How do I add things to the /info endpoint in spring boot programmatically? - spring-boot

Question

How do I add things to the /info endpoint in Spring Boot programmatically? The documentation states that this is possible for the /health endpoint through the use of HealthIndicator interface. Is there something for the /info endpoint as well?
I would like to add operating system name and version and other runtime info there.

Answer 1

In Spring Boot 1.4, you are able to declare InfoContributer beans to make this a whole lot easier:
#Component
public class ExampleInfoContributor implements InfoContributor {
#Override
public void contribute(Info.Builder builder) {
builder.withDetail("example",
Collections.singletonMap("key", "value"));
}
}
See http://docs.spring.io/spring-boot/docs/1.4.0.RELEASE/reference/htmlsingle/#production-ready-application-info-custom for more info.

Answer 2

The accepted answer actually clobbers the InfoEndpoint and does not add to it.
One way I found to add to the info is, in a #Configuration class, add an #Autowired method that adds extra properties following the info.* conventions to the environment. Then InfoEndpoint will pick them up when its invoked.
You can do something like the following:
#Autowired
public void setInfoProperties(ConfigurableEnvironment env) {
/* These properties will show up in the Spring Boot Actuator /info endpoint */
Properties props = new Properties();
props.put("info.timeZone", ZoneId.systemDefault().toString());
env.getPropertySources().addFirst(new PropertiesPropertySource("extra-info-props", props));
}

Answer 3

One way to do what you want (in the event that you have totally custom properties you need to display) is to declare a bean of type InfoEndpoint which will override the default.
#Bean
public InfoEndpoint infoEndpoint() {
final LinkedHashMap<String, Object> map = new LinkedHashMap<String, Object>();
map.put("test", "value"); //put whatever other values you need here
return new InfoEndpoint(map);
}
As you can see from the code above, the map can contain whatever info you need.
In the event that the data you want to show can be retrieved by the environment and is not custom, you do not need to override the InfoEndpoint bean, but you can simply add properties to the properties file with a prefix of info. One example where the OS name is evaluated is the following:
info.os = ${os.name}
In the code above, Spring Boot will evaluate the right-hand expression before returning the property in the /info endpoint.
A final note is that there is a ton of environment information that is already available in the /env endpoint
Update
As pointed out by #shabinjo, in newer Spring Boot versions there is no InfoEndpoint constructor that accepts a map.
You can however use the following snippet:
#Bean
public InfoEndpoint infoEndpoint() {
final Map<String, Object> map = new LinkedHashMap<String, Object>();
map.put("test", "value"); //put whatever other values you need here
return new InfoEndpoint(new MapInfoContributor(map));
}
The code above will completely override the default info that would end-up in /info.
To overcome this issue one could add the following bean
#Bean
public MapInfoContributor mapInfoContributor() {
return new MapInfoContributor(new HashMap<String, Object>() {{
put("test", "value");
}});
}

Answer 4

It should be possible to add a custom PropertySource inside an ApplicationListener to add custom info.* properties to the environment (see this answer for an example: How to Override Spring-boot application.properties programmatically)