kaisun2000 commented on a change in pull request #1119:
URL: https://github.com/apache/helix/pull/1119#discussion_r459692706
##########
File path:
zookeeper-api/src/main/java/org/apache/helix/zookeeper/zkclient/callback/ZkAsyncCallbacks.java
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@@ -120,6 +122,39 @@ public void handle() {
}
}
+ public static class SyncCallbackHandler extends DefaultCallback implements
AsyncCallback.VoidCallback {
+ private String _sessionId;
+
+ public SyncCallbackHandler(String sessionId) {
+ _sessionId = sessionId;
+ }
+
+ @Override
+ public void processResult(int rc, String path, Object ctx) {
+ LOG.info("sycnOnNewSession with sessionID {} async return code: {}",
_sessionId, rc);
+ callback(rc, path, ctx);
+ }
+
+ @Override
+ public void handle() {
+ // Make compiler happy, not used.
+ }
+
+ @Override
+ protected boolean needRetry(int rc) {
+ try {
+ // Connection to the server has been lost
+ if (KeeperException.Code.get(rc) == Code.CONNECTIONLOSS) {
+ return true;
+ }
+ return false;
+ } catch (ClassCastException | NullPointerException ex) {
Review comment:
This is a good point. I revert back to switch() same as JJ's original
style. Logging unknown code due to NPE is important for us to troubleshooting
if it happens in the field.
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