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.control.user.core.server.command;
018
019import com.echothree.model.control.core.server.control.EventControl;
020import com.echothree.model.control.party.common.PartyTypes;
021import com.echothree.model.data.core.server.entity.EventSubscriber;
022import com.echothree.util.common.command.BaseResult;
023import com.echothree.util.server.control.BaseSimpleCommand;
024import com.echothree.util.server.control.CommandSecurityDefinition;
025import com.echothree.util.server.control.PartyTypeDefinition;
026import com.echothree.util.server.persistence.Session;
027import java.util.HashSet;
028import java.util.List;
029import java.util.Set;
030import javax.enterprise.context.Dependent;
031
032@Dependent
033public class ProcessQueuedEventsCommand
034        extends BaseSimpleCommand {
035
036    private final static CommandSecurityDefinition COMMAND_SECURITY_DEFINITION;
037    
038    static {
039        COMMAND_SECURITY_DEFINITION = new CommandSecurityDefinition(List.of(
040                new PartyTypeDefinition(PartyTypes.UTILITY.name(), null)
041        ));
042    }
043    
044    /** Creates a new instance of ProcessQueuedEventsCommand */
045    public ProcessQueuedEventsCommand() {
046        super(COMMAND_SECURITY_DEFINITION, false);
047    }
048
049    @Override
050    protected BaseResult execute() {
051        var eventControl = Session.getModelController(EventControl.class);
052        var remainingTime = 2L * 60 * 1000; // 2 minutes
053        var queuedEvents = eventControl.getQueuedEventsForUpdate();
054
055        for(var queuedEvent : queuedEvents) {
056            var startTime = System.currentTimeMillis();
057            Set<EventSubscriber> eventSubscribers = new HashSet<>();
058            var event = queuedEvent.getEvent();
059
060            if(event != null) {
061                // TODO: this should not be necessary, bug 444
062                var eventType = event.getEventType();
063                var entityInstance = event.getEntityInstance();
064                var entityType = entityInstance.getEntityType();
065                var eventSubscriberEventTypes = eventControl.getEventSubscriberEventTypes(eventType);
066                var eventSubscriberEntityTypes = eventControl.getEventSubscriberEntityTypes(entityType, eventType);
067                var eventSubscriberEntityInstances = eventControl.getEventSubscriberEntityInstances(entityInstance, eventType);
068
069                eventSubscriberEventTypes.stream().map((eventSubscriberEventType) -> eventSubscriberEventType.getEventSubscriber()).filter((eventSubscriber) -> !eventSubscribers.contains(eventSubscriber)).map((eventSubscriber) -> {
070                    eventControl.createQueuedSubscriberEvent(eventSubscriber, event);
071                    return eventSubscriber;
072                }).forEach((eventSubscriber) -> {
073                    eventSubscribers.add(eventSubscriber);
074                });
075
076                eventSubscriberEntityTypes.stream().map((eventSubscriberEntityType) -> eventSubscriberEntityType.getEventSubscriber()).filter((eventSubscriber) -> !eventSubscribers.contains(eventSubscriber)).map((eventSubscriber) -> {
077                    eventControl.createQueuedSubscriberEvent(eventSubscriber, event);
078                    return eventSubscriber;
079                }).forEach((eventSubscriber) -> {
080                    eventSubscribers.add(eventSubscriber);
081                });
082                
083                eventSubscriberEntityInstances.stream().map((eventSubscriberEntityInstance) -> eventSubscriberEntityInstance.getEventSubscriber()).filter((eventSubscriber) -> !eventSubscribers.contains(eventSubscriber)).map((eventSubscriber) -> {
084                    eventControl.createQueuedSubscriberEvent(eventSubscriber, event);
085                    return eventSubscriber;
086                }).forEach((eventSubscriber) -> {
087                    eventSubscribers.add(eventSubscriber);
088                });
089
090                eventControl.removeQueuedEvent(queuedEvent);
091
092                remainingTime -= System.currentTimeMillis() - startTime;
093                if(remainingTime < 0) {
094                    break;
095                }
096            }
097        }
098
099        return null;
100    }
101}