ProgressListener (Apache Tomcat 11.0.22 API Documentation)
Description: declaration: package: org.apache.tomcat.util.http.fileupload, interface: ProgressListener

# Interface ProgressListener

public interface ProgressListener
The `ProgressListener` may be used to display a progress bar or do stuff like that.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `update(long bytesRead, long contentLength, int items)`
  Updates the listeners status information.

- ## Method Details

  - ### update

    void update(long bytesRead, long contentLength, int items)
    Updates the listeners status information.
    Parameters:
      `bytesRead` - The total number of bytes, which have been read so far.
      `contentLength` - The total number of bytes, which are being read. May be -1, if this number is unknown.
      `items` - The number of the field, which is currently being read. (0 = no item so far, 1 = first item is being read, ...)