in org.apache.aries.events.mongo/src/main/java/org/apache/aries/events/mongo/MessageSenderImpl.java [117:121]
private long oldestTimeStamp() {
try (MongoCursor<Document> docs = collection.find().sort(new Document(TIME_STAMP, 1)).iterator()) {
return docs.hasNext() ? docs.next().get(TIME_STAMP, Long.class) : 0L;
}
}