To perform stream data processing on data files, such as log files, you use the file input connector as the input callback.
The file input connector extracts records to be processed from an input source file. Because these records are retrieved as input records, the format conversion callback must be used to convert them to common records so that the stream data processing engine can process them. The following figure shows the positioning and processing of the callbacks involved in file input.
Figure 3-5 Positioning and processing of the callbacks involved in file input