I am new to design pattern. i have a list for task to be completed in java.right now its all in 1 java file as we had time constraints while developing. now i want to refactor it. consider str is input to task1 , task2 and for task 3 i have to input str as well as output from task2, etc. later point of time we want to create kind od pipeline for these task, in the sense, for pipeline1 i might need task1, task4... and pipeline 2 - task2, task3,etc. how do i achieve this? or is there any tool to do this? how ETL tools fall into this problem?
Please help.
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