added support for default values

account/src/main/java/de/muehlencord/shared/account/business/config/boundary/ConfigService.java

@@ -81,6 +81,28 @@ public class ConfigService implements Serializable {
         }
     }
 
+    public String getConfigValue(String configKey, String defaultValue) throws ConfigException {
+        return getConfigValue(configKey, defaultValue, false);
+    }
+
+    public String getConfigValue(String configKey, String defaultValue, boolean storeDefaultValue) throws ConfigException {
+        // get configValue as usual
+        String configValue = getConfigValue(configKey);
+        
+        // if config value is not found null has been returned
+        // in this case the value to return is the defaultValue
+        if (configValue == null) {
+            configValue = defaultValue;
+        }
+        
+        // check if the default value should be stored in the database
+        if (storeDefaultValue) {
+            updateConfigValue(configKey, null, configValue);
+        }
+        
+        return defaultValue;
+    }
+
     public String getConfigValue(String configKey, AccountEntity account) throws ConfigException {
         Query query = em.createNamedQuery("ConfigEntity.findByConfigKeyAndAccount");
         query.setParameter("configKey", configKey);
@@ -101,7 +123,7 @@ public class ConfigService implements Serializable {
     @Transactional
     @Lock(LockType.WRITE)
     public boolean updateConfigValue(String configKey, String accountName, String configValue) {
-        if ((configKey == null) || (configKey.equals ("")) || (configValue == null) || (configValue.equals (""))) {
+        if ((configKey == null) || (configKey.equals("")) || (configValue == null) || (configValue.equals(""))) {
             // null or empty key / values are not possible
             return false;
         }