/*
* 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.impl;
import java.util.LinkedList;
import org.seasar.extension.jdbc.SqlLog;
import org.seasar.extension.jdbc.SqlLogRegistry;
/**
* {@link SqlLogRegistry}の実装クラスです。
*
* @author taedium
*/
public class SqlLogRegistryImpl implements SqlLogRegistry {
private static final int DEFAULT_LIMIT_SIZE = 3;
private int limitSize;
private ThreadLocal threadList = new ThreadLocal();
/**
* デフォルトの上限サイズを使用してインスタンスを構築します。
*
*/
public SqlLogRegistryImpl() {
this(DEFAULT_LIMIT_SIZE);
}
/**
* 上限サイズを指定してインスタンスを構築します。
*
* @param limitSize
* 上限サイズ
*/
public SqlLogRegistryImpl(int limitSize) {
this.limitSize = limitSize;
}
public int getLimitSize() {
return limitSize;
}
public int getSize() {
return getSqlLogList().size();
}
public boolean isEmpty() {
return getSize() == 0;
}
public SqlLog get(int index) {
return (SqlLog) getSqlLogList().get(index);
}
public SqlLog getLast() {
return isEmpty() ? null : (SqlLog) getSqlLogList().getLast();
}
public void add(SqlLog sqlLog) {
if (limitSize <= 0) {
return;
}
LinkedList list = getSqlLogList();
list.add(sqlLog);
if (list.size() > limitSize) {
list.removeFirst();
}
}
public void clear() {
getSqlLogList().clear();
}
private LinkedList getSqlLogList() {
LinkedList list = (LinkedList) threadList.get();
if (list == null) {
list = new LinkedList();
threadList.set(list);
}
return list;
}
}