When you think of streaming analytics, very likely Spark comes to mind. Even though Spark is a quasi-streaming offering, the Structured Streaming functionality introduced in Spark 2.0 is a big step up. You might also think about Storm, a true streaming solution that in version 1.0 is trying to buck its reputation for being hard to use.
Add Apache Apex, which debuted in June 2015, to your list of stream processing possibilities. Apex comes from DataTorrent and its impressive RTS platform, which includes a core processing engine; a suite of dashboarding, ingesting, and monitoring tools; and dtAssemble, a graphical flow-based programming system aimed at data scientists.
