http://www.h2database.com: H2 Database Engine
  • Thomas Mueller 
/*
 * Copyright 2004-2019 H2 Group. Multiple-Licensed under the MPL 2.0,
 * and the EPL 1.0 (http://h2database.com/html/license.html).
 * Initial Developer: H2 Group
 */
package org.h2.util;

import org.h2.message.Trace;


The cache writer is called by the cache to persist changed data that needs to
be removed from the cache.

/**
 * The cache writer is called by the cache to persist changed data that needs to
 * be removed from the cache.
 */
public interface CacheWriter {

    
Persist a record.

Params:
  • entry – the cache entry
/**
     * Persist a record.
     *
     * @param entry the cache entry
     */
    void writeBack(CacheObject entry);

    
Flush the transaction log, so that entries can be removed from the cache.
This is only required if the cache is full and contains data that is not
yet written to the log. It is required to write the log entries to the
log first, because the log is 'write ahead'.

/**
     * Flush the transaction log, so that entries can be removed from the cache.
     * This is only required if the cache is full and contains data that is not
     * yet written to the log. It is required to write the log entries to the
     * log first, because the log is 'write ahead'.
     */
    void flushLog();

    
Get the trace writer.

Returns:the trace writer
/**
     * Get the trace writer.
     *
     * @return the trace writer
     */
    Trace getTrace();

}