File Listener
A file listener in Pega is a component used to monitor a specified directory for incoming files and process them automatically. Here’s a detailed breakdown of how it works and its configuration:
Overview
A file listener works in conjunction with a file service to import and process files from another system or those created by application users. It monitors a directory for files that match a specific pattern and processes them according to predefined rules.
Key Components and Workflow
Monitoring Directory: The file listener continuously monitors a specified directory for new files that match a defined pattern.
File Processing:
File Service: When a matching file is detected, the file listener moves it to a working directory and invokes a file service.
Parsing: The file service uses a parse rule to open and read the file, evaluate each input record, and divide the record into fields.
Clipboard: The parsed data is written to the clipboard, a temporary storage area in Pega.
Service Activity: A service activity processes the data, which can include creating work objects or updating records.
Post-Processing:
Completion: After processing, files are moved to a ‘completed’ directory if processed successfully.
Error Handling: If processing fails, the file can be retried a specified number of times. If retries are exhausted or recovery is disabled, the file is moved to a ‘work’ directory for further investigation.
Reporting: The file listener can generate reports on the processing results, which are stored in a ‘reports’ directory.
Configuration Steps
Creating a File Listener:
Define the directory to be monitored.
Specify the file pattern to match.
Configure the file service to be called for processing.
Configuring Processing:
Set the frequency for checking new files.
Decide whether to generate reports.
Define actions for post-processing (e.g., move to completed or work directory).
Error Handling:
Configure retry attempts for failed processing.
Set up logging and debugging options for troubleshooting.
Restarting Listeners:
Any changes to the file service rules require restarting the listener from Admin Studio for the changes to take effect.
Best Practices
Directory Management: Ensure the monitored directory is secure and accessible.
Error Handling: Enable recovery and set appropriate retry limits.
Logging: Use remote logging for detailed troubleshooting.
--TEAM ENIGMA
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