src/main/java/org/apache/commons/scxml2/invoke/AsyncTrigger.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.commons.scxml2.invoke;

import org.apache.commons.scxml2.SCXMLIOProcessor;
import org.apache.commons.scxml2.TriggerEvent;

/**
 * Trigger the given {@link TriggerEvent} on the given
 * state machine executor asynchronously, once.
 */
class AsyncTrigger implements Runnable {

    /** The SCXML state machine I/O Processor to deliver the event to. */
    private final SCXMLIOProcessor ioProcessor;
    /** The event to be triggered. */
    private final TriggerEvent event;

    /**
     * Constructor.
     *
     * @param ioProcessor The {@link org.apache.commons.scxml2.SCXMLIOProcessor} to trigger the event on.
     * @param event The {@link TriggerEvent}.
     */
    AsyncTrigger(final SCXMLIOProcessor ioProcessor, final TriggerEvent event) {
        this.ioProcessor = ioProcessor;
        this.event = event;
    }

    /**
     * Fire the trigger asynchronously.
     */
    public void start() {
        new Thread(this).start();
    }

    /**
     * Fire the event(s).
     */
    public void run() {
        ioProcessor.addEvent(event);
    }

}