X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?p=controller.git;a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fcds-access-client%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Faccess%2Fclient%2FEmptyQueue.java;h=125f0251cd947198edbc17072d66c7fc607c7d61;hp=c4a09e736c8279df4029e53c94d31832b5a5cd41;hb=60b94e13e2c92ea7d3ef39d4aa6b96674a9415b2;hpb=314d5b41ea6b464db939da95a33c872f594ccada

diff --git a/opendaylight/md-sal/cds-access-client/src/main/java/org/opendaylight/controller/cluster/access/client/EmptyQueue.java b/opendaylight/md-sal/cds-access-client/src/main/java/org/opendaylight/controller/cluster/access/client/EmptyQueue.java
index c4a09e736c..125f0251cd 100644
--- a/opendaylight/md-sal/cds-access-client/src/main/java/org/opendaylight/controller/cluster/access/client/EmptyQueue.java
+++ b/opendaylight/md-sal/cds-access-client/src/main/java/org/opendaylight/controller/cluster/access/client/EmptyQueue.java
@@ -12,18 +12,18 @@ import java.util.AbstractQueue;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.Queue;
+import org.opendaylight.yangtools.concepts.Immutable;
 
 /**
  * A specialized always-empty implementation of {@link java.util.Queue}. This implementation will always refuse new
  * elements in its {@link #offer(Object)} method.
-
  * @author Robert Varga
  *
  * @param <E> the type of elements held in this collection
  */
 // TODO: move this class into yangtools.util
 @Beta
-public final class EmptyQueue<E> extends AbstractQueue<E> {
+public final class EmptyQueue<E> extends AbstractQueue<E> implements Immutable {
     private static final EmptyQueue<?> INSTANCE = new EmptyQueue<>();
 
     private EmptyQueue() {
@@ -59,4 +59,4 @@ public final class EmptyQueue<E> extends AbstractQueue<E> {
     public int size() {
         return 0;
     }
-}
\ No newline at end of file
+}