Log startup time

application/src/main/java/org/thingsboard/server/ThingsboardServerApplication.java

@@ -15,24 +15,32 @@
  */
 package org.thingsboard.server;
 
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.SpringBootConfiguration;
 import org.springframework.context.annotation.ComponentScan;
+import org.springframework.core.Ordered;
 import org.springframework.scheduling.annotation.EnableAsync;
 import org.springframework.scheduling.annotation.EnableScheduling;
+import org.thingsboard.server.queue.util.AfterStartUp;
 
 import java.util.Arrays;
+import java.util.concurrent.TimeUnit;
 
 @SpringBootConfiguration
 @EnableAsync
 @EnableScheduling
 @ComponentScan({"org.thingsboard.server", "org.thingsboard.script"})
+@Slf4j
 public class ThingsboardServerApplication {
 
     private static final String SPRING_CONFIG_NAME_KEY = "--spring.config.name";
     private static final String DEFAULT_SPRING_CONFIG_PARAM = SPRING_CONFIG_NAME_KEY + "=" + "thingsboard";
 
+    private static long startTs;
+
     public static void main(String[] args) {
+        startTs = System.currentTimeMillis();
         SpringApplication.run(ThingsboardServerApplication.class, updateArguments(args));
     }
 
@@ -45,4 +53,11 @@ public class ThingsboardServerApplication {
         }
         return args;
     }
+
+    @AfterStartUp(order = Ordered.LOWEST_PRECEDENCE)
+    public void afterStartUp() {
+        long startupTimeMs = System.currentTimeMillis() - startTs;
+        log.info("Started ThingsBoard in {} seconds", TimeUnit.MILLISECONDS.toSeconds(startupTimeMs));
+    }
+
 }