org.ecside.common.H2DriverManagerDataSource.java Source code

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Here is the source code for org.ecside.common.H2DriverManagerDataSource.java

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/*
 * 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;
    }

}