] areas) {
            this.handle = handle;
            this.correlationId = correlationId;
            this.ingestionTimestamp = ingestionTimestamp;
            this.processingTimestamp = processingTimestamp;
            this.areas = areas;
        }

        Envelope envelope() {
            Seq<String> areas = JavaConversions.asScalaBuffer(Arrays.asList(this.areas));
            Text payload = Text.apply(areas);

            return Envelope.apply(100, this.processingTimestamp, this.ingestionTimestamp, this.handle,
                    this.correlationId, UUID.randomUUID().toString(), "text",
                    ByteString.copyFrom(payload.toByteArray()));
        }

        @Override
        public boolean equals(Object o) {
            if (this == o)
                return true;
            if (o == null || getClass() != o.getClass())
                return false;
            Ocred ocred = (Ocred) o;
            return ingestionTimestamp == ocred.ingestionTimestamp
                    && processingTimestamp == ocred.processingTimestamp
                    && Objects.equal(correlationId, ocred.correlationId) && Objects.equal(handle, ocred.handle)
                    && Objects.equal(areas, ocred.areas);
        }

        @Override
        public int hashCode() {
            return Objects.hashCode(correlationId, handle, ingestionTimestamp, processingTimestamp, areas);
        }

        @Override
        public AggregateEventTag<Ocred> aggregateTag() {
            return OcredTag.INSTANCE;
        }
    }

}

interface TextEntityCommand extends Jsonable {

    @Immutable
    @JsonDeserialize
    class Ocr implements TextEntityCommand, CompressedJsonable, PersistentEntity.ReplyType<NotUsed> {
        final String correlationId;
        final long ingestionTimestamp;
        final byte[] image;

        @JsonCreator
        public Ocr(String correlationId, long ingestionTimestamp, byte[] image) {
            this.correlationId = correlationId;
            this.ingestionTimestamp = ingestionTimestamp;
            this.image = image;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o)
                return true;
            if (o == null || getClass() != o.getClass())
                return false;
            Ocr ocr = (Ocr) o;
            return ingestionTimestamp == ocr.ingestionTimestamp && Objects.equal(correlationId, ocr.correlationId)
                    && Objects.equal(image, ocr.image);
        }

        @Override
        public int hashCode() {
            return Objects.hashCode(correlationId, ingestionTimestamp, image);
        }
    }

}