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From "Reid Chan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-17064) Add TaskMonitor#getTasks() variant which accepts type selection
Date Tue, 15 Aug 2017 07:58:00 GMT

     [ https://issues.apache.org/jira/browse/HBASE-17064?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Reid Chan updated HBASE-17064:
------------------------------
    Status: Patch Available  (was: Open)

> Add TaskMonitor#getTasks() variant which accepts type selection
> ---------------------------------------------------------------
>
>                 Key: HBASE-17064
>                 URL: https://issues.apache.org/jira/browse/HBASE-17064
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: Reid Chan
>            Priority: Minor
>              Labels: ui
>         Attachments: HBASE-17064.master.001.patch
>
>
> In TaskMonitorTmpl.jamon :
> {code}
> List<? extends MonitoredTask> tasks = taskMonitor.getTasks();
> Iterator<? extends MonitoredTask> iter = tasks.iterator();
> // apply requested filter
> while (iter.hasNext()) {
>   MonitoredTask t = iter.next();
>   if (filter.equals("general")) {
>     if (t instanceof MonitoredRPCHandler)
>       iter.remove();
> {code}
> This means when user refreshes rs-status page, regardless of the type of filter, we always
traverse and clone MonitoredTask's.
> getTasks() is synchronized :
> {code}
>   public synchronized List<MonitoredTask> getTasks() {
> {code}
> A variant of getTasks() can be added which takes the type of filter so that unnecessary
cloning is avoided.



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