Decouple DruidDataSource in ConnectionFactory and cache DataSource instance (#2232)

* Decouple DruidDataSource in ConnectionFactory and cache DataSource
instance

* init dataSource first

* fix code smell

* add unit test

* add unit test

* add unit test

* add unit test

* fix unit test

* delete useless logger

dolphinscheduler-dao/src/main/java/org/apache/dolphinscheduler/dao/AlertDao.java

@@ -169,5 +169,11 @@ public class AlertDao extends AbstractBaseDao {
         return userAlertGroupMapper.listUserByAlertgroupId(alertgroupId);
     }
 
-
+    /**
+     * for test
+     * @return
+     */
+    public AlertMapper getAlertMapper() {
+        return alertMapper;
+    }
 }

dolphinscheduler-dao/src/main/java/org/apache/dolphinscheduler/dao/datasource/ConnectionFactory.java

@@ -51,6 +51,7 @@ public class ConnectionFactory extends SpringConnectionFactory {
 
     private ConnectionFactory() {
         try {
+            dataSource = buildDataSource();
             sqlSessionFactory = getSqlSessionFactory();
             sqlSessionTemplate = getSqlSessionTemplate();
         } catch (Exception e) {
@@ -69,12 +70,18 @@ public class ConnectionFactory extends SpringConnectionFactory {
      */
     private SqlSessionTemplate sqlSessionTemplate;
 
+    private DataSource dataSource;
+
+    public DataSource getDataSource() {
+        return dataSource;
+    }
+
     /**
      * get the data source
      *
      * @return druid dataSource
      */
-    public DruidDataSource getDataSource() {
+    private DataSource buildDataSource() {
 
         DruidDataSource druidDataSource = new DruidDataSource();
 
@@ -112,10 +119,9 @@ public class ConnectionFactory extends SpringConnectionFactory {
      * @throws Exception sqlSessionFactory exception
      */
     private SqlSessionFactory getSqlSessionFactory() throws Exception {
-        DataSource dataSource = getDataSource();
         TransactionFactory transactionFactory = new JdbcTransactionFactory();
 
-        Environment environment = new Environment("development", transactionFactory, dataSource);
+        Environment environment = new Environment("development", transactionFactory, getDataSource());
 
         MybatisConfiguration configuration = new MybatisConfiguration();
         configuration.setEnvironment(environment);
@@ -125,7 +131,7 @@ public class ConnectionFactory extends SpringConnectionFactory {
 
         MybatisSqlSessionFactoryBean sqlSessionFactoryBean = new MybatisSqlSessionFactoryBean();
         sqlSessionFactoryBean.setConfiguration(configuration);
-        sqlSessionFactoryBean.setDataSource(dataSource);
+        sqlSessionFactoryBean.setDataSource(getDataSource());
 
         sqlSessionFactoryBean.setTypeEnumsPackage("org.apache.dolphinscheduler.*.enums");
         sqlSessionFactory = sqlSessionFactoryBean.getObject();

dolphinscheduler-dao/src/main/java/org/apache/dolphinscheduler/dao/upgrade/UpgradeDao.java

@@ -27,6 +27,7 @@ import org.apache.dolphinscheduler.dao.datasource.ConnectionFactory;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import javax.sql.DataSource;
 import java.io.*;
 import java.sql.Connection;
 import java.sql.PreparedStatement;
@@ -40,7 +41,7 @@ public abstract class UpgradeDao extends AbstractBaseDao {
     private static final String T_VERSION_NAME = "t_escheduler_version";
     private static final String T_NEW_VERSION_NAME = "t_ds_version";
     private static final String rootDir = System.getProperty("user.dir");
-    protected static final DruidDataSource dataSource = getDataSource();
+    protected static final DataSource dataSource = getDataSource();
     private static final DbType dbType = getCurrentDbType();
 
     @Override
@@ -52,13 +53,8 @@ public abstract class UpgradeDao extends AbstractBaseDao {
      * get datasource
      * @return DruidDataSource
      */
-    public static DruidDataSource getDataSource(){
-        DruidDataSource dataSource = ConnectionFactory.getInstance().getDataSource();
-        dataSource.setInitialSize(2);
-        dataSource.setMinIdle(2);
-        dataSource.setMaxActive(2);
-
-        return dataSource;
+    public static DataSource getDataSource(){
+        return ConnectionFactory.getInstance().getDataSource();
     }
 
     /**

dolphinscheduler-dao/src/test/java/org/apache/dolphinscheduler/dao/AlertDaoTest.java

@@ -16,19 +16,42 @@
  */
 package org.apache.dolphinscheduler.dao;
 
+import org.apache.dolphinscheduler.common.enums.AlertStatus;
+import org.apache.dolphinscheduler.common.enums.AlertType;
+import org.apache.dolphinscheduler.common.enums.ShowType;
+import org.apache.dolphinscheduler.dao.entity.Alert;
 import org.junit.Assert;
 import org.junit.Test;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-public class AlertDaoTest {
-    private static final Logger logger = LoggerFactory.getLogger(AlertDaoTest.class);
+import java.util.Arrays;
+import java.util.List;
 
+public class AlertDaoTest {
     @Test
-    public void testGetAlertDao() {
-        logger.info("testGetAlertDao start");
+    public void testAlertDao(){
         AlertDao alertDao = DaoFactory.getDaoInstance(AlertDao.class);
-        Assert.assertNotNull(alertDao);
-        logger.info("testGetAlertDao end");
+        Alert alert = new Alert();
+        alert.setTitle("Mysql Exception");
+        alert.setShowType(ShowType.TEXT);
+        alert.setContent("[\"alarm time：2018-02-05\", \"service name：MYSQL_ALTER\", \"alarm name：MYSQL_ALTER_DUMP\", " +
+                "\"get the alarm exception.！，interface error，exception information：timed out\", \"request address：http://blog.csdn.net/dreamInTheWorld/article/details/78539286\"]");
+        alert.setAlertType(AlertType.EMAIL);
+        alert.setAlertGroupId(1);
+        alert.setAlertStatus(AlertStatus.WAIT_EXECUTION);
+        alertDao.addAlert(alert);
+
+
+        List<Alert> alerts = alertDao.listWaitExecutionAlert();
+        Assert.assertNotNull(alerts);
+        Assert.assertNotEquals(0, alerts.size());
+        int id = alerts.get(0).getId();
+        AlertStatus alertStatus = alerts.get(0).getAlertStatus();
+        alertDao.updateAlert(AlertStatus.EXECUTION_SUCCESS, "", id);
+
+        alerts = alertDao.listWaitExecutionAlert();
+        Assert.assertEquals(0, alerts.size());
+        alertDao.getAlertMapper().deleteById(id);
     }
 }

dolphinscheduler-dao/src/test/java/org/apache/dolphinscheduler/dao/mapper/ConnectionFactoryTest.java

@@ -31,7 +31,7 @@ public class ConnectionFactoryTest {
      */
     @Test
     public void testConnection()throws Exception{
-        Connection connection = ConnectionFactory.getInstance().getDataSource().getPooledConnection().getConnection();
+        Connection connection = ConnectionFactory.getInstance().getDataSource().getConnection();
         Assert.assertTrue(connection != null);
     }
 }