Developing Apama Applications > Developing Apama Applications in Event Modeler > Using Standard Blocks > The Timer blocks > Schedule v3.0
Schedule v3.0
The Schedule block sends an output feed at a given time in the future. The time is specified by any combination of weekday, month, year, hour, minute and seconds. Any of the parameters may take a negative value, which means any value is allowed. Multiple timers may be started in a single block, each one having a different timer id. This timer id is supplied in the output feed when the timer fires, so may be used to determine what to do upon the timer firing.
Parameters
Parameter
Description
timer id
A string that distinguishes this timer from other timers in this block. An empty string is valid.
month
The month of the year (1-12) or negative for any month of the year.
day
The day of the month (1-31) or negative for any day of the month.
hour
The hour of the day (0-23) or negative for any hour of the day.
minute
The minutes past the hour (0-59) or negative for any minute.
second
The seconds past the minute (0-59) or negative for any second.
Operations
Operation
Description
start
Starts the specified timer id.
cancel
Cancels the specified timer id.
retrieve
Retrieve the details of the specified timer id by setting the output feed accordingly.
Input feeds
This block has no input feeds.
Output feeds
Feed
Fields
Description
timer
timer id
A string that distinguishes this timer from other timers in this block. An empty string is valid.
month
The month (1-12).
day
The day of month (1-31).
hour
The hour (0-23).
minute
The minute (0-59).
seconds
The seconds (0-59).
time up
true if time is up, false otherwise (i.e. on retrieval).
book
num timers
The number of currently active timers known to this block.
Examples
The following tables list the values for parameters that will trigger at the times described.
Example 1:
Parameter
Value
When triggered
month
-1
Once a month, on the first of every month, at 03:00:00.
day
1
hour
3
minute
0
seconds
0
Example 2:
Parameter
Value
When triggered
month
-1
Every hour, at 15 minutes past the hour.
day
-1
hour
-1
minute
15
seconds
0
Note that the time and date information is simply a copy of the parameters used when starting the timer. Any field whose corresponding parameter was given a negative value will have that same value.
Example 3:
Parameter
Value
When triggered
month
-1
Every second.
day
-1
hour
-1
minute
-1
seconds
-1
Example 4:
Parameter
Value
When triggered
month
-1
Every day at noon
day
-1
hour
12
minute
0
seconds
0
Example 5:
Parameter
Value
When triggered
month
5
Once a year, at exactly 16:31:28 on 31st May
day
31
hour
16
minute
31
seconds
28
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