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Airflow is a platform to programmaticaly author, schedule and monitor data pipelines. Use Airflow to author workflows as directed acyclic graphs (DAGs) of tasks. The Airflow scheduler executes your tasks on an array of workers while following the specified dependencies. Rich command lines utilities makes performing complex surgeries on DAGs a snap. Affiliate Future provides advertisers with an effective marketing solution through its affiliate network and tools. AF delivers millions of transactions per month to hundreds of advertisers from SME’s to major brands. In java, String concatenation is implemented through the StringBuilder (or StringBuffer) class and its append method. String concatenation operator produces a new string by appending the second operand onto the end of the first operand. The string concatenation operator can concat not only string but primitive values also. For Example: