sijie commented on a change in pull request #1281: Issue #570: Introducing
EntryLogManager.
URL: https://github.com/apache/bookkeeper/pull/1281#discussion_r176336283
##########
File path:
bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/EntryLogger.java
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@@ -802,88 +864,207 @@ private long readLastLogId(File f) {
}
}
+ interface EntryLogManager {
+ /*
+ * acquire lock for this ledger.
+ */
+ void acquireLock(Long ledgerId);
+
+ /*
+ * acquire lock for this ledger if it is not already available for this
+ * ledger then it will create a new one and then acquire lock.
+ */
+ void acquireLockByCreatingIfRequired(Long ledgerId);
+
+ /*
+ * release lock for this ledger
+ */
+ void releaseLock(Long ledgerId);
+
+ /*
+ * sets the logChannel for the given ledgerId. The previous one will be
+ * removed from replicaOfCurrentLogChannels. Previous logChannel will
be
+ * added to rotatedLogChannels.
+ */
+ void setCurrentLogForLedger(Long ledgerId, BufferedLogChannel
logChannel);
Review comment:
All the `currentLogForLedger` `copy of rotated log channels` `copy of
current logs` are kind of implementation detail of an implementation of
EntryLogManager. Can we think of a better abstraction to hide these?
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