mattisonchao commented on code in PR #15425:
URL: https://github.com/apache/pulsar/pull/15425#discussion_r866557899
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managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/ManagedCursorImpl.java:
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@@ -2532,10 +2532,45 @@ void internalFlushPendingMarkDeletes() {
void createNewMetadataLedger(final VoidCallback callback) {
ledger.mbean.startCursorLedgerCreateOp();
+ doCreateNewMetadataLedger().thenAccept(newLedgerHandle -> {
+ if (newLedgerHandle == null) {
+ return;
+ }
+ MarkDeleteEntry mdEntry = lastMarkDeleteEntry;
+ // Created the ledger, now write the last position content
+ persistPositionToLedger(newLedgerHandle, mdEntry, new
VoidCallback() {
+ @Override
+ public void operationComplete() {
+ if (log.isDebugEnabled()) {
+ log.debug("[{}] Persisted position {} for cursor {}",
ledger.getName(),
+ mdEntry.newPosition, name);
+ }
+ switchToNewLedger(newLedgerHandle, callback);
+ }
+
+ @Override
+ public void operationFailed(ManagedLedgerException exception) {
+ log.warn("[{}] Failed to persist position {} for cursor
{}", ledger.getName(),
+ mdEntry.newPosition, name);
+
+ deleteLedgerAsync(newLedgerHandle);
+ callback.operationFailed(exception);
+ }
+ });
+ }).whenComplete((result, e) -> {
+ ledger.mbean.endCursorLedgerCreateOp();
+ if (e != null) {
+ callback.operationFailed(createManagedLedgerException(e));
+ }
+ });
+ }
+ private CompletableFuture<LedgerHandle> doCreateNewMetadataLedger() {
+ CompletableFuture<LedgerHandle> future = new CompletableFuture<>();
ledger.asyncCreateLedger(bookkeeper, config, digestType, (rc, lh, ctx)
-> {
if (ledger.checkAndCompleteLedgerOpTask(rc, lh, ctx)) {
+ future.complete(null);
Review Comment:
Question:
Can we return an exception future there? Because returning null directly is
a bit weird to other users and prone to throw NPE.
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