IndexModifier writer = null;
try {
writer = new IndexModifier(directory, new StandardAnalyzer(), true);
long newestDate = indexConversations(conversationIDs, externalMetaData,
writer, true);
writer.optimize();
// Done indexing so store a last modified date.
if (newestDate != -1) {
lastModified = newestDate;
indexProperties.setProperty("lastModified", Long.toString(lastModified));