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Stream Processing with Hazelcast Jet - Voxxed Days Thessaloniki 19.11.2018
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Talk I gave at the Voxxed Days Thessaloniki 2018 conference
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Stream Processing with Hazelcast Jet - Voxxed Days Thessaloniki 19.11.2018
1.
1 Stream Processing with Hazelcast
Jet Rafał Leszko @RafalLeszko
2.
© 2018 Hazelcast
Inc. Confidential & Proprietary Agenda ● Introduction to Jet ○ What is Hazelcast? ○ What is Stream Processing and Hazelcast Jet? ○ Example 1: Word Count ● Jet Under the Hood ○ How does it work? ○ Infinite Streams ○ Example 2: Twitter Cryptocurrency Analysis ● Jet Features & Use Cases ○ Jet Features ○ Why would I need it? ○ Example 3: Web Crawler
3.
© 2018 Hazelcast
Inc. Confidential & Proprietary Introduction to Jet
4.
© 2018 Hazelcast
Inc. Confidential & Proprietary What is Hazelcast?
5.
© 2018 Hazelcast
Inc. Confidential & Proprietary What is Hazelcast? Products:
6.
© 2018 Hazelcast
Inc. Confidential & Proprietary What is Hazelcast? Products:
7.
© 2018 Hazelcast
Inc. Confidential & Proprietary What is Hazelcast? Products: My Role: ● Cloud Software Engineer
8.
© 2018 Hazelcast
Inc. Confidential & Proprietary What is Hazelcast Jet?
9.
© 2018 Hazelcast
Inc. Confidential & Proprietary What is Hazelcast Jet? DAG - Direct Acyclic Graph
10.
© 2018 Hazelcast
Inc. Confidential & Proprietary What is Hazelcast Jet?
11.
© 2018 Hazelcast
Inc. Confidential & Proprietary What is Hazelcast Jet?
12.
© 2018 Hazelcast
Inc. Confidential & Proprietary Example 1: Word Count Problem: Count the number of occurrences of each word in the given text. Sample Input: Lorem ipsum dolor, dolor. Sample Output: lorem=1 ipsum=1 dolor=2
13.
© 2018 Hazelcast
Inc. Confidential & Proprietary Pure Java Pattern delimiter = Pattern.compile("W+"); return lines.entrySet().stream() .map(e -> e.getValue().toLowerCase()) .flatMap(t -> Arrays.stream(delimiter.split(t))) .filter(word -> !word.isEmpty()) .collect( groupingBy( identity(), counting())); Example 1: Word Count
14.
© 2018 Hazelcast
Inc. Confidential & Proprietary Example 1: Word Count
15.
© 2018 Hazelcast
Inc. Confidential & Proprietary Example 1: Word Count
16.
© 2018 Hazelcast
Inc. Confidential & Proprietary Example 1: Word Count
17.
© 2018 Hazelcast
Inc. Confidential & Proprietary Example 1: Word Count
18.
© 2018 Hazelcast
Inc. Confidential & Proprietary Example 1: Word Count
19.
© 2018 Hazelcast
Inc. Confidential & Proprietary Example 1: Word Count Hazelcast Jet Pattern delimiter = Pattern.compile("W+"); Pipeline pipeline = Pipeline.create(); pipeline.drawFrom(Sources.<Long, String>map(LINES)) .map(e -> e.getValue().toLowerCase()) .flatMap(t -> traverseArray(delimiter.split(t))) .filter(word -> !word.isEmpty()) .groupingKey(wholeItem()) .aggregate(counting()) .drainTo(Sinks.map(COUNTS)); return pipeline;
20.
© 2018 Hazelcast
Inc. Confidential & Proprietary Example 1: Word Count Pure Java Pattern delimiter = Pattern.compile("W+"); return lines.entrySet().stream() .map(e -> e.getValue().toLowerCase()) .flatMap(t -> Arrays.stream(delimiter.split(t))) .filter(word -> !word.isEmpty()) .collect( groupingBy( identity(), counting()));
21.
