Merge pull request #42341 from nosan

* pr/42341:
  Polish "Add option for configuring max messages per task"
  Add option for configuring max messages per task

Closes gh-42341

Author: snicoll

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jms/DefaultJmsListenerContainerFactoryConfigurer.java

@@ -135,6 +135,7 @@ public void configure(DefaultJmsListenerContainerFactory factory, ConnectionFact
 		map.from(listenerProperties::isAutoStartup).to(factory::setAutoStartup);
 		map.from(listenerProperties::formatConcurrency).to(factory::setConcurrency);
 		map.from(listenerProperties::getReceiveTimeout).as(Duration::toMillis).to(factory::setReceiveTimeout);
+		map.from(listenerProperties::getMaxMessagesPerTask).to(factory::setMaxMessagesPerTask);
 	}
 
 }

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jms/JmsProperties.java

@@ -186,6 +186,13 @@ public static class Listener {
 		 */
 		private Duration receiveTimeout = Duration.ofSeconds(1);
 
+		/**
+		 * Specify the maximum number of messages to process in one task. By default,
+		 * unlimited unless a SchedulingTaskExecutor is configured on the listener (10
+		 * messages), as it indicates a preference for short-lived tasks.
+		 */
+		private Integer maxMessagesPerTask;
+
 		private final Session session = new Session();
 
 		public boolean isAutoStartup() {
@@ -250,6 +257,14 @@ public void setReceiveTimeout(Duration receiveTimeout) {
 			this.receiveTimeout = receiveTimeout;
 		}
 
+		public Integer getMaxMessagesPerTask() {
+			return this.maxMessagesPerTask;
+		}
+
+		public void setMaxMessagesPerTask(Integer maxMessagesPerTask) {
+			this.maxMessagesPerTask = maxMessagesPerTask;
+		}
+
 		public Session getSession() {
 			return this.session;
 		}

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jms/JmsAutoConfigurationTests.java

@@ -176,7 +176,8 @@ void testJmsListenerContainerFactoryWithCustomSettings() {
 					"spring.jms.listener.session.acknowledgeMode=client",
 					"spring.jms.listener.session.transacted=false", "spring.jms.listener.minConcurrency=2",
 					"spring.jms.listener.receiveTimeout=2s", "spring.jms.listener.maxConcurrency=10",
-					"spring.jms.subscription-durable=true", "spring.jms.client-id=exampleId")
+					"spring.jms.subscription-durable=true", "spring.jms.client-id=exampleId",
+					"spring.jms.listener.max-messages-per-task=5")
 			.run(this::testJmsListenerContainerFactoryWithCustomSettings);
 	}
 
@@ -188,6 +189,7 @@ private void testJmsListenerContainerFactoryWithCustomSettings(AssertableApplica
 		assertThat(container.getConcurrentConsumers()).isEqualTo(2);
 		assertThat(container.getMaxConcurrentConsumers()).isEqualTo(10);
 		assertThat(container).hasFieldOrPropertyWithValue("receiveTimeout", 2000L);
+		assertThat(container).hasFieldOrPropertyWithValue("maxMessagesPerTask", 5);
 		assertThat(container.isSubscriptionDurable()).isTrue();
 		assertThat(container.getClientId()).isEqualTo("exampleId");
 	}