in local/twitter-userstream-elasticsearch/src/main/java/org/apache/streams/example/TwitterUserstreamElasticsearch.java [123:133]
public List<StreamsDatum> process(StreamsDatum entry) {
MatcherAssert.assertThat(entry.getDocument(), IsInstanceOf.instanceOf(Activity.class));
String id = entry.getId();
// replace delete with post in id
// ensure ElasticsearchPersistDeleter will remove original post if present
id = StringUtils.replace(id, "delete", "post");
entry.setId(id);
return Stream.of(entry).collect(Collectors.toList());
}