Java Reference
In-Depth Information
Executing an Activity at a Specific Point in Time
Problem
You want your business process to wait until a specific point in time before it executes the
next block of code, such as an
invoke
activity.
Solution
Use the
<wait until="...">
activity to make the process wait until a specific deadline is
reached. Supply a value to the
until
attribute using the XPath expression syntax for a dead-
line.
Discussion
The complete expression syntax for deadlines is shown in
Table 10-1
.
Table10-1.XPath deadline expression values
Value
Meaning
T
Time designator, indicating that the following values represent the time of day.
C
Centuries.
Y
Years.
M
Months.
D
Days.
h
Hours.
m
Minutes.
s
Seconds. You can use
ss.sss
to represent greater precision with milliseconds.
Z
UTC time (Coordinated Universal Time). This element should immediately follow the time of day
element (
T
).
There are a few ways to represent deadlines with more or less precision, as shown in the fol-
lowing example.
This timer will expire on New Year's Eve, 2010, a second before midnight:
<wait until="2010-12-31T23:59:59+01:100"/>
