Skip to content

[6.3.x] Improve performance of IntSequenceGenerator (#2408) #2420

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
cshannon merged 1 commit into from
Aug 6, 2026
+11 −6
Merged

[6.3.x] Improve performance of IntSequenceGenerator (#2408) #2420

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
17 changes: 11 additions & 6 deletions activemq-client/src/main/java/org/apache/activemq/util/IntSequenceGenerator.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -16,19 +16,24 @@
*/
package org.apache.activemq.util;

import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;

public class IntSequenceGenerator {

private int lastSequenceId;
private static final AtomicIntegerFieldUpdater<IntSequenceGenerator> SEQUENCE_UPDATER =
AtomicIntegerFieldUpdater.newUpdater(IntSequenceGenerator.class, "lastSequenceId");

private volatile int lastSequenceId;

public synchronized int getNextSequenceId() {
return ++lastSequenceId;
public int getNextSequenceId() {
return SEQUENCE_UPDATER.incrementAndGet(this);
}

public synchronized int getLastSequenceId() {
public int getLastSequenceId() {
return lastSequenceId;
}

public synchronized void setLastSequenceId(int l) {
lastSequenceId = l;
public void setLastSequenceId(int l) {
SEQUENCE_UPDATER.set(this, l);
}
}
Loading