?? cachewriter.java
字號:
/*
* Copyright 2004-2008 H2 Group. Licensed under the H2 License, Version 1.0
* (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.util;
import java.sql.SQLException;
/**
* 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.
*
* @param entry the cache entry
*/
void writeBack(CacheObject entry) throws SQLException;
/**
* Flush the log file, 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 file. It is required to write the log entries to the
* log file first, because the log file is 'write ahead'.
*/
void flushLog() throws SQLException;
}
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