001// --------------------------------------------------------------------------------
002// Copyright 2002-2025 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.Arrays;
028import java.util.Collections;
029import java.util.HashSet;
030import java.util.Set;
031import javax.enterprise.context.RequestScoped;
032
033@RequestScoped
034public class ProcessQueuedEventsCommand
035        extends BaseSimpleCommand {
036
037    private final static CommandSecurityDefinition COMMAND_SECURITY_DEFINITION;
038    
039    static {
040        COMMAND_SECURITY_DEFINITION = new CommandSecurityDefinition(Collections.unmodifiableList(Arrays.asList(
041                new PartyTypeDefinition(PartyTypes.UTILITY.name(), null)
042                )));
043    }
044    
045    /** Creates a new instance of ProcessQueuedEventsCommand */
046    public ProcessQueuedEventsCommand() {
047        super(COMMAND_SECURITY_DEFINITION, false);
048    }
049
050    @Override
051    protected BaseResult execute() {
052        var eventControl = Session.getModelController(EventControl.class);
053        var remainingTime = 2L * 60 * 1000; // 2 minutes
054        var queuedEvents = eventControl.getQueuedEventsForUpdate();
055
056        for(var queuedEvent : queuedEvents) {
057            var startTime = System.currentTimeMillis();
058            Set<EventSubscriber> eventSubscribers = new HashSet<>();
059            var event = queuedEvent.getEvent();
060
061            if(event != null) {
062                // TODO: this should not be necessary, bug 444
063                var eventType = event.getEventType();
064                var entityInstance = event.getEntityInstance();
065                var entityType = entityInstance.getEntityType();
066                var eventSubscriberEventTypes = eventControl.getEventSubscriberEventTypes(eventType);
067                var eventSubscriberEntityTypes = eventControl.getEventSubscriberEntityTypes(entityType, eventType);
068                var eventSubscriberEntityInstances = eventControl.getEventSubscriberEntityInstances(entityInstance, eventType);
069
070                eventSubscriberEventTypes.stream().map((eventSubscriberEventType) -> eventSubscriberEventType.getEventSubscriber()).filter((eventSubscriber) -> !eventSubscribers.contains(eventSubscriber)).map((eventSubscriber) -> {
071                    eventControl.createQueuedSubscriberEvent(eventSubscriber, event);
072                    return eventSubscriber;
073                }).forEach((eventSubscriber) -> {
074                    eventSubscribers.add(eventSubscriber);
075                });
076
077                eventSubscriberEntityTypes.stream().map((eventSubscriberEntityType) -> eventSubscriberEntityType.getEventSubscriber()).filter((eventSubscriber) -> !eventSubscribers.contains(eventSubscriber)).map((eventSubscriber) -> {
078                    eventControl.createQueuedSubscriberEvent(eventSubscriber, event);
079                    return eventSubscriber;
080                }).forEach((eventSubscriber) -> {
081                    eventSubscribers.add(eventSubscriber);
082                });
083                
084                eventSubscriberEntityInstances.stream().map((eventSubscriberEntityInstance) -> eventSubscriberEntityInstance.getEventSubscriber()).filter((eventSubscriber) -> !eventSubscribers.contains(eventSubscriber)).map((eventSubscriber) -> {
085                    eventControl.createQueuedSubscriberEvent(eventSubscriber, event);
086                    return eventSubscriber;
087                }).forEach((eventSubscriber) -> {
088                    eventSubscribers.add(eventSubscriber);
089                });
090
091                eventControl.removeQueuedEvent(queuedEvent);
092
093                remainingTime -= System.currentTimeMillis() - startTime;
094                if(remainingTime < 0) {
095                    break;
096                }
097            }
098        }
099
100        return null;
101    }
102}