https://openjdk.java.net/ 
/*
 * Copyright (c) 2002-2012, the original author or authors.
 *
 * This software is distributable under the BSD license. See the terms of the
 * BSD license in the documentation provided with this software.
 *
 * http://www.opensource.org/licenses/bsd-license.php
 */
package jdk.internal.jline.console.history;

import java.io.IOException;


Persistent History. 
Author:Jason Dillon
Since:2.3
/**
 * Persistent {@link History}.
 *
 * @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
 * @since 2.3
 */
public interface PersistentHistory
    extends History
{
    
Flush all items to persistent storage.

Throws:
  • IOException –  Flush failed
/**
     * Flush all items to persistent storage.
     *
     * @throws IOException  Flush failed
     */
    void flush() throws IOException;

    
Purge persistent storage and History.clear. 
Throws:
/**
     * Purge persistent storage and {@link #clear}.
     *
     * @throws IOException  Purge failed
     */
    void purge() throws IOException;
}