/*
* Copyright 2004-2015 the Seasar Foundation and the Others.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*/
package org.seasar.extension.jdbc.util;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Iterator;
import org.seasar.framework.util.LruHashMap;
import org.seasar.framework.util.StatementUtil;
/**
* {@link Statement}をキャッシュするクラスです。
*
* @author higa
*
*/
public class StatementCache extends LruHashMap {
/**
*
*/
private static final long serialVersionUID = 1L;
/**
* {@link StatementCache}を作成します。
*
* @param limitSize
* 制限数
*/
public StatementCache(int limitSize) {
super(limitSize);
}
@SuppressWarnings("unchecked")
@Override
protected boolean removeEldestEntry(java.util.Map.Entry entry) {
if (super.removeEldestEntry(entry)) {
Statement stmt = (Statement) entry.getValue();
StatementUtil.close(stmt);
return true;
}
return false;
}
/**
* キャッシュしている {@link Statement}を破棄します。
*
* @throws SQLException
* SQL例外が発生した場合
*/
@SuppressWarnings("unchecked")
public void destroy() throws SQLException {
SQLException e = null;
for (Iterator i = values().iterator(); i.hasNext();) {
Statement stmt = (Statement) i.next();
try {
stmt.close();
} catch (SQLException ex) {
e = ex;
}
}
clear();
if (e != null) {
throw e;
}
}
}