INT-4051: Add PublisherAnnBPP when @EnableInt

JIRA: https://jira.spring.io/browse/INT-4051

Previously we can process `@Publisher` annotations only with the `<int:annotation-config>` or with an explicit `@EnablePublisher("")`

* Fix `PublisherRegistrar` to relax from the fact if we have `@EnablePublisher` or not and register `PublisherAnnotationBeanPostProcessor` without `defaultChannelName`

spring-integration-core/src/main/java/org/springframework/integration/aop/PublisherAnnotationBeanPostProcessor.java

@@ -82,7 +82,6 @@ public class PublisherAnnotationBeanPostProcessor extends ProxyConfig
 		return this.order;
 	}
 
-	@SuppressWarnings("deprecation")
 	@Override
 	public void afterPropertiesSet() {
 		this.advisor = new PublisherAnnotationAdvisor();

spring-integration-core/src/main/java/org/springframework/integration/config/PublisherRegistrar.java

@@ -28,6 +28,7 @@ import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
 import org.springframework.beans.factory.support.BeanDefinitionRegistry;
 import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
+import org.springframework.core.annotation.AnnotationUtils;
 import org.springframework.core.type.AnnotationMetadata;
 import org.springframework.integration.aop.PublisherAnnotationBeanPostProcessor;
 import org.springframework.integration.context.IntegrationContextUtils;
@@ -46,10 +47,10 @@ public class PublisherRegistrar implements ImportBeanDefinitionRegistrar {
 	public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) {
 		Map<String, Object> annotationAttributes =
 				importingClassMetadata.getAnnotationAttributes(EnablePublisher.class.getName());
-		if (annotationAttributes == null) {
+
-			return;
+		String value = (annotationAttributes == null
-		}
+				? (String) AnnotationUtils.getDefaultValue(EnablePublisher.class)
-		String value = (String) annotationAttributes.get("value");
+				: (String) annotationAttributes.get("value"));
 		if (!registry.containsBeanDefinition(IntegrationContextUtils.PUBLISHER_ANNOTATION_POSTPROCESSOR_NAME)) {
 			BeanDefinitionBuilder builder =
 					BeanDefinitionBuilder.genericBeanDefinition(PublisherAnnotationBeanPostProcessor.class)

spring-integration-core/src/test/java/org/springframework/integration/aggregator/BarrierMessageHandlerTests.java

@@ -48,6 +48,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.integration.annotation.Poller;
+import org.springframework.integration.annotation.Publisher;
 import org.springframework.integration.annotation.ServiceActivator;
 import org.springframework.integration.channel.DirectChannel;
 import org.springframework.integration.channel.QueueChannel;
@@ -60,6 +61,7 @@ import org.springframework.messaging.MessageChannel;
 import org.springframework.messaging.MessageHandler;
 import org.springframework.messaging.MessagingException;
 import org.springframework.messaging.PollableChannel;
+import org.springframework.messaging.handler.annotation.Payload;
 import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@@ -67,6 +69,7 @@ import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
 /**
  * @author Gary Russell
+ * @author Artem Bilan
  * @since 4.2
  *
  */
@@ -84,6 +87,9 @@ public class BarrierMessageHandlerTests {
 	@Autowired
 	private MessageChannel release;
 
+	@Autowired
+	private PollableChannel publisherChannel;
+
 	@Test
 	public void testRequestBeforeReply() throws Exception {
 		final BarrierMessageHandler handler = new BarrierMessageHandler(10000);
@@ -256,6 +262,10 @@ public class BarrierMessageHandlerTests {
 		Message<?> out = this.out.receive(10000);
 		assertNotNull(out);
 		assertEquals("[foo, bar]", out.getPayload().toString());
+
+		Message<?> publisherMessage = this.publisherChannel.receive(10000);
+		assertNotNull(publisherMessage);
+		assertEquals("BAR", publisherMessage.getPayload());
 	}
 
 	@Configuration
@@ -277,6 +287,11 @@ public class BarrierMessageHandlerTests {
 			return new QueueChannel();
 		}
 
+		@Bean
+		public PollableChannel publisherChannel() {
+			return new QueueChannel();
+		}
+
 		@ServiceActivator(inputChannel = "in")
 		@Bean
 		public BarrierMessageHandler barrier() {
@@ -291,6 +306,8 @@ public class BarrierMessageHandlerTests {
 			return new MessageHandler() {
 
 				@Override
+				@Publisher(channel = "publisherChannel")
+				@Payload("#args[0].payload.toUpperCase()")
 				public void handleMessage(Message<?> message) throws MessagingException {
 					barrier().trigger(message);
 				}