/**
* Copyright (c) 2011-2017, James Zhan 詹波 (jfinal@126.com).
*
* 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 com.jfinal.plugin.druid;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import javax.sql.DataSource;
import com.alibaba.druid.filter.Filter;
import com.alibaba.druid.pool.DruidDataSource;
import com.jfinal.kit.StrKit;
import com.jfinal.plugin.IPlugin;
import com.jfinal.plugin.activerecord.IDataSourceProvider;
/**
* DruidPlugin.
*/
public class DruidPlugin implements IPlugin, IDataSourceProvider {
//连接池的名称
private String name = null;
// 基本属性 url、user、password
private String url;
private String username;
private String password;
private String publicKey;
private String driverClass = null; // 由 "com.mysql.jdbc.Driver" 改为 null 让 druid 自动探测 driverClass 值
// 初始连接池大小、最小空闲连接数、最大活跃连接数
private int initialSize = 10;
private int minIdle = 10;
private int maxActive = 100;
// 配置获取连接等待超时的时间
private long maxWait = DruidDataSource.DEFAULT_MAX_WAIT;
// 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
private long timeBetweenEvictionRunsMillis = DruidDataSource.DEFAULT_TIME_BETWEEN_EVICTION_RUNS_MILLIS;
// 配置连接在池中最小生存的时间
private long minEvictableIdleTimeMillis = DruidDataSource.DEFAULT_MIN_EVICTABLE_IDLE_TIME_MILLIS;
// 配置发生错误时多久重连
private long timeBetweenConnectErrorMillis = DruidDataSource.DEFAULT_TIME_BETWEEN_CONNECT_ERROR_MILLIS;
/**
* hsqldb - "select 1 from INFORMATION_SCHEMA.SYSTEM_USERS"
* Oracle - "select 1 from dual"
* DB2 - "select 1 from sysibm.sysdummy1"
* mysql - "select 1"
*/
private String validationQuery = "select 1";
private String connectionInitSql = null;
private String connectionProperties = null;
private boolean testWhileIdle = true;
private boolean testOnBorrow = false;
private boolean testOnReturn = false;
// 是否打开连接泄露自动检测
private boolean removeAbandoned = false;
// 连接长时间没有使用，被认为发生泄露时长
private long removeAbandonedTimeoutMillis = 300 * 1000;
// 发生泄露时是否需要输出 log，建议在开启连接泄露检测时开启，方便排错
private boolean logAbandoned = false;
// 是否缓存preparedStatement，即PSCache，对支持游标的数据库性能提升巨大，如 oracle、mysql 5.5 及以上版本
// private boolean poolPreparedStatements = false; // oracle、mysql 5.5 及以上版本建议为 true;
// 只要maxPoolPreparedStatementPerConnectionSize>0,poolPreparedStatements就会被自动设定为true，使用oracle时可以设定此值。
private int maxPoolPreparedStatementPerConnectionSize = -1;
// 配置监控统计拦截的filters
private String filters; // 监控统计："stat" 防SQL注入："wall" 组合使用： "stat,wall"
private List<Filter> filterList;
private DruidDataSource ds;
private boolean isStarted = false;
public DruidPlugin(String url, String username, String password) {
this.url = url;
this.username = username;
this.password = password;
this.validationQuery = autoCheckValidationQuery(url);
}
public DruidPlugin(String url, String username, String password, String driverClass) {
this.url = url;
this.username = username;
this.password = password;
this.driverClass = driverClass;
this.validationQuery = autoCheckValidationQuery(url);
}
public DruidPlugin(String url, String username, String password, String driverClass, String filters) {
this.url = url;
this.username = username;
this.password = password;
this.driverClass = driverClass;
this.filters = filters;
this.validationQuery = autoCheckValidationQuery(url);
}
/**
* @Title: autoCheckValidationQuery
* @Description: 自动设定探测sql
* @param url
* @return
* @since V1.0.0
*/
private static String autoCheckValidationQuery(String url){
if(url.startsWith("jdbc:oracle")){
return "select 1 from dual";
}else if(url.startsWith("jdbc:db2")){
return "select 1 from sysibm.sysdummy1";
}else if(url.startsWith("jdbc:hsqldb")){
return "select 1 from INFORMATION_SCHEMA.SYSTEM_USERS";
}else if(url.startsWith("jdbc:derby")){
return "select 1 from INFORMATION_SCHEMA.SYSTEM_USERS";
}
return "select 1";
}
/**
* 添加连接时的初始化sql。可以添加多次，在初次连接时使用，比如指定编码或者默认scheme等
* @param sql
*/
public void setConnectionInitSql(String sql){
this.connectionInitSql = sql;
}
public final String getName() {
return name;
}
/**
* 连接池名称
*
* @param name
*/
public final void setName(String name) {
this.name = name;
}
/**
* 设置过滤器，如果要开启监控统计需要使用此方法或在构造方法中进行设置
* <p>
* 监控统计："stat"
* 防SQL注入："wall"
* 组合使用： "stat,wall"
* </p>
*/
public DruidPlugin setFilters(String filters) {
this.filters = filters;
return this;
}
public synchronized DruidPlugin addFilter(Filter filter) {
if (filterList == null)
filterList = new ArrayList<Filter>();
filterList.add(filter);
return this;
}
public boolean start() {
if (isStarted)
return true;
ds = new DruidDataSource();
if(this.name != null){
ds.setName(this.name);
}
ds.setUrl(url);
ds.setUsername(username);
ds.setPassword(password);
if (driverClass != null)
ds.setDriverClassName(driverClass);
ds.setInitialSize(initialSize);
ds.setMinIdle(minIdle);
ds.setMaxActive(maxActive);
ds.setMaxWait(maxWait);
