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Robottinosino
Robottinosino

Reputation: 10882

JavaMail setDebug(true)

How can I setDebug(true) on a JavaMail session but capture the stream and use it in my logging framework? (Short of downloading the source, changing the method to accept a stream as a parameter, recompiling it, ...)

More generally, is there a standard way in Java to "hijack-and-redirect" generic stream output in this fashion? Note that System.out may be already polluted with other output and I have no idea how to "filter" that...

Upvotes: 9

Views: 10446

Answers (1)

RealHowTo
RealHowTo

Reputation: 35387

You can link a PrintStream to a ByteArrayOutputStream, tell to JavaMail to use your PrintStream, do the JavaMail stuff and finally, dump the the content of the ByteArrayOutputStream to your favorite logger.

        ByteArrayOutputStream os = new ByteArrayOutputStream();
        PrintStream ps = new PrintStream(os);
        Session mailSession = Session.getDefaultInstance(props, null);
        try {
           if (MAIL_DEBUG) {
                logger.info("JAVAMAIL debug mode is ON");
                mailSession.setDebugOut(ps);
                mailSession.setDebug(true);  
            }
            ...
            transport.close();
            if (MAIL_DEBUG) {
                logger.info(os);
            }
        }
          finally {
            ps.close();
            os.close();
        }

Upvotes: 11

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