Creating an Operator
This lesson demonstrates how to create an operator, import it using a plugin, and then execute it in a DAG file.
Operators represent a task or the actual work performed at each node of a DAG. Airflow can run any kind of workload as long as there’s an operator that encapsulates the logic to perform that workload. Previously, we introduced the BashOperator
that executed bash commands. Now we’ll create our own operator as an example, which we’ll call the HelloWorldOperator
. It simply prints a message on the console with the argument passed into it.
Remember that all operators are derived from the BaseOperator
base class. The code for our HelloWorldOperator
appears below. The primary logic of our operator is captured in the execute
method, which must be defined in an operator. Remember that since the execute
method can retry many times, it must be idempotent.
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