Swathi Prasad

I agree with this point. Messaging is important for implementing resilient systems. But retry mechanism may unfortunately be needed for legacy systems as it may not be easy or requires more effort to implement messaging.

Thanks. When do you get NullPointerException? What exactly is null?

JMS template is configured automatically by Spring Boot. We just provide ActiveMQ server configuration via application.properties.

Hi,

Yes, we can have both sender and receiver within a Spring Boot application. Here is an example from Spring docs https://spring.io/guides/gs/messaging-jms/.

Hi, the error seems to be with your data model. May be, you can post your code?

Thanks for reading my article. Then biggest difference is: OPTIMISTIC ensures that the other object has not been updated at the time of your commit. OPTIMISTIC_FORCE_INCREMENT ensures that other object has not been updated, and increments its version on commit.

Did you check the contents when tomcat unpacked war contents? Do you see any errors in browser or tomcat catalina log?

I checked your POM files and I don't see any problem. If you want, you can remove the following plugin. spring-boot-maven plugin will take care of packaging.

</configuration>

Have you checked the contents of your war file? Make sure to verify if your classes and all Angular resources are present.

It seems your war file is not correct. Can you provide your pom structure in some way? Please don't provide in the comment here. It would be hard to read.

What is the Spring Boot version at your end? Try deleting your local m2 repository and download the maven dependencies again.

I have added .gitignore file to the project.

Hi Mehdi, unfortunately, I did not find time to do it yet. If you find time, you can also create a pull request. Thanks.

Sure, I will try to add soon.

It comes from spring boot starter security plugin. The user name is user and password is the generated one in console on server startup.

Is your npm install working correctly? To verify, you can run npm install on ExpenseAnalyst-frontend project.

I am not sure why it is looking in artifactory. How did you build the project?

Have you added spring boot maven plugin in parent pom by any chance?

Can you provide contents of pom.xml in ExpenseAnalyst-frontend module?

Hi Dany,

What is the port for tomcat server? I don't see any port here for example, http://localhost/styles.34c57ab7888ec1573f9c.css.

Do you see JavaScript and CSS files in /tutorial-app/WEB-INF⁩/classes⁩/resources/?

Thanks!

Thanks for the information!

Yes, I did not mention the built-in one. I picked the ones that are not very common. I use sl4j in most of the applications. It has been quite sometime since I used Apache commons logging.

I use logstash and logback as part of ELK stack, and use sl4j in other applications.

This list returns an immutable list containing an arbitrary number of elements. In Java8 or earlier versions, we used to create an empty immutable or unmodifiable list for example:

List<String> emptyList = new ArrayList<>(); List<String> immutableList = Collections.unmodifiableList(emptyList);

Hi Matteo, I have never tried this one before. It looks simple and straightforward. Thanks!

Nice article! I really don't want to get into Regex complex patterns, unless I have no choice. They are scary :-)

There is one here https://github.com/jaumard/ng2-dashboard/. I have not tried though.