add new method that resolve message from any path you define it and for use you must inject bean in every class you want

Author: PouyaPouryaie

src/main/java/ir/bigz/springbootreal/configuration/LocaleConfig.java

@@ -4,11 +4,19 @@
 import org.springframework.context.MessageSource;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+import org.springframework.context.support.ReloadableResourceBundleMessageSource;
 import org.springframework.context.support.ResourceBundleMessageSource;
 import org.springframework.web.servlet.LocaleResolver;
 import org.springframework.web.servlet.i18n.AcceptHeaderLocaleResolver;
 
 import java.util.Locale;
+import java.util.Objects;
+
+/**
+ * you can define bean for message resource that it's read from specific path and inject bean in every class you want
+ * or use default messageResource bean that read from spring config define in application.properties file
+ */
 
 @Configuration
 public class LocaleConfig {
@@ -26,7 +34,21 @@ public LocaleResolver localeResolver() {
         return localResolver;
     }
 
+    @Bean("loadErrorMessageSource")
+    public ReloadableResourceBundleMessageSource errorCodeSourceDesc(){
+        return loadMessageSource("classpath:lang/error/code", 20, null);
+    }
+
+    public ReloadableResourceBundleMessageSource loadMessageSource(String path, Integer timeToCache, String defaultEncoding){
+        ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
+        messageSource.setBasename(path);
+        messageSource.setDefaultEncoding(Objects.isNull(defaultEncoding) ? encoding: defaultEncoding);
+        messageSource.setCacheSeconds(Objects.isNull(timeToCache) ? 10 : timeToCache);
+        return messageSource;
+    }
+
     @Bean
+    @Primary
     public MessageSource messageSource() {
         final ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
         messageSource.setBasename(basename);

src/main/java/ir/bigz/springbootreal/controller/SampleController.java

@@ -4,7 +4,10 @@
 import ir.bigz.springbootreal.service.UserService;
 import ir.bigz.springbootreal.viewmodel.UserModel;
 import ir.bigz.springbootreal.viewmodel.search.UserSearchDto;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.context.MessageSource;
+import org.springframework.context.support.ReloadableResourceBundleMessageSource;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Sort;
 import org.springframework.http.HttpStatus;
@@ -25,15 +28,25 @@ public class SampleController extends AbstractController{
 
     final MessageSource source;
 
+    @Autowired
+    @Qualifier("loadErrorMessageSource")
+    ReloadableResourceBundleMessageSource loadMessageSource;
+
     public SampleController(UserService userService, MessageSource source) {
         this.userService = userService;
         this.source = source;
     }
 
+    @GetMapping("/v1/geterror")
+    public ResponseEntity<?> getErrorMessage(
+            @RequestHeader(name = "Accept-Language", required = false) final Locale locale) {
+        return ResponseEntity.ok(loadMessageSource.getMessage("Exception", new Object[0], locale));
+    }
+
     @GetMapping("/v1/welcome")
     public ResponseEntity<?> getLocaleMessage(
             @RequestHeader(name = "Accept-Language", required = false) final Locale locale,
-            @RequestParam(name = "username", defaultValue = "Albert Xin", required = false) final String username) {
+            @RequestParam(name = "username", defaultValue = "Java Geek", required = false) final String username) {
         return ResponseEntity.ok(source.getMessage("welcome.message", new Object[]{username}, locale));
     }
 

src/main/resources/lang/error/code_en.properties

@@ -0,0 +1,3 @@
+Exception=Internal server Exception
+CommunicationException=Systems intercommunication problem
+GeneralBusinessException=Internal business exception occurred

src/main/resources/lang/error/code_fr.properties

@@ -0,0 +1,3 @@
+Exception=Exception de serveur interne
+CommunicationException=Problème d'intercommunication des systèmes
+GeneralBusinessException=Une exception commerciale interne s'est produite