brumi1024 commented on a change in pull request #3209:
URL: https://github.com/apache/hadoop/pull/3209#discussion_r682489108
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File path:
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/http/HttpServer2.java
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@@ -811,18 +822,26 @@ private static SignerSecretProvider
constructSecretProvider(final Builder b,
throws Exception {
final Configuration conf = b.conf;
Properties config = getFilterProperties(conf,
- b.authFilterConfigurationPrefix);
+ b.authFilterConfigurationPrefixes);
return AuthenticationFilter.constructSecretProvider(
ctx, config, b.disallowFallbackToRandomSignerSecretProvider);
}
- private static Properties getFilterProperties(Configuration conf, String
- prefix) {
- Properties prop = new Properties();
- Map<String, String> filterConfig = AuthenticationFilterInitializer
- .getFilterConfigMap(conf, prefix);
- prop.putAll(filterConfig);
- return prop;
+ public static Properties getFilterProperties(Configuration conf,
+ ArrayList<String> prefixes) {
+ Properties props = new Properties();
+ prefixes.forEach(prefix -> {
+ Map<String, String> filterConfigMap =
+ AuthenticationFilterInitializer.getFilterConfigMap(conf, prefix);
+ filterConfigMap.forEach((key, value) -> {
+ Object previous = props.setProperty(key, value);
+ if (previous != null && !previous.equals(value)) {
+ LOG.warn("Overwriting configuration for key='{}' with value='{}' " +
+ "previous_value='{}'", key, value, previous);
+ }
+ });
+ });
Review comment:
I generally don't have anything against using lambdas, but this doesn't
seem like an improvement over a simple for or for-each loop. Performance wise
(doesn't matter too much in this case) it's similar, but this I think is a bit
harder to read, and debugging it is harder (because the unusual stacktrace that
comes from the lambda), and in the future if for some reason someone wants to
throw a checked exception when parsing the config he/she will need to rewrite
this to a for loop.
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