Input components are the components generally placed at the beginning of a Talend job. They are in charge of retrieving the data that will later be processed in the job.
An input component is primarily made of three distinct logics:
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The execution logic of the component itself, defined through a partition mapper.
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The configurable part of the component, defined through the mapper configuration.
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The source logic defined through a producer.
Before implementing the component logic and defining its layout and configurable fields, make sure you have specified its basic metadata, as detailed in this document.