slfan1989 commented on code in PR #4314:
URL: https://github.com/apache/hadoop/pull/4314#discussion_r945302648
##########
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-web-proxy/src/main/java/org/apache/hadoop/yarn/server/webproxy/WebAppProxyServlet.java:
##########
@@ -134,16 +132,19 @@ public WebAppProxyServlet() {
this.trackingUriPlugins =
conf.getInstances(YarnConfiguration.YARN_TRACKING_URL_GENERATOR,
TrackingUriPlugin.class);
- this.rmAppPageUrlBase =
- StringHelper.pjoin(WebAppUtils.getResolvedRMWebAppURLWithScheme(conf),
- "cluster", "app");
this.failurePageUrlBase =
StringHelper.pjoin(WebAppUtils.getResolvedRMWebAppURLWithScheme(conf),
"cluster", "failure");
- this.ahsAppPageUrlBase =
- StringHelper.pjoin(WebAppUtils.getHttpSchemePrefix(conf)
- + WebAppUtils.getAHSWebAppURLWithoutScheme(conf),
- "applicationhistory", "app");
+ }
+
+ private String getRmAppPageUrlBase(ApplicationId id) throws YarnException,
IOException {
+ return ((AppReportFetcher)
getServletContext().getAttribute(WebAppProxy.FETCHER_ATTRIBUTE))
Review Comment:
This line of code needs to be refactored, too many layers and not easy to
read.
This way of writing might be better.
```
AppReportFetcher appReportFetcher = (AppReportFetcher) getServletContext();
Attribute attr1 =
appReportFetcher.getAttribute(WebAppProxy.FETCHER_ATTRIBUTE);
return attr1.getAhsAppPageUrlBase();
```
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