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fixed cron example (SPR-6772)

This commit is contained in:
Juergen Hoeller 2010-01-31 14:17:44 +00:00
parent 6070a498fe
commit 9c44f9252d
1 changed files with 12 additions and 11 deletions
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23
org.springframework.context/src/main/java/org/springframework/scheduling/support/CronSequenceGenerator.java
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@ -1,5 +1,5 @@
/* /*
* Copyright 2002-2009 the original author or authors. * Copyright 2002-2010 the original author or authors.
* *
* Licensed under the Apache License, Version 2.0 (the "License"); * Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. * you may not use this file except in compliance with the License.
@ -28,20 +28,19 @@ import java.util.TimeZone;
import org.springframework.util.StringUtils; import org.springframework.util.StringUtils;
/** /**
* Date sequence generator for a <a * Date sequence generator for a <a href="http://www.manpagez.com/man/5/crontab/">Crontab pattern</a>,
* href="http://www.manpagez.com/man/5/crontab/">Crontab pattern</a> allowing * allowing clients to specify a pattern that the sequence matches.
* client to specify a pattern that the sequence matches. The pattern is a list
* of 6 single space separated fields representing (second, minute, hour, day,
* month, weekday). Month and weekday names can be given as the first three
* letters of the English names.<br/>
* <br/>
* *
* Example patterns * <p>The pattern is a list of six single space-separated fields: representing
* second, minute, hour, day, month, weekday. Month and weekday names can be
* given as the first three letters of the English names.
*
* <p>Example patterns:
* <ul> * <ul>
* <li>"0 0 * * * *" = the top of every hour of every day.</li> * <li>"0 0 * * * *" = the top of every hour of every day.</li>
* <li>"*&#47;10 * * * * *" = every ten seconds.</li> * <li>"*&#47;10 * * * * *" = every ten seconds.</li>
* <li>"0 0 8-10 * * *" = 8, 9 and 10 o'clock of every day.</li> * <li>"0 0 8-10 * * *" = 8, 9 and 10 o'clock of every day.</li>
* <li>"0 0 8-10/30 * * *" = 8:00, 8:30, 9:00, 9:30 and 10 o'clock every day.</li> * <li>"0 0/30 8-10 * * *" = 8:00, 8:30, 9:00, 9:30 and 10 o'clock every day.</li>
* <li>"0 0 9-17 * * MON-FRI" = on the hour nine-to-five weekdays</li> * <li>"0 0 9-17 * * MON-FRI" = on the hour nine-to-five weekdays</li>
* <li>"0 0 0 25 12 ?" = every Christmas Day at midnight</li> * <li>"0 0 0 25 12 ?" = every Christmas Day at midnight</li>
* </ul> * </ul>
@ -69,6 +68,7 @@ class CronSequenceGenerator {
private final TimeZone timeZone; private final TimeZone timeZone;
/** /**
* Construct a {@link CronSequenceGenerator} from the pattern provided. * Construct a {@link CronSequenceGenerator} from the pattern provided.
* @param expression a space-separated list of time fields * @param expression a space-separated list of time fields
@ -81,6 +81,7 @@ class CronSequenceGenerator {
parse(expression); parse(expression);
} }
/** /**
* Get the next {@link Date} in the sequence matching the Cron pattern and * Get the next {@link Date} in the sequence matching the Cron pattern and
* after the value provided. The return value will have a whole number of * after the value provided. The return value will have a whole number of
@ -127,7 +128,7 @@ class CronSequenceGenerator {
List<Integer> resets = new ArrayList<Integer>(); List<Integer> resets = new ArrayList<Integer>();
int second = calendar.get(Calendar.SECOND); int second = calendar.get(Calendar.SECOND);
List<Integer> emptyList = Collections.<Integer> emptyList(); List<Integer> emptyList = Collections.emptyList();
int updateSecond = findNext(this.seconds, second, calendar, Calendar.SECOND, Calendar.MINUTE, emptyList); int updateSecond = findNext(this.seconds, second, calendar, Calendar.SECOND, Calendar.MINUTE, emptyList);
if (second == updateSecond) { if (second == updateSecond) {
resets.add(Calendar.SECOND); resets.add(Calendar.SECOND);