1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.scxml2.invoke;
18
19 import org.apache.commons.scxml2.SCXMLIOProcessor;
20 import org.apache.commons.scxml2.TriggerEvent;
21
22 /**
23 * Trigger the given {@link TriggerEvent} on the given
24 * state machine executor asynchronously, once.
25 */
26 class AsyncTrigger implements Runnable {
27
28 /** The SCXML state machine I/O Processor to deliver the event to. */
29 private final SCXMLIOProcessor ioProcessor;
30 /** The event to be triggered. */
31 private final TriggerEvent event;
32
33 /**
34 * Constructor.
35 *
36 * @param ioProcessor The {@link org.apache.commons.scxml2.SCXMLIOProcessor} to trigger the event on.
37 * @param event The {@link TriggerEvent}.
38 */
39 AsyncTrigger(final SCXMLIOProcessor ioProcessor, final TriggerEvent event) {
40 this.ioProcessor = ioProcessor;
41 this.event = event;
42 }
43
44 /**
45 * Fire the trigger asynchronously.
46 */
47 public void start() {
48 new Thread(this).start();
49 }
50
51 /**
52 * Fire the event(s).
53 */
54 public void run() {
55 ioProcessor.addEvent(event);
56 }
57
58 }
59