process jpa properties set as env variables (hapifhir#808)

* process jpa properties set as env variables

* Update src/main/java/ca/uhn/fhir/jpa/starter/util/EnvironmentHelper.java

Co-authored-by: Copilot <[email protected]>

---------

Co-authored-by: Jens Kristian Villadsen <[email protected]>
Co-authored-by: Copilot <[email protected]>

Author: 3 people

src/main/java/ca/uhn/fhir/jpa/starter/util/EnvironmentHelper.java

@@ -40,6 +40,19 @@ public static Properties getHibernateProperties(
 			properties.put(strippedKey, entry.getValue().toString());
 		}
 
+		// also check for JPA properties set as environment variables, this is slightly hacky and doesn't cover all
+		// the naming conventions Springboot allows
+		// but there doesn't seem to be a better/deterministic way to get these properties when they are set as ENV
+		// variables and this at least provides
+		// a way to set them (in a docker container, for instance)
+		Map<String, Object> jpaPropsEnv = getPropertiesStartingWith(environment, "SPRING_JPA_PROPERTIES");
+		for (Map.Entry<String, Object> entry : jpaPropsEnv.entrySet()) {
+			String strippedKey = entry.getKey().replace("SPRING_JPA_PROPERTIES_", "");
+			strippedKey = strippedKey.replaceAll("_", ".");
+			strippedKey = strippedKey.toLowerCase();
+			properties.put(strippedKey, entry.getValue().toString());
+		}
+
 		// Spring Boot Autoconfiguration defaults
 		properties.putIfAbsent(AvailableSettings.SCANNER, "org.hibernate.boot.archive.scan.internal.DisabledScanner");
 		properties.putIfAbsent(