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https://issues.apache.org/jira/browse/METRON-2190?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16892586#comment-16892586
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Tibor Meller commented on METRON-2190:
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Yes, on a per-user basis.
> [UI] Alerts UI: Indicating loading and preventing parallel requests
> -------------------------------------------------------------------
>
> Key: METRON-2190
> URL: https://issues.apache.org/jira/browse/METRON-2190
> Project: Metron
> Issue Type: Bug
> Reporter: Tibor Meller
> Assignee: Tibor Meller
> Priority: Major
>
> h2. Loading indicator and blocking loading state
> The loading indicator will be applied for both manual and automatic alert
> entry querying but in a different way (manual blocking, auto nonblocking).
> *Loading state of a manual query* better to block the UI with a modal load
> indicator. Changing grouping, filtering, querying, time range change, turning
> automatic querying on/off, changing show/hide toggles or sorting could all
> trigger another search request. We would like to prevent this (having
> multiple operations) so it is better to block these operations while UI
> waiting for a response.
> *Loading triggered by automatic querying* indicated with a smaller spinner
> close to the Play icon and it's blocking no interaction with other parts of
> the UI. The automatic query should be canceled if the user triggers a manual
> query or when the next automatic query triggered by the timer (as a later
> improvement we can warn the user about getting no answer within the refresh
> period).
> With this fix, we can prevent UI fireing and listen to multiple query
> responses at the same time.
> h2. A) Issue: Lack of loading indicator (spinner)
> There is no indicator such as a "spinner" that a query is pending/executing,
> so if the screen does not change, you have no idea (or if you were not
> watching as it changed). This is a problem when queries do not return
> immediately, considering the issue where there are multiple pending queries.
> h2. B) Issue: allowing Multiple pending Query Requests
> For Solr queries that are not sub-second, as they are submitted and responses
> are still pending, requests queue up and results start updating the UI in
> order as they come in. If queries are really slow, this can become very
> confusing as 3-4 changes may happen in the UI.
>
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