Imagine a basic web app (SPA, REST API, Sql database) with a new-user registration form. The form collects a first and last name of a new user. It is decided that the middle name needs to be collected on the form as well.
An key thing to remember in Spring Batch is that an instance of a Spring Batch job can only be restarted if it FAILED. If the job completeds SUCCESSFULLY a new instance of the job will have to be created to run it again.
To create a service in Angular:
In Spring Batch, when configuring a step you can set the chunk size.
If you have a kubernetes pod being terminated due to OOMKilled (Out of Memory Killed), you can monitor the memory usage of the pod during the action that is using too much memory.
To create a brand new spring boot app and deploy to a web server in 8 steps you can use the following:
To Install the Spring Boot Command Line Interface:
If you have a container in kubernetes unexpectedly disconnect with no error in the console log you can check the pod yaml for the last state of the pod.
Spring profiles can be used to toggle behaviors in a spring app. If your app is running in a container in Rancher (Kubernetes) you may need to see what spring profiles are being applied. To check what spring profiles a service is running in Rancher:
When running multiple batch jobs in Spring Batch, the default JobLauncher waits to launch a job until the previous job running is COMPLETE. In order to run multiple batch jobs simultaneously, the JobLauncher must be configured to run jobs asynchronously.
Often in designing batch jobs you want to limit the frequency that a job can run. For example, if you want a batch job to run once a day, you can use @Scheduled annotation to run the batch job once a day. This is enough if you only run one instance of the batch program and there are no other ways to launch the job.
