Package org.apache.hadoop.hdfs

Examples of org.apache.hadoop.hdfs.DFSInputStream

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    } catch (InterruptedException e) {
      response.sendError(400, e.getMessage());
      return;
    }
   
    DFSInputStream in = null;
    OutputStream out = null;

    try {
      in = dfs.open(filename);
      out = response.getOutputStream();
      final long fileLen = in.getFileLength();
      if (reqRanges != null) {
        List<InclusiveByteRange> ranges =
          InclusiveByteRange.satisfiableRanges(reqRanges, fileLen);
        StreamFile.sendPartialData(in, out, response, fileLen, ranges);
      } else {
        // No ranges, so send entire file
        response.setHeader("Content-Disposition", "attachment; filename=\"" +
                           rawFilename + "\"");
        response.setContentType("application/octet-stream");
        response.setHeader(CONTENT_LENGTH, "" + fileLen);
        StreamFile.copyFromOffset(in, out, 0L, fileLen);
      }
      in.close();
      in = null;
      out.close();
      out = null;
      dfs.close();
      dfs = null;
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      setUpForDoGetTest(cluster, testFile);

      Mockito.doThrow(new IOException()).when(mockHttpServletResponse)
          .getOutputStream();
      DFSInputStream fsMock = Mockito.mock(DFSInputStream.class);

      Mockito.doReturn(fsMock).when(clientMock).open(testFile.toString());

      Mockito.doReturn(Long.valueOf(4)).when(fsMock).getFileLength();
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  @SuppressWarnings("unchecked")
  public void testReadFromOneDN() throws IOException {
    LOG.info("Starting testReadFromOneDN()");
    DFSClient client = new DFSClient(
        new InetSocketAddress("localhost", cluster.getNameNodePort()), conf);
    DFSInputStream in = spy(client.open(testFile.toString()));
    LOG.info("opened " + testFile.toString());

    byte[] dataBuf = new byte[BLOCK_SIZE];

    MockGetBlockReader answer = new MockGetBlockReader();
    Mockito.doAnswer(answer).when(in).getBlockReader(
                           (InetSocketAddress) Matchers.anyObject(),
                           (DatanodeInfo) Matchers.anyObject(),
                           Matchers.anyString(),
                           (ExtendedBlock) Matchers.anyObject(),
                           (Token<BlockTokenIdentifier>) Matchers.anyObject(),
                           Matchers.anyLong(),
                           Matchers.anyLong(),
                           Matchers.anyInt(),
                           Matchers.anyBoolean(),
                           Matchers.anyString());

    // Initial read
    pread(in, 0, dataBuf, 0, dataBuf.length);
    // Read again and verify that the socket is the same
    pread(in, FILE_SIZE - dataBuf.length, dataBuf, 0, dataBuf.length);
    pread(in, 1024, dataBuf, 0, dataBuf.length);
    pread(in, -1, dataBuf, 0, dataBuf.length);            // No seek; just read
    pread(in, 64, dataBuf, 0, dataBuf.length / 2);

    in.close();
  }
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    }

    private byte[] cacheInitialContents() throws IOException {
      HdfsFileStatus status = dfsClient.getFileInfo(name);
      byte[] content = new byte[(int)status.getLen()];
      DFSInputStream in = null;
      try {
        in = dfsClient.open(name);
        IOUtils.readFully(in, content, 0, content.length);
      } finally {
        in.close();
      }
      return content;
    }
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    public void checkSalvagedRemains() throws IOException {
      int chainIdx = 0;
      HdfsFileStatus status = dfsClient.getFileInfo(name);
      long length = status.getLen();
      int numBlocks = (int)((length + blockSize - 1) / blockSize);
      DFSInputStream in = null;
      byte[] blockBuffer = new byte[blockSize];

      try {
        for (int blockIdx = 0; blockIdx < numBlocks; blockIdx++) {
          if (blocksToCorrupt.contains(blockIdx)) {
            if (in != null) {
              in.close();
              in = null;
            }
            continue;
          }
          if (in == null) {
            in = dfsClient.open("/lost+found" + name + "/" + chainIdx);
            chainIdx++;
          }
          int len = blockBuffer.length;
          if (blockIdx == (numBlocks - 1)) {
            // The last block might not be full-length
            len = (int)(in.getFileLength() % blockSize);
            if (len == 0) len = blockBuffer.length;
          }
          IOUtils.readFully(in, blockBuffer, 0, (int)len);
          int startIdx = blockIdx * blockSize;
          for (int i = 0; i < len; i++) {
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  @SuppressWarnings("unchecked")
  public void testReadFromOneDN() throws IOException {
    LOG.info("Starting testReadFromOneDN()");
    DFSClient client = new DFSClient(
        new InetSocketAddress("localhost", cluster.getNameNodePort()), conf);
    DFSInputStream in = spy(client.open(testFile.toString()));
    LOG.info("opened " + testFile.toString());

    byte[] dataBuf = new byte[BLOCK_SIZE];

