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17 package org.apache.commons.scxml.invoke;
18
19 import org.apache.commons.logging.Log;
20 import org.apache.commons.logging.LogFactory;
21 import org.apache.commons.scxml.SCXMLExecutor;
22 import org.apache.commons.scxml.TriggerEvent;
23 import org.apache.commons.scxml.model.ModelException;
24
25 /***
26 * Trigger the given {@link TriggerEvent} (or array of) on the given
27 * state machine executor asynchronously, once.
28 */
29 class AsyncTrigger implements Runnable {
30
31 /*** The state machine executor. */
32 private SCXMLExecutor executor;
33 /*** The event(s) to be triggered. */
34 private TriggerEvent[] events;
35 /*** The log. */
36 private Log log = LogFactory.getLog(AsyncTrigger.class);
37
38 /***
39 * Constructor.
40 *
41 * @param executor The {@link SCXMLExecutor} to trigger the event on.
42 * @param event The {@link TriggerEvent}.
43 */
44 AsyncTrigger(final SCXMLExecutor executor, final TriggerEvent event) {
45 this.executor = executor;
46 this.events = new TriggerEvent[1];
47 this.events[0] = event;
48 new Thread(this).start();
49 }
50
51 /***
52 * Fire the event(s).
53 */
54 public void run() {
55 try {
56 synchronized (executor) {
57 executor.triggerEvents(events);
58 }
59 } catch (ModelException me) {
60 log.error(me.getMessage(), me);
61 }
62 }
63
64 }
65