Add factory method to Reactive-/AuditingHandler.

By providing a factory method that accepts the MappingContext we can avoid the creation of additional support beans during the configuration phase for store modules implementing auditing.

See: #2593

Author: christophstrobl

src/main/java/org/springframework/data/auditing/AuditingHandler.java

@@ -19,9 +19,9 @@
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-
 import org.springframework.beans.factory.InitializingBean;
 import org.springframework.data.domain.AuditorAware;
+import org.springframework.data.mapping.context.MappingContext;
 import org.springframework.data.mapping.context.PersistentEntities;
 import org.springframework.util.Assert;
 
@@ -53,6 +53,16 @@ public AuditingHandler(PersistentEntities entities) {
 		this.auditorAware = Optional.empty();
 	}
 
+	/**
+	 * Factory method that creates a new {@link AuditingHandler} for the given {@link MappingContext}.
+	 *
+	 * @param mappingContext must not be {@literal null}.
+	 * @since 3.0
+	 */
+	public static AuditingHandler from(MappingContext<?, ?> mappingContext) {
+		return new AuditingHandler(PersistentEntities.of(mappingContext));
+	}
+
 	/**
 	 * Setter to inject a {@code AuditorAware} component to retrieve the current auditor.
 	 *

src/main/java/org/springframework/data/auditing/ReactiveAuditingHandler.java

@@ -18,6 +18,7 @@
 import reactor.core.publisher.Mono;
 
 import org.springframework.data.domain.ReactiveAuditorAware;
+import org.springframework.data.mapping.context.MappingContext;
 import org.springframework.data.mapping.context.PersistentEntities;
 import org.springframework.util.Assert;
 
@@ -42,6 +43,16 @@ public ReactiveAuditingHandler(PersistentEntities entities) {
 		super(entities);
 	}
 
+	/**
+	 * Factory method that creates a new {@link ReactiveAuditingHandler} for the given {@link MappingContext}.
+	 *
+	 * @param mappingContext must not be {@literal null}.
+	 * @since 3.0
+	 */
+	public static ReactiveAuditingHandler from(MappingContext<?, ?> mappingContext) {
+		return new ReactiveAuditingHandler(PersistentEntities.of(mappingContext));
+	}
+
 	/**
 	 * Setter to inject a {@link ReactiveAuditorAware} component to retrieve the current auditor.
 	 *