/*
 * Copyright 2022 Red Hat, Inc. and/or its affiliates.
 *
 * 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.kie.kogito.dmn.quarkus.example.dtlistener;

import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;

import javax.enterprise.context.ApplicationScoped;

import org.kie.dmn.api.core.event.AfterEvaluateDecisionTableEvent;
import org.kie.dmn.core.api.event.DefaultDMNRuntimeEventListener;

/**
 * This class demonstrates one possible use of the `AfterEvaluateDecisionTableEvent` asynchronously to the listener.
 */
@ApplicationScoped
public class ExampleDMNRuntimeEventListener extends DefaultDMNRuntimeEventListener {
    // using a ConcurrentLinkedQueue to avoid ConcurrentModificationException
    private Queue<AfterEvaluateDecisionTableEvent> events = new ConcurrentLinkedQueue<>();

    @Override
    public void afterEvaluateDecisionTable(AfterEvaluateDecisionTableEvent event) {
        // Maintaining listener callback code as small as possible.
        events.add(event);
    }

    public Queue<AfterEvaluateDecisionTableEvent> getEvents() {
        return events;
    }
}
