Deprecate redundant APIs

This commit deprecates redundant APIs to simplify the way to
configure and use Spring Batch. The most notable changes are:

- JobLauncher is deprecated in favor of JobOperator
- JobExplorer is deprecated in favor of JobRepository
- CommandLineJobRunner is deprecated in favor of more
modern alternatives like Spring Boot's job Launcher

Other APIs that are only used in the newly deprecated APIs
have been deprecated as well.

Resolves #4847

Author: fmbenhassine

spring-batch-core/src/main/java/org/springframework/batch/core/launch/JobLauncher.java

@@ -34,8 +34,11 @@
  * @author Dave Syer
  * @author Taeik Lim
  * @author Mahmoud Ben Hassine
+ *
+ * @deprecated since 6.0 in favor of {@link JobOperator}. Scheduled for removal in 6.2 or later.
  */
 @FunctionalInterface
+@Deprecated(since = "6.0", forRemoval = true)
 public interface JobLauncher {
 
 	/**

spring-batch-core/src/main/java/org/springframework/batch/core/launch/support/CommandLineJobRunner.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2023 the original author or authors.
+ * Copyright 2006-2025 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.
@@ -41,12 +41,8 @@
 import org.springframework.batch.core.configuration.JobRegistry;
 import org.springframework.batch.core.converter.DefaultJobParametersConverter;
 import org.springframework.batch.core.converter.JobParametersConverter;
+import org.springframework.batch.core.launch.*;
 import org.springframework.batch.core.repository.explore.JobExplorer;
-import org.springframework.batch.core.launch.JobExecutionNotFailedException;
-import org.springframework.batch.core.launch.JobExecutionNotRunningException;
-import org.springframework.batch.core.launch.JobExecutionNotStoppedException;
-import org.springframework.batch.core.launch.JobLauncher;
-import org.springframework.batch.core.launch.NoSuchJobException;
 import org.springframework.batch.core.repository.JobRepository;
 import org.springframework.beans.factory.BeanDefinitionStoreException;
 import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
@@ -173,7 +169,10 @@
  * @author Mahmoud Ben Hassine
  * @author Minsoo Kim
  * @since 1.0
+ *
+ * @deprecated since 6.0 with no replacement. Scheduled for removal in 6.2 or later.
  */
+@Deprecated(since = "6.0", forRemoval = true)
 public class CommandLineJobRunner {
 
 	protected static final Log logger = LogFactory.getLog(CommandLineJobRunner.class);

spring-batch-core/src/main/java/org/springframework/batch/core/launch/support/JvmSystemExiter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2013 the original author or authors.
+ * Copyright 2006-2025 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.
@@ -24,7 +24,9 @@
  * @author Lucas Ward
  * @author Dave Syer
  *
+ * @deprecated since 6.0 with no replacement. Scheduled for removal in 6.2 or later.
  */
+@Deprecated(since = "6.0", forRemoval = true)
 public class JvmSystemExiter implements SystemExiter {
 
 	/**

spring-batch-core/src/main/java/org/springframework/batch/core/launch/support/RuntimeExceptionTranslator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2023 the original author or authors.
+ * Copyright 2006-2025 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.
@@ -20,8 +20,11 @@
 
 /**
  * @author Dave Syer
+ * @author Mahmoud Ben Hassine
  *
+ * @deprecated since 6.0 with no replacement, for removal in 6.2 or later.
  */
+@Deprecated(since = "6.0", forRemoval = true)
 public class RuntimeExceptionTranslator implements MethodInterceptor {
 
 	@Override

spring-batch-core/src/main/java/org/springframework/batch/core/launch/support/SystemExiter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2023 the original author or authors.
+ * Copyright 2006-2025 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.
@@ -22,7 +22,9 @@
  *
  * @author Lucas Ward
  *
+ * @deprecated since 6.0 with no replacement. Scheduled for removal in 6.2 or later.
  */
+@Deprecated(since = "6.0", forRemoval = true)
 public interface SystemExiter {
 
 	/**

spring-batch-core/src/main/java/org/springframework/batch/core/launch/support/TaskExecutorJobLauncher.java

