Logback: the reliable, generic, fast and flexible logging framework.
Copyright (C) 1999-2015, QOS.ch. All rights reserved.
This program and the accompanying materials are dual-licensed under
either the terms of the Eclipse Public License v1.0 as published by
the Eclipse Foundation
  or (per the licensee's choosing)
under the terms of the GNU Lesser General Public License version 2.1
as published by the Free Software Foundation.
/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package ch.qos.logback.core.rolling;

import ch.qos.logback.core.FileAppender;
import ch.qos.logback.core.rolling.helper.CompressionMode;
import ch.qos.logback.core.spi.LifeCycle;

A RollingPolicy is responsible for performing the rolling over
of the active log file. The RollingPolicy is also responsible
for providing the active log file, that is the live file where
logging output will be directed.
Author:
Ceki Gülcü/**
 * A <code>RollingPolicy</code> is responsible for performing the rolling over
 * of the active log file. The <code>RollingPolicy</code> is also responsible
 * for providing the <em>active log file</em>, that is the live file where
 * logging output will be directed.
 * 
 * @author Ceki G&uuml;lc&uuml;
 */
public interface RollingPolicy extends LifeCycle {

    
Rolls over log files according to implementation policy.
This method is invoked by RollingFileAppender, usually at the behest of its TriggeringPolicy. 
Throws:
RolloverFailure – 
                Thrown if the rollover operation fails for any reason./**
     * Rolls over log files according to implementation policy.
     * 
     * <p>This method is invoked by {@link RollingFileAppender}, usually at the
     * behest of its {@link TriggeringPolicy}.
     * 
     * @throws RolloverFailure
     *                 Thrown if the rollover operation fails for any reason.
     */
    void rollover() throws RolloverFailure;

    
Get the name of the active log file.
With implementations such as TimeBasedRollingPolicy, this method returns a new file name, where the actual output will be sent. 
On other implementations, this method might return the FileAppender's
file property.
/**
     * Get the name of the active log file.
     * 
     * <p>With implementations such as {@link TimeBasedRollingPolicy}, this
     * method returns a new file name, where the actual output will be sent.
     * 
     * <p>On other implementations, this method might return the FileAppender's
     * file property.
     */
    String getActiveFileName();

    
The compression mode for this policy.
Returns:
/**
     * The compression mode for this policy.
     * 
     * @return

     */
    CompressionMode getCompressionMode();

    
This method allows RollingPolicy implementations to be aware of their
containing appender.
Params:
appender – /**
     * This method allows RollingPolicy implementations to be aware of their
     * containing appender.
     * 
     * @param appender
     */

    void setParent(FileAppender<?> appender);
}