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javaspringspring-bootjndi

How to initialize a JndiTemplate in Spring Boot

I'm sure I'm expecting too much when using the JNDITemplate in Spring Boot, but when I try to bind an object to the JNDI context I get an exception.

@Bean
CommandLineRunner initJndi() {
    return (args) -> {
        Properties props = new Properties();
        props.put("mail.smtp.host", "mail.bla.com");
        ... 
        Session session = Session.getDefaultInstance(props, new javax.mail.Authenticator() {
        });

        JndiTemplate template = new JndiTemplate();
        template.bind("Session", session); 
    };
}

The exception is:

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

The template does not have a JNDI context. But the question is, how is the context to be provided?

Background I want to configure the javax.mail session for a logback smtp appender. The smtp appender is able to use the mail session from JNDI. See logback SMTPAppender the sessionViaJNDI property.

Solution

  • The exception is because you haven't specified an initial context factory.

    Please take a look at some of the providers listed here https://docs.oracle.com/cd/A97688_16/generic.903/a97690/jndi.htm#1005621.

    Spring has a JndiRmiServiceExporter that makes RMI easy, but I think the choice depends on what exactly you're trying to accomplish.