Make ObjectMapper configurable in spring-messaging

Issue: SPR-11279

spring-messaging/src/main/java/org/springframework/messaging/converter/MappingJackson2MessageConverter.java

@@ -32,6 +32,7 @@ import com.fasterxml.jackson.databind.SerializationFeature;
 
 import org.springframework.messaging.Message;
 import org.springframework.messaging.MessageHeaders;
+import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
 import org.springframework.util.MimeType;
 
@@ -61,6 +62,30 @@ public class MappingJackson2MessageConverter extends AbstractMessageConverter {
 	}
 
 
+	/**
+	 * Set the {@code ObjectMapper} for this converter.
+	 * If not set, a default {@link ObjectMapper#ObjectMapper() ObjectMapper} is used.
+	 * <p>Setting a custom-configured {@code ObjectMapper} is one way to take further
+	 * control of the JSON serialization process. For example, an extended
+	 * {@link com.fasterxml.jackson.databind.ser.SerializerFactory} can be
+	 * configured that provides custom serializers for specific types. The other
+	 * option for refining the serialization process is to use Jackson's provided
+	 * annotations on the types to be serialized, in which case a custom-configured
+	 * ObjectMapper is unnecessary.
+	 */
+	public void setObjectMapper(ObjectMapper objectMapper) {
+		Assert.notNull(objectMapper, "ObjectMapper must not be null");
+		this.objectMapper = objectMapper;
+		configurePrettyPrint();
+	}
+
+	/**
+	 * Return the underlying {@code ObjectMapper} for this converter.
+	 */
+	public ObjectMapper getObjectMapper() {
+		return this.objectMapper;
+	}
+
 	/**
 	 * Whether to use the {@link DefaultPrettyPrinter} when writing JSON.
 	 * This is a shortcut for setting up an {@code ObjectMapper} as follows:

spring-web/src/main/java/org/springframework/http/converter/json/MappingJackson2HttpMessageConverter.java

@@ -85,11 +85,13 @@ public class MappingJackson2HttpMessageConverter extends AbstractHttpMessageConv
 	/**
 	 * Set the {@code ObjectMapper} for this view.
 	 * If not set, a default {@link ObjectMapper#ObjectMapper() ObjectMapper} is used.
-	 * <p>Setting a custom-configured {@code ObjectMapper} is one way to take further control of the JSON
-	 * serialization process. For example, an extended {@link org.codehaus.jackson.map.SerializerFactory}
-	 * can be configured that provides custom serializers for specific types. The other option for refining
-	 * the serialization process is to use Jackson's provided annotations on the types to be serialized,
-	 * in which case a custom-configured ObjectMapper is unnecessary.
+	 * <p>Setting a custom-configured {@code ObjectMapper} is one way to take further
+	 * control of the JSON serialization process. For example, an extended
+	 * {@link com.fasterxml.jackson.databind.ser.SerializerFactory}
+	 * can be configured that provides custom serializers for specific types.
+	 * The other option for refining the serialization process is to use Jackson's
+	 * provided annotations on the types to be serialized, in which case a
+	 * custom-configured ObjectMapper is unnecessary.
 	 */
 	public void setObjectMapper(ObjectMapper objectMapper) {
 		Assert.notNull(objectMapper, "ObjectMapper must not be null");