New working version after Victoria trip - DB connection management

src/main/java/it/inaf/oats/vospacebackend/implementation/DBConnectionMng.java

+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package it.inaf.oats.vospacebackend.implementation;
+
+import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;
+import it.inaf.oats.vospacebackend.exceptions.ExceptionMessage;
+import it.inaf.oats.vospacebackend.exceptions.VOSpaceBackendException;
+import java.sql.Connection;
+import java.sql.SQLException;
+import javax.naming.Context;
+import javax.naming.InitialContext;
+import javax.naming.NamingException;
+import javax.sql.DataSource;
+import org.apache.log4j.Logger;
+
+/**
+ *
+ * @author bertocco
+ */
+public class DBConnectionMng {
+       
+    private static final Logger log = Logger.getLogger(DBConnectionMng.class);
+    
+    public static Connection getDBConnection() throws SQLException, VOSpaceBackendException {
+
+        DataSource ds = getDataSource();
+        Connection dbConnection = ds.getConnection();
+        			               
+	return dbConnection;
+
+    }
+    
+    
+    public static DataSource getDataSource() {
+        
+        DataSource ds = null;
+        
+        try {
+            Context initContext = new InitialContext();
+            Context envContext = (Context) initContext.lookup("java:comp/env");
+            String vosNodesDataSourceName = "jdbc/cadctest";
+            ds = (DataSource) envContext.lookup(vosNodesDataSourceName);
+        } catch (NamingException ex) {
+            log.fatal(ex);
+            ds = null;
+        }
+        
+        return ds;
+    }
+    
+    
+    
+    /**
+     * Providing a data source.
+     */
+    /*
+    protected DataSource getDataSource() {
+    
+        MysqlDataSource dataSource = new MysqlDataSource();
+        dataSource.setDatabaseName("cadctest");
+        dataSource.setUser("oatsops");
+        dataSource.setPassword("Peper0ne");
+        dataSource.setServerName("localhost");
+        
+        return dataSource;
+    }
+    */
+    
+}