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February 25, 2021 04:18
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| const fetchDeviceState = () => | |
| Math.random() > 0.8 ? Promise.resolve() : Promise.reject() | |
| const yardianStateMachine = Machine({ | |
| id: 'yardian-state-machine', | |
| initial: 'fetchingDeviceState', | |
| context: { | |
| retries: 0 | |
| }, | |
| states: { | |
| fetchingDeviceState: { | |
| entry: ['incrementRetries'], | |
| invoke: { | |
| id: 'fetchDeviceState', | |
| src: fetchDeviceState, | |
| onDone: { | |
| target: 'success' | |
| }, | |
| onError: { | |
| target: 'failure' | |
| } | |
| } | |
| // on: { | |
| // success: { | |
| // target: 'success' | |
| // }, | |
| // failure: { | |
| // target: 'failure' | |
| // } | |
| // } | |
| }, | |
| success: { | |
| entry: ['resetRetries', 'parseDeviceState'], | |
| states: { | |
| watering: { | |
| } | |
| } | |
| }, | |
| failure: { | |
| on: { | |
| '': { | |
| target: "fatal", | |
| cond: (context) => context.retries >= 3 | |
| } | |
| }, | |
| after: { | |
| 1000: { | |
| target: 'fetchingDeviceState', | |
| } | |
| } | |
| }, | |
| fatal: { | |
| on: { | |
| RETRY: { | |
| target: 'fetchingDeviceState', | |
| actions: ['resetRetries'] | |
| } | |
| } | |
| } | |
| } | |
| }, { | |
| actions: { | |
| 'incrementRetries': assign({ retries: context => context.retries + 1 }), | |
| 'resetRetries': assign({ retries: 0 }), | |
| parseDeviceState: (context, event) => { | |
| console.log(event.data); | |
| } | |
| } | |
| }); | |
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