@@ -65,7 +65,10 @@
  * @since 1.0
  * @see JobRepository
  * @see TaskExecutor
+ *
+ * @deprecated since 6.0 in favor of {@link TaskExecutorJobOperator}. Scheduled for removal in 6.2 or later.
  */
+@Deprecated(since = "6.0", forRemoval = true)
 public class TaskExecutorJobLauncher implements JobLauncher, InitializingBean {
 
 	protected static final Log logger = LogFactory.getLog(TaskExecutorJobLauncher.class);

spring-batch-core/src/main/java/org/springframework/batch/core/repository/explore/JobExplorer.java

@@ -24,6 +24,7 @@
 import org.springframework.batch.core.JobParameters;
 import org.springframework.batch.core.StepExecution;
 import org.springframework.batch.core.launch.NoSuchJobException;
+import org.springframework.batch.core.repository.JobRepository;
 import org.springframework.batch.item.ExecutionContext;
 import org.springframework.lang.Nullable;
 
@@ -38,7 +39,10 @@
  * @author Mahmoud Ben Hassine
  * @author Parikshit Dutta
  * @since 2.0
+ *
+ * @deprecated since 6.0 in favor of {@link JobRepository}. Scheduled for removal in 6.2 or later.
  */
+@Deprecated(since = "6.0", forRemoval = true)
 public interface JobExplorer {
 
 	/*

spring-batch-core/src/main/java/org/springframework/batch/core/repository/explore/support/AbstractJobExplorerFactoryBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2023 the original author or authors.
+ * Copyright 2006-2025 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.
@@ -43,7 +43,10 @@
  * @author Dave Syer
  * @author Mahmoud Ben Hassine
  * @since 2.0
+ *
+ * @deprecated since 6.0 with no replacement. Scheduled for removal in 6.2 or later.
  */
+@Deprecated(since = "6.0", forRemoval = true)
 public abstract class AbstractJobExplorerFactoryBean implements FactoryBean<JobExplorer>, InitializingBean {
 
 	private static final String TRANSACTION_ISOLATION_LEVEL_PREFIX = "ISOLATION_";

spring-batch-core/src/main/java/org/springframework/batch/core/repository/explore/support/JdbcJobExplorerFactoryBean.java

@@ -16,6 +16,7 @@
 
 package org.springframework.batch.core.repository.explore.support;
 
+import org.springframework.batch.core.repository.support.JdbcJobRepositoryFactoryBean;
 import org.springframework.beans.factory.FactoryBean;
 
 /**
@@ -25,9 +26,11 @@
  *
  * @author Dave Syer
  * @author Mahmoud Ben Hassine
- * @since 6.0
+ *
+ * @deprecated since 6.0 in favor of {@link JdbcJobRepositoryFactoryBean}. Scheduled for removal in 6.2 or later.
  */
 @SuppressWarnings("removal")
+@Deprecated(since = "6.0", forRemoval = true)
 public class JdbcJobExplorerFactoryBean extends JobExplorerFactoryBean {
 
 }

spring-batch-core/src/main/java/org/springframework/batch/core/repository/explore/support/JobExplorerFactoryBean.java

@@ -42,6 +42,7 @@
 import org.springframework.batch.core.repository.dao.JobExecutionDao;
 import org.springframework.batch.core.repository.dao.JobInstanceDao;
 import org.springframework.batch.core.repository.dao.StepExecutionDao;
+import org.springframework.batch.core.repository.support.JdbcJobRepositoryFactoryBean;
 import org.springframework.beans.factory.FactoryBean;
 import org.springframework.beans.factory.InitializingBean;
 import org.springframework.core.convert.support.ConfigurableConversionService;
@@ -61,8 +62,7 @@
  * @author Dave Syer
  * @author Mahmoud Ben Hassine
  * @since 2.0
- * @deprecated Since 6.0 and scheduled for removal in 6.2 in favor of using
- * {@link JdbcJobExplorerFactoryBean}.
+ * @deprecated since 6.0 in favor of {@link JdbcJobRepositoryFactoryBean}. Scheduled for removal in 6.2 or later.
  */
 @Deprecated(since = "6.0", forRemoval = true)
 public class JobExplorerFactoryBean extends AbstractJobExplorerFactoryBean implements InitializingBean {