com.xiaoleilu.hutool.db.ds.DSFactory Maven / Gradle / Ivy
package com.xiaoleilu.hutool.db.ds;
import javax.sql.DataSource;
import com.xiaoleilu.hutool.db.ds.c3p0.C3p0DSFactory;
import com.xiaoleilu.hutool.db.ds.dbcp.DbcpDSFactory;
import com.xiaoleilu.hutool.db.ds.druid.DruidDSFactory;
import com.xiaoleilu.hutool.db.ds.hikari.HikariDSFactory;
import com.xiaoleilu.hutool.db.ds.pooled.PooledDSFactory;
import com.xiaoleilu.hutool.db.ds.tomcat.TomcatDSFactory;
import com.xiaoleilu.hutool.io.IORuntimeException;
import com.xiaoleilu.hutool.log.Log;
import com.xiaoleilu.hutool.log.LogFactory;
import com.xiaoleilu.hutool.setting.Setting;
import com.xiaoleilu.hutool.util.StrUtil;
/**
* 数据源工厂类
*
* @author Looly
*
*/
public abstract class DSFactory {
private static final Log log = LogFactory.get();
protected static final String DEFAULT_DB_SETTING_PATH = "config/db.setting";
protected static final String DEFAULT_DB_SETTING_PATH2 = "db.setting";
/** 别名字段名:URL */
public static final String[] KEY_ALIAS_URL = {"url", "jdbcUrl"};
/** 别名字段名:用户名 */
public static final String[] KEY_ALIAS_USER = {"user", "username"};
/** 别名字段名:密码 */
public static final String[] KEY_ALIAS_PASSWORD = {"password", "pass"};
/** 别名字段名:驱动名 */
public static final String[] KEY_ALIAS_DRIVER = {"driver", "driverClassName"};
/** 数据源名 */
private String dataSourceName;
/** 数据库连接配置文件 */
protected Setting setting;
/**
* 构造
*
* @param dataSourceName 数据源名称
* @param dataSourceClass 数据库连接池实现类,用于检测所提供的DataSource类是否存在,当传入的DataSource类不存在时抛出ClassNotFoundException
* 此参数的作用是在detectDSFactory方法自动检测所用连接池时,如果实现类不存在,调用此方法会自动抛出异常,从而切换到下一种连接池的检测。
* @param setting 数据库连接配置
*/
public DSFactory(String dataSourceName, Class extends DataSource> dataSourceClass, Setting setting) {
this.dataSourceName = dataSourceName;
if (null == setting) {
try {
setting = new Setting(DEFAULT_DB_SETTING_PATH, true);
} catch (IORuntimeException e) {
//尝试ClassPath下直接读取配置问津
setting = new Setting(DEFAULT_DB_SETTING_PATH2, true);
}
}
this.setting = setting;
}
/**
* 获得默认数据源
*
* @return 数据源
*/
public DataSource getDataSource() {
return getDataSource(StrUtil.EMPTY);
}
/**
* 获得分组对应数据源
*
* @param group 分组名
* @return 数据源
*/
public abstract DataSource getDataSource(String group);
/**
* 关闭默认数据源(空组)
*/
public void close() {
close(StrUtil.EMPTY);
}
/**
* 关闭对应数据源
*
* @param group 分组
*/
public abstract void close(String group);
/**
* 销毁工厂类,关闭所有数据源
*/
public abstract void destroy();
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((dataSourceName == null) ? 0 : dataSourceName.hashCode());
result = prime * result + ((setting == null) ? 0 : setting.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
DSFactory other = (DSFactory) obj;
if (dataSourceName == null) {
if (other.dataSourceName != null) {
return false;
}
} else if (!dataSourceName.equals(other.dataSourceName)) {
return false;
}
if (setting == null) {
if (other.setting != null) {
return false;
}
} else if (!setting.equals(other.setting)) {
return false;
}
return true;
}
// ------------------------------------------------------------------------- Static start
// JVM关闭是关闭所有连接池
static {
Runtime.getRuntime().addShutdownHook(new Thread(){
@Override
public void run() {
if (null != currentDSFactory) {
currentDSFactory.destroy();
log.debug("DataSource: [{}] destroyed.", currentDSFactory.dataSourceName);
}
}
});
}
private static DSFactory currentDSFactory;
private static final Object lock = new Object();
/**
* 获得数据源
* 使用默认配置文件的无分组配置
*
* @return 数据源
*/
public static DataSource get() {
return get(null);
}
/**
* 获得数据源
*
* @param group 配置文件中对应的分组
* @return 数据源
*/
public static DataSource get(String group) {
return get(null, group);
}
/**
* 获得数据源
*
* @param dbSetting 数据库配置文件,如果为null
,查找默认的配置文件
* @param group 配置文件中对应的分组
* @return 数据源
*/
public static DataSource get(Setting dbSetting, String group) {
return getCurrentDSFactory(dbSetting).getDataSource(group);
}
/**
* @param setting 数据源配置文件
* @return 当前使用的数据源工厂
*/
public static DSFactory getCurrentDSFactory(Setting setting) {
if (null == currentDSFactory) {
synchronized (lock) {
if (null == currentDSFactory) {
currentDSFactory = detectDSFactory(setting);
}
}
}
return currentDSFactory;
}
/**
* @param dsFactory 数据源工厂
* @return 自定义的数据源工厂
*/
synchronized public static DSFactory setCurrentDSFactory(DSFactory dsFactory) {
if (null != currentDSFactory) {
if (currentDSFactory.equals(dsFactory)) {
return currentDSFactory;// 数据源不变时返回原数据源
}
// 自定义数据源工厂前关闭之前的数据源
currentDSFactory.destroy();
}
log.debug("Custom use [{}] datasource.", dsFactory.dataSourceName);
currentDSFactory = dsFactory;
return currentDSFactory;
}
/**
* 决定数据源实现工厂
* 连接池优先级:Hikari > Druid > Tomcat > Dbcp > C3p0 > Hutool Pooled
*
* @return 日志实现类
*/
private static DSFactory detectDSFactory(Setting setting) {
DSFactory dsFactory;
try {
dsFactory = new HikariDSFactory(setting);
} catch (NoClassDefFoundError e1) {
try {
dsFactory = new DruidDSFactory(setting);
} catch (NoClassDefFoundError e2) {
try {
dsFactory = new TomcatDSFactory(setting);
} catch (NoClassDefFoundError e3) {
try {
dsFactory = new DbcpDSFactory(setting);
} catch (NoClassDefFoundError e4) {
try {
dsFactory = new C3p0DSFactory(setting);
} catch (NoClassDefFoundError e5) {
// 默认使用Hutool实现的简易连接池
dsFactory = new PooledDSFactory(setting);
}
}
}
}
}
log.debug("Use [{}] DataSource As Default", dsFactory.dataSourceName);
return dsFactory;
}
// ------------------------------------------------------------------------- Static end
}
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