Author: cziegeler
Date: Mon Aug 25 15:05:46 2014
New Revision: 1620334
URL: http://svn.apache.org/r1620334
Log:
SLING-3881 : Provide a helper method to batch delete resources
Modified:
sling/trunk/bundles/api/src/main/java/org/apache/sling/api/resource/ResourceUtil.java
Modified:
sling/trunk/bundles/api/src/main/java/org/apache/sling/api/resource/ResourceUtil.java
URL:
http://svn.apache.org/viewvc/sling/trunk/bundles/api/src/main/java/org/apache/sling/api/resource/ResourceUtil.java?rev=1620334&r1=1620333&r2=1620334&view=diff
==============================================================================
---
sling/trunk/bundles/api/src/main/java/org/apache/sling/api/resource/ResourceUtil.java
(original)
+++
sling/trunk/bundles/api/src/main/java/org/apache/sling/api/resource/ResourceUtil.java
Mon Aug 25 15:05:46 2014
@@ -641,4 +641,53 @@ public class ResourceUtil {
}
return result;
}
+
+ /**
+ * A batch resource remover deletes resources in batches. Once the batch
+ * size (threshold) is reached, an intermediate commit is performed.
Resource
+ * trees are deleted resource by resource starting with the deepest
children first.
+ * Once all resources have been passed to the batch resource remover, a
final
+ * commit needs to be called on the resource resolver.
+ * @since 2.6
+ */
+ public static class BatchResourceRemover {
+
+ private final int max;
+
+ private int count;
+
+ public BatchResourceRemover(final int batchSize) {
+ this.max = (batchSize < 1 ? 50 : batchSize);
+ }
+
+ public void delete(final Resource rsrc)
+ throws PersistenceException {
+ final ResourceResolver resolver = rsrc.getResourceResolver();
+ for(final Resource child : rsrc.getChildren()) {
+ delete(child);
+ }
+ resolver.delete(rsrc);
+ count++;
+ if ( count >= max ) {
+ resolver.commit();
+ count = 0;
+ }
+ }
+ }
+
+ /**
+ * Create a batch resource remover.
+ * A batch resource remove can be used to delete resources in batches.
+ * Once the passed in threshold of deleted resources is reached, an
intermediate
+ * commit is called on the resource resolver. In addition the batch remover
+ * deletes a resource recursively.
+ * Once all resources to delete are passed to the remover, a final commit
needs
+ * to be call on the resource resolver.
+ * @param threshold The threshold for the intermediate saves.
+ * @return A new batch resource remover.
+ * Since 2.6
+ */
+ public static BatchResourceRemover getBatchResourceResourceRemover(final
int threshold) {
+ return new BatchResourceRemover(threshold);
+ }
}
