Overview of rolling policies

RollingPolicy is responsible for the rollover procedure which involves file moving and renaming.

The RollingPolicy interface is presented below:

package ch.qos.logback.core.rolling;  

import ch.qos.logback.core.FileAppender;
import ch.qos.logback.core.spi.LifeCycle;

public interface RollingPolicy extends LifeCycle {

  public void rollover() throws RolloverFailure;
  public String getActiveFileName();
  public CompressionMode getCompressionMode();
  public void setParent(FileAppender appender);
}

The rollover method accomplishes the work involved in archiving the current log file. The getActiveFileName() method is called to compute the file name of the current log file (where live logs are written to). As indicated by getCompressionMode method a RollingPolicy is also responsible for determining the compression mode. Lastly, a RollingPolicy is given a reference to its parent via the setParent method.