rcs.setChannels(Collections.singletonList(channel));
ChannelProcessor chp = new ChannelProcessor(rcs);
Context chpContext = new Context();
chpContext.put("interceptors", "uuidinterceptor");
chpContext.put("interceptors.uuidinterceptor.type", UUIDInterceptor.Builder.class.getName());
chp.configure(chpContext);
source.setChannelProcessor(chp);
deleteAllDocuments();
}