key = prependRequest.getKey ();
MemcachedStub.logger.trace (mssgPrefix + mcMessage.toString () + " key: " + key + " - request id: " + token.getMessageId () + " client id: " + token.getClientId ());
data = prependRequest.getValue ().toByteArray ();
messageData = new eu.mosaic_cloud.platform.interop.common.kv.KeyValueMessage (key, data, prependRequest.getEnvelope ().getContentEncoding (), prependRequest.getEnvelope ().getContentType ());
callback = new DriverOperationFinishedHandler (token, session, MemcachedDriver.class, MemcachedResponseTransmitter.class);
resultStore = driver.invokePrependOperation (token.getClientId (), messageData, callback);
callback.setDetails (KeyValueOperations.PREPEND, resultStore);
break;
case REPLACE_REQUEST :
final MemcachedPayloads.ReplaceRequest replaceRequest = (ReplaceRequest) message.payload;
token = replaceRequest.getToken ();