code: protected  void putDialogIntoDistributedCache(SIPDialog dialog) {
  		String dialogId = dialog.getDialogId();	
  		if(getStackLogger().isLoggingEnabled(StackLogger.TRACE_DEBUG)) {
  			getStackLogger().logDebug("sipStack " + this + " storing the dialog " + dialogId + " in the distributed cache");
  		}
  		// put the corresponding dialog into the cache instance
  		try {
  			sipCache.putDialog(dialog);
  		} catch (SipCacheException e) {
  			getStackLogger().logError("sipStack " + this + " problem storing the dialog " + dialogId + " into the distributed cache", e);
  		}
  	}
docs: Store the dialog into the distributed cache
  @param dialog the dialog to store