apollo-biz/src/main/java/com/ctrip/framework/apollo/biz/entity/ReleaseMessage.java/ReleaseMessage/prePersist
class ReleaseMessage:  @PrePersist
  protected void prePersist() {
    if (this.dataChangeLastModifiedTime == null) {
      dataChangeLastModifiedTime = new Date();
    }
  }