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Add a delay between successive updates of device state to the API

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We add a 1s delay between requests to the API to apply state changes,
as this will throttle it to a point that it has a reasonable rate while
preventing too many unnecessary requests to the API.

Closes #375

Signed-off-by: Pablo Carranza Velez <pablo@resin.io>
This commit is contained in:
Pablo Carranza Velez 2017-01-06 16:52:10 -03:00
parent e419ea32d2
commit f8d3ea1a22
1 changed files with 4 additions and 1 deletions
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5
src/device.coffee
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@ -167,6 +167,8 @@ exports.getDeviceType = do ->
return configFromFile.deviceType
do ->
APPLY_STATE_SUCCESS_DELAY = 1000
APPLY_STATE_RETRY_DELAY = 5000
applyPromise = Promise.resolve()
targetState = {}
actualState = {}
@ -198,10 +200,11 @@ do ->
# Update the actual state.
_.merge(actualState, stateDiff)
)
.delay(APPLY_STATE_SUCCESS_DELAY)
.catch (error) ->
utils.mixpanelTrack('Device info update failure', { error, stateDiff })
# Delay 5s before retrying a failed update
Promise.delay(5000)
Promise.delay(APPLY_STATE_RETRY_DELAY)
.finally ->
# Check if any more state diffs have appeared whilst we've been processing this update.
applyState()