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Reactive Applications on Apache Tomcat and Servlet 3.1 containers

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The document presents an overview of reactive applications using Apache Tomcat and Servlet 3.1 containers, focusing on asynchronous and non-blocking processing. It discusses the implementation of reactive streams, detailing the roles of publisher, subscriber, and subscription within an application. The content is aimed at demonstrating the advantages and techniques for building responsive systems in a web environment.

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Reactive Applications on Apache Tomcat and Servlet 3.1 Containers Violeta Georgieva @violeta_g_g 1
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Violeta Georgieva • Pivotal • Tomcat committer • RM for Tomcat7/8.0 • Spring Framework contributor • Reactor Netty committer 2
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ 3
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Use Cases 4
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Use Cases 5
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Use Cases 6 Network Latency
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Use Cases 7 Processing Latency
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Demo - Blocking 8 ∞ Stock Quotes Trading Service Load Generator Browser
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Synchronous Processing/Blocking 9 Client App A App B
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Synchronous Processing/Blocking 10 Client App A App B
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Asynchronous Processing/Blocking 11 Client App A App BThread Pool
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Asynchronous Processing/Blocking 12 Client App A App BThread Pool
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Asynchronous Processing/Blocking 13 Client App A App BThread Pool
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Asynchronous Processing/Non-Blocking Read 14 Container App
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Asynchronous Processing/Non-Blocking Read 15 Container App onDataAvailable
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Asynchronous Processing/Non-Blocking Read 16 Container App onDataAvailable read isReady?
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Asynchronous Processing/Non-Blocking Read 17 Container App onDataAvailable read isReady? read isReady? false
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Asynchronous Processing/Non-Blocking Read 18 Container App onDataAvailable read isReady? read isReady? false onDataAvailable
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Asynchronous Processing/Non-Blocking Write 19 Container App
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Asynchronous Processing/Non-Blocking Write 20 Container App onWritePossible
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Asynchronous Processing/Non-Blocking Write 21 Container App onWritePossible write isReady?
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Asynchronous Processing/Non-Blocking Write 22 Container App onWritePossible write isReady? write isReady? false
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Asynchronous Processing/Non-Blocking Write 23 Container App onWritePossible write isReady? write isReady? false onWritePossible
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Reactive Streams • Publisher • Subscriber • Subscription • Processor 24
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Reactive Streams 25 Publisher Subscriber subscribe onSubscribe
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Reactive Streams 26 Publisher Subscriber subscribe onSubscribe request(2)
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Reactive Streams 27 Publisher Subscriber subscribe onSubscribe request(2) onNext onNext
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Reactive Streams 28 Publisher Subscriber subscribe onSubscribe request(2) onNext onNext request(1)
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Reactive Streams 29 Publisher Subscriber subscribe onSubscribe request(2) onNext onNext request(1) onNext
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Read 30 Container Read Listener Read Publisher App
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Read 31 Container Read Listener Read Publisher App onSubscribe subscribe
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Read 32 Container Read Listener Read Publisher App onSubscribe subscribe request
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Read 33 Container Read Listener Read Publisher App onSubscribe subscribe requestisReady? read onNext(data)
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Read 34 Container Read Listener Read Publisher App onSubscribe subscribe requestisReady? read onNext(data) request
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Read 35 Container Read Listener Read Publisher App onSubscribe subscribe requestisReady? read onNext(data) requestisReady? false
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Read 36 Container Read Listener Read Publisher App onSubscribe subscribe requestisReady? read onNext(data) requestisReady? false onDataAvailabl e onDataAvailabl e
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Read 37 Container Read Listener Read Publisher App onSubscribe subscribe requestisReady? read onNext(data) requestisReady? false onDataAvailabl e onDataAvailabl e onNext(data) read
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Write 38 Container Write Listener Write Subscriber App
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Write 39 Container Write Listener Write Subscriber App subscribe onSubscribe
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Write 40 Container Write Listener Write Subscriber App subscribe onSubscribe request
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Write 41 Container Write Listener Write Subscriber App subscribe onSubscribe request isReady? write onNext(data)
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Write 42 Container Write Listener Write Subscriber App subscribe onSubscribe request isReady? write onNext(data) request
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Write 43 Container Write Listener Write Subscriber App subscribe onSubscribe request isReady? write onNext(data) request isReady? false onNext(data)
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Write 44 Container Write Listener Write Subscriber App subscribe onSubscribe request isReady? write onNext(data) request isReady? false onNext(data) onWritePossible onWritePossible
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Write 45 Container Write Listener Write Subscriber App subscribe onSubscribe request isReady? write onNext(data) request isReady? false onNext(data) onWritePossible onWritePossible write request
Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Demo – Non Blocking 46 Load Generator ∞ Stock Quotes Trading Service Browser
Thank You http://github.com/violetagg/s1p2017-demo 47 #springone@s1p

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Reactive Applications on Apache Tomcat and Servlet 3.1 containers

  • 1. Reactive Applications on Apache Tomcat and Servlet 3.1 Containers Violeta Georgieva @violeta_g_g 1
  • 2. Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Violeta Georgieva • Pivotal • Tomcat committer • RM for Tomcat7/8.0 • Spring Framework contributor • Reactor Netty committer 2
  • 3. Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ 3
  • 4. Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Use Cases 4
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  • 6. Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Use Cases 6 Network Latency
  • 7. Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Use Cases 7 Processing Latency
  • 8. Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Demo - Blocking 8 ∞ Stock Quotes Trading Service Load Generator Browser
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  • 45. Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Servlet 3.1/Reactive Streams Bridge - Write 45 Container Write Listener Write Subscriber App subscribe onSubscribe request isReady? write onNext(data) request isReady? false onNext(data) onWritePossible onWritePossible write request
  • 46. Unless otherwise indicated, these slides are © 2013 -2017 Piv otal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Demo – Non Blocking 46 Load Generator ∞ Stock Quotes Trading Service Browser