I have encountered a use case, in which I do not have any input rows and need to

• read the value of a context variable

• then apply some Java code to that value

• and produce output to tMap component.

I have followed the following steps to do so.

1. Create a new Job in Talend and add a tJavaFlex component to it.

2. In the tJavaFlex component, use the context.your_variable_name to load the context variable.

3. Write your Java code in the 'Main Code' section of the tJavaFlex component.

4. Use the globalMap.put("output_variable_name",your_value) method to store the output data in the globalMap.

5. Connect the tJavaFlex component to the tMap component using a Row > Main connection.

6. In tMap component, use the ((String)globalMap.get("output_variable_name")) to get the data from the globalMap

7. Run the job and check the results.

Note: Make sure that your context variable is defined and has a value before running the job.

Happy Learning !