code: @Test public void should_persist_and_find() throws Exception {
    Long userId=RandomUtils.nextLong();
    UUID tweetId=UUIDGen.getTimeUUID();
    Date creationDate=new Date();
    ClusteredTweetId id=new ClusteredTweetId(userId,tweetId,creationDate);
    ClusteredTweetEntity tweet=new ClusteredTweetEntity(id,"this is a tweet",userId,false);
    manager.persist(tweet);
    ClusteredTweetEntity found=manager.find(ClusteredTweetEntity.class,id);
    assertThat(found.getContent()).isEqualTo("this is a tweet");
    assertThat(found.getOriginalAuthorId()).isEqualTo(userId);
    assertThat(found.getIsARetweet()).isFalse();
  }
  