/** * Create a protocol buffer UpdateFavoredNodesRequest to update a list of favorednode mappings * @param updateRegionInfos * @return a protocol buffer UpdateFavoredNodesRequest */ public static UpdateFavoredNodesRequest buildUpdateFavoredNodesRequest( final List<Pair<HRegionInfo, List<ServerName>>> updateRegionInfos) { UpdateFavoredNodesRequest.Builder ubuilder = UpdateFavoredNodesRequest.newBuilder(); for (Pair<HRegionInfo, List<ServerName>> pair : updateRegionInfos) { RegionUpdateInfo.Builder builder = RegionUpdateInfo.newBuilder(); builder.setRegion(HRegionInfo.convert(pair.getFirst())); for (ServerName server : pair.getSecond()) { builder.addFavoredNodes(ProtobufUtil.toServerName(server)); } ubuilder.addUpdateInfo(builder.build()); } return ubuilder.build(); }