Make RabbitTemplate exchange and routingKey configurable

See gh-10978

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/RabbitAutoConfiguration.java

@@ -188,6 +188,9 @@ public class RabbitAutoConfiguration {
 			if (templateProperties.getReplyTimeout() != null) {
 				rabbitTemplate.setReplyTimeout(templateProperties.getReplyTimeout());
 			}
+			rabbitTemplate.setExchange(templateProperties.getExchange());
+			rabbitTemplate.setRoutingKey(templateProperties.getRoutingKey());
+			rabbitTemplate.setChannelTransacted(templateProperties.isChannelTransacted());
 			return rabbitTemplate;
 		}
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/RabbitProperties.java

@@ -703,6 +703,21 @@ public class RabbitProperties {
 		 */
 		private Long replyTimeout;
 
+		/**
+		 * Name of the default exchange to use for send operations.
+		 */
+		private String exchange = "";
+
+		/**
+		 * Value of a default routing key to use for send operations.
+		 */
+		private String routingKey = "";
+
+		/**
+		 * Enable transactional channels.
+		 */
+		private boolean channelTransacted;
+
 		public Retry getRetry() {
 			return this.retry;
 		}
@@ -731,6 +746,30 @@ public class RabbitProperties {
 			this.replyTimeout = replyTimeout;
 		}
 
+		public String getExchange() {
+			return this.exchange;
+		}
+
+		public void setExchange(String exchange) {
+			this.exchange = exchange;
+		}
+
+		public String getRoutingKey() {
+			return this.routingKey;
+		}
+
+		public void setRoutingKey(String routingKey) {
+			this.routingKey = routingKey;
+		}
+
+		public boolean isChannelTransacted() {
+			return this.channelTransacted;
+		}
+
+		public void setChannelTransacted(boolean channelTransacted) {
+			this.channelTransacted = channelTransacted;
+		}
+
 	}
 
 	public static class Retry {

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/amqp/RabbitAutoConfigurationTests.java

@@ -103,6 +103,21 @@ public class RabbitAutoConfigurationTests {
 				});
 	}
 
+	@Test
+	public void testDefaultRabbitTemplateConfiguration() {
+		this.contextRunner.withUserConfiguration(TestConfiguration.class)
+				.run((context) -> {
+					RabbitTemplate rabbitTemplate = context.getBean(RabbitTemplate.class);
+					RabbitTemplate defaultRabbitTemplate = new RabbitTemplate();
+					assertThat(rabbitTemplate.getRoutingKey())
+							.isEqualTo(defaultRabbitTemplate.getRoutingKey());
+					assertThat(rabbitTemplate.getExchange())
+							.isEqualTo(defaultRabbitTemplate.getExchange());
+					assertThat(rabbitTemplate.isChannelTransacted())
+							.isEqualTo(defaultRabbitTemplate.isChannelTransacted());
+				});
+	}
+
 	@Test
 	public void testConnectionFactoryWithOverrides() {
 		this.contextRunner.withUserConfiguration(TestConfiguration.class)