[
https://issues.apache.org/jira/browse/KNOX-2134?focusedWorklogId=348307&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-348307
]
ASF GitHub Bot logged work on KNOX-2134:
----------------------------------------
Author: ASF GitHub Bot
Created on: 22/Nov/19 19:37
Start Date: 22/Nov/19 19:37
Worklog Time Spent: 10m
Work Description: risdenk commented on pull request #205: KNOX-2134 - Add
caching to ZookeeperRemoteAliasService
URL: https://github.com/apache/knox/pull/205#discussion_r349761544
##########
File path:
gateway-server/src/main/java/org/apache/knox/gateway/services/security/impl/ZookeeperRemoteAliasService.java
##########
@@ -169,19 +171,23 @@ private static void checkPathsExist(
public List<String> getAliasesForCluster(final String clusterName) throws
AliasServiceException {
List<String> remoteAliases = new ArrayList<>();
- /* If we have remote registry configured, query it */
- if (remoteClient != null) {
- remoteAliases = remoteClient
- .listChildEntries(buildClusterEntryName(clusterName));
+ // First, check the alias cache
+ if (aliasCache.containsKey(clusterName)) {
+ remoteAliases.addAll(aliasCache.get(clusterName).keySet());
+ } else { // If it's not available locally, then check ZK
+ /* If we have remote registry configured, query it */
+ if (remoteClient != null) {
+ remoteAliases =
remoteClient.listChildEntries(buildClusterEntryName(clusterName));
+ }
Review comment:
If the cache isn't up to date for whatever reason, we should update the
cache and return that data. Now have to be careful about a race condition here.
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Issue Time Tracking
-------------------
Worklog Id: (was: 348307)
Time Spent: 50m (was: 40m)
> Add caching to ZookeeperRemoteAliasService
> ------------------------------------------
>
> Key: KNOX-2134
> URL: https://issues.apache.org/jira/browse/KNOX-2134
> Project: Apache Knox
> Issue Type: Bug
> Components: Server
> Affects Versions: 1.3.0
> Reporter: Philip Zampino
> Assignee: Philip Zampino
> Priority: Major
> Fix For: 1.4.0
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> The ZookeeperRemoteAliasService implementation always goes to ZooKeeper to
> retrieve alias data. Instead, it should cache the data locally to make
> password retrieval much faster.
> The implementation already receives pushes from ZooKeeper when alias znodes
> change, so instead of only updating the associated local alias service, it
> can also update its own cache.
> This way, it only ever needs to go to ZooKeeper for add/remove operations.
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