slfan1989 commented on code in PR #4594:
URL: https://github.com/apache/hadoop/pull/4594#discussion_r926208755
##########
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/rmadmin/RouterRMAdminService.java:
##########
@@ -215,43 +190,24 @@ protected Map<String, RequestInterceptorChainWrapper>
getPipelines() {
@VisibleForTesting
protected RMAdminRequestInterceptor createRequestInterceptorChain() {
Configuration conf = getConfig();
+ RMAdminRequestInterceptor pipeline = null;
+ ClientMethod remoteMethod = null;
+ try {
+ remoteMethod = new ClientMethod("setNextInterceptor",
+ new Class[]{RMAdminRequestInterceptor.class}, new
Object[]{null});
- List<String> interceptorClassNames = getInterceptorClassNames(conf);
+ pipeline = RouterServerUtil.createRequestInterceptorChain(conf,
+ YarnConfiguration.ROUTER_RMADMIN_INTERCEPTOR_CLASS_PIPELINE,
+ YarnConfiguration.DEFAULT_ROUTER_RMADMIN_INTERCEPTOR_CLASS,
+ remoteMethod, RMAdminRequestInterceptor.class);
- RMAdminRequestInterceptor pipeline = null;
- RMAdminRequestInterceptor current = null;
- for (String interceptorClassName : interceptorClassNames) {
- try {
- Class<?> interceptorClass = conf.getClassByName(interceptorClassName);
- if (RMAdminRequestInterceptor.class
- .isAssignableFrom(interceptorClass)) {
- RMAdminRequestInterceptor interceptorInstance =
- (RMAdminRequestInterceptor) ReflectionUtils
- .newInstance(interceptorClass, conf);
- if (pipeline == null) {
- pipeline = interceptorInstance;
- current = interceptorInstance;
- continue;
- } else {
- current.setNextInterceptor(interceptorInstance);
- current = interceptorInstance;
- }
- } else {
- throw new YarnRuntimeException(
- "Class: " + interceptorClassName + " not instance of "
- + RMAdminRequestInterceptor.class.getCanonicalName());
- }
- } catch (ClassNotFoundException e) {
+ if (pipeline == null) {
throw new YarnRuntimeException(
- "Could not instantiate RMAdminRequestInterceptor: "
- + interceptorClassName,
- e);
+ "RequestInterceptor pipeline is not configured in the system.");
}
- }
-
- if (pipeline == null) {
- throw new YarnRuntimeException(
- "RequestInterceptor pipeline is not configured in the system");
+ } catch (IOException | InvocationTargetException | NoSuchMethodException |
RuntimeException
+ | IllegalAccessException ex) {
+ throw new YarnRuntimeException("Create RequestInterceptor Chain error.",
ex);
}
return pipeline;
Review Comment:
Thank you for your suggestion. I handled different Exceptions in
RouterServerUtil#createRequestInterceptorChain, and used YarnRuntimeException
to make it easier for the caller to use it.
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