[vividus] Add Java 21 migration notice (#4809)

vividus/src/main/java/org/vividus/configuration/Vividus.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2023 the original author or authors.
+ * Copyright 2019-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,12 +16,22 @@
 
 package org.vividus.configuration;
 
+import java.time.Duration;
+import java.time.LocalDateTime;
+
+import org.apache.commons.lang3.JavaVersion;
+import org.apache.commons.lang3.SystemUtils;
+import org.slf4j.LoggerFactory;
 import org.vividus.log.LoggerConfigurer;
 import org.vividus.log.TestInfoLogger;
+import org.vividus.util.Sleeper;
 import org.vividus.util.json.JsonPathUtils;
 
 public final class Vividus
 {
+ // +2 months after planned migration to Java 21 in order to do not slow down old projects
+ private static final LocalDateTime JAVA_MIGRATION_NOTIFICATION_DATE = LocalDateTime.of(2024, 8, 1, 0, 0);
+
  private Vividus()
  {
  }
@@ -30,6 +40,7 @@ public static void init()
  {
  LoggerConfigurer.configureLoggers();
  TestInfoLogger.drawBanner();
+ checkJavaVersion();
  BeanFactory.open();
 
  // Load JsonPathUtils to configure JsonPath SPI
@@ -42,4 +53,26 @@ public static void init()
  throw new IllegalStateException(e);
  }
  }
+
+ private static void checkJavaVersion()
+ {
+ if (SystemUtils.isJavaVersionAtLeast(JavaVersion.JAVA_21))
+ {
+ return;
+ }
+
+ long daysAfterNotification = Duration.between(JAVA_MIGRATION_NOTIFICATION_DATE, LocalDateTime.now()).toDays();
+ long secondsToWait = daysAfterNotification > 0 ? daysAfterNotification : 0;
+ String lineSeparator = System.lineSeparator();
+ String separator = lineSeparator + "====================================================================";
+ String message = separator
+ + lineSeparator + " Java of version {} is used."
+ + lineSeparator + " VIVIDUS will require Java 21 starting from July 1, 2024,"
+ + lineSeparator + " you won't be able to run tests using current Java version."
+ + lineSeparator + " Please, upgrade to Java 21 at the earliest convenient time."
+ + lineSeparator + " Execution will resume in {}s."
+ + separator;
+ LoggerFactory.getLogger(Vividus.class).warn(message, SystemUtils.JAVA_VERSION, secondsToWait);
+ Sleeper.sleep(Duration.ofSeconds(secondsToWait));
+ }
 }