How to use

MetadataPayload

in

co.cask.cdap.proto.audit.payload.metadata

 /**
  * Build the metadata payload using the previous value, additions and deletions.
  *
  * @return the metadata payload built
  */
 public MetadataPayload build() {
  return new MetadataPayload(previous, additions, deletions);
 }
}

private int addAllSystemMetadata(Set<String> allMetadata) {
 for (AuditMessage auditMessage : getMetadataUpdateMessages()) {
  AuditPayload payload = auditMessage.getPayload();
  Assert.assertTrue(payload instanceof MetadataPayload);
  MetadataPayload metadataPayload = (MetadataPayload) payload;
  Map<MetadataScope, Metadata> additions = metadataPayload.getAdditions();
  if (additions.containsKey(MetadataScope.SYSTEM)) {
   allMetadata.addAll(additions.get(MetadataScope.SYSTEM).getProperties().keySet());
   allMetadata.addAll(additions.get(MetadataScope.SYSTEM).getTags());
  }
  Map<MetadataScope, Metadata> deletions = metadataPayload.getDeletions();
  if (deletions.containsKey(MetadataScope.SYSTEM)) {
   allMetadata.addAll(deletions.get(MetadataScope.SYSTEM).getProperties().keySet());
   allMetadata.addAll(deletions.get(MetadataScope.SYSTEM).getTags());
  }
 }
 return allMetadata.size();
}

 /**
  * Build the metadata payload using the previous value, additions and deletions.
  *
  * @return the metadata payload built
  */
 public MetadataPayload build() {
  return new MetadataPayload(previous, additions, deletions);
 }
}