He said cycle, certainly no stranger to the small partners, is to repeat do one thing; and the kettle is in general circulation occurs in the job, because the job is executed in serial;
kettle cycle, there are two, one is through the js script, the other is returned by traversing each row in the previous step.
Here is what I wrote pseudo-code, I will use the Kettle to implement this code:
array = ['sys1','sys2','sys3','sys4'] variable in Array for: |
Code loop variable is variable, with a complete traversal for an array, then the end of the cycle.
Loop in a set determination condition, a branch which determines the array elements belong.
If all the judgment conditions are not met, then print "is not called"
1. Kettle job description
schedule_job.kjb: loop variables related to the operating cycle and the body, also called inlet, to be understood that main
get_data_from_datagrid.ktr: generating an array, i.e. cycling conditions.
cycle_body_job.kjb: cycling, arrays, there are few data, the loop is executed several times.
FIG 2 is a configuration schedule_job lower, its role is to connect the loop condition and the loop, so the two additional job steps comprising
Next, I will start each step in the setting method, and finally how schedule_job is set;
If you expand that file, write the file name directly, if you expand that step, then put the file name - step name.
For example, expanded file get_data_from_datagrid.ktr
Expand step get_data_from_datagrid-Data Grid
3. get_data_from_datagrid.ktr 展开
Only two steps, is a data grid, used to generate the array, a further step is Copy rows to result, is used to copy the data to return results may be returned to the caller. The caller is outside schedule_job.ktr.
4. get_data_from_datagrid-Data Grid 展开
Fill in the fields of information in the Meta tab, type the field name is a string SYSTEMNAME
In the Value Data tab of fill in the fields, just like the process to fill in the data as excel.
5. cycle_body_job.kjb Expand
Double-click the blank space, open the "Parameters" tab, enter the variable name SYSTEMNAME inside. This variable with the previous steps field names the same.
6. cycle_body_job-is_sys1 expansion
Other conditions are similar judgment, not start one by one.
7. schedule_job setting method
勾选“Execute every input row”
