org.hibernate.FlushMode Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*
*/
package org.hibernate;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
/**
* Represents a flushing strategy. The flush process synchronizes
* database state with session state by detecting state changes
* and executing SQL statements.
*
* @see Session#setFlushMode(FlushMode)
* @see Query#setFlushMode(FlushMode)
* @see Criteria#setFlushMode(FlushMode)
*
* @author Gavin King
*/
public final class FlushMode implements Serializable {
private static final Map INSTANCES = new HashMap();
private final int level;
private final String name;
private FlushMode(int level, String name) {
this.level = level;
this.name = name;
}
public String toString() {
return name;
}
/**
* The {@link Session} is never flushed unless {@link Session#flush}
* is explicitly called by the application. This mode is very
* efficient for read only transactions.
*
* @deprecated use {@link #MANUAL} instead.
*/
public static final FlushMode NEVER = new FlushMode( 0, "NEVER" );
/**
* The {@link Session} is only ever flushed when {@link Session#flush}
* is explicitly called by the application. This mode is very
* efficient for read only transactions.
*/
public static final FlushMode MANUAL = new FlushMode( 0, "MANUAL" );
/**
* The {@link Session} is flushed when {@link Transaction#commit}
* is called.
*/
public static final FlushMode COMMIT = new FlushMode(5, "COMMIT");
/**
* The {@link Session} is sometimes flushed before query execution
* in order to ensure that queries never return stale state. This
* is the default flush mode.
*/
public static final FlushMode AUTO = new FlushMode(10, "AUTO");
/**
* The {@link Session} is flushed before every query. This is
* almost always unnecessary and inefficient.
*/
public static final FlushMode ALWAYS = new FlushMode(20, "ALWAYS");
public boolean lessThan(FlushMode other) {
return this.level