Java – How to override application.properties during production in Spring-Boot

javaspringspring-boot

I'm using spring boot and application.properties to select a database during development by @Configuration @Profile("dev").

spring.profiles.active=dev
spring.config.location=file:d:/application.properties

During production I'd like to create a file outside of the application context that should be loaded and then active a different configuration profile, with d:/application.properties:

spring.profiles.active=production

Result: when I start the app, the configuration is still dev, so somehow the additional location of the productive properties file is not taken into account. Am I missing anything?

spring boot 1.1.0.BUILD-SNAPSHOT

Note: this question is NOT about tomcat.

Best Answer

I know you asked how to do this, but the answer is you should not do this.

Instead, have a application.properties, application-default.properties application-dev.properties etc., and switch profiles via args to the JVM: e.g. -Dspring.profiles.active=dev

You can also override some things at test time using @TestPropertySource

Ideally everything should be in source control so that there are no surprises e.g. How do you know what properties are sitting there in your server location, and which ones are missing? What happens if developers introduce new things?

Spring Boot is already giving you enough ways to do this right.

https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html

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C# – How to change the Page Title in ASP.Net 1.1

With ASP.Net 1.1, first you have to set the runat attribute on the title markup :

<title id="PageTitle" runat="server">WebForm1</title>

Then from the code behind :

// We need this name space to use HtmlGenericControl
using System.Web.UI.HtmlControls;

namespace TestWebApp
{

      public class WebForm1 : System.Web.UI.Page
      {
            // Variable declaration and instantiation
            protected HtmlGenericControl PageTitle = new HtmlGenericControl();

            private void Page_Load(object sender, System.EventArgs e)
            {
                  // Set new page title
                  PageTitle.InnerText = "New Page Title";
            }
      }
}

Imports System.Web.UI.HtmlControls

Namespace TestWebApp

    Public Class WebForm1
        Inherits System.Web.UI.Page

        Protected PageTitle As HtmlGenericControl = New HtmlGenericControl()

        Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)

            PageTitle.InnerText = "New Page Title"
        End Sub

...

    End Class
End Namespace

Java – Speed up Spring Boot startup time

Spring Boot does a lot of auto-configuration that may not be needed. So you may want to narrow down only auto-configuration that is needed for your app. To see full list of auto-configuration included, just run logging of org.springframework.boot.autoconfigure in DEBUG mode (logging.level.org.springframework.boot.autoconfigure=DEBUG in application.properties). Another option is to run spring boot application with --debug option: java -jar myproject-0.0.1-SNAPSHOT.jar --debug

There would be something like this in output:

=========================
AUTO-CONFIGURATION REPORT
=========================

Inspect this list and include only autoconfigurations you need:

@Configuration
@Import({
        DispatcherServletAutoConfiguration.class,
        EmbeddedServletContainerAutoConfiguration.class,
        ErrorMvcAutoConfiguration.class,
        HttpEncodingAutoConfiguration.class,
        HttpMessageConvertersAutoConfiguration.class,
        JacksonAutoConfiguration.class,
        ServerPropertiesAutoConfiguration.class,
        PropertyPlaceholderAutoConfiguration.class,
        ThymeleafAutoConfiguration.class,
        WebMvcAutoConfiguration.class,
        WebSocketAutoConfiguration.class,
})
public class SampleWebUiApplication {

Code was copied from this blog post.

Best Answer

Related Solutions

C# – How to change the Page Title in ASP.Net 1.1

Java – Speed up Spring Boot startup time

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