Return error on getStats if Redis client is undefined #33
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Currently when calling getStats, if the first sync call has not been made yet, an 'cannot get value of undefined' error will be thrown. This adds an error message explaining that the client is not initialised and that an initial sync is required.
aidenkeating
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@david-martin @wtrocki Would you mind taking a look? Edit: The changes here are mostly indentation. These are the actual lines: L151, L174-177 |
lib/sync-metrics.js
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| if (err) { | ||
| debugError('Failed to get values from redis for key %s with error : %s', metricName, err); |
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We going to miss that debug in new version. (not sure if that was intentional and we debug callback bellow.
Gong to check that.
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I'll add a debugError statement on L175 to ensure this is logged.
That debug would be if the redis client itself had an error, the current change checks if the redis client actually exists. So we'll still hit it when relevant.
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@aidenkeating - Awesome contribution. This change may also partially resolve this issue: Can you provide verification steps to avoid misunderstandings? |
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@wtrocki Verification can be done using this PR. feedhenry/fh-sync-server#5
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lib/sync-metrics.js
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| async.map(metricsToFetch, function(metric, callback) { | ||
| var metricName = metric.metricName; | ||
| redisClient.lrange([statsNamespace, metricName].join(':'), 0, MAX_NUMBER, function(err, data) { | ||
| if (redisClient) { |
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this change will work, but I think the code will be cleaner if we do it this way:
var getStats = function(cb) {
if(! redisClient) {
return cb(new Error(....));
}
//the rest of code that need no changes
}
WDYT?
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Verified! |
Bump version to 1.0.10
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Thanks for review/verification, addressed comments, merging |
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Currently when calling getStats, if the first sync call has not been
made yet, an error will be thrown stating it cannot get
lrangeof undefined.This is a messy error and doesn't explain what is actually going on.
This adds an error message explaining that the client is not
initialised and that an initial sync is required.