001// --------------------------------------------------------------------------------
002// Copyright 2002-2026 Echo Three, LLC
003//
004// Licensed under the Apache License, Version 2.0 (the "License");
005// you may not use this file except in compliance with the License.
006// You may obtain a copy of the License at
007//
008//     http://www.apache.org/licenses/LICENSE-2.0
009//
010// Unless required by applicable law or agreed to in writing, software
011// distributed under the License is distributed on an "AS IS" BASIS,
012// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013// See the License for the specific language governing permissions and
014// limitations under the License.
015// --------------------------------------------------------------------------------
016
017package com.echothree.util.server.kafka;
018
019import com.echothree.model.control.core.server.control.EntityInstanceControl;
020import com.echothree.model.data.core.server.entity.Event;
021import com.echothree.util.server.persistence.Session;
022import com.echothree.util.server.string.EntityInstanceUtils;
023import com.google.common.net.MediaType;
024import com.google.gson.Gson;
025import com.google.gson.GsonBuilder;
026import fish.payara.cloud.connectors.kafka.api.KafkaConnectionFactory;
027import java.nio.charset.StandardCharsets;
028import javax.annotation.Resource;
029import javax.enterprise.context.ApplicationScoped;
030import org.apache.http.HttpHeaders;
031import org.apache.kafka.clients.producer.ProducerRecord;
032import org.apache.kafka.common.header.Headers;
033import org.apache.kafka.common.header.internals.RecordHeader;
034import org.apache.kafka.common.header.internals.RecordHeaders;
035
036@ApplicationScoped
037public class EventTopic {
038
039    @Resource(name = "java:/KafkaConnectionFactory")
040    KafkaConnectionFactory kafkaConnectionFactory;
041
042    private static final String TOPIC = "echothree-events-json";
043
044    private final Gson gson = new GsonBuilder().serializeNulls().create();
045
046    private final Headers HEADERS_JSON = new RecordHeaders()
047            .add(new RecordHeader(HttpHeaders.CONTENT_TYPE, MediaType.JSON_UTF_8.toString().getBytes(StandardCharsets.UTF_8)));
048
049    protected EventTopic() {}
050
051    public void sendEvent(Event event) {
052        if(kafkaConnectionFactory != null) {
053            try {
054                try(var kafkaConnection = kafkaConnectionFactory.createConnection()) {
055                    var entityInstanceControl = Session.getModelController(EntityInstanceControl.class);
056                    var eventId = event.getPrimaryKey().getEntityId();
057                    var eventTime = event.getEventTime();
058                    var eventTimeSequence = event.getEventTimeSequence();
059                    var entityInstance = entityInstanceControl.ensureUuidForEntityInstance(event.getEntityInstance(), false);
060                    var entityRef = EntityInstanceUtils.getEntityRefByEntityInstance(entityInstance);
061                    var id = entityInstance.getUuid();
062                    var eventTypeName = event.getEventType().getEventTypeName();
063                    var relatedEntityRef = EntityInstanceUtils.getEntityRefByEntityInstance(event.getRelatedEntityInstance());
064                    var relatedEventType = event.getRelatedEventType();
065                    var relatedEventTypeName = relatedEventType == null ? null : relatedEventType.getEventTypeName();
066                    var createdByEntityRef = EntityInstanceUtils.getEntityRefByEntityInstance(event.getCreatedBy());
067
068//                    var value = "eventId = " + eventId
069//                            + ", eventTime = " + eventTime
070//                            + ", eventTimeSequence = " + eventTimeSequence
071//                            + ", entityRef = " + entityRef
072//                            + ", id = " + id
073//                            + ", eventType = " + eventTypeName
074//                            + ", relatedEntityInstance = " + relatedEntityRef
075//                            + ", relatedEventType = " + relatedEventTypeName
076//                            + ", createdByEntityInstance = " + createdByEntityRef;
077
078//                    var eventValue = com.echothree.model.avro.core.common.Event.newBuilder()
079//                            .setEventId(eventId)
080//                            .setEventTime(eventTime)
081//                            .setEventTimeSequence(eventTimeSequence)
082//                            .setEntityRef(entityRef)
083//                            .setId(id)
084//                            .setEventTypeName(eventTypeName)
085//                            .setRelatedEntityRef(relatedEntityRef)
086//                            .setRelatedEventTypeName(relatedEventTypeName)
087//                            .setCreatedByEntityRef(createdByEntityRef)
088//                            .build();
089
090                    var eventJsonObject = new com.echothree.model.control.core.server.kafka.Event(eventId, eventTime,
091                            eventTimeSequence, entityRef, id, eventTypeName, relatedEntityRef, relatedEventTypeName,
092                            createdByEntityRef);
093                    var eventJson = gson.toJson(eventJsonObject);
094
095                    var future = kafkaConnection.send(new ProducerRecord<>(TOPIC, null,
096                            eventTime, entityRef, eventJson, HEADERS_JSON));
097
098                    future.get();
099                }
100            } catch(Exception e) {
101                throw new RuntimeException(e);
102            }
103        }
104    }
105
106}