修复链接失败会一直重连,并且连接成功之后也不缓存下来 (#495)

Co-authored-by: chenyh <chenyh.me@gamil.com>

eladmin-system/src/main/java/me/zhengjie/modules/mnt/util/SqlUtils.java

@@ -20,13 +20,15 @@ import com.alibaba.druid.pool.DruidDataSource;
 import com.alibaba.druid.util.StringUtils;
 import com.google.common.collect.Lists;
 import lombok.extern.slf4j.Slf4j;
+
 import javax.sql.DataSource;
-import java.io.*;
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStreamReader;
 import java.nio.charset.StandardCharsets;
 import java.sql.*;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 
 /**
  * @author /
@@ -36,20 +38,6 @@ public class SqlUtils {
 
 	public static final String COLON = ":";
 
-	private static volatile Map<String, DruidDataSource> map = new HashMap<>();
-
-	private static String getKey(String jdbcUrl, String username, String password) {
-		StringBuilder sb = new StringBuilder();
-		if (!StringUtils.isEmpty(username)) {
-			sb.append(username);
-		}
-		if (!StringUtils.isEmpty(password)) {
-			sb.append(COLON).append(password);
-		}
-		sb.append(COLON).append(jdbcUrl.trim());
-
-		return SecureUtil.md5(sb.toString());
-	}
 
 	/**
 	 * 获取数据源
@@ -60,10 +48,7 @@ public class SqlUtils {
 	 * @return DataSource
 	 */
 	private static DataSource getDataSource(String jdbcUrl, String userName, String password) {
-		String key = getKey(jdbcUrl, userName, password);
-		if (!map.containsKey(key) || null == map.get(key)) {
 		DruidDataSource druidDataSource = new DruidDataSource();
-
 		String className;
 		try {
 			className = DriverManager.getDriver(jdbcUrl.trim()).getClass().getName();
@@ -91,24 +76,16 @@ public class SqlUtils {
 		druidDataSource.setMinIdle(1);
 		druidDataSource.setMaxActive(1);
 
-			// 配置间隔多久才进行一次检测需要关闭的空闲连接，单位是毫秒
-			druidDataSource.setTimeBetweenEvictionRunsMillis(50000);
-			// 配置一旦重试多次失败后等待多久再继续重试连接，单位是毫秒
-			druidDataSource.setTimeBetweenConnectErrorMillis(18000);
-			// 配置一个连接在池中最小生存的时间，单位是毫秒
-			druidDataSource.setMinEvictableIdleTimeMillis(300000);
-			// 这个特性能解决 MySQL 服务器8小时关闭连接的问题
-			druidDataSource.setMaxEvictableIdleTimeMillis(25200000);
-
+		// 如果链接出现异常则直接判定为失败而不是一直重试
+		druidDataSource.setBreakAfterAcquireFailure(true);
 		try {
 			druidDataSource.init();
 		} catch (SQLException e) {
 			log.error("Exception during pool initialization", e);
 			throw new RuntimeException(e.getMessage());
 		}
-			map.put(key, druidDataSource);
-		}
-		return map.get(key);
+
+		return druidDataSource;
 	}
 
 	private static Connection getConnection(String jdbcUrl, String userName, String password) {