Creating the Job and defining context variables
Before you begin
Create two tables named db_testing and db_production respectively in a MySQL database named db_connections, to hold the connection parameters for accessing the above mentioned databases, testing and production. Each table should contain only two columns: key and value, both of type VARCHAR. Below is an example of the content of the database tables:
db_testing:
| key | value |
|---|---|
| host | localhost |
| port | 3306 |
| username | root |
| password | talend |
| database | testing |
db_production:
| key | value |
|---|---|
| host | localhost |
| port | 3306 |
| username | root |
| password | talend |
| database | production |
You can create these database tables using another Talend Job that contains tFixedFlowInput and tMysqlOutput components.
Procedure
-
Create a Job and add a tMysqlInput component and a
tLogRow component onto the design workspace, and link them using
a connection.
-
Select the Context view of the Job, and
click the [+] button at the bottom of the view to add
five rows in the table to define the following variables, all of type String, without defining their values, which will be loaded
dynamically at Job execution: host, port,
username, password, and
database.
-
Click in the Value field of the newly
created variable and click the button that appears to open the Configure
Values dialog box, and click New... to
open the New Value dialog box. Enter the name of one of the database
tables holding the database connection details and click OK.
-
Select the Prompt check box next to the
Value field of the
db_connection variable to show the Prompt fields and enter the prompt message to be displayed at the execution
time.
