Example #1
0
  /** {@inheritDoc} */
  @Nullable
  @Override
  public final Map<? extends GridComputeJob, GridNode> map(
      List<GridNode> subgrid, @Nullable GridGgfsTaskArgs<T> args) throws GridException {
    assert grid != null;
    assert args != null;

    GridGgfs ggfs = grid.ggfs(args.ggfsName());
    GridGgfsProcessorAdapter ggfsProc = ((GridKernal) grid).context().ggfs();

    Map<GridComputeJob, GridNode> splitMap = new HashMap<>();

    Map<UUID, GridNode> nodes = mapSubgrid(subgrid);

    for (GridGgfsPath path : args.paths()) {
      GridGgfsFile file = ggfs.info(path);

      if (file == null) {
        if (args.skipNonExistentFiles()) continue;
        else
          throw new GridException("Failed to process GGFS file because it doesn't exist: " + path);
      }

      Collection<GridGgfsBlockLocation> aff =
          ggfs.affinity(path, 0, file.length(), args.maxRangeLength());

      long totalLen = 0;

      for (GridGgfsBlockLocation loc : aff) {
        GridNode node = null;

        for (UUID nodeId : loc.nodeIds()) {
          node = nodes.get(nodeId);

          if (node != null) break;
        }

        if (node == null)
          throw new GridException(
              "Failed to find any of block affinity nodes in subgrid [loc="
                  + loc
                  + ", subgrid="
                  + subgrid
                  + ']');

        GridGgfsJob job =
            createJob(path, new GridGgfsFileRange(file.path(), loc.start(), loc.length()), args);

        if (job != null) {
          GridComputeJob jobImpl =
              ggfsProc.createJob(
                  job, ggfs.name(), file.path(), loc.start(), loc.length(), args.recordResolver());

          splitMap.put(jobImpl, node);
        }

        totalLen += loc.length();
      }

      assert totalLen == file.length();
    }

    return splitMap;
  }