imbajin commented on code in PR #2863:
URL:
https://github.com/apache/incubator-hugegraph/pull/2863#discussion_r2313288456
##########
hugegraph-server/hugegraph-rocksdb/src/main/java/org/apache/hugegraph/backend/store/rocksdb/RocksDBStore.java:
##########
@@ -813,12 +776,56 @@ private void closeSessions() {
}
}
- private Collection<RocksDBSessions> sessions() {
+ private final Collection<RocksDBSessions> sessions() {
return this.dbs.values();
}
- private void parseTableDiskMapping(Map<String, String> disks, String
dataPath) {
+ private final List<RocksDBSessions.Session> session() {
+ this.checkDbOpened();
+
+ // Collect session of standard disk
+ RocksDBSessions.Session session = this.sessions.session();
+ if (!session.opened()) {
+ this.checkOpened();
+ }
+
+ if (this.tableDiskMapping.isEmpty()) {
+ return ImmutableList.of(session);
+ }
Review Comment:
Performance optimization looks good, but consider session state consistency.
The conditional checkOpened() call based on session.opened() could introduce
race conditions between the check and actual session usage.
##########
hugegraph-server/hugegraph-rocksdb/src/main/java/org/apache/hugegraph/backend/store/rocksdb/RocksDBStore.java:
##########
@@ -813,12 +776,56 @@ private void closeSessions() {
}
}
- private Collection<RocksDBSessions> sessions() {
+ private final Collection<RocksDBSessions> sessions() {
return this.dbs.values();
}
- private void parseTableDiskMapping(Map<String, String> disks, String
dataPath) {
+ private final List<RocksDBSessions.Session> session() {
+ this.checkDbOpened();
+
+ // Collect session of standard disk
+ RocksDBSessions.Session session = this.sessions.session();
+ if (!session.opened()) {
+ this.checkOpened();
+ }
+
+ if (this.tableDiskMapping.isEmpty()) {
+ return ImmutableList.of(session);
+ }
+ // Collect session of each table with optimized disk
+ List<RocksDBSessions.Session> list = new
ArrayList<>(this.tableDiskMapping.size() + 1);
+ list.add(session);
+ for (String disk : this.tableDiskMapping.values()) {
+ RocksDBSessions.Session optimizedSession = this.db(disk).session();
+ assert optimizedSession.opened();
Review Comment:
Inconsistent session state handling: optimized sessions use assert
optimizedSession.opened() while standard sessions get conditional checks.
Consider applying the same defensive pattern to both session types for
consistency.
##########
hugegraph-server/hugegraph-rocksdb/src/main/java/org/apache/hugegraph/backend/store/rocksdb/RocksDBStore.java:
##########
@@ -813,12 +776,56 @@ private void closeSessions() {
}
}
- private Collection<RocksDBSessions> sessions() {
+ private final Collection<RocksDBSessions> sessions() {
return this.dbs.values();
}
- private void parseTableDiskMapping(Map<String, String> disks, String
dataPath) {
+ private final List<RocksDBSessions.Session> session() {
Review Comment:
Consider making session() method final like sessions() for consistency and
to prevent accidental overrides that could break the optimized session
management logic.
##########
hugegraph-server/hugegraph-rocksdb/src/main/java/org/apache/hugegraph/backend/store/rocksdb/RocksDBStore.java:
##########
@@ -425,7 +425,6 @@ public void mutate(BackendMutation mutation) {
Lock readLock = this.storeLock.readLock();
Review Comment:
Good performance optimization removing redundant checkOpened() calls. Ensure
comprehensive testing covers store state consistency under concurrent access
and that the performance gains are measurable without introducing subtle bugs.
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