Deprecate throttle limit in TaskExecutorRepeatTemplate

Resolves #2218

Author: fmbenhassine

spring-batch-core/src/main/java/org/springframework/batch/core/step/builder/AbstractTaskletStepBuilder.java

@@ -199,7 +199,11 @@ public B taskExecutor(TaskExecutor taskExecutor) {
 	 * in the job repository for this step.
 	 * @param throttleLimit maximum number of concurrent tasklet executions allowed
 	 * @return this for fluent chaining
+	 * @deprecated since 5.0, scheduled for removal in 6.0. Use a pooled
+	 * {@link TaskExecutor} implemenation with a limited capacity of its task queue
+	 * instead.
 	 */
+	@Deprecated(since = "5.0", forRemoval = true)
 	public B throttleLimit(int throttleLimit) {
 		this.throttleLimit = throttleLimit;
 		return self();
@@ -280,6 +284,7 @@ protected TaskExecutor getTaskExecutor() {
 		return taskExecutor;
 	}
 
+	@Deprecated(since = "5.0", forRemoval = true)
 	protected int getThrottleLimit() {
 		return throttleLimit;
 	}

spring-batch-infrastructure/src/main/java/org/springframework/batch/repeat/support/TaskExecutorRepeatTemplate.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2007 the original author or authors.
+ * Copyright 2006-2022 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.
@@ -43,6 +43,7 @@
  * any given time, and each thread would have its own transaction).<br>
  *
  * @author Dave Syer
+ * @author Mahmoud Ben Hassine
  *
  */
 public class TaskExecutorRepeatTemplate extends RepeatTemplate {
@@ -68,7 +69,11 @@ public class TaskExecutorRepeatTemplate extends RepeatTemplate {
 	 * being reached (so make the core pool size larger than the throttle limit if
 	 * possible).
 	 * @param throttleLimit the throttleLimit to set.
+	 * @deprecated since 5.0, scheduled for removal in 6.0. Use a pooled
+	 * {@link TaskExecutor} implemenation with a limited capacity of its task queue
+	 * instead.
 	 */
+	@Deprecated(since = "5.0", forRemoval = true)
 	public void setThrottleLimit(int throttleLimit) {
 		this.throttleLimit = throttleLimit;
 	}