I've created a new annotation to go with org.jboss.cache.config.Configuration - @Dynamic.

This annotation is applied to fields in the Configuration class and if a setter is called on a Configuration object, if the cache is running and the field the setter modifies does not have the @Dynamic annotation a ConfigurationException is thrown.

Easy way to control configuration changes on a running cache - the only question is, which elements should be treated as dynamic? :)

Here is an initial list of the fields:

private String clusterName = "TreeCache-Group";
 private String clusterConfig = null;
 private boolean useReplQueue = false;
 @Dynamic
 private int replQueueMaxElements = 1000;
 @Dynamic
 private long replQueueInterval = 5000;
 private boolean useInterceptorMbeans = true;
 private boolean fetchInMemoryState = true;
 private short replicationVersion = DEFAULT_REPLICATION_VERSION;
 private String replVersionString = Version.getVersionString(DEFAULT_REPLICATION_VERSION);
 @Dynamic
 private long lockAcquisitionTimeout = 10000;
 @Dynamic
 private long syncReplTimeout = 15000;
 private String evictionPolicyClass = null;
 private CacheMode cacheMode = CacheMode.LOCAL;
 private boolean inactiveOnStartup = false;
 private String serviceName;
 private long initialStateRetrievalTimeout = 10000;
 private IsolationLevel isolationLevel = IsolationLevel.REPEATABLE_READ;
 @Dynamic
 private Element evictionPolicyConfig = null;
 private boolean useRegionBasedMarshalling = false;
 private String transactionManagerLookupClass = null;
 private Element cacheLoaderConfiguration = null;
 @Dynamic
 private boolean syncCommitPhase = false;
 @Dynamic
 private boolean syncRollbackPhase = false;
 private Element buddyReplicationConfig;
 private boolean nodeLockingOptimistic = false;
 private NodeLockingScheme nodeLockingScheme = NodeLockingScheme.PESSIMISTIC;
 private String muxServiceName = null;
 private String muxStackName = "fc-fast-minimalthreads";