Added notifications system

src/main/java/site/easystartup/web/config/WebSocketConfig.java

@@ -0,0 +1,46 @@
+package site.easystartup.web.config;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.messaging.converter.DefaultContentTypeResolver;
+import org.springframework.messaging.converter.MappingJackson2MessageConverter;
+import org.springframework.messaging.converter.MessageConverter;
+import org.springframework.messaging.simp.config.MessageBrokerRegistry;
+import org.springframework.util.MimeTypeUtils;
+import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
+import org.springframework.web.socket.config.annotation.StompEndpointRegistry;
+import org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurer;
+
+import java.util.List;
+
+@Configuration
+@EnableWebSocketMessageBroker
+public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {
+
+    @Override
+    public void configureMessageBroker(MessageBrokerRegistry config) {
+        config.enableSimpleBroker( "/user", "/queue");
+        config.setApplicationDestinationPrefixes("/app");
+        config.setUserDestinationPrefix("/user");
+    }
+
+    @Override
+    public void registerStompEndpoints(StompEndpointRegistry registry) {
+        registry
+                .addEndpoint("/ws")
+                .setAllowedOrigins("*")
+                .withSockJS();
+    }
+
+    @Override
+    public boolean configureMessageConverters(List<MessageConverter> messageConverters) {
+        DefaultContentTypeResolver resolver = new DefaultContentTypeResolver();
+        resolver.setDefaultMimeType(MimeTypeUtils.APPLICATION_JSON);
+        MappingJackson2MessageConverter converter = new MappingJackson2MessageConverter();
+        converter.setObjectMapper(new ObjectMapper());
+        converter.setContentTypeResolver(resolver);
+        messageConverters.add(converter);
+        return false;
+    }
+}
+