Updated graceful shutdown sample by removing deprecated code

Resolves #3901

Author: parikshitdutta

spring-batch-samples/src/test/java/org/springframework/batch/sample/GracefulShutdownFunctionalTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2007 the original author or authors.
+ * Copyright 2006-2021 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.
@@ -28,16 +28,18 @@
 import org.springframework.batch.core.JobExecution;
 import org.springframework.batch.core.JobParameters;
 import org.springframework.batch.core.JobParametersBuilder;
+import org.springframework.batch.core.launch.JobOperator;
 import org.springframework.batch.test.JobLauncherTestUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
 /**
  * Functional test for graceful shutdown. A batch container is started in a new
- * thread, then it's stopped using {@link JobExecution#stop()}.
+ * thread, then it's stopped using {@link JobOperator#stop(long)}.
  * 
  * @author Lucas Ward
+ * @author Parikshit Dutta
  * 
  */
 @RunWith(SpringJUnit4ClassRunner.class)
@@ -50,6 +52,9 @@ public class GracefulShutdownFunctionalTests {
 	@Autowired
 	private JobLauncherTestUtils jobLauncherTestUtils;
 
+	@Autowired
+	private JobOperator jobOperator;
+
 	@Test
 	public void testLaunchJob() throws Exception {
 
@@ -63,7 +68,7 @@ public void testLaunchJob() throws Exception {
 		assertEquals(BatchStatus.STARTED, jobExecution.getStatus());
 		assertTrue(jobExecution.isRunning());
 
-		jobExecution.stop();
+		jobOperator.stop(jobExecution.getId());
 
 		int count = 0;
 		while (jobExecution.isRunning() && count <= 10) {
@@ -74,7 +79,5 @@ public void testLaunchJob() throws Exception {
 
 		assertFalse("Timed out waiting for job to end.", jobExecution.isRunning());
 		assertEquals(BatchStatus.STOPPED, jobExecution.getStatus());
-
 	}
-
 }