private void filter(Cmd command) {
		if (this.filterList == null) return;
		
		// post-process the command through filters
		for (IFilterContext filterContext : this.filterList) {
			IFilter<ICommand> filter = null;
			try {
				long start = System.currentTimeMillis();
				
				filter = filterContext.getFilter();
				if (this.logger.isDebugEnabled()) {
					this.logger.debug(String.format(
						"[%s] Passing command with ULR '%s' to filter '%s' ...",
						this.filterQueueID,
						command.getLocation(),
						filter.getClass().getName()
					));
				}				
				
				// process the command by the next filter
				filter.filter(command, filterContext);
				if (this.logger.isDebugEnabled()) {
					this.logger.debug(String.format(
						"[%s] Filtering of command with URL '%s' by filter '%s' took %d ms.",
						this.filterQueueID,
						command.getLocation(),
						filter.getClass().getName(),
						System.currentTimeMillis() - start
					));
				}
				
				if (command.getResult() == ICommand.Result.Rejected) {
					this.logger.info(String.format(
							"[%s] Command for URL '%s' rejected by filter '%s'. Reason: %s",
							this.filterQueueID,
							command.getLocation(), 
							filter.getClass().getName(), 
							command.getResultText()
					));
				}				
			} catch (Throwable e) {
				this.logger.error(String.format(
						"[%s] Filter '%s' throwed an '%s' while processing '%s'.",
						this.filterQueueID,
						filter.getClass().getName(),
						e.getClass().getName(),
						command.getLocation()
				),e);
			}
		}
	}