[logback-dev] [JIRA] (LOGBACK-909) SMTPAppender synchronization problem in Asynchronous mode

Wed, 09 Oct 2013 11:16:18 -0700

Issue Type: Bug Bug
Affects Versions: 1.0.13
Assignee: Logback dev list
Components: logback-classic
Created: 09/Oct/13 8:17 PM
Description:

Method SMTPAppender.sendBuffer using mimeMsg, but not synchronized

App.java
package com.mycompany.mavenproject4;

import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.PatternLayout;
import ch.qos.logback.classic.net.SMTPAppender;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.Layout;
import ch.qos.logback.core.status.OnConsoleStatusListener;
import com.icegreen.greenmail.util.GreenMail;
import com.icegreen.greenmail.util.GreenMailUtil;
import com.icegreen.greenmail.util.ServerSetup;
import javax.mail.Multipart;
import javax.mail.internet.MimeMessage;

public class App {

	private static final String DEFAULT_PATTERN = "%-4relative %mdc [%thread] %-5level %class - %msg%n";
	private LoggerContext loggerContext = new LoggerContext();
	private Logger logger = loggerContext.getLogger(this.getClass());
	private GreenMail greenMail;

	public static void main(String... args) throws Exception {

		App app = new App();
		app.test();
	}

	public void test() throws Exception {

		OnConsoleStatusListener.addNewInstanceToContext(loggerContext);

		startGreenMail();
		try {
			SMTPAppender smtpAppender = buildSMTPAppender();
			smtpAppender.start();

			logger.addAppender(smtpAppender);
			logger.error("Message1");
			logger.error("Message2");

			greenMail.waitForIncomingEmail(5000, 2);
			for (MimeMessage mimeMessage : greenMail.getReceivedMessages()) {

				String subject = mimeMessage.getSubject();

				Multipart multipart = (Multipart) mimeMessage.getContent();
				String body = GreenMailUtil.getBody(multipart.getBodyPart(0));

				System.out.println("subject=" + subject);
				System.out.println("body=" + body);
				System.out.println();
			}

		} finally {
			stopGreenMail();
		}
	}

	private void startGreenMail() throws InterruptedException {
		greenMail = new GreenMail(new ServerSetup(25, "localhost", ServerSetup.PROTOCOL_SMTP));
		greenMail.start();
		Thread.currentThread().sleep(50);
	}

	private void stopGreenMail() {
		greenMail.stop();
	}

	private SMTPAppender buildSMTPAppender() {
		SMTPAppender smtpAppender = new SMTPAppender();
		smtpAppender.setContext(loggerContext);
		smtpAppender.setSubject("%msg");
		smtpAppender.addTo("nos...@qos.ch");
		smtpAppender.setAsynchronousSending(true);
		smtpAppender.setLayout(buildPatternLayout());
		return smtpAppender;
	}

	private Layout<ILoggingEvent> buildPatternLayout() {
		PatternLayout layout = new PatternLayout();
		layout.setContext(loggerContext);
		layout.setPattern(DEFAULT_PATTERN);
		layout.start();
		return layout;
	}
}
output1

22:03:00,396 |-INFO in ch.qos.logback.classic.net.SMTPAppender[null] - SMTPAppender [null] is tracking [1] buffers
22:03:00,412 |-INFO in ch.qos.logback.classic.net.SMTPAppender[null] - About to send out SMTP message "Message2" to [nos...@qos.ch]
22:03:00,413 |-INFO in ch.qos.logback.classic.net.SMTPAppender[null] - About to send out SMTP message "Message1" to [nos...@qos.ch]
subject=Message1
body=225 [main] ERROR ? - Message1

subject=Message1
body=225 [main] ERROR ? - Message1

output2

22:03:29,514 |-INFO in ch.qos.logback.classic.net.SMTPAppender[null] - SMTPAppender [null] is tracking [1] buffers
22:03:29,528 |-INFO in ch.qos.logback.classic.net.SMTPAppender[null] - About to send out SMTP message "Message1" to [nos...@qos.ch]
22:03:29,528 |-INFO in ch.qos.logback.classic.net.SMTPAppender[null] - About to send out SMTP message "Message2" to [nos...@qos.ch]
subject=Message2
body=223 [main] ERROR ? - Message2

subject=Message2
body=223 [main] ERROR ? - Message2
Project: logback
Priority: Major Major
Reporter: Alex Lumpov
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