    MockGetBlockReader answer = new MockGetBlockReader();
    Mockito.doAnswer(answer).when(in).getBlockReader(
                           (InetSocketAddress) Matchers.anyObject(),
                           Matchers.anyString(),
                           (ExtendedBlock) Matchers.anyObject(),
                           (Token<BlockTokenIdentifier>) Matchers.anyObject(),
                           Matchers.anyLong(),
                           Matchers.anyLong(),
                           Matchers.anyInt(),
                           Matchers.anyBoolean(),
                           Matchers.anyString());

    // Initial read
    pread(in, 0, dataBuf, 0, dataBuf.length);
    // Read again and verify that the socket is the same
    pread(in, FILE_SIZE - dataBuf.length, dataBuf, 0, dataBuf.length);
    pread(in, 1024, dataBuf, 0, dataBuf.length);
    pread(in, -1, dataBuf, 0, dataBuf.length);            // No seek; just read
    pread(in, 64, dataBuf, 0, dataBuf.length / 2);

    in.close();
  }
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    } catch (InterruptedException e) {
      response.sendError(400, e.getMessage());
      return;
    }
   
    final DFSInputStream in = dfs.open(filename);
    final long fileLen = in.getFileLength();
    OutputStream os = response.getOutputStream();

    try {
      if (reqRanges != null) {
        List<?> ranges = InclusiveByteRange.satisfiableRanges(reqRanges,
                                                           fileLen);
        StreamFile.sendPartialData(in, os, response, fileLen, ranges);
      } else {
        // No ranges, so send entire file
        response.setHeader("Content-Disposition", "attachment; filename=\"" +
                           filename + "\"");
        response.setContentType("application/octet-stream");
        response.setHeader(CONTENT_LENGTH, "" + fileLen);
        StreamFile.writeTo(in, os, 0L, fileLen);
      }
    } catch(IOException e) {
      if (LOG.isDebugEnabled()) {
        LOG.debug("response.isCommitted()=" + response.isCommitted(), e);
      }
      throw e;
    } finally {
      try {
        in.close();
        os.close();
      } finally {
        dfs.close();
      }
    }     
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    return new CacheLoader<DFSInputStreamCaheKey, FSDataInputStream>() {

      @Override
      public FSDataInputStream load(DFSInputStreamCaheKey key) throws Exception {
        DFSClient client = getDfsClient(key.userId);
        DFSInputStream dis = client.open(key.inodePath);
        return new FSDataInputStream(dis);
      }
    };
  }
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    } catch (InterruptedException e) {
      response.sendError(400, e.getMessage());
      return;
    }
   
    DFSInputStream in = null;
    OutputStream out = null;

    try {
      in = dfs.open(filename);
      out = response.getOutputStream();
      final long fileLen = in.getFileLength();
      if (reqRanges != null) {
        List<InclusiveByteRange> ranges =
          InclusiveByteRange.satisfiableRanges(reqRanges, fileLen);
        StreamFile.sendPartialData(in, out, response, fileLen, ranges);
      } else {
        // No ranges, so send entire file
        response.setHeader("Content-Disposition", "attachment; filename=\"" +
                           rawFilename + "\"");
        response.setContentType("application/octet-stream");
        response.setHeader(CONTENT_LENGTH, "" + fileLen);
        StreamFile.copyFromOffset(in, out, 0L, fileLen);
      }
      in.close();
      in = null;
      out.close();
      out = null;
      dfs.close();
      dfs = null;
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      setUpForDoGetTest(cluster, testFile);

      Mockito.doThrow(new IOException()).when(mockHttpServletResponse)
          .getOutputStream();
      DFSInputStream fsMock = Mockito.mock(DFSInputStream.class);

      Mockito.doReturn(fsMock).when(clientMock).open(testFile.toString());

      Mockito.doReturn(Long.valueOf(4)).when(fsMock).getFileLength();
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Related Classes of org.apache.hadoop.hdfs.DFSInputStream

  • MStress_Client
  • org.apache.hadoop.fs.FSClientReadProfilingData
  • org.apache.hadoop.hdfs.BlockReader
  • org.apache.hadoop.hdfs.client.ClientMmap
  • org.apache.hadoop.hdfs.net.DomainPeer
  • org.apache.hadoop.hdfs.net.Peer
  • org.apache.hadoop.hdfs.nfs.nfs3.DFSClientCache
  • org.apache.hadoop.hdfs.nfs.nfs3.RpcProgramNfs3
  • org.apache.hadoop.hdfs.profiling.DFSReadProfilingData
  • org.apache.hadoop.hdfs.protocol.Block
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