+ " request on node " + node.getId() + " for key " + key);
NonblockingStore store = nonblockingStores.get(node.getId());
if (pipeline.getOperation() == Operation.GET)
store.submitGetRequest(key, transforms, callback, timeoutMs);
else if (pipeline.getOperation() == Operation.GET_VERSIONS)
store.submitGetVersionsRequest(key, callback, timeoutMs);
else
throw new IllegalStateException(getClass().getName()
+ " does not support pipeline operation "