h2drivermanagerdatasource.java

ecside jsp前途分页的标签 实现ajax 增删改查等

/*
 * Copyright 2006-2007 original author or authors.
 *
 * 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.ecside.common;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.sql.Connection;

import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.util.FileCopyUtils;
import org.springframework.util.StringUtils;

/**
 * @author Wei Zijun
 *
 */

public class H2DriverManagerDataSource extends DriverManagerDataSource
		implements InitializingBean,DisposableBean {

	
	private static String rootRealPath="";
	
	private static final String C_RootRealPath="\\{root\\}";
	
	private String defaultDB;

	private boolean autoReset =true;
	
	private Connection conn; 
	

	public static void setRoot(String root){
		rootRealPath=root;
	}
	private static String getDBPathFromUrl(String url) {
		if (url==null || url.length()<1 || url.indexOf("file:")<0) return null;
		url=url.substring(url.indexOf("file:")+5);
		return url;
	}

	public void afterPropertiesSet() throws Exception {
		if (autoReset) {
			String dbPath = getDBPathFromUrl(getUrl());

			try {

				File dataFile = new File(dbPath + ".data.db");
				File indexFile = new File(dbPath + ".index.db");
				File traceFile = new File(dbPath + ".trace.db");

				FileCopyUtils.copy(new FileInputStream(defaultDB
						+ ".data.db"), new FileOutputStream(dataFile));
				FileCopyUtils.copy(new FileInputStream(defaultDB
						+ ".index.db"), new FileOutputStream(indexFile));
				FileCopyUtils.copy(new FileInputStream(defaultDB
						+ ".trace.db"), new FileOutputStream(traceFile));

			} catch (IOException e) {
				logger.error("Copy Default db file error");
			}
		}
		
		conn=getConnection();
		int i=0;
		while (conn==null&&i<5){
			conn=getConnection();
			i++;
		}
	}
	
	public void destroy() throws Exception {
		if (conn!=null) conn.close();
	}

	public void setUrl(String url) {
		if (!StringUtils.hasText(url)) {
			throw new IllegalArgumentException("url must not be empty");
		}
		url = url.replaceFirst(C_RootRealPath,rootRealPath);
		super.setUrl(url.trim());
	}

	public void setDefaultDB(String defaultDB) {
		if (!StringUtils.hasText(defaultDB)) {
			throw new IllegalArgumentException("url must not be empty");
		}
		this.defaultDB = defaultDB.replaceFirst(C_RootRealPath,rootRealPath).trim();
	}

	public boolean isAutoReset() {
		return autoReset;
	}

	public void setAutoReset(boolean autoReset) {
		this.autoReset = autoReset;
	}

	public String getDefaultDB() {
		return defaultDB;
	}







}