Comments (3)
@tsgautier Sorry about the trouble! Looking at this right now....
from postal.js.
no problem - surprisingly, nextTick works, but leaves the code susceptible to multiple deliveries, so a flag is required to protect that, here's an approximation:
p = require 'postal'
postal = new p()
channel = postal.channel ''
delivered = false
subscription1 = channel.subscribe 'test', ->
return if delivered
delivered = true
console.log '1 received message'
process.nextTick -> subscription1.unsubscribe()
subscription2 = channel.subscribe 'test', ->
console.log '2 received message'
channel.publish 'test'
channel.publish 'test'
from postal.js.
This issue should be resolved - sorry for the woes. I should know better than to iterate over mutating arrays. :-)
Unsubscribe calls are now queued to occur after the publish has completed, but any subscriber that unsubscribes during the publish is immediately marked inactive, so the callback won't be invoked again.
One other thing, you actually don't need the new
when you invoke postal = new p()
. Instead you can opt for:
postal = require('postal')()
# OR
p = require 'postal'
postal = p()
The node module just returns a factory function that optionally takes underscore as a dependency (it requires underscore for you if it's not passed). This approach is used so that postal and any add-ons are all accessing the same instances of modules...
Let me know if you run into any other issues.
Thanks!
from postal.js.
Related Issues (20)
- How to publish data between Node.js modules? HOT 2
- Bower Release v2.0.5
- Competing consumers HOT 1
- Help improve the quality of the DefinitelyTyped (TypeScript) definitions
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- Default Subscriber
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- Shouldn't postal.channel() implement the Singleton pattern? HOT 2
- Subscriber callback method can brake calling other subscribers HOT 1
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- why cache only for result === true
- postal.lodash.js Error: Module name "lodash/after" has not been loaded
- Is this project still active? HOT 6
- Wait for messages to be delivered and processed in unit tests
- timeStamp in envelope should honor timezone
- Timestamp missing on wireTap envelopes
- Thank you
- Regarding publish and subscribe, Important question
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from postal.js.