ds.setTimeBetweenConnectErrorMillis(timeBetweenConnectErrorMillis);
ds.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
ds.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
ds.setValidationQuery(validationQuery);
if(StrKit.notBlank(connectionInitSql)){
List<String> connectionInitSqls = new ArrayList<String>();
connectionInitSqls.add(this.connectionInitSql);
ds.setConnectionInitSqls(connectionInitSqls);
}
ds.setTestWhileIdle(testWhileIdle);
ds.setTestOnBorrow(testOnBorrow);
ds.setTestOnReturn(testOnReturn);
ds.setRemoveAbandoned(removeAbandoned);
ds.setRemoveAbandonedTimeoutMillis(removeAbandonedTimeoutMillis);
ds.setLogAbandoned(logAbandoned);
//只要maxPoolPreparedStatementPerConnectionSize>0,poolPreparedStatements就会被自动设定为true，参照druid的源码
ds.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);
boolean hasSetConnectionProperties = false;
if (StrKit.notBlank(filters)){
try {
ds.setFilters(filters);
//支持加解密数据库
if(filters.contains("config")){
//判断是否设定了公钥
if(StrKit.isBlank(this.publicKey)){
throw new RuntimeException("Druid连接池的filter设定了config时，必须设定publicKey");
}
String decryptStr = "config.decrypt=true;config.decrypt.key="+this.publicKey;
String cp = this.connectionProperties;
if(StrKit.isBlank(cp)){
cp = decryptStr;
}else{
cp = cp + ";" + decryptStr;
}
ds.setConnectionProperties(cp);
hasSetConnectionProperties = true;
}
} catch (SQLException e) {throw new RuntimeException(e);}
}
//确保setConnectionProperties被调用过一次
if(!hasSetConnectionProperties && StrKit.notBlank(this.connectionProperties)){
ds.setConnectionProperties(this.connectionProperties);
}
addFilterList(ds);
isStarted = true;
return true;
}
private void addFilterList(DruidDataSource ds) {
if (filterList != null) {
List<Filter> targetList = ds.getProxyFilters();
for (Filter add : filterList) {
boolean found = false;
for (Filter target : targetList) {
if (add.getClass().equals(target.getClass())) {
found = true;
break;
}
}
if (! found)
targetList.add(add);
}
}
}
public boolean stop() {
if (ds != null)
ds.close();
ds = null;
isStarted = false;
return true;
}
public DataSource getDataSource() {
return ds;
}
public DruidPlugin set(int initialSize, int minIdle, int maxActive) {
this.initialSize = initialSize;
this.minIdle = minIdle;
this.maxActive = maxActive;
return this;
}
public DruidPlugin setDriverClass(String driverClass) {
this.driverClass = driverClass;
return this;
}
public DruidPlugin setInitialSize(int initialSize) {
this.initialSize = initialSize;
return this;
}
public DruidPlugin setMinIdle(int minIdle) {
this.minIdle = minIdle;
return this;
}
public DruidPlugin setMaxActive(int maxActive) {
this.maxActive = maxActive;
return this;
}
public DruidPlugin setMaxWait(long maxWait) {
this.maxWait = maxWait;
return this;
}
public DruidPlugin setTimeBetweenEvictionRunsMillis(long timeBetweenEvictionRunsMillis) {
this.timeBetweenEvictionRunsMillis = timeBetweenEvictionRunsMillis;
return this;
}
public DruidPlugin setMinEvictableIdleTimeMillis(long minEvictableIdleTimeMillis) {
this.minEvictableIdleTimeMillis = minEvictableIdleTimeMillis;
return this;
}
/**
* hsqldb - "select 1 from INFORMATION_SCHEMA.SYSTEM_USERS"
* Oracle - "select 1 from dual"
* DB2 - "select 1 from sysibm.sysdummy1"
* mysql - "select 1"
*/
public DruidPlugin setValidationQuery(String validationQuery) {
this.validationQuery = validationQuery;
return this;
}
public DruidPlugin setTestWhileIdle(boolean testWhileIdle) {
this.testWhileIdle = testWhileIdle;
return this;
}
public DruidPlugin setTestOnBorrow(boolean testOnBorrow) {
this.testOnBorrow = testOnBorrow;
return this;
}
public DruidPlugin setTestOnReturn(boolean testOnReturn) {
this.testOnReturn = testOnReturn;
return this;
}
public DruidPlugin setMaxPoolPreparedStatementPerConnectionSize(int maxPoolPreparedStatementPerConnectionSize) {
this.maxPoolPreparedStatementPerConnectionSize = maxPoolPreparedStatementPerConnectionSize;
return this;
}
public final DruidPlugin setTimeBetweenConnectErrorMillis(long timeBetweenConnectErrorMillis) {
this.timeBetweenConnectErrorMillis = timeBetweenConnectErrorMillis;
return this;
}
public final DruidPlugin setRemoveAbandoned(boolean removeAbandoned) {
this.removeAbandoned = removeAbandoned;
return this;
}
public final DruidPlugin setRemoveAbandonedTimeoutMillis(long removeAbandonedTimeoutMillis) {
this.removeAbandonedTimeoutMillis = removeAbandonedTimeoutMillis;
return this;
}
public final DruidPlugin setLogAbandoned(boolean logAbandoned) {
this.logAbandoned = logAbandoned;
return this;
}
public final DruidPlugin setConnectionProperties(String connectionProperties) {
this.connectionProperties = connectionProperties;
return this;
}
public final DruidPlugin setPublicKey(String publicKey) {
this.publicKey = publicKey;
return this;
}
}