YARN-11345. [Federation] Refactoring Yarn Router's Application Web Page. #5030
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@goiri Can you help review the code? Thank you very much! |
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@goiri Can you help review this pr? Thank you very much! |
goiri
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Oct 19, 2022
| appsTableData.append("\"],\n"); | ||
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| } catch (Exception e) { | ||
| LOG.info( |
| "Cannot add application {}: {}", app.getAppId(), e.getMessage()); | ||
| } | ||
| } | ||
| if (appsTableData.charAt(appsTableData.length() - 2) == ',') { |
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As we are refactoring, this is a little hacky.
At least it could be more readable.
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I will modify the code.
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goiri
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Oct 20, 2022
| } | ||
| } | ||
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| // The purpose of this part of the code is to remove redundant commas. |
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We know how many apps there will be, we should only add it if not the last:
if (appsInfo != null) {
Collection<AppInfo> apps = appsInfo.getApps();
if (CollectionUtils.isNotEmpty(apps)) {
int numApps = apps.size();
for (AppInfo app: apps) {
...
if (i < numApps - 1) {
appsTableData.append(",");
}
}
}
}
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Thanks for your suggestion, I will refactor this part of the code.
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goiri
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Oct 20, 2022
| Collection<AppInfo> apps = appsInfo.getApps(); | ||
| if (CollectionUtils.isNotEmpty(apps)) { | ||
| int numApps = apps.size(); | ||
| int i = 0; |
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I put i++ after try...catch and the loop can end even if the application has errors.
slfan1989
commented
Oct 20, 2022
| } catch (Exception e) { | ||
| LOG.info("Cannot add application {}: {}", app.getAppId(), e.getMessage()); | ||
| } | ||
| i++; |
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i++ is placed after try...catch.
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Thanks for your suggestion, I will refactor this part of the code to make it more readable.
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I read this part of the code carefully, the original code is reasonable, we should remove the extra comma outside the loop because we can't tell where the last comma is
For example:
We have 4 apps, A, B, C, D, and we expect the result to be [A, B, C, D], but when traversing the app list, the last app D fails, and we end up with [A ,B,C,], the last app D fails, we can't handle this situation inside the loop.
But the readability of the original logic is not good, I refactored this part of the code.
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goiri
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Oct 21, 2022
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@goiri Can you help to merge this pr into trunk branch? Thank you very much! I will follow up with YARN-11354 [Federation] Add Yarn Router's NodeLabel Web Page. |
goiri
approved these changes
Oct 24, 2022
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@goiri Thank you very much for helping to review the code! |
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Nov 28, 2022
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JIRA: YARN-11345. [Federation] Refactoring Yarn Router's Application Web Page.
Improve the Application page of Yarn Router, try to be the same as the Yarn RM app page.
Router App page style before modification:
Router App page style after modification:
From the router's point of view, we can see the app running of the entire Federation
From the subcluster point of view, we can see the app running of the subcluster
For SubCluster, support query by app status
If we don't enable Federation
