In application.properties you can define property server.port=8081.
The parameter formats supported by spring-cloud-starter-aws-parameter-store-config are:
/config/application/server.port/config/application_dev/server.port/config/my-service/server.port/config/my-service_dev/server.port
By defining the following properties in the bootstrap.properties you can change the format in some way:
spring.application.name=my-service
aws.paramstore.prefix=/config
aws.paramstore.defaultContext=application
aws.paramstore.profileSeparator=_
But only a simple customisations are supported because the main parameter naming logic is hardcode in the AwsParamStorePropertySourceLocator.
To dramatically change the parameter format you have to define a custom PropertySourceLocator and register it as bootstrap configuration.
The problem is that dev.application.server.port is invalid parameter name.
AWS Systems Manager Parameter Store uses / as a path separator and Spring uses the operation get-parameters-by-path.
A workaround is to use name dev.application/server.port.
But this name is invalid also.
Parameter name must be a fully qualified name, so the valid name is /dev.application/server.port.
To support such parameter format define a custom PropertySourceLocator
@Configuration
public class CustomAwsParamStorePropertySourceLocator implements PropertySourceLocator {
private static final Logger LOGGER =
LoggerFactory.getLogger(CustomAwsParamStorePropertySourceLocator.class);
private AWSSimpleSystemsManagement ssmClient;
private List<String> contexts = new ArrayList<>();
public CustomAwsParamStorePropertySourceLocator(AWSSimpleSystemsManagement ssmClient) {
this.ssmClient = ssmClient;
}
public List<String> getContexts() {
return contexts;
}
@Override
public PropertySource<?> locate(Environment environment) {
if (!(environment instanceof ConfigurableEnvironment)) {
return null;
}
ConfigurableEnvironment env = (ConfigurableEnvironment) environment;
List<String> profiles = Arrays.asList(env.getActiveProfiles());
String defaultAppName = "application";
this.contexts.add("/" + defaultAppName + "/");
addProfiles(this.contexts, defaultAppName, profiles);
String appName = env.getProperty("spring.application.name");
this.contexts.add("/" + appName + "/");
addProfiles(this.contexts, appName, profiles);
Collections.reverse(this.contexts);
CompositePropertySource composite = new CompositePropertySource("custom-aws-param-store");
for (String propertySourceContext : this.contexts) {
try {
composite.addPropertySource(create(propertySourceContext));
} catch (Exception e) {
LOGGER.warn("Unable to load AWS config from " + propertySourceContext, e);
}
}
return composite;
}
private void addProfiles(List<String> contexts, String appName, List<String> profiles) {
for (String profile : profiles) {
contexts.add("/" + profile + "." + appName + "/");
}
}
private AwsParamStorePropertySource create(String context) {
AwsParamStorePropertySource propertySource =
new AwsParamStorePropertySource(context, this.ssmClient);
propertySource.init();
return propertySource;
}
}
and register it in the bootstrap context by adding a file META-INF/spring.factories
org.springframework.cloud.bootstrap.BootstrapConfiguration=\
com.example.CustomAwsParamStorePropertySourceLocator