© 2018 Hazelcast
Inc. Confidential & Proprietary Example 1: Word Count Hazelcast Jet Pattern delimiter = Pattern.compile("W+"); Pipeline pipeline = Pipeline.create(); pipeline.drawFrom(Sources.<Long, String>map(LINES)) .map(e -> e.getValue().toLowerCase()) .flatMap(t -> traverseArray(delimiter.split(t))) .filter(word -> !word.isEmpty()) .groupingKey(wholeItem()) .aggregate(counting()) .drainTo(Sinks.map(COUNTS)); return pipeline;
22.
© 2018 Hazelcast
Inc. Confidential & Proprietary Example 1: Word Count
23.
© 2018 Hazelcast
Inc. Confidential & Proprietary Example 1: Word Count
24.
© 2018 Hazelcast
Inc. Confidential & Proprietary Example 1: Word Count Demo: https://github.com/hazelcast/hazelcast-jet-code-samples
25.
© 2018 Hazelcast
Inc. Confidential & Proprietary Jet Under the Hood
26.
© 2018 Hazelcast
Inc. Confidential & Proprietary How does it work?
27.
© 2018 Hazelcast
Inc. Confidential & Proprietary How does it work?
28.
© 2018 Hazelcast
Inc. Confidential & Proprietary How does it work?
29.
© 2018 Hazelcast
Inc. Confidential & Proprietary How does it work? Under the Hood: ● Generate DAG representation from Pipeline ● Serialize DAG ● Send DAG to every Node ● Deserialize DAG ● Executes DAG on each Node
30.
© 2018 Hazelcast
Inc. Confidential & Proprietary Infinite Streams
31.
© 2018 Hazelcast
Inc. Confidential & Proprietary Infinite Streams Examples: ● Currency Exchange Rates ● Tweets from Twitter ● Events in some Event-Based system ● ...
32.
© 2018 Hazelcast
Inc. Confidential & Proprietary Infinite Streams Windowing pipeline.drawFrom(...) .addTimestamps() .window(sliding(30_000, 10_000))
33.
© 2018 Hazelcast
Inc. Confidential & Proprietary Example 2: Twitter Cryptocurrency Analysis Problem: Present in real-time the sentiments about cryptocurrencies Input: Tweets are streamed from Twitter and categorized by coin type (BTC, ETC, XRP, etc) Output: Tweets sentiments (last 30 sec, last minute, last 5 minutes)
34.
© 2018 Hazelcast
Inc. Confidential & Proprietary Example 2: Twitter Cryptocurrency Analysis Demo: https://jet.hazelcast.org/demos/
35.
© 2018 Hazelcast
Inc. Confidential & Proprietary Jet Features & Use Cases
36.
© 2018 Hazelcast
Inc. Confidential & Proprietary Jet Features Categories of Features ● Easy to Use ● Performance
37.
© 2018 Hazelcast
Inc. Confidential & Proprietary Jet Features: Performance
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© 2018 Hazelcast
Inc. Confidential & Proprietary Jet Features: Performance
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© 2018 Hazelcast
Inc. Confidential & Proprietary Jet Features: other features
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© 2018 Hazelcast
Inc. Confidential & Proprietary Jet Features: discovery
41.
© 2018 Hazelcast
Inc. Confidential & Proprietary Why would I need it?
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© 2018 Hazelcast
Inc. Confidential & Proprietary Why would I need it? ● Big Data Projects
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© 2018 Hazelcast
Inc. Confidential & Proprietary Why would I need it? ● Big Data Projects ● Speed up Everything
44.
© 2018 Hazelcast
Inc. Confidential & Proprietary Why would I need it? ● Big Data Projects ● Speed up Everything
45.
© 2018 Hazelcast
Inc. Confidential & Proprietary Example 3: Web Crawler Problem: Parse all blog posts from the webpage Input: URL of Blog Trips Output: All the content from the Blog
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© 2018 Hazelcast
Inc. Confidential & Proprietary Example 3: Web Crawler Demo: https://github.com/leszko/geodump
47.
© 2018 Hazelcast
Inc. Confidential & Proprietary Thank You!
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