slfan1989 commented on code in PR #4543:
URL: https://github.com/apache/hadoop/pull/4543#discussion_r922600391
##########
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/webapp/FederationInterceptorREST.java:
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@@ -1366,4 +1386,49 @@ public void shutdown() {
threadpool.shutdown();
}
}
+
+ <R> Map<SubClusterInfo, R> invokeConcurrent(Collection<SubClusterInfo>
clusterIds,
+ ClientMethod request, Class<R> clazz) throws YarnException, IOException
{
+ ArrayList<SubClusterInfo> clusterIdList = new ArrayList<>(clusterIds);
+ return invokeConcurrent(clusterIdList, request, clazz);
+ }
+
+ private <R> Map<SubClusterInfo, R>
invokeConcurrent(ArrayList<SubClusterInfo> subClusterInfo,
+ ClientMethod request, Class<R> clazz) {
+
+ Map<SubClusterInfo, R> results = new HashMap<>();
+
+ // Send the requests in parallel
+ CompletionService<R> compSvc = new
ExecutorCompletionService<>(this.threadpool);
+
+ for (final SubClusterInfo info : subClusterInfo) {
+ compSvc.submit(() -> {
+ DefaultRequestInterceptorREST interceptor =
getOrCreateInterceptorForSubCluster(
+ info.getSubClusterId(), info.getRMWebServiceAddress());
+ try {
+ Method method = DefaultRequestInterceptorREST.class.
+ getMethod(request.getMethodName(), request.getTypes());
+ return clazz.cast(method.invoke(interceptor, request.getParams()));
Review Comment:
I added cast to R.
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