Examples of org.apache.hadoop.hbase.CellScanner

org.apache.hadoop.hbase.CellScanner
omething }
Often used reading {@link org.apache.hadoop.hbase.Cell}s written by {@link org.apache.hadoop.hbase.io.CellOutputStream}.

            // as the last successfully retrieved row.
            // See HBASE-5974
            nextCallSeq++;
            long timestamp = System.currentTimeMillis();
            // Results are returned via controller
            CellScanner cellScanner = controller.cellScanner();
            rrs = ResponseConverter.getResults(cellScanner, response);
            if (logScannerActivity) {
              long now = System.currentTimeMillis();
              if (now - timestamp > logCutOffLatency) {
                int rows = rrs == null ? 0 : rrs.length;

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      for (int i = 0; i < cycles; i++) {
        List<CellScannable> cells = new ArrayList<CellScannable>();
        // Message param = RequestConverter.buildMultiRequest(HConstants.EMPTY_BYTE_ARRAY, rm);
        ClientProtos.RegionAction.Builder builder = RequestConverter.buildNoDataRegionAction(
          HConstants.EMPTY_BYTE_ARRAY, rm, cells);
        CellScanner cellScanner = CellUtil.createCellScanner(cells);
        if (i % 1000 == 0) {
          LOG.info("" + i);
          // Uncomment this for a thread dump every so often.
          // ReflectionUtils.printThreadInfo(new PrintWriter(System.out),
          //  "Thread dump " + Thread.currentThread().getName());

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        responder.doRespond(callTooBig);
        return;
      }
      MethodDescriptor md = null;
      Message param = null;
      CellScanner cellScanner = null;
      try {
        if (header.hasRequestParam() && header.getRequestParam()) {
          md = this.service.getDescriptorForType().findMethodByName(header.getMethodName());
          Builder builder = this.service.getRequestPrototype(md).newBuilderForType();
          // To read the varint, I need an inputstream; might as well be a CIS.

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    long startTime = 0;
    if (LOG.isTraceEnabled()) {
      startTime = System.currentTimeMillis();
    }
    PayloadCarryingRpcController pcrc = (PayloadCarryingRpcController)controller;
    CellScanner cells = null;
    if (pcrc != null) {
      cells = pcrc.cellScanner();
      // Clear it here so we don't by mistake try and these cells processing results.
      pcrc.setCellScanner(null);
    }

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  public MutateResponse mutate(final RpcController rpcc,
      final MutateRequest request) throws ServiceException {
    // rpc controller is how we bring in data via the back door;  it is unprotobuf'ed data.
    // It is also the conduit via which we pass back data.
    PayloadCarryingRpcController controller = (PayloadCarryingRpcController)rpcc;
    CellScanner cellScanner = controller != null? controller.cellScanner(): null;
    // Clear scanner so we are not holding on to reference across call.
    controller.setCellScanner(null);
    try {
      requestCount.increment();
      HRegion region = getRegion(request.getRegion());

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  public MultiResponse multi(final RpcController rpcc, final MultiRequest request)
  throws ServiceException {
    // rpc controller is how we bring in data via the back door;  it is unprotobuf'ed data.
    // It is also the conduit via which we pass back data.
    PayloadCarryingRpcController controller = (PayloadCarryingRpcController)rpcc;
    CellScanner cellScanner = controller != null? controller.cellScanner(): null;
    if (controller != null) controller.setCellScanner(null);
    List<CellScannable> cellsToReturn = null;
     MultiResponse.Builder responseBuilder = MultiResponse.newBuilder();


     for (RegionAction regionAction : request.getRegionActionList()) {

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  @Override
  @QosPriority(priority = HConstants.REPLAY_QOS)
  public ReplicateWALEntryResponse replay(final RpcController controller,
      final ReplicateWALEntryRequest request) throws ServiceException {
    long before = EnvironmentEdgeManager.currentTimeMillis();
    CellScanner cells = ((PayloadCarryingRpcController) controller).cellScanner();
    try {
      checkOpen();
      List<WALEntry> entries = request.getEntryList();
      if (entries == null || entries.isEmpty()) {
        // empty input

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          if (call != null && call.responseDefaultType != null) {
            Builder builder = call.responseDefaultType.newBuilderForType();
            builder.mergeDelimitedFrom(in);
            value = builder.build();
          }
          CellScanner cellBlockScanner = null;
          if (responseHeader.hasCellBlockMeta()) {
            int size = responseHeader.getCellBlockMeta().getLength();
            byte [] cellBlock = new byte[size];
            IOUtils.readFully(this.in, cellBlock, 0, cellBlock.length);
            cellBlockScanner = ipcUtil.createCellScanner(this.codec, this.compressor, cellBlock);

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          callQueueSize.add(call.getSize() * -1);
          // Set the response for undelayed calls and delayed calls with
          // undelayed responses.
          if (!call.isDelayed() || !call.isReturnValueDelayed()) {
            Message param = resultPair != null? resultPair.getFirst(): null;
            CellScanner cells = resultPair != null? resultPair.getSecond(): null;
            call.setResponse(param, cells, errorThrowable, error);
          }
          call.sendResponseIfReady();
          status.markComplete("Sent response");
        } catch (InterruptedException e) {

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  public MutateResponse mutate(final RpcController rpcc,
      final MutateRequest request) throws ServiceException {
    // rpc controller is how we bring in data via the back door;  it is unprotobuf'ed data.
    // It is also the conduit via which we pass back data.
    PayloadCarryingRpcController controller = (PayloadCarryingRpcController)rpcc;
    CellScanner cellScanner = controller != null? controller.cellScanner(): null;
    // Clear scanner so we are not holding on to reference across call.
    if (controller != null) controller.setCellScanner(null);
    try {
      checkOpen();
      requestCount.increment();

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