Day-to-Day HR Duties & Tasks. Human resources professionals play a key role in any organization, where they maintain and manage every aspect of the business as it relates to employees and working conditions. Duties differ from one company to another, but - large or small - each duty and task is essential.
- I'm new to.Net 4.0's Tasks and I wasn't able to find what I thought would be a Task based replacement or implementation of a Timer, e.g. A periodic Task.
- An ‘Edit Trigger’ screen will appear. To set the script to run hourly, we select the ‘Repeat task’ option and enable it. We select the ‘1 hour’ option, indicating that we wish for the task to execute on an hourly basis, and select the duration as indefinite under the duration option. The set options are shown in screenshot below.
- (1/2) 3 = 0.125 (the amount remaining after 3 half-lives) 10.0 g x 0.125 = 1.25 g remain 10.0 g − 1.25 g = 8.75 g have decayed Note that the length of the half-life played no role in this calculation. In addition, note that the question asked for the amount that decayed, not the amount that remaning.
Schedule a timer for automatic creation with a timeout schedule based on a cron-like time expression. The annotated method is used as the timeout callback method.
All elements of this annotation are optional. If none are specified a persistent timer will be created with callbacks occuring every day at midnight in the default time zone associated with the container in which the application is executing.
There are seven elements that constitute a schedule specification which are listed below. In addition, the
timezone
element may be used to specify a non-default time zone in whose context the schedule specification is to be evaluated; the persistent
element may be used to specify a non-persistent timer, and the info
element may be used to specify additional information that may be retrieved when the timer callback occurs. The elements that specify the calendar-based schedule itself are as follows:
![Timer Timer](https://is5-ssl.mzstatic.com/image/thumb/Purple118/v4/76/b5/e9/76b5e959-b58f-d049-e88a-20cfac0f9c9e/pr_source.png/1280x0w.png)
- second : one or more seconds within a minute Allowable values: [0,59]
- minute : one or more minutes within an hour Allowable values : [0,59]
- hour : one or more hours within a day Allowable values : [0,23]
- dayOfMonth : one or more days within a month Allowable values:
- [1,31]
- [-7, -1]
- 'Last'
- {'1st', '2nd', '3rd', '4th', '5th', 'Last'} {'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'}
'Last' means the last day of the month-x (where x is in the range [-7, -1]) means x day(s) before the last day of the month'1st','2nd', etc. applied to a day of the week identifies a single occurrence of that day within the month. - month : one or more months within a year Allowable values :
- [1,12]
- {'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', Dec'}
- dayOfWeek : one or more days within a week Allowable values :
- [0,7]
- {'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'}
'0' and '7' both refer to Sunday - year : a particular calendar year Allowable values : a four-digit calendar year
Each element supports values expressed in one of the following forms
- Single Value. This constrains the attribute to only one of its possible values.
- Wild Card. '*' represents all allowable values for a given attribute.
- List. This constrains the attribute to two or more allowable values or ranges, with a comma used as a separator character within the string. Each item in the list must be a single value or range. List items cannot be lists, wild cards, or increments. Duplicate values are ignored.
- Range. This constrains the attribute to an inclusive range of values, with a dash separating both ends of the range. Each side of the range must be a single attribute value. Members of a range cannot be lists, wild cards, ranges, or increments. If
x
is larger thany
in a range'x-y'
, the range is equivalent to'x-max, min-y'
, wheremax
is the largest value of the corresponding attribute andmin
is the smallest. The range'x-x'
, where both range values are the same, evaluates to the single valuex
. The day of the week range'0-7'
is equivalent to'*'
. - Increments. The forward slash constrains an attribute based on a starting point and an interval, and is used to specify every
N
seconds, minutes, or hours within the minute, hour, or day, respectively. For the expressionx/y
, the attribute is constrained to everyy
th value within the set of allowable values beginning at timex
. Thex
value is inclusive. The wild card character (*
) can be used in thex
position, and is equivalent to0
. The use of increments is only supported within thesecond
,minute
, andhour
elements. For thesecond
andminute
elements,x
andy
must each be in the range[0,59]
. For thehour
element,x
andy
must each be in the range[0,23]
.This is equivalent to:minute = '0,5,10,15,20,25,30,35,40,45,50,55'
This is equivalent to:second = '30,40,50'
Note that the set of matching increment values stops once the maximum value for that attribute is exceeded. It does not 'roll over' past the boundary.This is equivalent to:(minute = '0,14,28,42,56', hour = '1,2')
(Every 14 minutes within the hour, for the hours of 1 and 2 a.m.) Anymp4 data recovery 1 1 64.
The following additional rules apply to the schedule specification elements:
- If the
dayOfMonth
element has a non-wildcard value and thedayOfWeek
element has a non-wildcard value, then any day matching either thedayOfMonth
value or thedayOfWeek
value will be considered to apply. - Whitespace is ignored, except for string constants and numeric values.
- All string constants (e.g.,
'Sun'
,'Jan'
,'1st'
, etc.) are case insensitive.
Schedule-based timer times are evaluated in the context of the default time zone associated with the container in which the application is executing. A schedule-based timer may optionally override this default and associate itself with a specific time zone. If the schedule-based timer is associated with a specific time zone, all its times are evaluated in the context of that time zone, regardless of the default time zone in which the container is executing.
The timeout callback method to which the
Schedule
annotation is applied must have one of the following signatures, where <METHOD>
designates the method name: A timeout callback method can have public, private, protected, or package level access. A timeout callback method must not be declared as final or static. Timeout callback methods must not throw application exceptions.
- Since:
- EJB 3.1
Optional Element Summary | |
---|---|
java.lang.String | dayOfMonth Specifies one or more days within a month. |
java.lang.String | dayOfWeek Specifies one or more days within a week. |
java.lang.String | hour Specifies one or more hours within a day. |
java.lang.String | info Specifies an information string that is associated with the timer |
java.lang.String | minute Specifies one or more minutes with an hour. |
java.lang.String | month Specifies one or more months within a year. |
boolean | persistent Specifies whether the timer that is created is persistent. |
java.lang.String | second Specifies one or more seconds with in a minute. |
java.lang.String | timezone Specifies the time zone within which the schedule is evaluated. |
java.lang.String | year Specifies one or more years. |
second
![Hr task timer 1 4 09 Hr task timer 1 4 09](https://images-na.ssl-images-amazon.com/images/I/71YWcyOxUjL._AC_SX522_.jpg)
Hr Task Timer 1 4 00
- Specifies one or more seconds with in a minute.
- Default:
- '0'
minute
- Specifies one or more minutes with an hour.
- Default:
- '0'
hour
- Specifies one or more hours within a day.
- Default:
- '0'
dayOfMonth
- Specifies one or more days within a month.
- Default:
- '*'
month
- Specifies one or more months within a year.
- Default:
- '*'
dayOfWeek
- Specifies one or more days within a week.
- Default:
- '*'
year
- Specifies one or more years.
- Default:
- '*'
timezone
Specifies the time zone within which the schedule is evaluated. Time zones are specified as an ID string. The set of required time zone IDs is defined by the Zone Name(TZ) column of the public domain zoneinfo database. If a timezone is not specified, the schedule is evaluated in the context of the default timezone associated with the contianer in which the application is executing.
- Default:
- '
Hr Task Timer 1 4 09
info
- Specifies an information string that is associated with the timer
- Default:
- '
persistent
- Specifies whether the timer that is created is persistent.
- Default:
- true
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Hr Task Timer 1 4 01
Generated on 10-February-2011 12:41
Hr Task Timer 1 4 07
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