poorbarcode commented on code in PR #16758:
URL: https://github.com/apache/pulsar/pull/16758#discussion_r935781120
##########
pulsar-transaction/coordinator/src/main/java/org/apache/pulsar/transaction/coordinator/impl/TxnLogBufferedWriter.java:
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@@ -272,23 +290,43 @@ private void doTrigFlush(boolean force, boolean
byScheduleThreads){
return;
}
if (force) {
+ if (metricsStats != null) {
Review Comment:
> We can add a default TxnLogBufferedWriterMetricsStatsDisabled
implementation to avoid many null checks.
Good Idea. In the complete design, we should have two implementations like
UML blow, one for enabling the batch feature, and another for disabled:
Sorry, I should have added some code comments in this PR(It's now written in
Modifications).
To reduce later maintenance costs, I'd like to ditch the
'DisabledMetricsStat' and we'll always use the implementation 'MetricsStatimpl'
even if the Txn buffer writer disables batch feature. This constructor without
'param-metricsStats' and these' null checks' will be removed in the next PR(
7-2 in Modifications ). This is compatible only with split PR, making each PR
have less code
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