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Nikolay Tsyb (HYS Enterprise) "Immortal system as a piece of cake."
The document discusses using finite state machines and Spring State Machine to build fault-tolerant systems. It provides examples of state machines in real life, an example of a coin-operated turnstile state machine, and how Spring State Machine can be used to configure states, transitions, actions, guards, and listeners. It also discusses persisting state machine context and building immutable systems using a master-slave approach for deployment.
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Nikolay Tsyb (HYS Enterprise) "Immortal system as a piece of cake."
- 1. Immortal system as apiece of cake By Nickolay Tsyb Javameetup
- 2. My experience Commerce softwaredevelopment over 8 years
- 3. My experience Now I’mworking in HYS-Enterprise as a teamlead
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- 15. Starting Waiting TalkingOn hold Finishing
- 16. Starting Waiting TalkingOn hold Finishing
- 17. Starting Waiting TalkingOn hold Finishing Handling
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- 22. Chapter 1 What isfinite state machine?
- 23. Chapter 2 How tobuild fault tolerance system?
- 24. Chapter 3 Deep diveinto spring state machine
- 25. Abstract mathematical model or graphwith states and transitions
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- 28. Examples from reallife...
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- 30. AI in computergames
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- 35. Transitions 1. Push (-> ) 2. Push ( -> ) 3. Coin ( -> ) 4. Coin ( -> )
- 36. State’s handling void coin(Statestate) { ... if (state.equals(LOCKED)) { //coin implementation state = UNLOCKED; } ... }
- 38. State’s handling void push(Statestate) { ... if (state.equals(UNLOCKED)) { //push implementation state = LOCKED; } ... }
- 40. What about realproject?
- 42. How can wejust handle new state in project?
- 44. One of themain problems
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- 48. High barrier toentry for new members of team
- 49. More time fortesting
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- 60. Support of extendedstate Sitting Eating Sleeping meow... Is hungry?
- 61. Support of internalstate machine Sitting Eating meow... Is hungry?
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- 64. Error handling andtesting
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- 66. public enum States{ SITTING, EATING, SLEEPING; }
- 67. public enum Events{ SIT, EAT, SLEEP; }
- 68. public void configure(StateMachineStateConfigurer<States,Events> states) throws Exception { states.withStates() .initial(States.SITTING) .state(States.EATING) .end(States.SLEEPING); }
- 69. public void configure(StateMachineTransitionConfigurer<States,Events> transitions) throws Exception { transitions .withExternal().source(States.SITTING).target(States.EATING).event(Events.EAT).and() .withExternal().source(States.EATING).target(States.SITTING).event(Events.SIT).and() .withExternal().source(States.SITTING).target(States.SLEEPING).event(Events.SLEEP).and() .withExternal().source(States.EATING).target(States.SLEEPING).event(Events.SLEEP); }
- 70. Data storage andpersisting
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- 73. States persisting Events States Transitions Intercept andupdate State machine context
- 74. State machine context State machine context Serialization (Cryoby default) Redis Mongo JPA Add or update
- 75. State machine context State machine context Deserialization (Cryoby default) Redis Mongo JPA Restore
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- 87. Build&Deployment process Push Trigger(pull&build)
- 88. Build&Deployment process Push Trigger(pull&build) Create and store image
- 89. Build&Deployment process Push Trigger(pull&build) Create and store image Get image
- 90. Build&Deployment process Push Trigger(pull&build) Create and store image Get image Deploy
- 91. Build&Deployment process Push Trigger(pull&build) Create and store image Get image Deploy
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- 99. Thank you for yourattention!
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