javax.naming.NoInitialContextException Tomcat DataSource JNDI intellij idea 14 - mysql

Question

I am trying go get Connection Pool with Tomcat DataSource and MySQL in ntellij idea 14. I've done these steps:
Select "Project Structure" from the File menu
From there, select the "Facets" option. Make sure that you have a Web
facet configured. If not, add one.
Once the web facet is added, select "Add Application Server specific
descriptor..."
Select Tomcat Context Descriptor from the options and click OK.
I got META-INF/context.xml in web directory. I added next lines in context.xml
<?xml version="1.0" encoding="UTF-8"?>
<Context>
<Resource name="jdbc/payments"
auth="Container"
type="javax.sql.DataSource"
driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/paymentsdb"
username="root"
password="password"
maxActive="100"
maxIdle="20"
minIdle="5"
maxWait="10000"/>
</Context>
And this into web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<!--DB Connection start-->
<description>MySQL Test App</description>
<resource-ref>
<description>DB Connection</description>
<res-ref-name>jdbc/payments</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</web-app>
This is my method to get connection
public static Connection createConnection(){
Context context = null;
DataSource dataSource = null;
Connection connection = null;
try {
context = (Context) new InitialContext().lookup("java:comp/env");
dataSource = (DataSource) context.lookup("jdbc/payments");
connection = dataSource.getConnection();
} catch (NamingException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
return connection;
}
I got this exception in line
dataSource = (DataSource)
context.lookup("java:comp/env/jdbc/payments");
javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:662)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:313)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:350)
at javax.naming.InitialContext.lookup(InitialContext.java:417)
at ua.epam.kuts.dao.MySQLDAOFactory.createConnection(MySQLDAOFactory.java:22)
at Test.main(Test.java:17)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
I use Tomcat 8.0.23. Any idea? I googled for several hours and didn't find anything that helped me. Drew me mad. I checked connection with Statment and it works. I have connector.jar.

Answer 1

I've done stupid mistake. I was trying to test DataSource connection running it in public static main(String[] args) method instead of running it on the server. That's why InitialContext was not initialized. Found answer here in second post.