Support locks in SerializingCache

The plugin now requires Openfire 5.0.0 or later.

fixes #112

Author: guusdk

changelog.html

@@ -46,6 +46,7 @@ <h1>
 <p><b>5.5.0 Release 2</b> -- tbd</p>
 <ul>
     <li>[<a href='https://github.com/igniterealtime/openfire-hazelcast-plugin/issues/117'>Issue #117</a>] - Fix cluster node page cannot open</li>
+    <li>[<a href='https://github.com/igniterealtime/openfire-hazelcast-plugin/issues/112'>Issue #112</a>] - Support locks in SerializingCache</li>
 </ul>
 
 <p><b>5.5.0 Release 1</b> -- June 12, 2025</p>

pom.xml

@@ -4,7 +4,7 @@
     <parent>
         <artifactId>plugins</artifactId>
         <groupId>org.igniterealtime.openfire</groupId>
-        <version>5.0.0-beta</version>
+        <version>5.0.0</version>
     </parent>
     <groupId>org.igniterealtime.openfire.plugins</groupId>
     <artifactId>hazelcast</artifactId>

src/java/org/jivesoftware/openfire/plugin/util/cache/ClusteredCacheFactory.java

@@ -40,6 +40,7 @@
 import org.jivesoftware.util.cache.ClusterTask;
 import org.jivesoftware.util.cache.ExternalizableUtil;
 import org.jivesoftware.util.cache.ExternalizableUtilStrategy;
+import org.jivesoftware.util.cache.SerializingCache;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -289,6 +290,9 @@ public void destroyCache(Cache cache) {
         if (cache instanceof CacheWrapper) {
             cache = ((CacheWrapper) cache).getWrappedCache();
         }
+        if (cache instanceof SerializingCache) {
+            cache = ((SerializingCache) cache).getDelegate();
+        }
 
         final ClusteredCache clustered = (ClusteredCache) cache;
         clustered.destroy();