protected Trigger parseTriggerConfig(String configValue) throws BadTriggerConfigException {
BadTriggerConfigException badPeriodicTiggerException = null;
BadTriggerConfigException badCronTiggerException = null;
try {
return tryExpressionAsPeriodicTrigger(configValue);
} catch (BadTriggerConfigException e) {
badPeriodicTiggerException = e;
}
try {
return tryExpressionAsCronTrigger(configValue);
} catch (BadTriggerConfigException e) {
badCronTiggerException = e;
}
throw new BadTriggerConfigException(
"All trigger config parsing attempts failed. First reason: ["
+ badPeriodicTiggerException.getMessage()
+ "]. Second reason: ["
+ badCronTiggerException.getMessage()
+ "]",
configValue);
}
protected Trigger tryExpressionAsPeriodicTrigger(String configValue)
throws BadTriggerConfigException {
BadTriggerConfigException longParseException = null;
try {
final long period = Long.parseLong(configValue);
if (period < 0) {
return new DisabledTrigger();
}
// millis since that's what @Scheduled methods were historically
// configured in
return new PeriodicTrigger(period, TimeUnit.MILLISECONDS);
} catch (NumberFormatException e) {
longParseException =
new BadTriggerConfigException(
"Config [" + configValue + "] did not parse to a long.", configValue, e);
} catch (IllegalArgumentException e) {
longParseException =
new BadTriggerConfigException(
"Config [" + configValue + "] could not be used to initialize a PeriodicTrigger",
configValue,
e);
}
final Matcher matcher = PERIODIC_TRIGGER_WITH_INITIAL_DELAY_PATTERN.matcher(configValue);
if (!(matcher.matches())) {
throw new BadTriggerConfigException(
"Trigger expression could not be parsed as either a"
+ " simple period or as a period with an initial "
+ "offset. Original parse failure: ["
+ longParseException.getMessage()
+ "]. To be considered a period with an offset, "
+ "the expression must match this regexp"
+ "(without brackets): ["
+ PERIODIC_TRIGGER_WITH_INITIAL_DELAY_PATTERN
+ "]",
configValue);
}
try {
final String periodStr = matcher.group(1);
final long periodLong = Long.parseLong(periodStr);
if (periodLong < 0) {
return new DisabledTrigger();
}
final String offsetStr = matcher.group(2);
final long offsetLong = Long.parseLong(offsetStr);
final PeriodicTrigger trigger = new PeriodicTrigger(periodLong, TimeUnit.MILLISECONDS);
trigger.setInitialDelay(offsetLong);
return trigger;
} catch (NumberFormatException e) {
throw new BadTriggerConfigException(
"Trigger expression could not be parsed as either a"
+ " simple period or as a period with an initial "
+ "offset. Original parse failure: ["
+ longParseException.getMessage()
+ "]. To be considered a period with an initial "
+ "delay, the expression must match this regexp"
+ "(without brackets): ["
+ PERIODIC_TRIGGER_WITH_INITIAL_DELAY_PATTERN
+ "]",
configValue,
e);
} catch (IllegalArgumentException e) {
throw new BadTriggerConfigException(
"Trigger expression parsed as a period [{}] with an "
+ "initial delay [{}] but could not be used to "
+ "initialize a PeriodicTrigger",
configValue,
e);
}
}
