Dispatching action when a custom observable is cancelled
The newest version of redux-observable doesn't give any access to store and we have to dispatch actions by returning them from epics. I don't know how to dispatch actions when some observables are cancelled, for example by switchMap effect. For instance:
const counter = new Observable(observer => {
let i = 0;
const timer = setInterval(() => {
observer.next(i++);
}, 1000);
return {
unsubscribe: () => {
clearInterval(timer);
// how to dispatch action here like { type: 'COUNTER_ABORTED' }?
}
};
});
Or maybe this is RXJS antipattern what I want to do? Maybe there is some switchMap trick I could use to do additional things for cancelled observables?
rxjs redux-observable
asked Nov 16 '18 at 9:31
klis87klis87
1821114
add a comment |
The newest version of redux-observable doesn't give any access to store and we have to dispatch actions by returning them from epics. I don't know how to dispatch actions when some observables are cancelled, for example by switchMap effect. For instance:
const counter = new Observable(observer => {
let i = 0;
const timer = setInterval(() => {
observer.next(i++);
}, 1000);
return {
unsubscribe: () => {
clearInterval(timer);
// how to dispatch action here like { type: 'COUNTER_ABORTED' }?
}
};
});
Or maybe this is RXJS antipattern what I want to do? Maybe there is some switchMap trick I could use to do additional things for cancelled observables?
rxjs redux-observable
asked Nov 16 '18 at 9:31
klis87klis87
1821114
As far as I know you cannot emit a value through the teardown logic. Maybe you can call a function in thecompletecallback to get the actions?counter.subscribe(event => /* ... */, null, () => getActions())
– Sam Herrmann
Nov 16 '18 at 16:30
Thats why I would need to callstore.dispatch, but I don't have access to it there and it seems hacky to provide this value by a closure etc, so I search for rxjs solution if this exists. Re your suggestion, how can I know incompletewhether observable was successful, errored or cancelled? Pity we dont have callbackonCancelin observer instance.
– klis87
Nov 16 '18 at 17:05
add a comment |
The newest version of redux-observable doesn't give any access to store and we have to dispatch actions by returning them from epics. I don't know how to dispatch actions when some observables are cancelled, for example by switchMap effect. For instance:
const counter = new Observable(observer => {
let i = 0;
const timer = setInterval(() => {
observer.next(i++);
}, 1000);
return {
unsubscribe: () => {
clearInterval(timer);
// how to dispatch action here like { type: 'COUNTER_ABORTED' }?
}
};
});
Or maybe this is RXJS antipattern what I want to do? Maybe there is some switchMap trick I could use to do additional things for cancelled observables?
rxjs redux-observable
asked Nov 16 '18 at 9:31
klis87klis87
1821114
The newest version of redux-observable doesn't give any access to store and we have to dispatch actions by returning them from epics. I don't know how to dispatch actions when some observables are cancelled, for example by switchMap effect. For instance:
const counter = new Observable(observer => {
let i = 0;
const timer = setInterval(() => {
observer.next(i++);
}, 1000);
return {
unsubscribe: () => {
clearInterval(timer);
// how to dispatch action here like { type: 'COUNTER_ABORTED' }?
}
};
});
Or maybe this is RXJS antipattern what I want to do? Maybe there is some switchMap trick I could use to do additional things for cancelled observables?
rxjs redux-observable
rxjs redux-observable
asked Nov 16 '18 at 9:31
klis87klis87
1821114
asked Nov 16 '18 at 9:31
klis87klis87
1821114
edited Nov 16 '18 at 13:31
klis87
asked Nov 16 '18 at 9:31
klis87klis87
1821114
asked Nov 16 '18 at 9:31
klis87klis87
1821114
asked Nov 16 '18 at 9:31
klis87klis87
1821114
1821114
As far as I know you cannot emit a value through the teardown logic. Maybe you can call a function in thecompletecallback to get the actions?counter.subscribe(event => /* ... */, null, () => getActions())
– Sam Herrmann
Nov 16 '18 at 16:30
Thats why I would need to callstore.dispatch, but I don't have access to it there and it seems hacky to provide this value by a closure etc, so I search for rxjs solution if this exists. Re your suggestion, how can I know incompletewhether observable was successful, errored or cancelled? Pity we dont have callbackonCancelin observer instance.
– klis87
Nov 16 '18 at 17:05
add a comment |
As far as I know you cannot emit a value through the teardown logic. Maybe you can call a function in thecompletecallback to get the actions?counter.subscribe(event => /* ... */, null, () => getActions())
– Sam Herrmann
Nov 16 '18 at 16:30
Thats why I would need to callstore.dispatch, but I don't have access to it there and it seems hacky to provide this value by a closure etc, so I search for rxjs solution if this exists. Re your suggestion, how can I know incompletewhether observable was successful, errored or cancelled? Pity we dont have callbackonCancelin observer instance.
– klis87
Nov 16 '18 at 17:05
As far as I know you cannot emit a value through the teardown logic. Maybe you can call a function in the
complete callback to get the actions? counter.subscribe(event => /* ... */, null, () => getActions())– Sam Herrmann
Nov 16 '18 at 16:30
As far as I know you cannot emit a value through the teardown logic. Maybe you can call a function in the
complete callback to get the actions? counter.subscribe(event => /* ... */, null, () => getActions())– Sam Herrmann
Nov 16 '18 at 16:30
Thats why I would need to call
store.dispatch, but I don't have access to it there and it seems hacky to provide this value by a closure etc, so I search for rxjs solution if this exists. Re your suggestion, how can I know in complete whether observable was successful, errored or cancelled? Pity we dont have callback onCancel in observer instance.– klis87
Nov 16 '18 at 17:05
Thats why I would need to call
store.dispatch, but I don't have access to it there and it seems hacky to provide this value by a closure etc, so I search for rxjs solution if this exists. Re your suggestion, how can I know in complete whether observable was successful, errored or cancelled? Pity we dont have callback onCancel in observer instance.– klis87
Nov 16 '18 at 17:05
add a comment |
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As far as I know you cannot emit a value through the teardown logic. Maybe you can call a function in the
completecallback to get the actions?counter.subscribe(event => /* ... */, null, () => getActions())– Sam Herrmann
Nov 16 '18 at 16:30
Thats why I would need to call
store.dispatch, but I don't have access to it there and it seems hacky to provide this value by a closure etc, so I search for rxjs solution if this exists. Re your suggestion, how can I know incompletewhether observable was successful, errored or cancelled? Pity we dont have callbackonCancelin observer instance.– klis87
Nov 16 '18 at 17:05